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