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