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