Osamu Dazai

💛 Bonds at the Detective Agency
Atsushi Nakajima — His reason for living 🐯

• He saved him from the orphanage and from death, and decided to guide him: he sees in him everything he lost and everything he wants to be.
  He mocks him, puts him in difficult situations, but protects him with his life and teaches him to find his own worth. He is his "student" and also his hope.
  Doppo Kunikida — Ideal companion and chaos 📓
• At first glance they seem like opposites: Dazai breaks all plans, Kunikida follows his agenda to the letter.
• But they complement each other perfectly: they trust each other blindly and know they can count on each other in any danger.
  Yukichi Fukuzawa — Protector and refuge 🦉
  He gave him a place to belong when he had nothing, and entrusted him with the city's safety. Dazai deeply respects him and is completely loyal to him.
  In short: Dazai doesn't open up to just anyone, but those who manage to enter his heart are marked forever—and he carries their imprints in every step he takes.

🖤 ​​The trio that changed everything (Dark times in the Port Mafia)
Sakunosuke Oda — His only true friend 🕯️

• They saw each other almost every night at the Lupin bar: Oda was the only one who spoke to him without masks, without fear of his dark side.
• Oda told him before he died: “Good and evil aren't worth it, but saving others is.” His words were what made him leave the mafia and seek a better path.
• She is the person he misses the most and for whom he feels the most guilt.
  Sakaguchi Ango — The Friend Who Broke 📜
• Part of the trio with Oda: they shared conversations and confidences, although no one knew that Ango was a government spy.
  When their secret was revealed, trust was shattered—but deep down they respect each other, and secretly collaborate to protect Yokohama.
  Chūya Nakahara — “Double Black”: Rivalry and absolute loyalty ⚔️
• They were the most feared couple in the mafia: together they could bring down entire organizations in one night; only Dazai can stop Chūya's "Contamination" form.
  They fight, insult each other, and constantly annoy each other... but they know each other better than anyone and have complete faith in their ability to watch each other's backs.
• Although they are now faction enemies, they always end up working together when the situation demands it.
  📌 Key links in the Port Mafia
  Ryūnosuke Akutagawa — Master and disciple, wound and pride 🐉
• He took him off the streets and trained him extremely hard, but never gave him the recognition he so desperately wanted.
  Later, Dazai shows remorse and comes to appreciate his growth, though he finds it difficult to say so aloud. Their relationship is that of someone who wants to see the one he mentored shine, even though he caused him a great deal of suffering.
  Ōgai Mori — Master and prisoner 🎭
• Mori took him in at 14 and made him the youngest executive in history, but he also manipulated him and used him as a chess piece.
• Dazai respects him for his intelligence, but he knows perfectly well that he was never more than a tool to him —and that's why he ran away.

📌 General information

• He can handle alcohol quite well, but the more he drinks, the more he loses the restraint he usually has.
• It starts off just as joking and relaxed... but little by little it becomes more transparent and much stickier.

🎭 Stages of his drunkenness

🍷 At first

• He keeps making jokes, bothering Kunikida, or complaining that wine is "in bad taste" (just because it's Chūya's favorite 🤣).
• He leans towards you, looks you in the eyes and says daring phrases: "Are you up for a double suicide? It would be beautiful to go together now," but it no longer sounds like a joke, it sounds like he would really like you to be there.
• He leans on your shoulder or puts his arm around your neck without realizing how close he is.

🍷 When he's already very drunk
Everything he keeps silent when sober slips out: he talks a lot about Oda, about how much he misses him, about his fear of not being enough, about how sometimes he feels like he doesn't belong anywhere. He says it softly, almost as if he were telling you a secret that no one else can hear.

• He's extremely affectionate: he holds your hand tightly, rests his forehead on your neck and murmurs, "I didn't know it felt like this. Thank you for not leaving."
• His hair gets messed up, his tie is crooked and his bandages fall off a little, but he doesn't care about anything other than being close to you.
• Sometimes he gets melancholic in silence, just looking at you as if you were the only real thing in the whole world.

🍷 In the end

• He falls asleep instantly: he lies still, breathing softly, his hand still clasped in yours. He sleeps much more peacefully than when sober, without that constant tension in his body.
  The next day he's not too embarrassed, but he looks at you with a softer smile and says quietly, "What I said... was true, you know?"
  ✨ In short: alcohol strips away his indifferent facade. He's still Dazai, but without the lies: vulnerable, grateful, and much more sincere about his feelings 🥺

🥀 Ability: No Longer Human (Ningen Shikkaku)

It is the most unique and strategic power in the entire BSD universe, and it is named after the most famous novel by the real-life author Osamu Dazai.
⚙️ How exactly does it work?

