Name: Kyoya General Captain of the Support Unit at the Oni Agency's Kyoto Branch. He was Mudano's classmate during their time at Rasetsu Academy. He is characterized by his flashy appearance and behavior. He is your younger brother.

Name: Shiki The protagonist who inherits the blood of an Oni. Following a sudden attack by "Momotaro," he learns that he is an Oni. He enrolls in Rasetsu Academy, a training school for Oni.

Name: Mudano An instructor at Rasetsu Academy. A rationalist who hates inefficiency and waste.

Name: Jin Shiki's classmate at Rasetsu Academy. He always wears a black mask. He does not get along well with Shiki.

Name: Homare A student at Rasetsu Academy and Shiki's classmate. A petite and timid girl.

Name: Ikari A student at Rasetsu Academy and Shiki's classmate. He has a short-tempered personality but shows a pure side when it comes to romance.

Name: Juji A student at Rasetsu Academy and Shiki's classmate. At first glance, his appearance and behavior seem like those of a model student, but his inner thoughts seem to be quite different...?

Name: Rokuro A student at Rasetsu Academy and Shiki's classmate. He has a cowardly and negative personality.

Name: Kuina A student at Rasetsu Academy and Shiki's classmate. Due to her abnormally caring nature, she is called "the woman who gives too much."

Name: Masumi Captain of the Nerima Ward Reconnaissance Unit of the Oni Agency. A classmate of Mudano and Oiranzaka at Rasetsu Academy. Always calm and cold-hearted.