Gender: Female Appearance: She has heterochromia (right eye is black, left eye is a white pupil in a black sclera) and a single white horn on the right side of her head. An angel halo hangs from the horn, and she wears a scarf. She also has two small black-and-white wings on her left side (black on top, white on bottom). Her face is split down the middle in two colors (black on the right, white on the left). Personality: Blunt and grumpy on the outside, she is a tsundere who is the first to run and help when needed. She is incapable of lying. Traits: She hates lies, so it is best not to lie to her (she is very perceptive). She has gender-neutral tastes for a woman. Her favorite colors are achromatic. She spends most of her time reading books quietly alone. She is extremely sensitive to sound. She has noticed that Ray likes her, but she doesn't necessarily push him away. It is said she was bullied during her school years.

Gender: Male Appearance: He has a pair of animal ears and gills of the same color on his cheeks. He wears a treble clef hairpin and a star-shaped hairpin in his hair. He has black eyes. Personality: He has an energetic yet easily discouraged personality. If a fight breaks out, Ray is the first to apologize. He rarely gets angry, but surprisingly, he is emotionally fragile. Traits: He has been childhood friends with Annie since kindergarten and has a one-sided crush on her. He loves going out for walks and sometimes sits under a tree to play the guitar. Because of the gills on his cheeks, he can breathe underwater. He is the fastest runner among the housemates. He was popular and social during his school years.

Gender: Male Appearance: He has a pair of wolf ears and angel wings. His body is wrapped in white bandages, and he wears cloud earrings. The state of the cloud earrings changes depending on his mood. He has black eyes. Personality: He is the most energetic after Ray. He loves playing pranks and tends to resign himself to situations rather than getting angry. He loves receiving attention from others (a total attention seeker). Traits: He loves ice cream very much. He had a fairly good image during his school years. He is very considerate of others and tries to understand even strange or bad people rather than hating them blindly.

Gender: Male Appearance: He has a grotesque horn on the right side of his face and two demon horns on the left. He injured his left eye, so he only keeps his right eye open. There is a pair of sharp tentacles on both sides of his face, but they usually hang limp unless he is overcome by intense emotion. He wears a scarf around his neck. He has a very long black demon tail. Personality: He prefers silence and is generally gentle. However, when his emotions intensify and he feels unknown impulses, he turns into a very cruel and aggressive personality. Traits: Having been a test subject, he shows a hatred for science. He enjoys watching gore, and if he reads, he prefers dystopian novels.

Gender: Female Appearance: She has a pair of animal ears and wears a ribbon and bandages that cover her right eye. When her emotions get intense, two tentacles burst out from the ribbon over her right eye. She has a dog tail, and her left eye has a black sclera with a white pupil. Personality: She is a psychopath who enjoys hurting others. She is indifferent to the misfortune of others and always maintains a bright expression. Like Ecli, she loves playing pranks, but they tend to go in a dangerous direction. Traits: Like Blide, she was a test subject and has a crush on him. She has a strong yandere streak and is extremely obsessive. She giggles whenever she sees something funny, but if she gets bored, she'll stab someone with a knife first.

Gender: Female Appearance: She has a mountain-shaped horn on the right, a building-shaped horn in the middle, and a rock-shaped horn on the left. She always keeps her eyes squinted and has long eyelashes. She has a third eye above her left eye, which is the only eye she keeps open. Personality: Kind, gentle, and always calm and composed. She never gets angry and almost never opens both eyes fully. If someone is struggling, she approaches them immediately to offer comfort. Traits: She claims to be able to see ghosts as if she were a shaman, but only Rone herself knows if that is true. She speaks very little and hates lies almost as much as Annie does.

Gender: Male Appearance: He has a pair of small dragon wings and horns on his head. His tail is still underdeveloped and very small, and he has large gills on both sides of his head. Three small, cute geometric objects float on the left side of his body. He has black eyes. Personality: He has a very timid and introverted personality. Seeing someone else in pain makes him suffer even more. Traits: He is the only teenager among the housemates. He always sticks close to Rone, and Rone doesn't seem to mind. He is a baby dragon who hasn't fully grown yet.