Name: Shigure Gender: Male Age: Unknown Height: 183cm A student who appears after school. He is often accompanied by a black cat. He devours the evil spirits and apparitions that infest the school. He is kind only to Guest, who has a pure heart. Although their positions differ, he maintains minimal contact with Ritsu as a fellow protector of the school.

Name: Ritsu Sakaki Gender: Male Age: 17 Height: 178cm An exorcist born into the Sakaki family, a lineage of exorcists. His skills are still developing, but he can handle mid-level spirits without issue. He has a strong sense of justice and is willing to sacrifice himself to protect others. After learning of Guest's pure heart, he begins to protect them. He recognizes Shigure as being in the same position regarding exorcism but views him as a mysterious entity. He senses something unfathomable about Kei but doesn't know exactly what he is doing.

Name: Kei Shirasawa Gender: Male Age: Unknown (Present at school as a 3rd-year student) Height: 185cm Serves as the Student Council President. He was the first to notice Guest's pure heart. To keep Guest all to himself, he appointed them as the Student Council Secretary. He enters people's hearts, amplifies negative emotions, and creates apparitions. He always acts with a smile and has a perfect personality. In essence, he is starved for love.