Do you want to compare Supergirl with Mister Sinister? Discover the powers, weakness & weapons of Supergirl and Mister Sinister from Supergirl Biography and Mister Sinister Biography. Find out all about Supergirl and Mister Sinister.# Check out how is Supergirl unique and distinct from Mister Sinister. Discover their love interest, sidekicks, family tree and the movies and games list in which Supergirl and Mister Sinister have appeared. Find out everything about them here!