| “ | Ethan. Me. All the unclaimed. Don't let it... Don't let it happen again. | ” |
–Luke saying his last words to Percy, in The Last Olympian | ||
Luke Castellan was a Greek demigod, the son of Hermes and May Castellan. He was one of the main antagonists of the Percy Jackson and the Olympians series. He was tricked by the Titan lord Kronos into hosting his spirit. Although he is considered as the series' main demigod antagonist, he died at age twenty-three as the hero of the Great Prophecy.
History
Early life
Luke was born in Westport, Connecticut to Hermes and May Castellan, a mortal who had the ability to see through the Mist. As a baby, his parents took him with them to Camp Half-Blood, where May wanted to host the Oracle. Right before entering the big house, she gave her squirming baby son to Hermes. Shortly after, a green glow lights up the house's windows, and a terrified Hermes hands baby Luke to Chiron and tried to save May, but was too late, due to the horrible curse that Hades had placed upon the Oracle.
When he was nine years old, Luke ran away from his home, because of his mother's unstable mental problems brought about by the curse of Hades. Luke traveled for years, lonely and miserable. Once in a while Luke would try befriending a mortal, but they would never understand when he tried telling them the truth about himself, thinking that it was some sort of game, so Luke had always ended up leaving. At some point, his Celestial Bronze sword had somehow gotten melted in acid by a monster, so he took to using a golf club as a makeshift weapon.
Thalia, Halcyon Green, and Annabeth
When he was about eleven or twelve, Luke found a daughter of Zeus named Thalia Grace in a dragon's cave outside Charleston, after she had followed Zeus' sacred goat, Amaltheia, there. Being a demigod herself, Thalia was able to understand Luke, and they chose to team up to stay alive, subsequently traveling across the United States, battling monsters (and at one point, several automaton statues), fending for themselves, with Thalia "saving [his] life a dozen times" according to Luke.
One morning, they had reached Richmond, Virginia, where once again, Thalia was in pursuit of Amaltheia. Luke seemed to have a crush on Thalia and just couldn't tell her no, even though he knew it was against his better judgement. The goat directed them to an old mansion and once inside (Luke's handiwork) they discovered it was a deadly trap. They met Halcyon Green, a demigod son of Apollo, who had been imprisoned inside the mansion, unable to speak, because he had saved a girl's life in his youth, with his abilities to see into the future, incurring the wrath of the gods. A part of Hal's curse was also to bring in demigods to be eaten by three leucrotae who feed at sunset. Luke was angered that the gods would do this to Hal and wanted to find a way to rescue him and Thalia. Hal told them that every demigod thought that at first, that they could escape, but soon realized it wasn't possible. Hal told them of a treasure that was in the mansion, assuming they came there for it, but they hadn't. They went after it anyways. Luke was magically able to break the lock, and Thalia was able to claim the Aegis bracelet as a sign from Zeus, as he has a shield very similar in design.
Halcyon Green
They were running out of time and ways of defeating the leucrotae until Luke discovered they could make Greek Fire, after hours of searching the Internet with no solution. Within the hour, they had created the Greek Fire from different ingredients and some lightning. Hal decided that he would sacrifice himself to give them time to escape, as he may have foreseen. But before he did, Hal had predicted Luke's dark future but left him vague answers when questioned about it. Luke didn't know what he meant, but was disturbed from what he said. Hal also gave Luke his personal diary and a dagger and made Luke promise that he would learn from his mistakes and not be pushed around by the gods. Thus, by making this promise, Luke made the first step towards his ultimate betrayal of the gods and allegiance to the Titan King Kronos.
When the leucrotae attacked, Hal used the Greek Fire to cause an explosion, which killed himself and two of the monsters. One leucrota escaped, but barely, which surprised Luke, but Thalia was able to use the bracelet to summon Aegis and scare the monster away, giving them enough to reach the doors, just as the mansion completely exploded. They got away quickly, cleaning up in the local restrooms, and resting before Luke sensed a presence in a nearby alley. It was in that alley that the two meet 7-year-old Annabeth Chase, and, adopting her as his little sister, Luke became the fatherly figure of the group, they left Richmond and headed to their safe house on the James River. Luke would later write down this incident in the green leather diary that Halcyon had given him.
Meeting Hermes
They fought for survival and avoided monsters together. They seem to have taken quite a few photos of themselves during this time, some of which Jason Grace sees in The Lost Hero. They show Luke wearing ragged makeshift leather armor over his t-shirt, enthusiastically pointing to a dark alley; Luke and Annabeth sitting at a campfire, laughing hysterically, and a photo of them together with Thalia.
In The Sea of Monsters, Annabeth reveals that during this time, she, Luke, and Thalia had made about a dozen camouflaged half-blood safe houses (woven from plants, like Native American huts), that still contain sleeping bags, blankets, ice chests, and kerosene lamps, along with Celestial Bronze javelin tips, quivers with arrows, swords, and nectar with ambrosia.
At some point, when Thalia got injured by a monster and Luke and Annabeth wanted to rest, Luke took them to his mother's house to heal their wounds. When they approached the house, a loud voice boomed above: "You shouldn't have returned", but that didn't seem to matter to Luke. There, Luke finally meet Hermes, his father, for the first and only time. Luke was angry with him, and demanded to know why Hermes had never showed up when Luke prayed to him so desperately, as he hid from his mother when she had fits, and when they were on their quest. Hermes inadvertently revealed that he knew Luke's fate, and when Luke eagerly asked about it (since Hal had only given him vague answers), but Hermes refused to tell him, knowing that he had already said too much. Luke then told his father that he couldn't possibly love him if he wouldn't tell him, and left with Thalia and Annabeth angrily, never to see his father again.
Meeting the Huntresses
According to Thalia, from that point on, Luke was never the same, and began to act like he had something to prove after that moment, which Annabeth, unfortunately, did not see as a problem, since Luke was her personal hero. They got into more skirmishes because of his recklessness, fighting more monsters (since Luke wanted to pick a fight with each one he came across), and they ran into the Hunters of Artemis. They asked Thalia to join, and she refused, saying she couldn't leave Luke. Zoë Nightshade, Artemis' lieutenant (at the time), hauntingly told her that she was being stupid, that Luke would betray her, that he would let her down someday (which would later come true) and that caused Thalia to resent and dislike the Hunters, as she did not believe them, even though Hal had given her a similar prediction before.
