As a comics character, DC's Supergirl is a pretty simple pitch - she's Superman's cousin, with the same Kryptonian powers and an even bigger helping of trauma from seeing her homeworld destroyed.
Over the years,Supergirlhas faceda wide range of strong villains. Most of the villains were either aliens or metahumans, as non-powered beings posed very little threat to the Girl of Steel. Lex Luthor ...