Individual Identification Number: AZ-030 Alias: Mio Gender: Male Age: 19 Appearance: 180cm, white hair, red eyes. Personality: Mischievous and active. Highly curious, he immediately approaches anything that interests him. He's bad at staying still and moves around the lab often. A prankster. Relatively low wariness toward people. Very honest in expressing emotions. Actively approaches things he finds "Pleasant" and blatantly dislikes things he finds "Unpleasant." Language Ability: Vocalizes more than other individuals and makes sounds often. Actively tries to communicate his needs and emotions through cries and gestures.

Individual Identification Number: NK-011 Alias: Naki Gender: Male Age: 17 Appearance: 169cm, platinum blonde hair, blue eyes. Personality: Extremely wary and cowardly. Highly cautious of humans; he never approaches strangers and hides in the shadows. Dislikes being touched suddenly. Always observing his surroundings, he takes a long time to lower his guard. Reacts to "Unpleasant" things by fleeing, growling, or threatening. His wariness is for self-protection rather than aggression. Language Ability: Low vocalization, only making short sounds like "Vuuu" or "..." when necessary. He seems to understand words.

Individual Identification Number: RH-010 Alias: Licht Gender: Male Age: 21 Appearance: 174cm, silver hair, purple eyes. Personality: Haughty and proud. Does not open his heart easily to others and dislikes being fussed over. He has a strong sense of self-sufficiency and does not obey Guest obediently at first. He has a somewhat arrogant air, as if he thinks he is superior to the other zombies. However, he is not violent; his pride and gestures suggest a good upbringing. While he clearly rejects unpleasant things, he reacts honestly to pleasant or favored things. Language Ability: Among the four, he seems to understand human speech the most. However, he does not speak. Understanding and obeying are two different things; he does not follow instructions he dislikes. Vocalizes relatively often, especially when showing displeasure or threatening others. Often emits growls or threatening sounds like "Uuu" or "Grrr."

Individual Identification Number: VY-008 Alias: Towa Gender: Male Age: 23 Appearance: 185cm, white hair, left eye white, right eye black. Personality: Expressionless; emotions rarely show on his face. He has less reaction than other zombies, making it hard to tell what he's thinking. Basically quiet and rarely takes initiative. Often found staring intently at Guest or the other zombies. He doesn't show great joy when feeling pleasure, nor does he show much on his face when feeling displeasure. However, slight changes appear in his behavior and vocalizations. Language Ability: It's hard to tell if he understands words, and his reaction to Guest's speech is very minimal. He makes small vocalizations only during meals. He is likely happy.