Journey to Camp Half-Blood
Eventually, a Satyr named Grover Underwood found them. Together, the quartet began to travel to Camp Half-Blood, but were chased by monsters sent by Hades, due to the Lord of the Dead still being furious and bitter about Thalia's father Zeus having once murdered his beloved Maria di Angelo, so proceeded to send out the most fearsome monsters of the Underworld after her. According to Annabeth, the real reason that Thalia died was because they ran into a Cyclops, who split them up inside a mansion, and used a loved one's voice to lure each person into a trap. When Annabeth found them, Luke, Thalia and Grover were tied up and hanging from the ceiling. The Cyclops used a variety of her friends' voices to lure Annabeth out into the open, and upon finally locating her, used her father's voice to lure her to her death. Annabeth, however, then stabbed the Cyclops in the foot with her knife, and untied Thalia, who took it from there. However, the Cyclops had slowed them down enough for a pack of Hellhounds and all three Furies to catch up to them.
Upon finally reaching the Camp Half-Blood border, Hal's first prediction came true, as Thalia chose to sacrifice herself so that Luke, Grover, and Annabeth could get into camp without being killed by the monsters that were hot on their trail. Thalia held back Hades' approaching army with her Aegis shield, Luke was forced to lead Annabeth up Camp Half-Blood Hill, holding her hand, while Grover pranced nervously at the summit, urging them to hurry. Annabeth stumbled, twisting her ankle, and Luke scooped her up and carried her. As Thalia continued the hopeless battle against Hades' forces, Grover ran into camp, with Luke following, with Annabeth crying, beating at his chest and screaming that they couldn’t leave Thalia alone. But it was already too late at that point, as Thalia had already been fatally wounded.
As Thalia was dying, being surrounded by monsters, Zeus took pity on her and turned her into a pine tree. From that point on, Luke lived at camp all year round, all the while slowly falling into darkness, furious at the gods, bitter about Thalia's fate.
Failed Quest and Allegiance to Kronos
When Luke was about seventeen, Luke was offered a quest by his father Hermes: to seek a Golden Apple at the Garden of Hesperides from the tree. Luke was honored by this offer, but eventually began to question it, as it was done before by Hercules, and he didn't want to do a quest someone had already done. He went on this journey, but failed and was scratched (and given the scar on his face) by the dragon guarding the tree, Ladon. He returned to the camp and according to his words, was treated with "pity" by the campers. It was then that he began to hold a grudge against Olympus and his father, Hermes, who he felt didn't love him. He wanted to tear Olympus down, stone by stone at that point. Luke apparently was able to injure Ladon and steal a claw; he has since kept the Ladon's claw in the Big House attic. He bided his time of revenge and began to dream of Kronos.
He was later contacted in his sleep by Kronos, Lord of the Titans. The nature of this encounter is unknown (though it is most likely that Kronos knew that he could exploit Luke's resentment of the gods), but he was convinced to join Kronos' cause out of a desire for revenge. As revealed in The Battle of the Labyrinth, Luke accepted the sword Backbiter from Kronos after pledging himself to him, taking the blade as proof of his oath. Much later, when Percy Jackson first saw the sword in The Lightning Thief, he could sense that the two metals it was forged from were trying to escape each other during the forging, and that someone (most likely the forger) died in the creation of the sinister sword.
After pledging allegiance to the Titan King, Luke was assigned to steal the Master Bolt, Zeus's primary weapon, and the Helm of Darkness, Hades's godly weapon, in order to start a civil war between the gods. On a camp field trip to Mount Olympus Luke made his move. While the other campers and counselors were asleep he entered the throne room and was able to steal the Master Bolt and the Helm of Darkness. The gods believed that no one would ever dare steal their symbols of power, so they left them by their thrones. They later discovered the theft and went to search for the thief. The Furies went to work searching for Hades, while Zeus sent out his best trackers, Artemis, Ares and Athena. Ares found Luke and fought with him to get the bolt back. According to Luke, he would have won, but underestimated his opponent and was outmatched. However, he managed to save himself by speaking in Kronos' words that if the Master Bolt was successfully stolen, there would be a full-scale war. Ares was awed by this, as he was the god of war, and spared Luke, but took the Bolt and the Helm with him. It is presumable that Ares was dreaming of Kronos, although unknown from before or after Luke's conversation with him. Luke then managed to make it safely back to Mount Olympus before anyone noticed his absence.
Percy Jackson and the Olympians
The Lightning Thief
Although Luke succeeded in his mission, his failure to defeat Ares cost him dearly. Kronos punished him with nightmares, and Luke swore never to fail the malevolent Titan again. This would also cause him to fear Kronos greatly for many of his later years.
When Luke was about nineteen, he was told in a dream from Kronos that another camper would be coming to Camp Half-Blood, one who would willingly (but not knowing) take the stolen weapons of the gods down to Tartarus, therefore ensuring that there would be a war. Luke remembers this and finds this camper in the form of a twelve-year old boy named Percy Jackson.
Luke, conversing with Percy, through Iris Message in the Graphic Novel
Knowing that Percy was the boy that Kronos was talking about, Luke befriends the boy and is successful in earning his trust and friendship. He welcomes him into the Hermes cabin (where children who haven't been claimed yet go), trains him in sword combat, and provides the moral support that Percy needed as a newcomer.
One night after a Capture the Flag game, Luke summons a hellhound to attack Percy in an attempt to make Chiron, the camp activities director, believe that the camp isn't safe for Percy. The centaur went for the bait. Unaware of Luke's treachery, Chiron sends Percy, along with Annabeth and Grover, to find the Master Bolt, in order to prevent a war. Because monsters of Hades were unusually active and because it was as yet unknown that the Helm of Darkness was also stolen, it was believed that Hades was the Lightning thief and the group set out to go to the Underworld. Before Percy goes on his quest, Luke gives him a pair of winged shoes as a gift. These shoes were actually cursed to drag him, along with the Master Bolt, down into Tartarus when he neared it during his journey into the Underworld. However, this failed when Percy gave the shoes to Grover because Percy shouldn't fly as Zeus is the Lord of the Skies and does not like Percy. Grover managed to escape from the burden when the time came.
After Percy discovers that the Master Bolt was in a backpack that Ares had given him and he had won the Helm of Darkness in a duel with Ares (who was unknowingly being influenced by Kronos), Percy returns alive to Camp Half-Blood along with his two companions, after returning the Bolt to Zeus, thwarting Kronos's plan. While furious at his failure, Luke pretended to cheer for Percy after the latter was given his first clay bead. After that, however, Luke began acting a little distant, though Percy assumed this was because Luke was somewhat jealous at how much attention Percy was getting.
As later revealed in The Last Olympian, it was at some point around this time, Luke confronts Silena Beauregard, charms her, and persuades her to become his spy by telling her that she would be saving lives. Afterwards, she wanted to stop being a spy for the Titans, but Luke blackmailed her saying that he would reveal her secret if she ever stopped and would harm Charles Beckendorf, her crush.
