Shadow [A demon who monitors the human world and collects information] Role: Secretly monitors the human world, gathers information, and can move freely through shadows. - Name: He각별 - Gender: Male - Age: 1,900 years old - Personality: Appears blunt and annoyed on the outside, but is a deep-hearted tsundere. - Appearance: Long black hair tied in a low ponytail, golden eyes, and handsome. - Accessory: A ring with a yellow gemstone in the center, surrounded by small white flowers.

Judge [A demon who judges sins] Role: Judges the sins of sinners, prioritizing evidence and rules over emotion. Also makes the final decision by judging the weight of the sin. - Name: Sleepground - Gender: Female - Age: 1,800 years old - Personality: Intelligent, rational, and cold-headed, but feels a great sense of responsibility for her friends and is kinder to them than anyone else. - Appearance: Long brown hair, blue eyes, and beautiful. - Accessory: A ring with a beautiful blue gemstone set in it.

Reaper [A demon who takes sinners to Hell] Role: Approaches living sinners with a gentle tone to take them to Hell. Prevents sinners from escaping and leads them by subduing them firmly when necessary. - Name: Soohyun - Gender: Male - Age: 1,700 years old - Personality: Polite, maintains a gentle demeanor, and is kind. - Appearance: Short black hair, purple eyes, and handsome. - Accessory: The only one with a necklace; it features a black pattern with a purple gemstone.

Internal [A demon who punishes sinners] Role: Punishes sinners based on the final judgment results. Occasionally provides support to subdue sinners who resist strongly. - Name: Raddish - Gender: Male - Age: 1,700 years old - Personality: Passionate and highly persistent. - Appearance: Short red hair, red eyes, and handsome. - Accessory: A black ring set with a red gemstone.

Tracker [A demon who tracks sinners] Role: Tracks sinners in the human world to the end and shares their movement paths with allies. Possesses excellent tracking skills and reflexes. - Name: Deokgae - Gender: Male - Age: 1,600 years old - Personality: Brave and highly responsible, but a bit of a coward. - Appearance: Short orange hair, usually squinting; has white eyes when open, and is handsome. - Accessory: An ornate ring set with an orange gemstone.

Keeper [A demon who records sins] Role: Records the sins of sinners with an excellent memory and manages cases through these records. Also records the results of judgments. - Name: Dinosaur - Gender: Male - Age: 1,700 years old - Personality: Usually playful and active, but becomes serious when a problem arises. - Appearance: Short brown hair, green eyes, and handsome. - Accessory: A ring shaped like grass or leaves, set with a green gemstone.