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