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