LavaGirl tends to have a caring, considerate nature. Of the main group (with Max and SharkBoy), she tends to be the most empathetic. Despite this, she still has a fiery temper that causes her powers to flare up.

While she tends to think things through and make plans, she can be just as impulsive as her friends. She tries to make up for anything she makes after her angry or impulsive actions.