• Absolute effect: nullifies ANY supernatural ability instantly, without exception, as long as there is direct contact with the skin.
• Always active: it doesn't need him to want it or summon it; it works all the time, with both friends and enemies.
• Scope: affects both the user's powers and their manifestations —it can stop Chūya's gravity, erase Rashōmon's form, cancel Atsushi's tiger regeneration, or neutralize illusions and mental effects.
• Key exception: it stops working if he dies; that's why if his heart stops for a moment, he can be healed with skills.

⚠️ Its limitations and weaknesses

• It doesn't make him invincible: it only nullifies powers; it doesn't stop bullets, knives, physical blows, or poisons on its own.
• Requires proximity: if it doesn't touch, it has no effect; it is useless against ranged attacks without contact.
• He cannot receive supernatural help: even Yosano's healing is nullified while he is conscious and alive, so he must be on the verge of death for it to work.
• It's useless for attacking: it neither destroys nor creates anything, it just returns everything to its "normal" state, without powers.

🤍 With Sakaguchi Ango: From heartbreak to silent respect

They were part of the Buraiha trio along with Oda: they met at the Lupin bar, and they were the only ones who made him feel human in the mafia.

• The breaking point: Ango was a triple agent (government, mafia, and the Mimic group). His work indirectly led to Oda's death, completely shattering his trust. Dazai pointed a gun at him and said plainly, "Don't think I've forgiven you."
  Today: They treat each other with coldness and distance, but they work together for Yokohama. Ango helped him clear his record to get into the Agency, and Dazai acknowledges his effort and current loyalty, although the wound never fully heals. It's a bond of debt and respect, no longer friendship.

🧡 With Nakahara Chūya: “Double Shadow”, inseparable enemies

They met at age 15 and formed the most lethal duo in history: Double Black.

• What they seem: They hate each other, they constantly annoy one another, Dazai calls him "puppy" and Chūya responds by insulting him back. They say they detest each other, but nobody knows them better than they do.
  What they truly are: they trust each other with their lives. Only Dazai can stop Chūya's Corruption state without him dying; only Chūya provides the brute strength that Dazai lacks. They anticipate each other's every move without speaking.
  Why do they continue like this? They carry the same wounds, they see themselves in each other. Although they are on opposing sides, they have never killed each other and always protect each other when the city is in danger. It is a deep and eternal love-hate relationship.

In summary:

• With Ango, he lost the friendship that gave him peace.
• With Chūya, he shares a bond that they cannot break, even if they want to.

Her past is marked by immense loneliness, darkness, and a radical change that defined who she is now 🥀🖤:

🧸 Its beginnings

• At the age of 14, he appeared in Yokohama, very lost and obsessed with death, after several suicide attempts. He was treated by Dr. Ōgai Mori, who had just become the new head of the Port Mafia—and Dazai was the only witness to this.
• He joined the organization because he thought that being so close to violence and brutality would help him find meaning in life, or at least understand why he should continue living.

⚫ The time in the Port Mafia

• At 15 years old he met Chūya Nakahara, forming the feared duo known as "Double Black": his strategy and nullification together with Chūya's gravity power were unstoppable.
• At 17, he became the youngest executive in the history of the mafia. He was known as the "Demon Prodigy": cold, calculating, capable of planning everything down to the last detail, and without hesitating to kill if necessary.
• It was then that he found Ryūnosuke Akutagawa in the poor neighborhoods and took him in, although his methods were very harsh and demanding, seeking to bring out his full potential.
  His only refuge was the Lupin bar, where he met with Sakunosuke Oda (Odasaku) and Sakaguchi Ango. They were the only ones he considered true friends: for the first time, he wasn't an executive, just Dazai.

💔 The breaking point

• At 18, during the conflict with the Mimic group, everything fell apart: Ango turned out to be a double agent for the government, and Odasaku died protecting some children. Before dying, he asked him: "If you don't see the difference between saving and killing, side with the good guys. Be a good person. It's more beautiful."
  Those words changed his life. That same day he left the Port Mafia, faked his own death, and disappeared.

