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