Thalia is an exceptionally brave, strong, and caring girl, though at times she can be profoundly stubborn, prideful, and assertive, much like her father Zeus. She likes to be in charge and give out orders to people and becomes very angry if they are disobeyed (normally by Percy). She also has a bit of a temper, as shown during the Capture the Flag match against the Hunters when Percy left his post, causing them to lose the game, so she shocked him with electricity, causing a fight.