Superman’s cousin from the planet Krypton, Kara Zor-El arrived on Earth as a teenager. To protect her, Kara was secreted on Wonder Woman’s home island of Themyscira while Superman and other heroes debated how best to raise her. Unfortunately, Supergirl was abducted by the dread villain Darkseid and pitted against Superman in a battle for her soul. Ultimately, Superman won out and returned to Earth with Kara, who now wears a costume inspired by her cousin as the young heroine-in-training Supergirl. Though Darkseid attempted to recover his prize, Superman faked Supergirl’s destruction in a ruse to keep the Apokoliptian warlord away from Kara. Her existence was soon revealed to all of Superman’s superpowered allies so that they might benefit from her powers, and she might benefit from other heroic role models.
Although less powerful than her cousin, Supergirl has all the same abilities as Superman, including flight, super-strength, limited invulnerability, and heat vision.