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