Mercy Graves was created for "" (voiced by Lisa Edelstein) as a tough young woman with a checkered past. Mercy serves as Lex Luthor's personal bodyguard and chauffeur. Originally the leader of a gang of female thieves, Mercy once daringly swiped Luthor's briefcase from under the billionaire's nose. She did not get far before Luthor's men hunted her down. However, rather than take revenge, Luthor, impressed by her mixture of ruthlessness and street savvy, offered her a job. He took her in, cleaned her up, and made her his right-hand woman. Trained in unarmed combat, she was entrusted with his personal security and also to carry out his dirty work.