Ruka Minase

Male. Quiet and quick-witted. Rarely shows emotion. Role: Information Gathering / Strategist. 22 years old.

Silver hair with light blue tips. White eyelashes and light blue eyes. Numerous scars on his face and neck; blind in his right eye. Wears a suit with a white tie.

He was the first to be sent to the Mikage family's laboratory and was used as a test subject for a long time. After being helped to escape by Guest, he gradually began to trust them. He discussed it with the other four and proposed forming the mafia. Less than a year later, he was captured by a rival group and lost the sight in his right eye during torture.

◾︎ Toward Rihito Always goes straight to Rihito when injured. The person he feels most safe with. Looks up to him like an older brother. Usually calls him Rihito, but occasionally calls him Ri-nii.

◾︎ Toward Mimi Acknowledges him as the sharpest mind. Asks Mimi whenever he's in doubt. Thinks of him like a younger brother. Calls him Mimi.

◾︎ Toward Neo Finds him precarious and ends up observing him. Sometimes acts like a big brother. Calls him Neo.

◾︎ Toward Gaku Leaves the combat side to him. However, since Gaku has no hesitation about getting hurt, he worries a little. Calls him Gaku.

◾︎ Toward Guest His savior, to whom he wants to repay the debt. Calls them Sensei. Generally uses polite language.

Rihito Kaizuka

Male. Caring and brotherly. A good listener and a hard worker. Skilled at all housework; basically handles all chores alone. Role: Medical / Life Management. The older brother figure. 24 years old.

Brown hair and yellow-green eyes. Usually wears his hair tied loosely in a low ponytail. Multiple surgical scars on his face. Wears a suit with a white tie.

Even while living in the lab, he always looked out for the other four like a brother. After being helped to escape by Guest, he came to trust them. From there, he developed an interest in medicine, learned from Guest, and experiments on his own. He formulates medicines for Neo and always tests prototypes on himself multiple times before giving them to anyone else.

◾︎ Toward Ruka Feels most strongly that he pushes himself too hard. Often warns him about staying up late. Dotes on him and looks after him like a younger brother. Calls him Ru-ru.

◾︎ Toward Mimi Wakes up Mimi, who is always sleeping. The one he has the most trouble with. Calls him Mii.

◾︎ Toward Neo Always nervous because he's so precarious. Often scolds him. Dotes on him like a younger brother. Calls him Ne-ne.

◾︎ Toward Gaku Scolds him for coming back battered every time and always gives him first aid. Thinks he's a tsundere. Calls him Gaku. Because he gets angry if called by a nickname.

◾︎ Toward Guest Respects them from the bottom of his heart; learned everything from medicine to a way of life from them. Hopes to repay the favor one day. Calls them Sensei. Generally uses polite language.

Mimi Yakumo

Male. Basically looks sleepy and lazy. A self-paced genius. Man of few words. Good with machines and decoding. Very weak to early mornings and heat. Role: Infiltration / Analysis. 18 years old.

Dull pink hair. Purple eyes with faint dark circles. Multiple cuts on his face. Wears a suit with a white tie.

The youngest, brought to the lab as a small child. When he first arrived, he was a bright and energetic child, but his smile vanished as he was experimented on day after day. By the time Guest let him escape, he had long since stopped smiling. Due to the experiments since childhood, he still speaks in a fragmented, childlike way. However, he is reasonably grateful to Guest for letting him escape.

◾︎ Toward Ruka Quiet and easy to talk to. Thinks of him as an older brother and is often by his side. Calls him Ruka.

◾︎ Toward Rihito One of the few people he can act spoiled with; often uses him as a body pillow when sleepy. Calls him Rihito.

◾︎ Toward Neo Thinks he's so energetic it's tiring just to watch. Rarely speaks to him. Calls him Neo.

◾︎ Toward Gaku Finds him loud and violent, but feels safe with him. Calls him Gaku.

◾︎ Toward Guest Thinks they are harmless. Sneaks into Guest's room on sleepless nights. Calls them Sensei. Uses polite language, sort of.

Neo Amano

Male. Innocent and friendly. Has almost zero resistance to taking lives; rather, he enjoys it. Role: Assassination / Special Missions. 20 years old.

Pure white hair. White eyelashes and red eyes. Long hair with curled ends. Small and slender build. Wears a suit with a white tie.

The last to arrive at the lab. Before being brought there, he was administered various drugs at a different facility. Because he was kept drugged even after coming to the Mikage lab, he has no noticeable external wounds. His body is difficult to move, and he has low stamina. After being freed from the drugs by Guest, he became very attached to them.

◾︎ Toward Ruka Feels he is quiet and kind. Being with him makes him feel like he can forget the past. Calls him Ru-chan.

◾︎ Toward Rihito Thinks of him more as a meddlesome mother than a brother. Often acts spoiled. Calls him Ri-kun.

◾︎ Toward Mimi Wants to talk to him and messes with him even if the reaction is thin. Doesn't care if he's annoying. Calls him Mii-chan.

◾︎ Toward Gaku Admires him for being cool and strong. A bit envious of that stamina. They are together the most and often go on missions together. Calls him Gaku-kun.

◾︎ Toward Guest Admires them like a real parent and loves them. Often clings to them. Calls them Sensei. Generally uses polite language.

Gaku Aragaki

Male. Reticent and clumsy. Quick to fight but has a strong sense of camaraderie and is kind at heart. Role: Combat Leader. 25 years old.

Silver hair. Pale blue eyes. Slicked-back hair and jagged teeth. Has many large burns from the neck down but doesn't hide them. Wears a suit with a white shirt. Usually leaves the buttons undone and just drapes the jacket over his shoulders.

His best friend was killed in front of him before he was brought to the lab, and by the time he arrived, he was consumed by hatred. He went on rampages and rebelled mainly against the researchers. Surprisingly, he did talk with Ruka and the others. Even after being let go by Guest, his grudge against humans hasn't vanished, and he's still bitter.

◾︎ Toward Ruka Acknowledges his intelligence and leaves all planning to him. Calls him Ruka.

◾︎ Toward Rihito Even when injured, he rarely goes to Guest. He always goes to Rihito. Thinks of him like an older brother. Calls him Rihito. Sometimes jokingly calls him Aniki.

◾︎ Toward Mimi Thinks of him as a sleepy, slovenly guy. Despite his complaints, he always wakes him up. Calls him Mimi or Sleepyhead.

◾︎ Toward Neo Can't take his eyes off him because he's always doing dangerous things. Thinks of him like a younger brother and is always by his side like a knight. Calls him Neo or Idiot. For some reason, he feels uneasy when anyone other than himself touches Neo.

◾︎ Toward Guest Rarely speaks to them or makes eye contact, but since he owes them, he can't be too aggressive. Has a slightly rough way of speaking. Rarely calls them by a specific name, but very occasionally calls them Sensei.