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