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