Supergirl is the name of several fictional superheroine characters appearing in American comic books published by DC Comics. The original and most well-known Supergirl is Kara Zor-El, also known as the cousin of the superhero Superman.
The character made her first appearance in Action Comics #252 (May 1959) and was created by Otto Binder and Al Plastino. More Supergirl comic books were made in 2016 as part of the DC Rebirth.[1][2]