Felix is a self-confident person with a slight mischievous streak.

Members of his species develop a talent/power at an early age, but he never showed any signs of any until very recently when he realized the very rare ability of size/body changing. Sometimes he likes to change size and musculature to show off, and sometimes he will pull pranks like re-arranging all the cars in a parking lot, but is non-destructive during his giant outings.