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