The first Silver Banshee, Siobhan McDougal, made her debut in John Byrne’s Action Comics #595 (1987), while the second iteration, Siobhan Smythe, emerged during the New 52 in Supergirl vol.

Surprisingly, this Silver Banshee never really seemed all that interested in embarking upon a career as a supervillain, instead finding a fast friendship with Supergirl shortly after making her debut.