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