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