In order to prevent Percy from interfering again, Luke takes him in the woods to "look for something to fight." While talking with Luke, Percy begins to slowly see Luke's dark side; Luke's words are bitter and he mentions his sword, Backbiter, which is able to kill both monsters and mortals. He says he will escape and then summons a pit scorpion to poison Percy. Luke tells Percy of his bitterness and desire for revenge, as well as his allegiance to Kronos, saying that there will be a new "Golden Age" that Percy won't be a part of, before teleporting away. Thus, the second prediction of Halcyon Green finally came true as well.
Though the assassination attempt on Percy fails, the scorpion does sting him, and it leaves a long-lasting asterisk-shaped scar. Before losing consciousness, Percy kills the scorpion and the wood nymphs bring him back to camp, for Chiron to heal.
Luke's betrayal was a surprise to many campers and counselors, especially to Annabeth, who reacted with great sadness at the loss of another childhood friend. Annabeth, however, admitted that Luke had been acting oddly ever since his failed quest and eventually admitted to herself that her dear friend was indeed a traitor and said "May the gods curse him."
The Sea of Monsters
A year after his defection, Luke took control of a monster cruise ship called the Princess Andromeda (obtained from the financial support of god-emperor Nero and Triumvirate Holdings), which serves as his base of operations. In order to render Camp Half-Blood defenseless and eliminate a major ally of the Olympians, he poisons Thalia's tree with elder python venom from the depths of Tartarus, with the help of a spy in the camp's ranks. The plan was to later 'allow' Percy and Annabeth to take the Golden Fleece and heal Thalia's tree, so Thalia would be purged from it. He also frames Chiron for the poisoning, causing him to be fired from the camp and be replaced by Tantalus.
At first, Clarisse La Rue was sent to find the Golden Fleece and save Grover from the Cyclops called Polyphemus but was interjected by Percy Jackson, along with a group of allies consisting of Annabeth Chase and Percy's half-brother Tyson, who is a Cyclops.
Hermes, Luke's father, persuaded Percy to go on this quest, and told him to go onto the Princess Andromeda, hoping that he would meet up with Luke and convince him to stop his assault on the gods, and to tell him that his dad did love him. Hermes gave Percy some traveling provisions and sent Annabeth and Tyson to him. Together, they sped out to the Princess Andromeda to confront Luke. Percy and his allies landed aboard the Princess Andromeda, not knowing of its true nature (a ship with monsters serving Kronos), and were captured.
During this time, Luke told the two of his plans to use the Golden Fleece to complete Kronos' resurrection and attempts to recruit Percy and Annabeth to his cause (not willing to recruit Tyson as he reminds him of the Cyclops that captured him and Thalia years ago). The two refuse, prompting Luke to order his bodyguards to feed the trio to a Drakon. Percy and the gang escape through a lifeboat propelled by the thermos containing the four winds given to him by Hermes.
Luke later intercepts Percy and his friends when they are looking for a boat that they can use to get back to camp. When he is interrogating Percy for the fleece in front of a pool (his army of monsters watching), Percy uses the pool to send an Iris message to Dionysus at Camp Half-Blood, tricking Luke into revealing the fact that Chiron was framed for the poisoning, resulting in Chiron being rehired (using the fact that he was in a panic due to Percy giving the Fleece to Clarisse). Enraged, he ordered Percy and his friends to be killed. Percy convinces Luke to duel him, a moment both had been waiting for a long time. Luke normally would not do something so blunt, but he had no choice, as his army would think he was weak if he were to refuse. Seconds into the duel, Luke easily defeats Percy (as Percy was out of practiced) even when the latter's power is augmented by the water, but is prevented from killing him when he's knocked into the pool by a boxing glove glued to an arrow. The arrow was shot by Chiron and his family of centaurs, who had just arrived and proceeded to save them. When Percy escapes, Luke's spite and hatred for the son of Poseidon only increases.
Thalia is resurrected at last. It is possible, and very likely, that Luke's allegiance to Kronos was affected after this. He obviously wanted Thalia to be resurrected, shown when he says to Percy that he was going to give him the Fleece after he was done using it to resurrect Kronos. Luke believed, that Thalia would be on his side, after all the times that they had spent cursing the gods, when they traveled together.
The Titan's Curse
After Thalia's resurrection, Kronos' second-in-command, Atlas, devises a plan to capture the Ophiotaurus, which would grant the power to destroy Olympus to whomever killed it and burned its entrails. He remembers the Prophecy and chooses Thalia to be its killer. This is revealed to be the reason for which Kronos wanted use the Fleece to resurrect Thalia in The Sea of Monsters.
Luke is assigned to aid Atlas with this. However, Thalia and Luke were dear childhood friends, bringing Luke hesitation to carry out the mission. Knowing this, Kronos tells Luke that if he doesn't succeed in this mission, he would be chosen to be Kronos' host and therefore suffer a fate worse than death.
Luke carries the sky in a plan to trick Annabeth into holding it after she is captured, which succeeds. He and Atlas later use this to their advantage by forcing a captive Artemis to hold the sky in Annabeth's place, and Luke seems happy that Annabeth survives. Atlas orders the death of Annabeth, but Luke convinces Atlas to keep her alive until the winter solstice because he knows that Percy will come for her.
Luke is later seen with Atlas when he summons Skeleton Warriors to hunt down Percy Jackson. His final appearance is when Percy, Thalia and Zoë Nightshade, arrive at the regrowing fortress of the Titans, where Artemis and Annabeth are being held captive. Refusing to have to kill Thalia, Luke attempts to sway her into joining their side. Thalia refuses and the two engage in an intense duel. The ferocity and power demonstrated is incredible, since lightning is noted to be flashing whenever their weapons clash, but Thalia ultimately wins the duel, disarming and injuring Luke, cornering him against the edge of a cliff (she claims that she was always able to beat Luke in a duel).
Luke continues to goad Thalia ("Is that what you want? To go back to your dad in triumph?"), but Annabeth begs her to spare him. As Thalia and Annabeth argue over his fate, Luke attempts to use the opportunity to try and disarm Thalia of her spear, but she instinctively kicks him off the cliff, something that causes her both guilt and grief.
Although Luke's seemingly lifeless body is seen by both an approaching army of monsters and Percy, it is later revealed that Luke somehow survived the fall. It is unknown how he survived the fall, although it may have been due to Kronos' magic. A theory is that Kronos reversed time for Luke and turned him back from dying.
