Kara Zor-El, also known as Supergirl, is a fictional superhero appearing in DC Comics. She is the cousin of Superman and shares similar powers, including super strength, flight, and heat vision. Kara was born on the planet Krypton and was sent to Earth to protect her younger cousin, but her spacecraft was delayed, causing her to arrive years after him. Kara Zor-El first appeared in Action Comics #252 in 1959. Over the years, she has become a prominent character in the DC Universe, often depicted as a strong and independent hero. Her stories explore themes of identity, family, and the challenges of being a young superhero.