Riordan Wiki

This article is about Bobby Chase, Annabeth Chase's half-brother. For other uses of the name Bobby, see Bobby (disambiguation).

Bobby Chase is the younger mortal half-brother of Annabeth Chase. His parents are Frederick Chase and Mrs. Chase. He is the twin brother of Matthew Chase.


Bobby Chase and his twin brother, Matthew, are Annabeth's half-brothers as they are the sons of her father, Frederick Chase who remarried to Mrs. Chase, Annabeth's stepmother sometime before The Lightning Thief.

Percy Jackson and the Olympians

The Lightning Thief

Bobby is seen on Half-Blood Hill waiting for his half-sister.

The Titan's Curse

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

Heroes of Olympus

The Mark of Athena

When his half-sister is recalling being attacked by spiders during her childhood, his mother mentions that Annabeth is going to wake him and Matthew.


Annabeth Chase, his half-sister

Frederick Chase

Although there is not much shown in The Titan's Curse about the family, it is shown that Frederick does not pay attention to Bobby and Matthew while at work. However, it is shown that Matthew and Bobby both care for their father.

Mrs. Chase

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

Annabeth Chase

Matthew's and Bobby's half-sister.

Matthew Chase

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