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