Wonder Girl
From superman.nu: Supermanica
Earth 1's Wonder Girl was an orphan who was rescued from a fire by Wonder Woman and raised on Paradise Island by Queen Hippolyta as her own. She was given Amazon powers from a Purple Healing Ray, and when she became a teenager, decided to go to America and help her big sister fight crime. She was a member of the Teen Titans.
Later after 1985's "Crisis on Infinte Earths" series, her origin took may directions.