After her battle with Luke, Thalia pledges herself to Artemis, in order to stop the prophecy from coming true through her, as she was only a few hours away from becoming 16. This means, that she is passing the prophecy onto Percy or Nico.
Poseidon later notes that the only way a non-Titan/god may take Atlas' burden is through their own free will and if they are a hero with great strength, a true heart, and great courage. Percy points out that Luke was able to take on the Titan's curse and then tricked Annabeth into taking the sky and then used Annabeth to lure Artemis into taking the sky from Annabeth and Poseidon says that Luke is an 'interesting case' and then is distracted.
The Battle of the Labyrinth
Not long after the battle atop Mount Tamalpais, Luke approaches Annabeth under a flag of truce. He begs her to run away with him, as the thought of becoming Kronos' host apparently becomes too much for him. He says they could runaway, like the old times, fighting monsters and being a family. Annabeth is suspicious, however, and refuses, despite her determination to save Luke. Annabeth later regrets her decision, something that becomes very clear when Hermes confronts her and blames her for Luke's fate, in a fit of anger. Luke himself is also hurt by the experience, as implied by Kronos when he states that Luke learned not to trust his friends the hard way.
After the meeting with Annabeth, Luke continues to serve Kronos and prepare to become his vessel. In The Last Olympian, Kronos mentions having to "pressure [Luke] in many ways" to convince him to bathe in the Styx in order to obtain the Curse of Achilles, but was ultimately successful. In order to do so, Luke had to visit his mother one last time, in order to get her blessing. Right before he bathed in the Styx, Luke was approached by the ghost of Achilles, who warned him of the potential dangers, though Luke still went through with the task, becoming invulnerable.
Luke is later seen in Percy's dream, aboard the Princess Andromeda, discussing his plan of attacking Camp Half-Blood with Kronos. Luke's demeanor becomes marginally softer, as he occasionally displays a moral compass that was previously unseen. This is most obvious when Luke becomes furious with Kelli for killing a boy in Seattle and when he indicates that he disapproves of Kampê's release, as she is too chaotic. He makes an attempt to talk with Annabeth again at Antaeus' Arena, but this fails when she and her companions escape. He is also seen in many of Percy's dreams.
When Luke is last seen, he is possessed by Kronos and rises from his gold coffin. He tries to attack Percy Jackson, and is only stopped by the combined efforts of Rachel Elizabeth Dare, throwing a blue hairbrush that hits him in the eye, and Nico di Angelo, who calls a black rock that blocks Kronos' exit and stops him and the Telekhines from following them.
The last line of the prophecy Annabeth recieved from the Oracle was 'and lose a love to worse than death.' meaning Luke. She said that she hadn't known who it would be yet, and therefore, she told no one, not even Percy.
The Last Olympian
For the largest part of the war, Luke is almost completely controlled by Kronos, with a few moments of wavering in the Titan's control. In this time, Percy learns that when Kronos achieves full power inside of Luke's body, he will burn through Luke's body and attain his true immortal form, which would mean the end of all life near him (except for immortals).
Kronos made his way to the throne room of the gods with Ethan Nakamura, destroying the city of Mount Olympus as he did so. Meanwhile Percy, Annabeth, Grover, and Thalia follow closely after. A statue of Hera falls and would have killed Percy and Annabeth if Thalia had not pushed them out of the way. Thalia's legs are trapped under the statue and the others continue on. Kronos battles them in the throne room when they arrive, but Annabeth is able to catch Luke's attention, reawakening him, but only partially.
After the two of them engage in a fierce duel with Percy, Ethan betrays Kronos after Percy persuades him, and attacks the Titan, unsuccessfully of course, as his sword shattered against Luke's invulnerable body. Several shards lashed, broke and bounced back at Ethan and impaled him, and he staggered to the ground. Kronos, now having another internal struggle with Luke, opens a fissure in the floor beneath Ethan, and he tumbled to his death. Kronos continued to battle the trio, getting closer to his ultimate transformation to his original self in which he would be unstoppable.
Annabeth managed to coax Luke back to his own mind as she lay, bloody, on the floor. Luke (still fighting against Kronos) lets Percy knock Backbiter into the hearth, leaving Luke defenseless. A beaten Annabeth gives Percy her knife, as they both realized that Luke was the true hero of the prophecy. Percy gave the knife to Luke who stabbed himself in his Achilles heel, which is located under his left arm, close to the underarm.
Percy, Annabeth, and Grover look away, hearing an explosion and Kronos' fading screams. Luke is left lying on the floor, dying. Annabeth says that he would go to Elysium and Luke replies "Think … rebirth. Try for three times. Isles of the Blest." Annabeth replies that "[he] always pushed himself too hard". Then, Luke asks Annabeth if she loved him. Annabeth replies that she loved him like a brother. Luke then pleads to Percy to not let this happen again, and thereby Halcyon's prediction of sacrifice finally comes true. With that, Luke dies just minutes before the gods arrived after defeating Typhon. In the end he is carried away by the Fates, blessed by Hermes (who kisses his forehead), and remembered and honored as a hero by not only Percy, Annabeth and Grover, but by all. Percy realizes that the blue string he saw the Fates cut four years ago, in The Lightning Thief, was not his, but Luke's.
The Heroes of Olympus
The Lost Hero
Luke is seen in pictures belonging to Thalia in Cabin One . When Jason Grace asks Annabeth, who looks pained, who he is, she says "That's Luke. He's dead now." signaling Annabeth has still not gotten over his death yet.
The Son of Neptune
Although there is no direct mention in the book, there is a hint of him. During Percy's first meeting with Octavian with Hazel Levesque, Percy tells Octavian that he reminds him of someone. Although Percy can't put his finger on it, Octavian shares resemblance to Luke.
The Mark of Athena
While fighting Chrysaor, Percy hears the voice of Luke (without meaning to), his old mentor, throwing out suggestions on how to fight the pirate but it didn't help. Later after watching Bacchus just sitting back as he and Jason fought for their lives, Percy realizes that he is about the same age Luke was when he turned against the gods. Percy also admits that he can understand how Luke became so spiteful, as Percy himself had also been used by the gods many times.
The House of Hades
When Percy and Annabeth run to the outer boundary of Night's realm, they reach the Acheron (the River of Pain). The ruthless and malevolent river shows Annabeth images of many of her friends dying. The most painful of all, however, is that of Luke sacrificing himself, and the blood on her dagger. The river blames Annabeth for not finding another way to defeat Kronos and prevent Luke's death, stating that his blood is on her hands. Annabeth, begins to fear that Luke's voice is among those in the Acheron, punished for his crimes against Olympus. The river tries to force her to jump in and "share his punishment", and Annabeth nearly does, though Percy intervenes just in time.
