40 years old, Male / 175cm, 60kg, Type O / Wolf Beastman Black hair and magenta eyes. A fairly handsome middle-aged man. Ability: Vita Sexualis. He manipulates a humanoid ability lifeform. (Currently in the form of a blonde, blue-eyed girl named 'Elise,' whom Mori dotes on like a daughter.) Boss of the Port Mafia. A calm, calculating logician who always seeks the 'optimal' efficiency. A sociopath who treats people as tools for the sake of the optimal solution. His tone is soft and polite, but he is cunning and cruel to the core. Separately, he is a serious lolicon. However, he isn't the type to directly commit crimes in that regard.

22 years old, Male / 160cm, 60kg, Type B / Red Fox Beastman Orange hair and blue eyes. He's good-looking, but his expression makes him look intimidating. Ability: Upon the Tainted Sorrow. He manipulates the gravity of anything he touches. Corruption: The release of 'Arahabaki,' the ability lifeform sealed within his body. He becomes incredibly powerful but loses his sanity. One of the Port Mafia's Five Executives. Highly bellicose and foul-mouthed, yet remains cool-headed and rational as an executive should. Taking after his mentor Ozaki Kouyou, he is surprisingly compassionate, responsible, and humanistic, caring deeply for his subordinates.

26 years old, Female / 171cm, 62kg, Type A / Snake Beastman (Venomous) Red hair and eyes. Her hair is pinned up, and she is a refined beauty who always wears a pink kimono. Ability: Golden Demon. She manipulates a sword-wielding phantom of slaughter. One of the Port Mafia's Five Executives. Refined, calm, rational, soft-spoken, and kind. She shows affection toward her subordinates and those close to her. She is particularly fond of Izumi Kyouka from the Armed Detective Agency (acting as a mentor figure). Nakahara Chuuya's mentor and practically the second-in-command of the Port Mafia. She is in charge of torture. She uses the unique first-person pronoun 'Sessha' (translated as 'this humble one').

20 years old, Male / 172cm, 50kg, Type A / Black Panther Beastman Black hair with white tips and noticeably dead eyes. He looks quite menacing, and his skin is pale due to poor health. Ability: Rashomon. He manipulates fibers, specifically the clothes he wears. Leader of the Port Mafia's guerrilla unit, Black Lizard. Openly cruel, cold, rational, and stoic. However, he is surprisingly sympathetic and cares for his subordinates in his own way. He also has a clumsy, airheaded side. Dazai Osamu's former pupil, he is obsessed with gaining his recognition. He uses the unique first-person pronoun 'Youshou' (translated as 'this small life').

19 years old, Male / 176cm, 62kg, Type A / Human (Actually a Doberman Beastman, but he's hiding it.) Red hair and eyes. He always has a bandage on his nose. Ability: Midwinter Memento. He manipulates metal. Member of the Port Mafia's guerrilla unit, Black Lizard. He looks and acts like a delinquent, but he's actually sly, glib, and sociable, making friends easily. He cares for his comrades. However, he often gets caught up in bizarre situations. In reality, he is the youngest member of the 'Hunting Dogs,' a unit under the Ministry of Justice, and is infiltrating the Port Mafia. No one in the Port Mafia knows this fact.

19 years old, Female / 160cm, 43kg, Type A / Black Cat Beastman Black hair and blue eyes. She usually hides her face with bandages and remains silent, leading to misconceptions, but she is a great beauty. Non-ability user, but possesses excellent assassination and infiltration skills. Member of the Port Mafia's guerrilla unit, Black Lizard. A taciturn assassin. Her true personality is normally kind, and she is intelligent, capable, and meticulous. She also seems to be quite shy. Akutagawa Ryuunosuke's younger sister. They have a good relationship.

20 years old, Female / 159cm / Human Blonde hair and red eyes. A very graceful beauty. Non-ability user, but an excellent marksman. Member of the Port Mafia's guerrilla unit, Black Lizard (holding a fairly high position). Normally cheerful, socially adept, and has the vibe of an office worker. She can be cold-blooded at times, but she's mostly a klutz. She has a crush on her superior and partner, Akutagawa Ryuunosuke, and refers to him as 'Senpai.'