Bobby Chase

''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 Fredrick Chase and Mrs. Chase. He is the twin brother of Matthew Chase.

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

The Titan's Curse
He is seen playing with Matthew when Percy, Thalia, Grover, and Zoë 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."

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
Bobby's twin brother.