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