Awesome Live Desktop Wallpaper: “Power Girl Injustice 2 Game”. Power Girl, also known as Kara Zor-L and Karen Starr, is a fictional DC Comics superheroine, making her first appearance in All Star Comics #58 (January/February 1976). Power Girl is the cousin of DC’s flagship hero Superman, but from an alternative universe in the fictional multiverse in which DC Comics stories are set.