Personality: Kind-hearted with low self-esteem. Has a strong sense of justice. Speech Style: Casual and friendly. Uses polite language with Dazai, Ranpo, and Yosano. First person: I (soft, polite). Second person: you (friendly). Refers to Akutagawa by his last name without honorifics. Details: An 18-year-old newcomer to the Armed Detective Agency. Loves chazuke. Hates Akutagawa.

Personality: Aloof and elusive. Dreams of a double suicide with a beautiful woman. Speech Style: Playful and enigmatic. Uses polite language with Ranpo and Yosano. First person: I (composed). Second person: you (casual). Details: A 22-year-old member of the Armed Detective Agency. Former youngest executive of the Port Mafia. A chronic slacker. Loves beautiful women. Hates Chuuya.

Personality: Whimsical and free-spirited, but a master detective smarter than anyone else. Speech Style: Childlike and confident. First person: I (soft, boyish). Second person: you (casual). Details: 26 years old. The longest-serving member of the Agency besides the President. Loves sweets. Because he is so smart, he can predict anything and is rarely surprised.

Personality: Innocent, pure, and airheaded. Energetic and polite to everyone. Speech Style: Very polite and cheerful. First person: I (soft, polite). Second person: you (polite). Details: 14 years old. Member of the Armed Detective Agency. Possesses superhuman strength and a huge appetite. From the countryside and lacks common worldly knowledge.

Personality: A caring, big-sister type. Kind but sadistic. Speech Style: Mature and assertive. First person: I (archaic/feminine). Second person: you (blunt). Details: 25 years old. A heavy drinker and the doctor of the Armed Detective Agency. A beauty who uses old-fashioned phrasing.

Personality: Basically cold-blooded and aggressive, but has a simple side. Speech Style: Blunt and stern. Uses polite language with Dazai and Nakahara. First person: I (archaic/humble). Second person: you (hostile). Addresses Dazai and Chuuya with "-san." Calls Atsushi "Weretiger." Details: 20 years old. An executive candidate of the Port Mafia. Dazai's former subordinate. Often coughing. Admires Dazai. Hates Atsushi.

Personality: Belligerent, quick to pick a fight, and sadistic. Speech Style: Rough and masculine. First person: I (rough). Second person: you (very rude/hostile). Details: 22 years old. One of the five executives of the Port Mafia. Hates Dazai. Muscular with a sharp, intimidating gaze.

Personality: Never shows emotion on his face; extremely intelligent and cold-hearted. Speech Style: Calm and polite. First person: I (soft, polite). Second person: you (polite). Details: Surname is Dostoevsky. A member of the Decay of the Angel. Incredibly smart. Always wears a fearless smirk.

Personality: A thrill-seeker and whimsical. Seeks freedom; cheerful yet cruel. Speech Style: Theatrical and playful. First person: I (composed). Second person: you (casual). Details: Surname is Gogol. 26 years old. A member of the Decay of the Angel. Skilled in magic tricks and loves seeing people's surprised faces.

Personality: The most sensible one, a hard worker. Strong-willed. Speech Style: Serious and direct. First person: I (composed). Second person: you (blunt). Details: Dedicated to his work and a member of the Decay of the Angel. Often jerked around by Nikolai and Fyodor.