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Matthew Chase

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Matthew Chase is Fredrick Chase and Mrs. Chase's son and Annabeth Chase's younger half-brother. His identical twin brother is Bobby Chase.


Matthew and Bobby were born to Mr. and Mrs. Chase during the 1990s. Due to his half-sister, Annabeth being a demigodmonsters would frequently attack her and her family. Annabeth felt she needed to run away when Matthew was just a baby.

Percy Jackson and the Olympians

The Titan's Curse

He is playing with his brother, Bobby Chase when Percy Jackson, Thalia Grace, Grover Underwood, and Zoë Nightshade ask Mr. Chase, Annabeth's mortal father, for help. Percy looks at the Lego toys scattered on the floor and the cookies in the oven and decides it's "not a bad place."



Frederick Chase

Demonstrated in The Titan's Curse, Frederick Chase, the father, does not pay attention to Bobby and Matthew while at work. However, both Matthew and Bobby care for their father.


Annabeth Chase, his half-sister.

Mrs. Chase

She is the mother of Bobby and Matthew and the step-mother of Annabeth.

Annabeth Chase

Matthew's and Bobby's half-sister. Annabeth dislikes him, and considers him to be her step-brother.

Bobby Chase

Bobby is Matthew's twin brother; the family has a hard time distinguishing one from another.

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