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