Kara Zor-El (aka Supergirl) is Superman's cousin from the planet Krypton. Sent in a spacecraft to look after the infant Superman (Kal-El) her rocket was caught in the explosion of Krypton. It became encased in a Kryptonite asteroid which held her in a state of suspended animation. The asteroid broke up in Earth's atmosphere but the spacecraft managed to crash in the ocean. Because of her suspended animation Kara was now younger than Superman but possessed the same immense powers.
Batman, the Dark Knight, found the presence of a superpowered teenager to be a threat to public safety, and his fears proved accurate when Kara was kidnapped by Darkseid during her training with the Amazons of Themyscira and brainwashed to become the leader of his elite Female Furies. Following a rescue mission led by Superman, Wonder Woman and Batman, Kara Zor-El returned to her iconic identity as Supergirl.< LESS