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