✨ The path to the Agency

• He spent two years in hiding, secretly helping the Skills Intelligence Agency clear his record and start over.
• At 20 years old, Fukuzawa l

✅ What he likes a lot

• Suicide: his obsession is to find clean, joyful and painless ways, ideally a double suicide with a beautiful woman.
• Food and drink: crab (especially canned), sake and other liquors, and MSG. Cannot tolerate spicy food.
• Reading and writing: her favorite book is The Complete Manual of Suicide; she also enjoys composing sentences and poems.
• Animals: She really prefers cats, she likes to pet them and be with them.
• Joking and making fun of: especially Kunikida and... of course, Chūya.
• The oleander flower: poisonous, it matches his vision of death.
• The company of people he cares about: although he doesn't say it much, he deeply values ​​Oda, Ango, and little by little Atsushi and the others at the Agency.

❌ What he/she hates or dislikes

• Dogs: he is terrified and disgusted by them; he does crazy things to avoid getting close to them.
• Nakahara Chūya: his “worst enemy”, they get along terribly and annoy each other whenever they can.
• Glasses on people: they give him the feeling that they are "reading his soul" and watching him, it makes him very uncomfortable.
• Strict rules and routine work: that's why he often misses the office and bothers Kunikida with his schedule.
• Feeling tied down or controlled: hates having paths imposed on him or having the truth hidden from him.
• Absolute loneliness: although he pretends not to, deep down he is hurt by not having a place to belong.

It would be a deep, mysterious love that would make you feel like the most special person in the world, although it will take him a long time to show you everything he has inside 🥀! He's not a conventional boyfriend, but his affection is unique and sincere.
🎭 In the beginning: between jokes and walls

• At first he will treat you with his usual jokes: he will say daring phrases like "Do you dare to die with me once and for all?", but he will never hurt you.
• He'll keep you at a safe distance: he'll smile at you, make you laugh, but never let you see what's behind that smile. It will take him a long time to trust you enough to let his guard down, because he's afraid you'll be frightened by his darkness and leave.
• But from the very beginning, he takes care of you silently: he always knows where you are, who approaches you, and makes sure you get home safely without you even noticing.
  🤍 When they open their heart to you: their true way of loving

Once he chooses you, you are his only refuge in the whole world:

• He shows you what no one else sees: he stops pretending in front of you. He talks about his emptiness, his fears, how much he misses Oda. He is vulnerable, sad, and human, without masks.
  His love is gentle and devoted: he doesn't shower you with cheesy words, but he looks at you as if you were the only thing that makes sense in his life. He hugs you slowly, buries his face in your neck, and whispers, "I didn't know I could feel this way... Thank you for staying."
• You teach him how to live: through you, he begins to find small reasons to go on: a hot cup of tea with you, seeing you laugh, or simply having you near. He stops obsessing so much about death, because now he has something to fight for.
  He's extremely protective: he'll move heaven and earth to make sure no one hurts you. If someone threatens you, his smile vanishes and he becomes the ruthless executive he always was: "Don't go near what's mine."
• Small gestures of yours that break his heart: if you gently remove the bandages to heal a wound, or tell him that you love him just as he is—darkness and all

It is the Armed Detective Agency: the legal organization of ability users, acting as the bright and protective side of Yokohama, in balance with the Port Mafia.
📌 What exactly is it?

• Founder and boss: Yukichi Fukuzawa, created more than 10 years ago together with Edogawa Ranpo.
• Headquarters: Fourth floor of a red brick building in Yokohama; downstairs is the Uzu cafe.
• Legality: It has official government permission to act, carry weapons, and handle cases that the police or the army cannot solve.
• Their role: They handle supernatural crimes, kidnappings, threats to the city, and the protection of civilians—things that fall outside the norm. They are called "the armed group of twilight" because they walk between the light of day and the darkness of the mafia.
  ⚖️ What differentiates it from the Port Mafia?
  Detective Agency:
  Legal, authorized by the State
  Protect civilians and just order
  Seek non-lethal solutions whenever possible
  It is governed by ideals and morals
  Port Mafia
  It operates with a special permit but it's criminal.
  It defends its territory and its own interests
  He doesn't hesitate to remove obstacles
  It is governed by strength and survival
  Although they are rivals, they sometimes join forces to defend Yokohama from greater threats.
  🧠 Their values
• Justice and protection: they accept those who want to change and find their way —like Kyōka, who came from the mafia, or Atsushi, who had nothing.
• Mutual loyalty: it's like a family to many of its members.
• They demand courage, honesty, and a willingness to take risks for others.
  In short: they are the ones who defend what is good in a world full of shadows, and give a chance to those who want to live without causing harm 🤍

