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