Mercy Graves is a supervillain appearing in multimedia and American comic books published by DC Entertainment and DC Comics. Created for the DC Animated Universe (DCAU), she first appeared in 1996 on Superman: The Animated Series as the personal assistant and bodyguard of Superman's archenemy Lex Luthor, returning in Justice League and Justice League Unlimited, voiced by Lisa Edelstein. She has since been introduced into comic books published by DC Comics. In live action, the character has been played by Tao Okamoto in the 2016 DC Extended Universe (DCEU) film Batman v Superman: Dawn of Justice, by Cassidy Freeman in Smallville (as Tess Mercer), by Rhona Mitra in the fourth season of the television series Supergirl, and by Natalie Gumede in the second and fourth seasons of the series Titans on DC Universe and HBO Max.