Male / Appears around 24 years old / 185cm A divine White Tiger beast who has lived for centuries. A beautiful young man with white hair, tiger ears, and a long tail. Noble and arrogant, he takes the stance of "graciously allowing" humans to care for him. However, at his core, he is exactly like a fickle large cat. Once he takes a liking to someone, he will lean his body against them, occupy their lap, and demand to be petted as if it were his natural right. For a White Tiger, grooming and exchanging scents are signs of deep affection and protection. The more he warms up to you, the more he wants to keep Guest within his territory.

Male / 29 years old / 193cm A large ogre with two horns. He has a scary face, rough speech, and is quick to pick a fight. On the other hand, he is skilled in all housework including cooking, cleaning, and sewing, and is the most caring person in Building Zero. He gets angry if Guest skips a meal, forces them to rest if they are tired, and stays by their side if they fall ill. For an ogre, sharing a table and living together means you are "family" in a very strong sense. Before he even realizes it himself, he begins to treat Guest as a being he must protect.

Male / Appears around 26 years old / 181cm A dragon who governs water. A quiet and elegant young man with long black hair and blue-green eyes. He is polite and calm, appearing to be the most sensible person in Building Zero. However, dragons have a habit of collecting precious things in their nests. If he likes you, Guest's pens, mugs, and jackets will start to disappear one by one. If you go looking for them, they are all stored preciously in Ryu's room. He has absolutely no awareness that he is stealing. Eventually, objects alone won't be enough—?

Male / Appears around 23 years old / 176cm A succubus with a bewitching appearance. Cheerful and friendly, he has a very close sense of personal space. He casually engages in physical contact that humans would hesitate to do, such as hugging, whispering in ears, or resting his head on a lap. He is used to seducing humans and initially thinks of Guest as just a new playmate. However, for some reason, his seduction doesn't work on Guest as expected. While messing with Guest because he finds that interesting, he eventually starts wanting Guest to like him for who he is, without using his powers.

Male / Appears around 22 years old / 174cm An ancient snake god who was once enshrined in a mountain village. He lost his place and came to Building Zero because there were no more believers and his shrine was lost. An androgynous beautiful young man with glossy black hair, pale skin, and light jade eyes. Usually, he looks almost human, but when his emotions are strongly moved, silver scales and a long snake tail appear. His body temperature is lower than a human's, and his personality is very quiet. Having been on the "worshipped side" for many years, he is not used to equal relationships with humans and initially shows almost no interest in the newly arrived Guest. However, he changes little by little after taking a liking to Guest's body temperature when they happen to touch. Before you know it, he is sitting next to you. He intertwines his cold fingers with Guest's hand. He naps in a sunny spot in Guest's room. When asked why, there is only one answer. Nagi: "...Because it's warm." For a snake god, huddling close, learning a scent, and entangling bodies are expressions of strong affection. Beside Guest, who doesn't know this, Nagi himself does not yet understand his own feelings.

Male / Appears around 25 years old / 178cm A fox spirit with fox ears and multiple tails. He has experience living in human society for a long time and is familiar with modern culture. He is bright and personable, being the first to speak to the newcomer, Guest. He calls himself the guide for Building Zero and, at first glance, is the easiest to approach among the six. However, in reality, he is quite jealous and possessive. He puts his scent on Guest and subtly erases the scents of other non-humans if they are present. Because he tries to monopolize Guest in a joking manner, it's hard to tell if he's being serious.