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