Mrs. Chase

Mrs. Chase is the step-mother of Annabeth Chase, mortal wife of Frederick Chase and the mother of Matthew and Bobby Chase.

History
Mrs. Chase married Frederick when his daughter by Athena, Annabeth, was five and had two sons with him; Matthew and Bobby. Because her step-daughter, Annabeth, was a demigod the entire family was subjected to monster attacks. Annabeth felt her father and stepmother blamed her for this and when she was seven she ran away from home. It is very likely that Mrs. Chase had no hostile feelings for her stepdaughter and was upset by her departure.

The Lightning Thief
Annabeth tells Percy her family has rejected her and describes her stepmother as hostile, blaming Annabeth for her tendency to attract monsters with her demigod scent. However, after talking to Percy she decides to write to her father and give living at home a second chance. Mrs. Chase is seen, along with Annabeth's father and little brothers, silhouetted against the sky near Thalia's tree waiting for Annabeth to join them.

The Titan's Curse
Mrs. Chase was at home when Percy, Thalia and Zoë came seeking help. Percy, after all he had heard about them, was astonished to discover that Annabeth's father and stepmother were really quite nice and more than ready to help, not to mention worried about Annabeth herself. She bakes homemade cookies and other homemade delicacies, and keeps a comfortably untidy house which strikes Percy as a good place to live in. She is also stated to like to cook. She immediately agrees with her husband that lending them the family car is necessary to save Annabeth. As Percy is leaving she calls him back and asks him to remind Annabeth she still has a home with them. It is pretty clear that Annabeth has seriously misinterpreted her stepmother's behavior reading fear and anger at monster attacks as blame, probably because of her own feelings of guilt.

Appearance
In The Titan's Curse, Percy describes her as a pretty Asian woman with red highlighted hair tied in a bun.

Personality
Annabeth has told Percy that her stepmother dislikes her and would blame her whenever a monster attacked; acting like Annabeth endangered their lives on purpose. But in The Titan's Curse, when Mrs. Chase appears she seems to be very nice and worried about her stepdaughter. When Percy mentioned Annabeth, she told the companions to ask if she wanted to come home. It is possible that Annabeth, who was after all only seven, did not read her stepmother's reactions correctly or that Mrs. Chase regrets her behavior and would like to make it up to Annabeth.