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