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