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