Mikoto Sano: A god of pestilence. Sadistic and sharp-tongued. Best friends with Mamekichi. First person: I (俺, casual). (No guardian present) Mamekichi Mamezuka: A bean tanuki. Can switch between human-sized and mini-form. Being an animal yokai, he's a bit of an airhead. Best friends with Sano. Everyone calls him Mame. Rensuke Nyudo: A hitotsume-nyudo (one-eyed). Known for his sharp retorts. Has a crush on Kuniko. Class representative. Best friends with Tamao. The boys call him Ren-ren. Tamao Akisame: A nekomata. Can switch between human-sized and mini-form. An airhead animal yokai. Best friends with Rensuke. Everyone calls him Tama. Kotaro Dorota: A dorotabo (mud yokai). Childhood friends with Beniko. Energetic and a jokester. Has a flirtatious side. Affectionately called Dorotan by Mamekichi and Tamao. Yakumo Mujina: A noppera-bo (faceless). Usually has a face but can make it disappear. Speaks like a delinquent. Has an afro. Touya Fuji: A yuki-onna (snow woman). A cross-dressing boy. Sadistic. Best friends with Saguru. Speaks like a delinquent. Wears hair extensions. Very handsome. Saguru Kogoso: An amanojaku. A popular idol who hides his face with a cloth to avoid being recognized. Only Fuji and Haruaki know his true face. Timid. Best friends with Fuji. Very handsome. Yagoro Ota: A daidarabotchi. Can change between normal size and giant size. Dating Akibe. Yasutomi Maeda: A mermaid. Can manifest legs but cannot walk. Gentlemanly. Yuta Kurahashi: A kudan. Wears glasses but is actually not very bright. Best friends with Fujihira. Member of the basketball club. (No guardian present) Yamato Fujihira: An uwabami (giant snake). Sometimes takes the form of a snake. Best friends with Kurahashi. Member of the basketball club. Hikaru Ogata: Raijin (thunder god). Likes lewd things. Twin brother of Rin. (No guardian present) Rin Ogata: Fujin (wind god). Likes lewd things. Twin sister of Hikaru. (No guardian present) Yanagida: An ittan-momen. Usually looks like a piece of cloth with a face. Can fly. Childhood friends with Natsumi. Makes strange medicines. Odawara: A chochin-kozo (lantern boy). Has a lantern for a head and a human body. Can extinguish lights. (No guardian present)

Kuniko Utagawa: A gashadokuro (giant skeleton), but has a proper physical body. Class representative. Has a crush on Nyudo. Very maiden-like. Natsumi Momoyama: A futakuchi-onna (two-mouthed woman). The front mouth is timid, but the back mouth is foul-mouthed. Childhood friends with Yanagida. Has a crush on Sano. Beniko Zashiki: A zashiki-warashi. Tomboyish. Childhood friends with Kotaro. A hardcore gamer. Speaks like a delinquent. Yuri Renjo: A jorogumo (spider woman). Has eight arms and is very dexterous. Likes Kuniko. Hates Nyudo. Satsukihime: A takiyasha-hime. An eccentric girl. Has a unique way of speaking, ending sentences with "...desu no?" and "...desu." Clashes with Kuniko because she animates skeletons. Akibe: A koropokkuru. Dating Ota. 15cm tall. Marilyn: A Marin-no-ke (hair yokai). Best friends with Daisy and always together. (No guardian present) Daisy: A kasa-obake (umbrella boy). Best friends with Marilyn and always together. (No guardian present) Koizumi: A rokurokubi (long-necked woman). Has a gyu-like vibe.

Haruaki Abe: Homeroom teacher. Human. The reincarnation of Abe no Seimei. A wimp who loves sailor uniforms. Son of a shrine family and can use exorcism powers. Isaburo Ebisu: Assistant homeroom teacher. A god of fortune. Has a brother complex (though he won't admit it). Sano's older brother. Always has a beaming smile, but you never know what he's thinking behind it. Akira Takahashi: A dodomeki. Temporary school nurse at Hyakki Academy. A legendary figure who established yokai hospitals nationwide. A mad scientist and psychopath with intense intellectual curiosity. Often wants to dissect people. Older brother of An Takahashi; he doesn't realize An hates him.

Haruaki Abe's Guardians: Ameaki Abe: Haruaki's older brother. Extreme brother complex. Works at the family shrine. Abe Mama: Haruaki's mother. Works at the shrine. Very gentle. Abe Papa: Haruaki's father. Works at the shrine. Very gentle. Mamekichi Mamezuka's Guardians: Mamezuka Papa: A bean tanuki. Actually the head of the Shikoku Tanuki Alliance "Ponpokopon-gumi" (yakuza). Hiding it because police are present. Frequently hospitalized after his wife catches him visiting hostess clubs in Kyoto. Beans: A bean tanuki. The youngest sister (3 years old). Has a harsh personality (except toward family and Haruaki), making her the heir apparent. Considers herself engaged to Haruaki (at least in the Mamezuka family's eyes). Tanukihara: Likely a bean tanuki. One of the family servants who constantly protects Beans. Usually silent. Beans once asked him, "Wait, you can talk?" Rensuke Nyudo's Guardians: Hajime Nyudo: A hitotsume-nyudo. Head of the Yokai Ministry and likely the highest-ranking yokai. Serious and busy with work, rarely home. A clumsy, doting parent who doesn't show his feelings on his face. Mekurabe: A mekurabe (skull yokai). A perverted maid. Childhood friends with An. An Takahashi: A dodomeki. A servant. Akira's younger brother. Hates Akira to death and hasn't made eye contact with him since turning 20. Beniko Zashiki's Guardians: Matsu-san: Full of energy. Take-san: Likely the one who taught Kotaro about lewd things. Ume-san: Probably the most sensible one. Has squinty eyes and a calm demeanor. All three are human; Beniko was born spontaneously from their house while they were doing renovations, so they are all her fathers. Kuniko Utagawa's Guardian: Akira Takahashi: Also a teacher. He took in Kuniko when she was just a gashadokuro soul, created a body for her, and raised her. She is like his adopted daughter. Makoto Yamazaki: A doppelganger and police officer. Akira's best friend who taught him about ethics. Very serious. Kotaro Dorota's Guardians: Dorota's Sister: A dorotabo. Had her wedding in Hawaii. Quick to anger? Dorota's Brother-in-law: Her husband. Human. Had their wedding in Hawaii. Very mild-mannered. Yuri Renjo's Guardian: Renjo Mama: A jorogumo? Appears as a giant spider and lacks human reasoning. Fujihira's Guardian: Fujihira Papa: An uwabami. Lacks reasoning and is dangerous because he eats spiders. Yagoro Ota's Guardian: Ota Mama: A daidarabotchi. Very mild-mannered. Yanagida's Guardians: Papa-gida: Ittan-nylon (ittan-momen). Once destroyed an entire island. Often seen smoking a pipe. Mama-gida: Ittan-wool. Apparently hasn't destroyed anything specific. Ani-gida (Older Brother): Ittan-paper. Once completely destroyed a school building. A mechanical otaku. Same age and class as Izuna and Miki. Ototo-gida (Younger Brother): Ittan-cardboard. Interested in tanks and guns. According to Yanagida, he's a future terrorist.