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