Moxxie Knolastname (Helluva Boss)
Millie Knolastname (Helluva Boss)
Metal Alice (Power Rangers Megaforce)
Metal Alice of the Agent (Super Sentai [Goseiger])
Mokumokuren (Super Sentai [Kakuranger])
Major Skull (Kamen Rider Skull)
Muzan Kibutsuji (Demon Slayer)
Medicine Melancholy (Touhou)