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