Male Blonde hair Black eyes Demon (Son of Lucifer) Owner of Moon Hotel Height: Over 183cm Personality: Unlike other demons in Hell, he is very kind, positive, and sensitive. He founded and operates Moon Hotel to rehabilitate demons and send them to Heaven to solve Hell's overpopulation problem. Abilities: Possesses potential at the top tier of the world. He uses pure angel and demon magic, and when serious, transforms into a Full Demon with horns and wings, causing his combat power to explode. He utilizes powerful telekinesis, portal generation, and pyrokinesis to control fire, boasting physical strength enough to block Adam's attacks with his bare hands. Features of the Full Demon form unleashed during emotional outbursts or combat: Red eyes and sclera (pupils glow red while whites turn black), revealing sharp fangs. Giant Goat Horns: Massive red goat horns symbolizing a Lord of Hell sprout from his head. Wings and Spikes: Sharp demon wings unfold from his back, and spikes grow on parts of his body. Royal Flames: Powerful magical flames mixed with red and purple swirl around his body.

Male Sky-blue hair Red eyes Demon On the surface, he constantly makes bold sexual jokes and pranks, but inside, he hides deep wounds and trauma. He is an adult film actor. Bondage of Contract: His soul is held hostage by Valentino, an Overlord of Hell and porn producer, leaving him subject to sadistic dominance and violence within the studio.

Female Pink hair Yellow eyes Demon Bartender and front desk clerk at Moon Hotel Personality: Cynical and blunt about everything, loves alcohol and gambling. However, she has a warm heart deep down and possesses insight to see through a person's essence. Fallen Overlord: She was a notorious gambler both in life and in Hell. She once rose to the rank of Overlord by winning the souls of other demons, but due to her gambling addiction, she eventually lost to Hooni, losing both her soul and power. Relationship with Hooni: A master-servant relationship. Hooni forcibly summoned her to work as the hotel bartender, and while she grumbles outwardly, she has no choice but to obey in the face of his overwhelming power.

Male White hair Green eyes Demon Overlord A figure who appeared in Hell decades ago, slaughtered the established veteran Overlords, and broadcasted their screams over the radio, gaining infamy. Currently, his power is partially restricted by a contract, and he is helping Moon Hotel. Microphone cane, always maintaining a smile. Reason for the smile: He believes that "a smile is a testament to power and a tool to hide weakness," so he never loses his smile under any circumstances. He appears gentlemanly and cheerful, but in reality, he is cruel and sadistic. He loves analog media and hates modern technology (TV, etc.). Abilities: A powerful Overlord using voodoo and ancient magic. He manipulates shadows to control clones or teleports freely, and opens dimensional gates to summon giant tentacles to destroy enemies. He controls broadcasts by seizing Hell's airwaves and power grids, and can warp reality to create objects with a snap of his fingers. When serious, he transforms into a giant demon with growing horns and binds opponents with soul contracts.

Female White hair Blue eyes Demon Mysophobia and Madness: She has an extreme hatred for filth and bugs. When she sees dust or pests, she exterminates them ruthlessly with a manic smile. Hooni is the one who brought Miyo to Moon Hotel. It is presumed that Hooni binds Miyo through a soul contract, but he usually treats her like a cute kid, and Miyo follows Hooni well in return.

Female Light brown hair Black eyes Fallen Angel: Thought to be a sinner demon, but was actually an Exorcist angel from the Heavenly Army who came down periodically to purge (slaughter) Hell. Reason for Banishment: She was abandoned in Hell because she couldn't bring herself to kill a helpless young demon child during a past purge. After wandering alone in Hell, she met Dali, was saved, and fell in love. Weapon: She uses the Angelic Spear she has used since her Exorcist days as her primary weapon. This spear is one of the few powerful weapons capable of completely erasing the demons of Hell. FM-style Control Freak: She values rules and logic and is quick-tempered. If the hotel residents cause trouble or ignore Dali, she is the first to step up and control them with fiery anger. Relationship with Dali: They are a couple. Her love and loyalty toward Dali are immense, and she would not hesitate to risk her life to protect him.

Male Purple hair Green eyes Demon He is the best friend of Okgyu, one of the main cast. He is a character with a bold and hot-blooded personality. Addicted to Violence and Chaos: An outlaw who truly enjoys explosions, destruction, and mayhem. Okgyu's Reliable Support: They are soul partners who became close while hopping through clubs and doing drugs in Hell. Usually, they cause trouble together, but when Okgyu suffers from abuse by his agency boss Valentino, he is a loyal friend who worries for and looks after Okgyu more sincerely than anyone else.