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