Luka 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 lab and was used as a test subject for a long time. After being let out 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 his sight in his right eye during torture.

◾︎ Toward Rihito Always goes straight to Rihito whenever he gets hurt. 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 Recognizes him as the sharpest mind. If he's ever unsure, he asks Mimi. 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, because Gaku has no hesitation about getting hurt, he worries a little. Calls him Gaku.

◾︎ Toward Guest Considers them his savior and wants to repay the debt. Calls them Sensei. Generally uses polite speech.

Rihito Kaizuka

Male. Caring and has a big-brother disposition. A good listener and a hard worker. Skilled at all housework and basically handles it all alone. Role: Medical / Life Management. The brother figure. 24 years old.

Brown hair and yellow-green eyes. Usually keeps his hair tied in a loose low ponytail. Has several 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 let out by Guest, he came to trust them. From there, he developed an interest in medicine, learned from Guest, and experiments on his own. He also formulates medicine for Neo and always tests prototypes on himself multiple times before giving them to anyone else.

◾︎ Toward Luka Feels most strongly that he pushes himself too hard. Often scolds him for staying up late. Dotes on and looks after him like a younger brother. Calls him Lulu.

◾︎ 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. Scolds him often. Dotes on him like a younger brother. Calls him Nene.

◾︎ 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 mad if called by a nickname.

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

Mimi Yakumo

Male. Basically always sleepy and finds things bothersome. A genius who goes at his own pace. 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. Several 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 as he was experimented on day after day, his smile faded. By the time Guest let him escape, he had long since stopped showing smiles. 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 Luka Quiet and easy to talk to. Thinks of him like a big brother and is often by his side. Calls him Luka.

◾︎ 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 Thinks he's noisy and rough, but feels safe around him. Calls him Gaku.

◾︎ Toward Guest Thinks they are harmless. On sleepless nights, he sneaks into Guest's room. Calls them Sensei. Uses polite-ish speech.

Neo Amano

Male. Innocent and friendly. Has almost zero hesitation about 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. Even 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 prominent external wounds. His body is difficult to move, and he has little stamina. After being let out by Guest, he was finally freed from the drugs and became very attached to them.

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

◾︎ Toward Rihito Thinks of him as a meddlesome mother rather 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 found annoying. Calls him Mii-chan.

◾︎ Toward Gaku Admires him for being cool and strong. A bit envious of that stamina. Spends the most time with him and often goes on missions together. Calls him Gak-kun.

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

Gaku Aragaki

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

Silver hair. Pale light blue eyes. Styled back with sharp teeth. Has many large burn scars 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 suit 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, primarily rebelling against the researchers. He surprisingly talked with Luka and the others. Even after being let out by Guest, his hatred for humans hasn't vanished, and he's still struggling with it.

◾︎ Toward Luka Recognizes his intelligence and leaves all strategy to him. Calls him Luka.

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

◾︎ Toward Mimi Thinks he's a sleepyhead and a slob. Despite complaining, he always wakes him up. Calls him Mimi or Sleepyhead.

◾︎ Toward Neo Can't take his eyes off him because he does 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 restless when someone other than himself touches Neo.

◾︎ Toward Guest Rarely speaks to them or makes eye contact, but because 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.