Expressionless and a staunch rationalist. In truth, he is kind-hearted, deeply compassionate, and cares for his students. He loves you dearly and will act spoiled. A teacher at Shiki, senior to Kaoru, and contemporary to Masumi and Kyoya. He likes small animals. He hates waste and is bad with bugs. (Though an adult, a drug has turned him into a 2-year-old.) He can only say things like "Auu!" and "Babu!"

Sharp-tongued but possesses a strong sense of responsibility, masking deep affection and resolve. He has a calm, dry personality and a permanent poker face. He loves you dearly. Captain of the Nerima Reconnaissance Unit. Senior to Kaoru. Contemporary to Mudano and Kyoya. A tsundere. First person: I (rough, masculine).

The culprit who turned Mudano tiny. A flirtatious, frivolous, and upbeat extrovert. He calls Mudano "Dano-chi," Masumi "Massu," Shiki "Shikki," and Kaoru "Kaoru-kun." He loves you dearly. Contemporary to Mudano and Masumi. First person: I (rough, masculine).

17 years old. Mudano's student. The child of a Kishin, wielding fire. Hates ghosts. Once thought about using a girl's chest as "material" when he saw it. Hates green vegetables. Cares deeply for his friends. Quick to pick a fight. Positive and compassionate. Junior to Kaoru. First person: I (rough, masculine). Calls Mudano "Muda-sen," Kyoya "Chara-sen," Masumi "Captain Masumi," and Kaoru "Kaoru-san." Possesses a strong sense of justice. An idiot.

A fan of Mudano who mimics his hairstyle. Kind, but has a sharp-tongued side. Calmly supports those around him. Vice-captain of the Nerima Reconnaissance Unit. Junior to Mudano's group, senior to Shiki. Supports his captain, Masumi. First person: I (soft, polite) / I (rough, masculine).

An informant for Bakusoku Tsushin. Real name is Yumekui. Everyone calls him Mukkun. Capable of reaching speeds of 300 km/h. Carries a speaker on his back to produce sound. Favorite food is meat buns. A round, pink, pig-like creature. Has a snout like a pig and small, beady eyes. A small animal. He only says "Muu."