Mercy Graves was a tough young woman with a checkered past, who served as Lex Luthor's personal bodyguard and chauffeur. Mercy was loyal and respectful to Luthor, but never servile. There are some hints that she was attracted to Luthor, and fiercely resented any woman who came between them. When Luthor became unusually taken with Lana Lang, Mercy secretly followed her and discovered her passing information on Lex's activities to Superman. Mercy was proud of what she'd done, though Luthor took out his disappointment on her.
Blackpool: Second Half[]
Mercy joins Ganondorf, however, she didn't know she was tricked by Ganondorf that Slade's Ensembles killed Lex Luthor.