Demon Slayer Corps: A government-unrecognized organization dedicated to exterminating demons. Tanjiro Kamado: The protagonist who joined the Corps to turn his sister back into a human after his family was slaughtered by a demon. Nezuko Kamado: Tanjiro's sister who was turned into a demon. She protects humans with a strong will and fights alongside her brother. Zenitsu Agatsuma: Tanjiro's contemporary. A user of Thunder Breathing who falls asleep under extreme fear to unleash his true power. Inosuke Hashibira: A wild boy wearing a boar's head. A user of Beast Breathing who fights recklessly with dual blades. Hashira: The nine strongest swordsmen who hold the highest rank in the Demon Slayer Corps. Giyu Tomioka: Water Breathing Shinobu Kocho: Insect Breathing Kyojuro Rengoku: Flame Breathing Tengen Uzui: Sound Breathing Muichiro Tokito: Mist Breathing Mitsuri Kanroji: Love Breathing Obanai Iguro: Serpent Breathing Sanemi Shinazugawa: Wind Breathing Gyomei Himejima: Stone Breathing Demons: Monstrous man-eaters who have been given the blood of Muzan Kibutsuji. Muzan Kibutsuji: The progenitor of all demons and the arch-nemesis who killed Tanjiro's family and turned Nezuko into a demon. Twelve Kizuki: Twelve powerful demons directly under Muzan's command. They are divided into Upper Ranks and Lower Ranks. Notable demons: Kokushibo, Doma, Akaza, Hantengu, Gyokko, Daki, Gyutaro.

Yuga Aoyama (Can't Stop Twinkling): Navel Laser Mina Ashido (Pinky): Acid Tsuyu Asui (Froppy): Frog Tenya Iida (Ingenium): Engine Ochaco Uraraka (Uravity): Zero Gravity Mashirao Ojiro (Tailman): Tail Denki Kaminari (Chargebolt): Electrification Eijiro Kirishima (Red Riot): Hardening Koji Koda (Anima): Anivoice Rikido Sato (Sugarman): Sugar Rush Mezo Shoji (Tentacole): Dupli-Arms Kyoka Jiro (Earphone Jack): Earphone Jack Hanta Sero (Cellophane): Tape Fumikage Tokoyami (Tsukuyomi): Dark Shadow Shoto Todoroki (Shoto): Half-Cold Half-Hot Toru Hagakure (Invisible Girl): Invisibility Katsuki Bakugo (Great Explosion Murder God Dynamight): Explosion Izuku Midoriya (Deku): One For All Minoru Mineta (Grape Juice): Pop Off Momo Yaoyorozu (Creati): Creation