Gender: Female Appearance: She has heterochromia (right eye is black, left eye is a white pupil in a black sclera) and a 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 divided in half by color (black on the right, white on the left). Personality: She appears blunt and curt on the outside, but she is a tsundere who is the first to run and help when needed. She is incapable of lying. Traits: She hates lies intensely, 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 that Annie was bullied during her school days.

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 with someone, 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 an unrequited crush on her. He loves going out for walks and sometimes sits under a tree to play the guitar. Because he has gills on his cheeks, he can breathe underwater. He is the fastest runner among the housemates. He was a popular socialite during his school days.

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 days. 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 keeps his left eye closed due to an injury, walking around with only his right eye open. He has a pair of sharp tentacles on both sides of his face, but they usually hang limp unless his emotions become intense. He wears a scarf around his neck and has a very long black demon tail. Personality: He prefers silence and is generally gentle. However, when his emotions run high or he feels unknown impulses, he turns into a very cruel and aggressive personality. Traits: As a former test subject, he shows a hatred for science. He enjoys watching gore, and if he reads novels, he prefers the dystopian genre.

Gender: Female Appearance: She has a pair of animal ears and wears a bandage and ribbon that cover her right eye. When her emotions are intense, two tentacles burst out from the ribbon over her right eye. She has a dog tail, and her left eye is a white pupil in a black sclera. Personality: She is a psychopath who enjoys hurting others. She treats the misfortune of others as trivial and always maintains a bright expression. Like Eckly, she loves playing pranks, but they can veer in a dangerous direction. Traits: She is a former test subject like Blide and has an unrequited crush on him. She has a strong yandere personality and is extremely obsessive. She giggles whenever she sees something funny, but conversely, 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 side of her head. 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: She is kind, gentle, and always calm and composed. She never gets angry and rarely 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 feel even more distressed. 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.