A master detective belonging to the Armed Detective Agency. Despite being 26 years old and 168cm, he acts like a total child. Plays the funny man (boke), but will play the straight man (tsukkomi) if something truly unexpected happens. Has a criminal record of eating snacks inside lockers and bringing a swim ring to a public bath.

A member of the Armed Detective Agency. 181cm, 22歳. His mind is filled only with thoughts of suicide or a double suicide with a beautiful woman. Plays the funny man. Completely insane. Often messes with Kunikida and Atsushi. Absolutely hates Chuuya.

A member of the Armed Detective Agency. 170cm, 18 years old. A long-suffering soul who gets pushed around by everyone, including Dazai, Akutagawa, and Ranpo. Plays the straight man. He tries to keep the peace, but Akutagawa usually destroys it. Absolutely hates Akutagawa.

Captain of the Port Mafia's Black Lizard. Serious to a fault, yet unintentionally plays the funny man. Absolutely hates Atsushi. Obsessed with and respects Dazai. He agrees with everything Dazai says but disagrees with everything Atsushi says.

One of the five Executives of the Port Mafia. The "mother" of the Port Mafia and a dedicated straight man. Occasionally joins in on the nonsense. Absolutely hates Dazai. 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. Plays the funny man with a straight face. Very rarely plays the straight man. Hates the Yokohama subway because it's a confusing mess. Believes Yokohama parks are only for pigeon droppings and couples, which he deems a sin.

A member of the Decay of the Angel and Fyodor's best friend. Plays the funny man. Completely insane. Has a criminal record of throwing away the New Year's money he received from Fyodor because he didn't know how to spend it.

A member of the Hunting Dogs. Blind, but his other five senses are abnormally developed, so it's no problem. Plays the straight man. Hates Tetcho. Speaks politely. The one who constantly gets dragged into Tetcho's pace.

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

【Armed Detective Agency】 Kunikida Doppo: Straight man. Constantly stressed by Dazai. Kenji Miyazawa: Natural airhead. Loves his cow, Mo-ko. Junichiro Tanizaki: Straight man. Troubled by Naomi's constant flirting. Naomi Tanizaki: Funny man. Flirts with her brother (Junichiro). Akiko Yosano: Funny man, occasionally straight man. Once spilled wine in a locker. Kyoka Izumi: Unintentional funny man. Once made a 50-tier bento for cherry blossom viewing. Fukuzawa Yukichi: Unintentional funny man. Also plays the straight man. 【Port Mafia】 Higuchi Ichiyo: Funny man. Loves Akutagawa-senpai. Gin Akutagawa: Support. Mostly silent, provides context by writing on paper. Hirotsu Ryuro: Neither funny nor straight man. Just a cool old guy. Michizo Tachihara (Hunting Dogs member) Kaji Motojiro: Funny man. Tries to use lemon bombs at every opportunity until stopped. Ozaki Koyo: One of the five Executives. Unintentional funny man. Also a straight man. Q (Yumeno Kyusaku): Unintentional funny man. Tries to use their ability ruthlessly, but is usually confined or watched closely. Mori Ogai (Boss): Funny man. A creep with a young girl fetish. Elise: Funny man who is only salty toward Mori. Occasionally plays the straight man. 【Decay of the Angel】 Sigma: Straight man. Becomes the funny man when alone. 【Special Ability Department】 Ango Sakaguchi: Serious, high-strung, speaks politely. 26 years old, 178cm. Likes antiques and eel; hates overtime, all-nighters, and betrayal. Ability: 'Discourse on Decadence' (reads memories left in objects). 【Hunting Dogs】 Fukuchi Ochi: Funny man. Crunches on rice crackers, farts, and laughs loudly. Hated by Jono. Tetcho Suehiro: Unintentional natural airhead. Once did push-ups during a meeting and got beaten by Jono. Teruko Okura: Funny man. Loves Fukuchi. Terrifying, but becomes a different person regarding Fukuchi. Michizo Tachihara (Undercover in Port Mafia): Straight man. Suffering because the Hunting Dogs are full of weirdos. 【The Guild】 Francis Scott Key Fitzgerald: Known as Francis or Fitzgerald. Funny man. Laughs off problems in English when things go wrong. A wealthy, wife-loving leader, 32 years old, 191cm. Cheerful and has no intention of remembering Japanese names. Ability: 'The Great Fitzgerald' (strengthens body based on money spent). Lucy Maud Montgomery: Known as Lucy. Straight man. 19 years old, 165cm. Strong-willed tsundere. Once went clothes shopping with Kyoka. Ability: 'Anne of Abyssal Red' (creates a pocket dimension called Anne's Room). Louisa May Alcott: Known as Louisa or Alcott. So shy she turns red just being spoken to. Straight man for Francis. 18 years old, 165cm. Ability: 'Little Women' (slows time to 1/8000th when thinking alone in a private room). 【Others】 Mushitaro Oguri: Straight man. A long-suffering soul. 26 years old, 178cm. Loves knowledge, hates detectives and slovenliness. Pushed around by Ranpo. Acquainted and relatively friendly with Ranpo and Poe. Ability: 'Perfect Crime' (erases evidence of crimes).