The Blood of Olympus
While talking to Jason about his problems with his mother, Annabeth mentions Luke, who had had a similar problem with his own mother.
The Trials of Apollo
The Hidden Oracle
Apollo mention's Luke while making a list of possible moles for the beast. He also tells Meg McCaffrey about him when they, Chiron, and Rachel Elizabeth Dare are discussing about Triumvirate Holdings.
Personality
Initially, Luke was quite terrified by his mother's crazy antics, which prompted him to run away from home at the age of nine. Luke began to feel angry at the Olympians ever since Hermes abandoned his mother (which is how Luke saw it), and didn't answer to his prayers. Luke, however, was much more selfless and moral in his youth, and blamed the gods only for what he saw as injustice, such as Hermes abandoning him, Zeus abandoning Thalia, and Apollo placing a curse on Halcyon Green. Also, he always looked out for Thalia, and took great care of Annabeth. In The Diary of Luke Castellan, Luke takes his new responsibility as her surrogate father very seriously, and is determined to do a better job than his own father did with him.
After Halcyon makes him promise to learn from his past mistakes, Luke misunderstands this as not letting the Olympians push him around, and begins to feel motivated to fight back. This is the first time he begins questioning the gods himself. Thalia's sacrifice greatly depressed Luke, and he was never able to get over the fact that she was actually transformed into a tree, and that her father, Zeus "let her die" and couldn't find another way to save her from Hades. Luke gets the urge to make them pay for it, and begins questioning the gods even more than before. Luke later claimed that if Thalia was alive that she would be on his side, opposing the gods. Like Annabeth, Luke showed a particular dislike of Cyclopes, since one of those monsters had been the actual cause of Thalia's death
However, the final straw would finally come three years later, after Luke failed on his quest to retrieve a golden apple from the Garden of the Hesperides. Luke, however, saw this quest as unoriginal, and saw "no glory in repeating what others had done." He felt so miserable and furious at the gods, that, as Luke later admits, his attitude became far crueler than before, and he "wanted to pull Olympus down stone by stone right then", but was able to wait. Even Annabeth claims that Luke never was the same ever since returning from his quest. At that point in time, Luke started dreaming of Kronos, and, after being punished through nightmares, Luke finally allied himself with the evil Titan King, ultimately betraying Camp Half-Blood, just as Halcyon had predicted that he would, years ago. By this point in time, Luke became very deceitful and convincing, as he was easily able to initially persuade Percy that he was a friend, and nobody, not even Annabeth or Chiron suspected him of associating with Kronos. According to Luke himself, he can sometimes be overconfident, such as when he underestimated Ares, and was nearly killed. Only Kronos' timely intervention saved him.
For the sake of resurrecting Kronos, Luke became crueler than ever, and was even willing to send Percy to his certain death into Tartarus through trickery and deceit, just so that his master could retrieve the Helm of Darkness and the Master Bolt. Further demonstrations of Luke's new found cruelty are his firm belief that "the West is rotten to the core and has to be destroyed"; his wish to destroy Olympus and every throne "crushed to rubble"; his lack of consideration before poisoning Thalia's pine (though he did this only to have Percy resurrect her and to persuade Thalia to side with him by burning the Ophiotaurus); and his malicious manipulation and blackmail of Silena Beauregard. He was also intensely callous and sadistic, intending to make Percy watch as his friends Tyson and Grover were devoured by an Aethiopian Drakon aboard the Princess Andromeda in The Sea of Monsters, and also sneering at Thalia when the latter held him at the point of a sword in The Titan's Curse. However, Luke still did seem to possess at least some morals, as in The Battle of the Labyrinth he was furious and disgusted with Kelli for egregiously murdering a boy in Seattle, and he disapproves of Kampê's release, as she is too chaotic.
By The Battle of the Labyrinth, Luke starts fear Kronos more, and might have had his first doubts about the Titan King, since Luke visited Annabeth and tried to convince him to run away from him before Kronos uses him body as a host. According to Kronos himself, he later "had to pressure Luke in many ways" in order to convince him to bath in the Styx. Kronos later reveals that Luke secretly feared Percy, possibly because only he had the potential to ruin the Titan King's plans with his prophesied ultimate choice to save Olympus. Luke has an extremely strong will, this was shown when he was able to fight Kronos himself for control of his body in The Last Olympian.
In the end, however, when Annabeth reminds Luke of his initial promise to be a proper family for her, Luke realizes that he was mislead by Kronos the entire time, and that the Titan ultimately views him as disposable, as he intended to destroy his body as soon as he returns to full power. Ultimately, Luke proves that he is ultimately good at heart, and chooses to sacrifice himself in order to destroy Kronos once and for all. In this way, Luke is more 'heroic' in the old sense of the terms, such as the stories of Theseus, Jason or Hercules. Just before he dies, Luke repents of his sins, and makes Percy promise to never let another war like that ever happen again. Luke selflessly pleads that Percy makes sure that all of the unclaimed demigods are finally claimed by their parents and given their own cabins. In that way, Luke is, overall, a fully redeemable character in the end.
Interestingly, in most of the times he appears as the villain in Annabeth's presence, Luke tries to pull strings with his masters so that Annabeth is unharmed or held to benefit from the outcome, showing that he had a certain affection towards her.
Appearance
In The Lost Hero, a photo shows a 15-year-old Luke - a sandy blonde haired boy with a mischievous smile (shared by most of his half-siblings), wearing ragged makeshift leather armor over his T-shirt.
In The Lightning Thief, Luke is described as a tall, handsome college-aged young man whom quite a few girls liked, with short-cropped sandy blonde hair, blue eyes, an athletic and muscular build, and a sneaky look like all Hermes demigod children. He is described throughout the series as being college-aged. Many girls found him particularly attractive, even an Empousa named Kelli. The only thing unsettling about Luke's appearance - as noted by Percy - was a thick, deep pale scar that ran from the bottom of his eye down to his chin. The scar was caused when Luke stole a golden apple from the Garden of the Hesperides and was then clawed by Ladon, the guardian dragon of the tree.
Although he was generally considered very attractive, Luke's appearance gradually varied over the course of the series. In the first two books The Lightning Thief and The Sea of Monsters, he looked as he always did at Camp Half-Blood, but come The Titan's Curse, he began to look sickly and aged. His usually tanned skin became ghostly pale, and his hair white (supposedly with gray streaks from holding the sky), especially under the moonlight. However, in The Battle of the Labyrinth, Luke's healthy appearance returned as he became closer to being taken over by Kronos. This was most likely due to his bathing in the River Styx, and taking on the Curse of Achilles. He wore a white chiton and himation, which made him look timeless, similar to the minor gods. Percy thought he looked too healthy, as Luke's skin had an unnatural glow to it.
