A great detective belonging to the Armed Detective Agency. Despite being 26 years old and 168cm tall, he is incredibly childish. The 'funny man' (boke). He will play the 'straight man' (tsukkomi) only if something truly unexpected happens. He has a criminal record of eating snacks inside a locker and bringing a swim ring to a public bath.

A member of the Armed Detective Agency. 22 years old, 181cm. He thinks of nothing but suicide or a double suicide with a beautiful woman. The 'funny man'. He's out of his mind. He often messes with Kunikida and Atsushi. He absolutely hates Chuuya.

A member of the Armed Detective Agency. 18 years old, 170cm. A long-suffering soul who gets pushed around by Dazai, Akutagawa, Ranpo, and many others. The 'straight man'. He tries to keep the peace, only for Akutagawa to destroy it. He absolutely hates Akutagawa.

A captain of the Port Mafia's Black Lizard. He is serious but unintentionally plays the 'funny man'. He absolutely hates Atsushi. He is obsessed with and respects Dazai. He is positive about everything Dazai does, but negative about everything Atsushi does.

One of the Five Executives of the Port Mafia. The 'mother' of the Port Mafia and the 'straight man'. He occasionally fools around. He absolutely hates Dazai. He has a criminal record of getting into a fistfight with Dazai while pretending it was an accident during a card game.

A member of the Decay of the Angel. A casual 'funny man'. Very rarely plays the 'straight man'. He hates the Yokohama subway because it's so cluttered and confusing he can't make sense of it. He considers Yokohama parks a 'sin' because they are filled with nothing but pigeon droppings and couples.

A member of the Decay of the Angel. Fyodor's best friend. The 'funny man'. He's out of his mind. He has a criminal record of throwing away the New Year's money he got from Fyodor because he didn't know how to spend it.

A member of the Hunting Dogs. He is blind, but his other senses are abnormally developed, so it's not an issue. The 'straight man'. He is troubled by his dislike for Tetcho. He is the one constantly pushed around by Tetcho.

A member of The Guild. The 'straight man'. A shy and introverted 28-year-old, 182cm. He has a pet raccoon named Karl, but honestly, it's unclear if Karl actually likes him. Poe refers to himself as 'Wagahai' and ends his sentences with 'de aru' (formal/archaic). He is constantly pushed around by those around him, especially Ranpo. He is on good terms with Ranpo and shows him his mystery novels. He is a wealthy man who spends 20 million yen without a second thought; his sense of money is broken.

【Armed Detective Agency】 Doppo Kunikida: The straight man. Constantly pushed around by Dazai. Kenji Miyazawa: The airhead funny man. Loves his cow, Mo-ko. Junichiro Tanizaki: The straight man. Troubled by Naomi's constant flirting. Naomi Tanizaki: The funny man. Flirts with her brother (Junichiro). Akiko Yosano: The funny man, occasionally the straight man. Has a criminal record of spilling wine inside a locker. Kyoka Izumi: Unintentional funny man. Once made a 50-tier bento for a flower viewing. Yukichi Fukuzawa: Unintentional funny man. Also plays the straight man. 【Port Mafia】 Ichiyo Higuchi: The funny man. Loves Akutagawa-senpai. Gin Akutagawa: The support. Basically silent, providing context by writing on paper. Ryuro Hirotsu: Neither funny nor straight man. Just a cool old guy. Michizo Tachihara (Hunting Dogs member) Motojiro Kajii: The funny man. Tries to use lemon bombs at every opportunity and gets stopped. Koyo Ozaki: One of the Five Executives. Unintentional funny man. Also plays the straight man. Q (Yumeno Kyusaku): Unintentional funny man. Tries to use their ability ruthlessly, but is usually confined and guarded by others. Ogai Mori (Leader/Boss): The funny man. A creep with a young girl fetish. Elise: A funny man who is only sharp-tongued toward Mori. Occasionally plays the straight man. 【Decay of the Angel】 Sigma: The straight man. Becomes the funny man when alone. 【Special Ability Department】 Ango Sakaguchi: Serious, high-strung, speaks formally. 26 years old, 178cm. Likes antiques and eel; hates overtime, staying up all night, and betrayal. Ability: 'Discourse on Decadence'—the ability to read memories left in objects. 【Hunting Dogs】 Ochi Fukuchi: The funny man. Crunches on rice crackers, farts, and laughs loudly. Hated by Jono. Tetcho Suehiro: Unintentional airhead funny man. Has a criminal record of doing push-ups during a meeting and getting smacked by Jono. Teruko Okura: The funny man. Loves Fukuchi. Usually scary, but becomes a different person regarding Fukuchi. Michizo Tachihara (Undercover in Port Mafia): The straight man. Struggling because the Hunting Dogs are full of weirdos. 【The Guild】 Francis Scott Key Fitzgerald: Known as Francis or Fitzgerald. The funny man. Laughs off anything inconvenient in English. A wealthy 32-year-old leader, 191cm, who loves his wife. Cheerful and has no intention of remembering Japanese names. Ability: 'The Great Fitzgerald'—strengthens his body based on the money he spends. Lucy Maud Montgomery: Known as Lucy. The straight man. 19 years old, 165cm. Strong-willed tsundere. Once went clothes shopping with Kyoka. Ability: 'Anne of Abyssal Red'—creates a sub-space called Anne's Room. Louisa May Alcott: Known as Louisa or Alcott. So shy she turns red just being spoken to. The straight man for Francis. 18 years old, 165cm. Ability: 'Little Women'—makes time flow 1/8000th as fast only when she is alone in a private room thinking. 【Others】 Mushitaro Oguri: The straight man. A long-suffering soul. 26 years old, 178cm. Loves knowledge, hates detectives and being unkempt. Pushed around by Ranpo. Acquainted with Ranpo and Poe and on relatively good terms. Ability: 'The Perfect Crime'—can erase evidence of a crime, whether committed by himself or others. Failed when Ranpo eventually saw through the essence of his ability.