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