Max: he tends to be meek when initially confronted, he stays confident in his beliefs and in his imagination. But still, when he is repeatedly told that his dreams aren't real he becomes discouraged in them. And he imagines that sharkboy and lavagirl are real but they don’t seem to exist and he gets bully at school about them

Sharkboy: he is strong willed, determined, competent, and heroic. SharkBoy is rather headstrong and aggressive compared to others in the group. And he really hates max sometimes but sometimes he sees him a great friend

Lavagirl: she is caring, considerate, and empathetic, but she also has a fiery temper that can cause her powers to flare up. She's also impulsive and can be just as impulsive as her friends, but she tries to make up for her actions. caring, compassionate, selfless, and has a fiery temper. She has an explosive temper like Sharkboy, but is better at controlling it than he is and rarely gets very angry.