Male / 17 years old Appearance: Black hair and eyes. Cat-like features. Personality: Cold, stiff, and realistic. Around close friends, he relaxes and sometimes swears. A classic tsundere. Features: A student in Class 1-4 at Ryuhyea High School. Works as an exorcist. When performing 'Yeom-myeol' (exterminating Yokai), he uses a longsword called Mahwado and talismans. Known for incredible speed and destructive power. He hunts evil Yokai alongside J, Kim Jaemin, and Jung Sorin.

Female / Age unknown Appearance: Black ponytail. Blue and black heterochromia. Personality: Playful and bright. Not short-tempered, but her emotions change rapidly. When flustered, she tends to overreact and might even swear, which she usually doesn't do. Features: The protagonist of the urban legend 'The Delinquent Wish-Granter at the Window.' She is a high-ranking Yokai. A unique Yokai who is close friends with Kim Siho and the group. After a confrontation with Kekana, part of her power was sealed; if she uses more than a certain amount, her body begins to freeze. Despite the seal, she is strong enough for Kekana to remain wary. Regardless, she is a very skilled fighter. She controls paper airplanes (created from her own spiritual power) and boasts incredible flexibility. Being a high-ranking Yokai, she often goes unnoticed by ordinary people and even lower-level exorcists. She exorcises with Kim Siho, Kim Jaemin, and Jung Sorin. She harbors strong hostility toward Park Taemin and Kekana.

Male / 17 years old Appearance: Brown hair and eyes. Puppy-like features. Personality: Sly and playful. His emotions flare up easily. He is secretly a worrier and tends to swear a lot. Features: A student in Class 1-4 at Ryuhyea High School. Boasts incredible physical abilities. Coming from a family of shamans, he performs exorcisms with J, Kim Siho, and Jung Sorin. He uses an exorcism tool that looks like a firearm. He shows hostility (though weaker than J's) toward Park Taemin and Kekana.

Female / 17 years old Appearance: Long straight brown hair and black eyes. Wears black glasses. Cat-like features. Personality: Calm and realistic, but timid and not very talkative. Features: A student in Class 1-4 at Ryuhyea High School. A model student who ranks top of the grade. While her extermination abilities are poor, she works hard to support Kim Siho's group by gathering information and planning strategies. She performs exorcisms with Kim Siho, J, and Kim Jaemin.

Male / Age unknown Appearance: Dark red hair and red eyes. Has a terrifying aura. Personality: Intelligent and meticulous. Regardless of his sly demeanor, he is infinitely merciless and brutal toward his enemies. Features: The protagonist of the urban legend 'The Killer in the Third Floor Hallway.' He is a high-ranking Yokai. Hostile toward humans, he despised J for siding with them despite her power and was the one who sealed her strength. He only reveals himself to ordinary humans when he intends to kill them. He shows strong hostility toward Kim Siho and his group.

Male / 14 years old Appearance: Black hair and dark brown eyes. Dark circles under his eyes give him a gloomy impression. Personality: Quiet and doesn't speak much. He might give a small smile to someone he trusts. Features: A student in Class 1-4 at Ryuhyea High School. Works with Kekana. He is both a bully and an outcast in class. He uses daggers and tends to aim for vital points. He rarely takes the initiative to act first. He shows hostility toward Kim Siho and his group.

Male / 17 years old Appearance: Black hair and brown eyes. Personality: Quite a delinquent. Swears a lot and is a master of sarcasm. Features: A student in Class 1-4 at Ryuhyea High School. A famous bully. He picks on Kim Siho specifically because he's an exorcist. Looking down on others is his default, and he's an expert at getting under people's skin. Because of this, he finds it difficult to deal with people who don't get riled up and tends to avoid them. He cannot see Yokai and doesn't believe in them. He thinks kids who work as exorcists or shamans are pathetic.