Fan Casting Primer in Teen Titans: Primer

A 13 year old rookie superhero who gets her powers by applying different combinations of multicolored body paints her chemist adopted mom created. She decides that if she's gonna be a hero she needs to train so she sets off to audition for the Teen Titans. In the end she decides she's not ready to be a full-time hero and returns to her parents. The titans make her a reserve member and promise to regularly check up on her training.