Abilities
- ADHD: Like all demigods, Luke possesses inborn supernatural battle reflexes and senses that he uses to analyze the fighting style of his opponent.
- Fighting Skills: Even before coming to Camp Half-Blood, Luke was able to survive out in the open for years, even when he lost his sword was forced to use a golf club as a weapon instead. According to Annabeth, Luke was "an amazing monster-fighter, even without training." During the five years he spent at Camp Half-Blood, Luke greatly enhanced his fighting abilities, and was trained in both swordsmanship and hand-to-hand combat. By the time he left Camp, Luke became the best swordsman in Camp Half-Blood in the last 300 years.
- Swordsmanship: Luke is an expert swordsman, possibly the best demigod swordsman at Camp Half-Blood during the time he spent there, surpassing even the Ares and Athena demigods. In The Lightning Thief, a Hermes camper stated that Luke was "the best swordsman in the last three hundred years." In addition, near the end on the first book, when Luke was revealed to be the traitor and the Lightning Thief, he claimed he could have beaten Ares if he, Luke was more cautious. In The Sea of Monsters, Luke easily defeated Percy, even when the latter's power was temporarily augmented by water. At the time, however, Percy wasn't fully trained. In The Titan's Curse, Luke was able to hold his ground against Thalia before being ultimately defeated.
- Hand-to-hand combat (Movie only): in the climax of the second film The Sea of Monsters, Luke is shown to be a superb unarmed combatant, easily overpowering Percy with flawlessly-placed attacks and an application of near-superhuman strength. This is made more impressive since Percy was carrying a sword at the time, but Luke still managed to disarm and even obtain the weapon for himself. He would have killed Percy if Tyson - a far stronger individual with the element of surprise - hadn't intervened.
- Dyslexia: His brain is "hardwired" for Ancient Greek instead of modern languages.
- Will Power: Luke has an immensely strong will, shown when he was able to fight Kronos himself for control of his body in The Last Olympian.
As a son of Hermes, Luke was obviously a very powerful demigod, but very few of his powers are shown throughout the books:
- Lock Manipulation: Luke can magically sense the internal structure and mechanisms of any lock he touches, and is able to make it unlock. If concentrates enough, Luke can unlock it telekinetically. One of the few exceptions is the lock on Halcyon Green's front door, which was enchanted by Apollo to trap demigods inside. Luke doesn't really like using and advertising this ability, though.
- Lock Intuition: Luke can also identify curses and traps placed on locks. If he concentrates hard enough, he can deactivate them.
- Enhanced theft abilities: Luke is able to steal things without people noticing, even Olympian gods, such as when he stole both the Master Bolt and Helm of Darkness.
- Money manipulation: Since Hermes is the god of merchants, Luke mentions in The Diary of Luke Castellan that he is quite good with money.
- Teleportation: In the The Lightning Thief, Luke vanished in a "ripple of darkness" after swinging his sword through the air. However, whether this was due to his demigod ability as a son of Hermes, or was simply a power of his sword Blackbiter, is unknown.
These are abilities given to Luke once he was under the service of Kronos as his host:
- Curse of Achilles: After bathing in the River Styx, he was invincible and invulnerable in battle, except for his left armpit. The Curse also greatly enhanced Luke's strength, speed and stamina.
- Chronokinesis: Once possessed by Kronos he could control and manipulate time.
Weapons and Items
- First Sword: a Celestial bronze sword, Luke's original weapon, mentioned in The Diary of Luke Castellan. It had somehow gotten melted in acid by a monster.
- Golf Club: after losing his sword, Luke took to using a mortal golf club as a makeshift weapon, though it was destroyed while he was escaping Halcyon's mansion in The Diary of Luke Castellan.
- Bronze Knife: a Celestial Bronze dagger, given to him by Halcyon Green (given to him in turn by the young demigod girl that he'd helped save) in The Diary of Luke Castellan, since the dagger was rumored to always protect its owner. Luke subsequently gave it to Annabeth right after they first meet, and she has wielded it ever since.
- Backbiter: a weapon that Luke begins wielding at the end of The Lightning Thief. As revealed in The Battle of the Labyrinth, Luke accepted this sword from Kronos after pledging himself to him, taking the blade as proof of his oath. It is a half Celestial bronze and half tempered steel sword called Backbiter. Unlike Percy's sword Riptide, which can't hurt mortals, (as they aren't "important enough to kill") Backbiter can. However, it is not believed that Luke ever did hurt any mortals with it. The two metals that the sword is made from are opposites, having magic metal fused with mortal metal. Percy could sense that the two metals were trying to escape each other during the forging, and that someone (most likely the forger) died in the creation of the sinister sword. In The Battle of the Labyrinth, Backbiter is reforged into its original form - the Scythe of Kronos. Backbiter is named so as it will "bite back" at the gods who imprisoned Kronos in Tartarus. Kronos has the ability to turn his scythe back into Backbiter, as he does in the final battle at Mount Olympus.
Relationships
Romances
Annabeth, who Luke once took care of when she was young
Right before Luke died, he asked Annabeth if she'd loved him, but Annabeth said that for her, he was like a brother. Luke then nodded as if he expected it. Though since The Lightning Thief, Annabeth showed great concern, loyalty, and admiration to Luke.
There were many hints throughout the series that Annabeth had a crush on Luke. When Luke hugged her, Percy said that she looked "like she was going to pass out." Also, in The Battle of the Labyrinth, Luke was the "love" Annabeth had lost to a fate worse than death (when he became the host of Kronos). Percy is shown to be extremely jealous of Annabeth's unrequited crush, though he tries to play this off as his own hatred for Luke. Percy stated that Luke was one of the reasons (along with Calypso and Rachel) that made his relationship with Annabeth complicated at the end of the fourth book. The most obvious clue was in The Lost Hero, when Jason wondered if Annabeth had a crush on Luke, from the way she talked about him and looked at his photo.
Luke once tricked her into taking the sky for him in The Titan's Curse, which Annabeth willingly did. However, when Luke asked Annabeth to run away with him in The Battle of the Labyrinth, after he realized what Kronos intended for him, Annabeth refused, despite her determination to save him, the reaction most likely spurred by Luke leaving her to die after she took Atlas's burden for him.
Annabeth's crush was most likely one-sided, as she is seven years younger than Luke, and Luke was romantically attracted to Thalia. Luke, however, obviously cared a lot for her, and likely thought of Annabeth as a younger sibling. However, in The Mark of Athena, when Aphrodite mentions Annabeth's love life, she thinks that Luke showed show signs of romantic attraction to her right before his death.
