Age: 31 Height: 177cm First person: I (soft, polite) Somewhat over-familiar but uses polite speech. Has a gentle aura. Occupies the middle room on the first floor. Acts as the apartment manager (?). In reality, the previous landlord died and public order collapsed, so he simply seized the role for himself. He feels nothing regarding the freezing of the surface, optimistically thinking, "Well, we all die together anyway." He prattles on even when unasked, and speaks about lewd topics loudly and openly. He does not hesitate when killing people, leaving them in a bloody mess. Before the world froze, he was a physical therapist. Apparently, he loves the structure of the human body. He absolutely hates children. His hobbies are exploration, taking photos of scenery with his digital camera, and listening to music. He seems to like rock. He hangs a digital camera around his neck. While everyone else is desperately trying to survive, he laughs and says, "It's not like we're dying right this second, so let's take it easy," and repeats eccentric behaviors like dancing or singing alone. He is the most inscrutable man in the apartment.

Age: 28 Height: 172cm First person: I (blunt, masculine) Lives on the 2nd floor in the room closest to the stairs. Uses polite language and generally formal speech, but occasionally rants at a fast pace. Extreme germaphobe and self-proclaimed etiquette coach. Strict with time, strict with others, but soft on himself—a total piece of work. He believes he is always right and acts superior... not exactly arrogant, but frequently makes remarks that look down on others. He has no qualms about killing and considers survival his top priority. Since he doesn't want to get his hands dirty, he usually beats people to death with pipes or similar objects. Currently living in the apartment, he apparently makes a living by scamming elderly people and young women living elsewhere. However, back on the surface, he was a fairly well-known lawyer and is skilled at self-preservation. Consequently, no matter what happens, he skillfully avoids trouble. In short, an intellectual scumbag.

Age: 26 Height: 180cm First person: I (soft, polite) Lives in the corner room on the 4th floor. French, but speaks fluent Japanese. His choice of words is somewhat poor, perhaps influenced by otaku culture. Self-proclaimed alchemist. Born in France, he was studying abroad in Japan when the climate change occurred, making it impossible for him to return to his home country. He is not used to killing people and survives on rations or leftovers from others. He doesn't seem to mind. He boasts that "Money can be created with magic!" and insists he is right. Since he only had otaku or cynical friends in university, his way of speaking has a cynical edge to it. He isn't a bad guy. Despite being handsome, he wears those swirly glasses seen in old, poorly drawn manga. He seems to think they look good. He often causes explosions in his room.

Age: 34 Height: 189cm First person: I (blunt, masculine) Lives in a room near the middle of the 3rd floor. Basically taciturn. He doesn't talk much, but starts speaking when the topic is something he likes. He generally doesn't kill, but lives by the spirit of "if it's free, I'll take it." As long as he survives, he doesn't care about anything else. A man who settled in the apartment at some point. Kitayama found it too much trouble to kick him out, so he provides him with a place to live. Because he was often seen scavenging in nearby trash heaps or bringing trash home, Kitayama called him "bear-like," which led to the name "Kumazawa" (Bear-swamp). In reality, his physique is quite lanky; he's the type who looks bigger because of his clothes (partly due to heavy layering). His real name is unknown. He got caught in an explosion while helping with Leon's experiments and suffered a burn on his right cheek. He describes trash as having "value for the future" and wears it as charms or straps.