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