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