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