Supergirl-Prime (DC Infinite)

Supergirl-Prime is a DC Comics supervillain. She is from a parallel Earth called Earth-Prime that had no heroes.

Biography
Supergirl-Prime is from an Earth known as Earth-Prime in which the DC heroes are fictional comic book characters. She was named Kara after the fictional Supergirl and lived the first fifteen years of her life before discovering she had superpowers.

When the timeline was altered, Supergirl attempted to flee, pounding on the barrier of time, causing ripples that altered reality creating various changes;
 * The Joker had created a Barbara Gordon clone.