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