| M I |
| M II |
| Machine Man |
| MacTaggert, Moira |
| MacTaggert, Moira (films) |
| Madame Hydra I |
| Madame Hydra III |
| Madame Masque |
| Madame Sanctity |
| Madame Web I |
| Madame Web II |
| Maddicks, Artie |
| Maddicks, Artie (films) |
| Madison-Jameson, Marla |
| Mad Jack I |
| Mad Jack II |
| Mad Jim Jaspers |
| Madrox, Jamie (AoA) |
| Magda |
| Magdalène |
| Maggott |
| Magie I |
| Magie II |
| Magie (Ex) |
| Magique |
| Magma II |
| Magma (AoA) |
| Magnéto I |
| Magnéto III |
| Magnéto IV |
| Magnéto (films) |
| Magnus (Ex) |
| Magus II |
| Mainframe II |
| Le Maître de Jeu |
| Le Maître du Métal |
| Major Domo |
| Malabar |
| Malice III |
| Malice IV |
| Malice V |
| Malicia |
| Malicia (AoA) |
| Malicia (films) |
| Mammomax |
| Mandrill |
| Manh, Leong |
| Manh, Nga |
| Manta I |
| Manta II |
| Man-Thing |
| Mantis |
| Marilla |
| Marilou |
| Marina |
| Marko, Cain (AoA) |
| Marko, Kurt |
| Marrow |
| Martinex |
| Marvel Boy III |
| Marvel Boy IV |
| Marvel Boy V |
| Marvel Girl I |
| Marvel Girl II |
| Marvel Girl III |
| Mary Zero |
| Masque I |
| Masque II |
| Mass Master I |
| Mass Master II |
| Mastermind I |
| Mastermind III |
| Masters, Alicia |
| Match |
| Mathémanic |
| La Matrice Noire |
| Mauvais |
| Maverick I |
| Maverick II |
| Maximus |
| McCabe, Lindsay |
| Médusa |
| Mégatak |
| Meggan |
| Meld |
| Mellencamp |
| Meltdown II |
| La Meneuse de Nuées |
| Mentallo |
| Mentor II |
| Méphisto |
| Mercedes |
| Mercury IV |
| Mercury V |
| Mère Askani |
| Mère Inférieure |
| La Mère Supérieure |
| Merryweather, Irene |
| suite de la page |