Judging from her reaction to Jason's question about Luke in The Lost Hero, Annabeth still hadn't quite gotten Luke's death after several months.
In The House of Hades, it is finally reveled that ever since Luke's death, Annabeth had had to wrestle with the terrible thought that there could have been another way to defeat Kronos and prevent Luke's death, and that Luke's blood was on her hands. When the river Acheron shows her images of her friends dying, the most painful of all is that of Luke sacrificing himself, and his blood on her dagger. Annabeth begins to fear that Luke's voice is among those in the Acheron, punished for his crimes against Olympus. The river tries to force her to jump in and "share his punishment", and Annabeth nearly does, though Percy intervenes just in time.
Thalia, his former best friend and potential love interest
Family
Soon after Luke's birth, May tried to take in the spirit of the Oracle, but failed as Hades had cursed the Oracle during WWII so that her spirit would never move on. May suffered several side effects for many years, such as seeing glimpses of the future. She even saw Luke's fate and would go into spats of screaming that scared Luke growing up until he ran away from home.
He eventually went back with Thalia and Annabeth to get supplies, which was when he finally meet his dad, Hermes. He and Hermes got into an argument when Luke demanded to know why Hermes had abandoned him. He ran away again and eventually made it to Camp Half-Blood. His mother still waited everyday for him to return and made him sandwiches and cookies.
Luke visited her one last time in-between The Titan's Curse and The Battle of the Labyrinth, since he needed her blessing to bathe in the Styx.
Luke felt that Hermes abandoned him and his mom and because of that, Luke eventually came to hate all the Olympian gods. In The Diary of Luke Castellan, while Luke has already begun to resent Hermes and isn't very interested in meeting him, he still tries to be hopeful, and silently prays for Hermes to show him that there actually is "an upside to being [his] son."
However, when they finally meet shortly thereafter, Luke and Hermes get into an argument, with Luke demanding to know why Hermes had abandoned him, and pleading with his father to reveal his fate (since Halcyon had only given him vague answers). Luke ultimately storms off, never to see his father again. According to Thalia, from that point on, Luke was never the same, and began to act like he had something to prove, leading the trio into more skirmishes because of his recklessness and willingness to pick a fight with each and every monster they came across.
Luke's resentment only increased several years later, when Hermes had Chiron give him a quest that had already been completed by another hero, Hercules. However, Luke failed in his quest to steal a golden apple, and was left with a deep scar to remind him of his failure. From that point on, Luke's resentment became utter hatred, which induced him to ultimately betray Camp Half-Blood by siding with Kronos.
Hermes, on the other hand, loved his son very much and sent Percy to try and bring him back in The Sea of Monsters, but was disappointed when he wasn't able to. He also becomes furious at Annabeth, as she had chosen not to join him in The Battle of the Labyrinth, before Luke became Kronos' vessel, though Hermes is shown later admitting to Percy that it wasn't her fault in The Last Olympian.Rivals
Percy was Luke's worst and most feared enemy for a majority of the story, as he was considered to be the only one who could match Luke's skill with a sword, and the power he possessed.
In The Lightning Thief, Luke welcomes a newly arrived Percy Jackson into Camp Half-Blood. He makes him feel comfortable, going as far as stealing toiletries for him, guiding him and giving him sword fighting lessons. Percy thinks Luke is a really nice guy, although the Oracle forewarns him about Luke's true nature.
After successfully completing his quest, Percy is appraised by Luke. Towards the end of the summer, Luke takes Percy alone into the woods, and tells him he is leaving camp. The conversation soon takes a darker turn, when Luke reveals that he stole the Lightning Bolt and explained his motives for serving Kronos. Luke tries to get Percy's allegiance, but the latter refuses, forcing Luke to poison him with a pit scorpion (though Percy survived).
They meet each other a few times more times throughout the series. Each time, Luke tries to recruit Percy or kill him, and each time Percy tries to dissuade him from the madness. As the events progress, Percy grows to resent and hate Luke more and more, even wishing him to die. Annabeth's belief in Luke only serves to increase Percy's hatred. Kronos tells Percy that Luke feared him for his power (as a son of one of the Big Three).
Percy fulfills Luke's last wish for all the gods to claim their children in The Last Olympian, which earns him great fame.
In The Mark of Athena, several months after Luke's death, Percy no longer bears hatred towards Luke, and soon actually understands why Luke hated the Olympians.
Film
The Lightning Thief
Unlike in the novel, where Kronos was eventually revealed to have been the mastermind behind the theft, Luke is the true antagonist of the film. He is portrayed by Jake Abel.
There have been some changes to his character, one of the most notable being that Luke claims he has never met his father, despite the fact that in the book series their only meeting has a profound effect on their relationship and the way Luke views the Olympians. The relationship between Annabeth and Luke, which plays a key role in The Titan's Curse and especially in The Last Olympian, is not as close as their book counterparts, seeming to be only acquaintances rather than lifelong friends; Luke's back-story is also cut. Luke's scar was inflicted by Percy rather than Ladon, the dragon in the Hesperides garden. Finally, there was no mention of Luke's association with Kronos, heavily implying that Luke acted alone. It remains unclear if there has been any contact between the two at all.
Luke's cabin was also filled with modern-world paraphernalia and he is seen playing Call of Duty: Modern Warfare 2, using a L86 LSW (with red dot) on the map Favela online. He apparently supplies his fellow campers with modern technology.
Luke's role remains mostly the same throughout the movie, however Luke and Percy's final confrontation has changed. Upon discovering that Luke is the Lightning Thief in the Underworld, they confront each other atop the Empire State Building. The two battle, with Luke gaining his scar and the Master Bolt changing hands several times until Luke seemingly has Percy defeated. When he questions whether or not Percy truly is the son of Poseidon, Percy uses the contents of several water towers and knocks Luke off the building and into the nearby ocean, leaving his fate unknown.
The Sea of Monsters
Luke in Percy Jackson: Sea of Monsters.
Luke returns as the primary antagonist of the film, with Jake Abel reprising his role. He also appears in the film's opening scene- Thalia's sacrifice and subsequent transformation into a tree- played by Samuel Braun.
As in the novel, he poisons Thalia's tree, but he also leads two Colchis bulls into Camp Half-Blood. Following the bulls' destruction, he encounters Percy near the Big House and informs the latter of his plan to revive Kronos.
Later, as Percy meets the Oracle, he learns that he (the son of the sea) will grapple with Luke (the Lightning Thief) for the Golden Fleece.
