Power Girl is the counterpart of and the first cousin of , of the . The infant Power Girl's parents enabled her to escape the destruction of . Although she left the planet at the same time that Superman did, her ship took much longer to reach .
Possessing superhuman strength and the ability to fly, she is a member of the and the team's first . Power Girl sports a of blond hair; wears a distinctive white, red, and blue costume; and has an aggressive fighting style. Throughout her early appearances in , Power Girl was frequently at odds with , who had a penchant for talking to her as if she were an ordinary human female rather than a superpowered Kryptonian, which she found annoying.