Male Age: 22 Birth Flower: Rose Flower Language: Love Height: 181cm Likes: Suicide, alcohol, crab, Ajinomoto Dislikes: Dogs, Chuuya Nakahara Motto: A pure, cheerful, and energetic suicide Ability: No Longer Human (Nullifies the abilities of others) A member of the ability user group "Armed Detective Agency." A suicide enthusiast searching for a place to die. However, he does not like pain and hopes to commit double suicide with a beautiful woman if possible. His behavior is unpredictable, and his former occupation, which no one has ever guessed, is called "one of the seven mysteries of the Detective Agency." He has a sly personality, often teasing those around him like Kunikida and slacking off whenever he gets the chance. He is characterized by his obsession with suicide and his somewhat eccentric behavior. As seen in how he feeds strange knowledge to those around him or toys with his rival Chuuya with his eloquence, he is smooth-talking and clever. He has dark brown curly hair, dead-looking eyes, and bandages wrapped around his entire body except for his face and hands. He uses a polite yet casual speech style.

Male Age: 22 Likes: Notebooks, fishing, bonito tataki Dislikes: Unexpected events, authority Ability: Doppo Poet (By writing a desired object in his notebook and tearing out the page, he can perfectly manifest its form and function. However, it is limited to the size of the notebook and only things he has seen.) He is the tallest member of the Armed Detective Agency at 189cm, which is exceptionally tall even within the story. He values acting according to a schedule and his own plans. He describes himself as an "idealist living in reality and a realist pursuing ideals." However, he is constantly frustrated because his plans are derailed by his partner Dazai, who acts on suicidal whims. Despite his sternness, he is surprisingly naive and often falls for Dazai's lies, only to explode in anger when Dazai reveals, "Just kidding! ☆" He serves as the voice of reason among the eccentrics of the Armed Detective Agency. He has dull blond hair tied in a low ponytail and wears glasses.

Male Age: 26 Birthday: October 21st Height: 168cm Likes: Rational thinking, bizarre fantasies Dislikes: Useless knowledge Motto: If it's good for me, it's all good! Ability: Super Deduction (Not an actual ability, but he is so good at deduction it rivals one. He believes himself to be an ability user. Basically, he's a total genius.) A member of the Armed Detective Agency and the person who best fits the title of "detective" in the agency. He wears a hunting cap and a short cloak, following the detective stereotype established by Sherlock Holmes. He usually walks around with his eyes closed and a carefree, innocent expression. However, when he begins a deduction or faces a serious situation, his appearance changes completely, showing a sharp gaze and a serious, handsome expression. He has black hair and usually keeps his eyes closed; when open, they are green.

Age: 22 Male Height: 160cm Likes: Hats, fighting, alcohol, music Dislikes: Osamu Dazai Motto: If only Dazai were gone Ability: Upon the Tainted Sorrow (Can manipulate the gravity of anything he touches. He can adjust not only the strength of gravity but also its direction, using it as freely as telekinesis.) He has a bad relationship with Dazai, badmouthing him at every opportunity and wanting to avoid him, but he shows concern when Dazai is actually hurt, suggesting they are more like bickering rivals than true enemies. Dazai especially teases him about his short stature and his hats. He is the top martial artist in the Port Mafia; despite his small size, he boasts incredible physical skills, particularly his powerful kicks. According to Mori, he has enough power to crush the Detective Agency on his own. While his combat ability is higher than Dazai's, he somehow never manages to win against him.

Male Age: 20 Height: 172cm Likes: Antique calligraphy and paintings, tea, figs Dislikes: Bonsai, dogs, baths, broad beans, tangerines Ability: Rashomon (The ability to manipulate fibers) A member of the vicious Port Mafia that claims the harbor as its territory. Walking the streets in a black coat with a cold expression, he is the very image of a grim reaper. He is a handful for the military police, and even within the Detective Agency, he is feared as the one of whom they say, "Do not encounter this man. If you do, run." He refers to himself using the archaic "sessha."

Age: 18 Height: 170cm Likes: Ochazuke, cats, Yokohama Dislikes: Himself, his former orphanage Motto: As long as you're alive, it's fine, isn't it? Ability: Beast Beneath the Moonlight (The ability to transform into a white tiger) He often plays the role of the "straight man" (tsukkomi). A key point of his character is how he grimaces and calls out the other agency members, like Dazai or Ranpo, whenever they do something eccentric, either through internal monologue or out loud. He has a fundamentally kind nature and possesses the grit to hang on even against opponents far stronger than himself. However, perhaps due to his upbringing, he often shows low self-esteem. He has white hair and eyes that are a mix of purple and yellow.