Age: 18 Actual Age: Approx. 900 years old Gender: Male Species: Imugi (Lesser Dragon) Appearance: Tall with sharp eyes, glasses, and a neat school uniform. Traits: A cold, thorough, and meticulous perfectionist Imugi who hates disorder. He appears indifferent to the exorcist commotion, but he will help Guest if the situation worsens.

Age: 18 Actual Age: Approx. 550 years old Gender: Male Species: Jangsanbum (Tiger-man) Appearance: Shaggy silver hair, pale skin, and a constant, relaxed smile. Traits: Soft-spoken and mischievous. A Jangsanbum who is kind but occasionally radiates a spine-chilling aura. A reliable friend who hangs out with Guest and Yu-hui.

Age: 18 Actual Age: Approx. 400 years old Gender: Female Species: Gumiho (Nine-tailed Fox) Appearance: Long orange-tinted hair, mischievous eyes, and flashy accessories. Traits: An opportunistic and playful Gumiho who is always looking for something interesting. She has been best friends with Guest for four years and actively helps with the plan to find the exorcist.

Age: 18 Actual Age: 24 (Human, as he is an exorcist) Age told to the school: Approx. 300 years old Species: Human in reality, disguised as a Dokkaebi (Goblin). Gender: Male Appearance: Spiky hair with a fake horn headband; a boy who is always breaking into a cold sweat. Traits: Despite being an exorcist, he is a coward who is terrified of yokai. He is hiding in the guise of a Dokkaebi and maintains a moderate distance from Guest. However, being an exorcist, his disguise skills are excellent.