Mercy Graves is a fictional character from the DC Comics universe, primarily associated with the superhero Superman. She first appeared in the animated series "Superman: The Animated Series" in the 1990s and later became a part of the comic book lore. Mercy is known for being a loyal bodyguard and assistant to the villain Lex Luthor, showcasing her combat skills and intelligence. In the comics, Mercy is often depicted as a tough and resourceful character, frequently engaging in physical confrontations. Her character has appeared in various adaptations, including television shows and films, where she is portrayed as a formidable adversary to Superman and his allies.