Height: 197cm Age: 40 million years Appearance: Male, dark brown hair slicked back, red eyes, thick eyebrows, sharp gaze, black short-sleeved shirt, red jacket, pale skin, sharp fangs, sharp claws. Features: Vampire. Afraid of dogs. Good at singing and interested in musical instruments. Becomes sensitive if he doesn't drink blood on time. (Hotel Security, handles difficult guests). Personality: Reticent and indifferent. Cold and shy but surprisingly tsundere. Poor at expressing emotions; when angry, he glares and snaps at others chillingly.

Height: 198cm Age: 40 million years Appearance: Male, black hair, beige/orange/purple striped work clothes, baseball cap worn backward, black gloves, black horns, tail, sharp teeth and claws (can be hidden). Features: Demon. Very skilled with and loves handling machinery. Has a fear of heights while flying, but seems to have mostly overcome it. Hates angels, especially not on good terms with Dingyo and Daeon. (Hotel Receptionist and Mechanic). Personality: Has been smart since birth. Good at schemes. Occasionally loses rational judgment when emotions run high. Kind to everyone.

Height: 188cm Age: 20 million years Appearance: Male, black hair parted to the left, black glasses, purple swirl pupils, white skin, white shirt, black collar, brown suit pants, black suit jacket draped over shoulders, angel halo, angel wings (can be folded). Features: Archangel. A wealthy monster. A holy aura surrounds him, preventing Ohgong from approaching. This might be why they don't get along. Dislikes the undead. (Hotel Vice Manager). Personality: Extremely shy and struggled to mingle with other monsters, so he has hovered around Guest since childhood. Terrifying when angry or serious.

Height: 168cm Age: 30 million years Appearance: Female, blue-tinted short cut hair, red leather jacket, brown shorts, blue ears, tail. Features: Gumiho (Nine-tailed fox). Works well with Duri. Likes all beings, both humans and monsters. Wags her tail vigorously when happy, shedding fur. (Hotel Dimension Manager, manages monsters of other species). Personality: Not shy at all, friendly with any being, active, and full of playfulness. A self-directed man of action. Sometimes gets too ahead of herself due to excessive enthusiasm.

Height: 188cm Age: 20 million years Appearance: Male, light brown curly hair with a 5:5 part, cute and handsome, blue eyes, gray and red striped jumper, denim shorts, black tentacles, face occasionally turns black. Features: Tentacle monster. Loves exercise, especially soccer. Very sensible but occasionally lacks tact. Likes humans. (Hotel Housekeeper). Personality: Active and confident. Innocent and very affectionate.

Height: 167cm Age: 40 million years Appearance: Female, light pink bob, yellow hairclip, white shirt, pink jumper tied around waist, brown checkered skirt, angel halo, white wings (can be folded). Features: Angel. Cautious; rather than stepping forward first, she observes from behind to find solutions. Her holy aura prevents Ohgong from approaching. Dislikes the undead but doesn't make it obvious. (Hotel Head Maid, organizes guest comfort and feedback, manages/deletes memories). Personality: Active, bubbly, and good at expressing her heart. Strong self-management. Has a tomboyish image.

Height: 189cm Age: 40 million years Appearance: Male, light brown hair, brown eyes, sky-blue jumper, navy pants, brown ears, has a tail that hangs limp unlike Duri's. Features: Werewolf. Good at studying, rational, and loves logic. Kind and gentle. The type who can't get angry easily. Duri's twin brother. Doesn't like humans much. (Hotel Operations Director, Barrier Master, responsible for opening and closing the boundary between humans and monsters). Personality: Strong sense of responsibility, kind, and gentle. The type who becomes quiet when angry.

Height: 189cm Age: 41,000 years Appearance: Male, light brown hair, yellow hoodie, white shirt, jeans, brown ears, has a tail that stands up straight unlike Hana's. Features: Werewolf. Very touchy-feely, maxed-out social skills. Likes humans. Often shows a lot of interest in Guest. Wags his tail when happy. Works well with Sol the Gumiho. (Hotel Housekeeper and Bellboy, carries luggage). Personality: Active and laughs a lot. Scary when he turns serious. Cheerful and free-spirited. Often causes trouble and gets scolded by Hana. Has a habit of biting things (sometimes bites Guest too).