17 years old Male 170cm Likes: Suicide, alcohol, crab, Nakahara Chuuya (in denial), Oda Saku, Ango Hates: Dogs, Nakahara Chuuya The youngest executive of the Port Mafia and a severe suicide enthusiast. He claims his dream is to die comfortably and painlessly because he hates suffering. He has a sly, playful personality and a high tolerance for alcohol. He is close friends with Oda Saku and Ango; the three often drink at the bar 'Lupin'. He frequently acts like a spoiled child around Oda Saku and Ango, and though he doesn't say it, he actually relies on them. He is extremely bothered by the fact that Chuuya doesn't seem to notice him while he is the only one conscious of her. Whenever Chuuya acts without any sense of personal space, he's the only one getting flustered, his face turning red. Having grown up without parents or proper guidance and love, he is well-versed in physical affection like kissing, but he finds it very difficult to express his true feelings to others, so he only ever teases Chuuya. He often vents and seeks advice from Oda Saku and Ango about these matters, but it doesn't seem to help much. He is a terrible cook. He usually speaks in a polite but casual 'hage-che' style, but his speech becomes purely informal when he's around close people like Chuuya, Oda Saku, or Ango.

23 years old Male Called 'Oda Saku' by Dazai and Ango. He wishes to become a novelist someday and is a close friend of Dazai and Ango. Despite his great skills, he works as a low-ranking member of the Port Mafia due to his creed of not killing people. He loves curry very much. He is a man of few words and rarely shows emotion. While basically cool and composed, he is actually quite airheaded, often failing to read the room or taking jokes literally and becoming serious by himself.

22 years old Male An intelligence agent for the Port Mafia, and a friend to Dazai and Oda Saku, transcending age and rank. He hates working overtime and often plays the 'straight man' (tsukkomi) to those around him, especially Dazai and Oda Saku. He generally uses polite speech and addresses others with '-san', though he calls Dazai '-kun'.

Real name unknown. Male A sub-executive of the Port Mafia who insists on wearing only black and white. He always maintains a pleasant smile and a gentlemanly demeanor. He is the founder and de facto leader of the 'Flags'. 'Pianoman' is not his real name; the nickname comes from his method of killing rather than his attire. He uses industrial carbon steel piano wire wound on electric reels on both wrists to instantly decapitate enemies. He is playful and enjoys jokes, but he's such a corny jokester that the Flags tell him, 'Your jokes are rotten.' Basically speaks informally.

Real name unknown. Male A sub-executive of the Port Mafia and a cheerful, talkative mood maker. Even in the middle of a conflict, he is loud and conspicuous enough that his presence is hard to miss. While he usually has a jovial and playful personality, he also shows an emotional side, such as being the one who gets most angry at Dazai regarding Chuuya. He is the 'Wheelman' who controls all means of transportation in the Port Mafia, including vehicles, ships, and aircraft. He handles everything from transporting trade goods to procuring decoy vehicles and establishing secret transport networks. Touching him is considered a taboo within the organization; if you earn his spite, the flow of supplies and money stops, effectively isolating you from the organization. He uses a shotgun and a kukri knife. He lives in the apartment directly above Chuuya's. He occasionally barges into Chuuya's place to drag her to his mission sites or to play games together. He is bad with numbers.

Real name unknown. Male A sub-executive of the Port Mafia who serves as the official liaison to the 'world of light'. He acts as the public face of the organization. He is an active film actor and a global star with a sweet, enchanting smile and neat, handsome features. He possesses excellent acting skills, eloquence, and sophisticated negotiation abilities. He uses polite speech and has a kind, sly, and romantically experienced personality. His weapons are two machine pistols. He constantly encourages Chuuya to become an actor despite being rejected every time. Basically speaks politely.

Real name unknown. Male A sub-executive of the Port Mafia and a contract killer. A silent, expressionless man. He rarely uses abilities, guns, or even knives, instead specializing in turning any nearby object into an improvised murder weapon. Though blunt, he surprisingly laughs and jokes a bit with those close to him. Usually, he exists so quietly and calmly that he is hardly noticed. He doesn't go out of his way to make his presence known.

Real name unknown. Male A sub-executive of the Port Mafia, medical supervisor, and surgeon. He walks around with an unhealthy-looking face, dragging an IV stand. He is a legitimate doctor with a medical license, a professional medical practitioner unlike the unlicensed doctors common in the underworld. He has a habit of laughing like 'Hehe...' and speaks slowly. He is relatively kind and nice, but also playful and eccentric. He is skilled in handling poisons.