I'm sorry, sir. Emergency. I've ordered another car for you.

–Robert, in The Battle of the Labyrinth

Robert was a chauffeur in The Battle of the Labyrinth.

Percy Jackson and the Olympians

The Battle of the Labyrinth

Rachel Elizabeth Dare tells Robert who her father is in order to get a ride. After hearing this, he makes a few calls and apologizes to the person who had originally hired him, reassuring them that another limo was on the way. After Rachel, and her friends climb into the limo, he asks them where they were going and Rachel tells him to just drive around until they see what they needed. Rachel then spots an entrance to the Labyrinth and Robert lets them out.

Rachel Elizabeth Dare

Rachel Elizabeth Dare, who Robert drives for.