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