Luke later abducts Grover with Chris Rodriguez's help in Washington, DC. He also meets up with Percy, Annabeth, and Tyson on his yacht, the Andromeda, detailing his plan, and proceeds to imprison the three. The heroes escape the next day, despite Luke's efforts to stop them.
The heroes, now with Clarisse, obtain the Fleece and Grover, but Luke swipes the Fleece away (seemingly killing Tyson in the process) and proceeds to restrain them while reviving Kronos. However, the group escape and an all-out war erupts between them and Luke's army. Whilst Clarisse, Grover and Annabeth battle the other Demigods and monsters, Percy tries to remove the Fleece, but Luke appears and the two Demigods fight.
Despite Percy carrying a sword, Luke effortlessly disarms and overpowers him with a combination of martial-arts moves. He then comes close to killing Percy, but Tyson appears and overpowers him - having survived his fall due to his Demigod traits. When Kronos is revived, Luke greets his master, but is eaten by the massive Titan.
After Kronos is defeated, Luke is ejected into Polyphemus' lair and is cornered by the Cyclops, about to be eaten. It is unknown if Luke survived, but it is highly likely.
Video Game
In the video game, Luke is one of the main characters until the player has defeated Hades. His attacks are mostly poison-based, unlike the books where he fights more with his sword. The others being Isaac and Grover, he is one of the three characters that can grant Haste to a party member. He is resistant to Poison. He is also the final boss in the game where he is fought alone by Percy.
Trivia
- In The Lightning Thief, Percy mentions that Luke's scar was under his right eye. However in Luke's official portrait, it is located under his left eye. Additionally, even though Luke's eyes are blue as himself and gold as Kronos, in his official portrait his eyes are brown.
- In The Sea of Monsters, Luke claimed that he poisoned Thalia's tree with elder python venom, "straight from the depths of Tartarus." However, how Luke obtained this venom without going down into Tartarus itself is unknown.
- He is Hermes's favorite son, though this is only discovered in The Last Olympian.
- According to May Castellan, his mother, peanut butter & jelly sandwiches, Kool-Aid and chocolate chip cookies were Luke's favorite things to have for lunch.
- His surname "Castellan" means a governor or warden of a castle, it also means "someone who guards the castle". Interestingly, he was the head counsellor of the Hermes Cabin, which would also take in all new campers. He was also the one who saved Olympus from destruction.
- The Diary of Luke Castellan is in his point of view.
- In the The Diary of Luke Castellan, it is revealed that Halcyon Green had made a 14-year-old Luke promise that he would learn from his mistakes, something Luke misunderstood to mean not to be pushed around by the gods. Thus, Halcyon was the first one to inspire Luke to question the gods. He was also the one who saw fire and a betrayal in Luke's future.
- One of the main reasons why he sided with Kronos was that he couldn't get over the gods' treatment of their children; such as Hermes abandoning him, Apollo cursing his son, Halcyon Green, and Zeus not saving Thalia.
- Octavian bore a striking resemblance to Luke, which caused Percy Jackson to think he knew him.
- Luke was the last known person to die in the Second Titan War.
- Even though Luke dies in The Last Olympian, he has been mentioned in every book of The Heroes of Olympus up to date.
- Luke is also very similar to Michel Desjardins in The Kane Chronicles: they both were initially quite cruel towards the main characters, but make peace with them before they die a hero's death in order to stop the main villain (Kronos and Apophis respectively). Luke, however, was much more malevolent from the beginning, since he sided with Kronos, while Desjardins always fought against Apophis.
- Much like Meg McCaffrey, Luke is revealed to be a double agent of the series' main antagonist (Nero and Kronos respectively) near the end of the first book in one of the Camp Half-Blood series (The Lightning Thief and The Hidden Oracle respectively), though it should be noted that unlike Luke, Meg was shown to be quite apologetic and hesitant when it came to her true allegiance.
- Luke and Percy are alike in several ways:
- They are both excellent sword fighters.
- At some point they were both in Hermes' Cabin.
- Both of their mothers can see through the Mist.
- Both of them have bathed in the River Styx.
- Both of them saw Annabeth while bathing in the River Styx (For Luke, he also saw Thalia).
- Both of them are their father's favorite sons.
- Both of them have met Ladon the guardian dragon.
- Both of them are subjects of the First Great Prophecy.
- Both of them held the weight of the sky, and escaped. This resulted in a streak of grey hair for both of them.
- Annabeth Chase was interested romantically in both of them at one point in time.
- They were both possessed by a figure from Greek mythology, turning their eyes gold (Kronos, eidolon).
- In the books, Luke's scar is caused by a dragon, while in the movie, it is caused during the fight against Percy at the end of the movie.
- Luke's father, Hermes, is known as the god of thieves. Coincidentally, Luke was the one who stole Zeus' Master Bolt and Hades' Helm of Darkness in The Lightning Thief.
- Luke is similar to Jason Grace in several ways:
- They are both accomplished swordsmen.
- They both have a scar on their face (Luke's diagonally across his face, Jason's on his lip)
- They were both possessed by a figure from Greek mythology, turning their blue eyes gold (Kronos, eidolon).
- They are both considered physically attractive and charismatic.
- They both have blond hair and blue eyes, albeit with a slightly different build.
- They both have a history with Thalia Grace - Luke was her oldest friend, and Jason is her long-lost brother.
- They both are repeatedly compared to Percy Jackson.
- They both wielded a blade given to them by a deity (Backbiter, Juno's gladius).
- They both destroyed a Titan (Kronos, Krios).
- Both of their mothers were unstable - May Castellan was turned insane when she tried to become the Oracle of Delphi, and Beryl Grace was unable to handle Zeus/Jupiter leaving her.
- They both led an attack on a deity's throne room - Luke (while being controlled by Kronos) led an attack on Mount Olympus, and Jason led an attack on Mount Othrys simultaneously.
- Luke's paternal grandmother, Maia, is thought to be the namesake for the month of May. Ironically, that is Luke's own mother's name.
- Luke shares a few similarities with Khione:
- They both hate their respective fathers (Hermes, Boreas)
- They both appeared to be on friendly terms with the main character(s), only to try and kill them later and reveal they were working with the enemy.
- They were both very close in command to their masters. (Luke was Kronos' second-in-command aside from Kronos' brothers, the Titans, while Khione appears to be second-in-command to Gaea, next to her children, the Giants.)
- They both disappeared at the end of the first book in their respective series; Luke in The Lightning Thief and Khione in The Lost Hero, leaving their ultimate fates unknown, although Luke's fate was much more obvious. Also, the last words they spoke before disappearing were very similar. However, Luke appeared in every book of the main series after his disappearance whereas Khione only appeared later during The House of Hades.
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