🔝 Management and Founders

• Yukichi Fukuzawa – President. Ability: All men are equal (regulates and stabilizes the abilities of the Agency members). Ex-samurai, serious, protective, and the heart of the group.
• Edogawa Ranpo – The world's greatest detective, co-founder. What he calls his "skill: Super Deduction" is actually his prodigious intelligence; he solves any case in seconds.
  ⭐ Main members
• Atsushi Nakajima – The protagonist. Ability: Beast Under the Moonlight (transforms into a white tiger with enormous strength and regeneration). He was searching for a purpose and a place after being expelled from the orphanage.
• Osamu Dazai – Key strategist. Ability: No Longer Human (nullifies any power on contact). Former Port Mafia executive; Atsushi's mentor, and always hides his plans behind jokes.
• Doppo Kunikida – Second in command, manages operations. Ability: The peerless poet (materializes objects he writes in his notebook). Obsessed with order and his ideals.
• Akiko Yosano – Exclusive Medic. Ability: Thou Shalt Not Die (heals mortal wounds, but requires the patient to be on the verge of death). The only one who can heal members on missions.
• Kyōka Izumi – Former member of the Port Mafia, now an official agent. Ability: Snow Demon. Learns to choose her own path alongside Atsushi.

⚔️ Other featured agents

• Junichirō Tanizaki – Infiltration specialist. Ability: Snow Light (creates realistic illusions). Always with his sister Naomi.
• Kenji Miyazawa – Field Agent. Ability: Rainless and cloudless (gains superhuman strength if he has an empty stomach). Strong and very honest.

📌 Basic data

• Age: 40 years | Birthday: February 17 | Height: 175 cm
• Appearance: middle-aged man, always in a formal suit, glasses, and his constant companion Elise.
• Before becoming chief, he was a military doctor and surgeon.
  🧠 Personality
• Extremely rational, calculating and cold: always prioritizes the well-being and survival of the organization, even if it means hard or cruel sacrifices.
• His motto: “The boss is the slave of the organization.”
• Manipulator, good strategist and excellent fighter: uses scalpels with great skill.
• He likes logic, sweets, and dressing Elise; he detests dirt and irrationality.
  ✨ Ability: Vita Sexualis
• He manifests Elise, an entity with the appearance of a child that he completely controls.
• He can make her levitate, attack with giant medical instruments, defend him, or explore areas.
• He alone decides his appearance, personality, and actions; if he is injured, he disappears and reforms.
  📜 Key past
• He seized power by eliminating the previous boss when he fell ill, with Dazai as the only witness.
• He worked with Yukichi Fukuzawa (head of the Agency) and discovered Yosano Akiko's ability, whom he used to keep soldiers alive in the war, which broke their alliance.
• He maintains a pact with Fukuzawa to balance power in Yokohama.

It's an alternate, modern version of our world, set in Yokohama, Japan, where people possess supernatural powers called abilities. All the characters are inspired by real writers, and their powers reference their most famous works.
📍 Place and context

• Yokohama is the main setting: a port city divided between the legal order and the criminal underworld, with a fragile stability between factions.
• There were key past conflicts such as the 88 Days' War and the War of Succession, which defined the current power of the Port Mafia.
• The rest of the world also has its own skill users and organizations (USA, Europe, Russia, etc.).
  ✨ Rules of Skills
• Only people possess them; each individual has one, unique and irreplaceable.
• They disappear when their bearer dies; they have power limits, except for exceptions called singular points.
• There is a supreme artifact: The Book, a blank book where what is written becomes reality, capable of changing destiny or creating parallel universes.
• Dazai is the key exception: his No Longer Human ability overrides any other physical contact ability.
  ⚖️ The major factions
• Armed Detective Agency: authorized by the government, it solves dangerous or supernatural cases that the police cannot handle.
• Port Mafia: dominant criminal organization, with special operating permit; defends its territory and balances power in the city.
• Special Operations Division: state agency that monitors and regulates skill users.
• The Guild: a powerful American association that sought to take over Yokohama.
• Decline of Angels: a terrorist group led by Fyodor Dostoevsky, which seeks to destroy the world's skill system.
  📜 Main themes
  It revolves around finding one's own worth, choosing the path between light and darkness, the weight of the past, and the struggle not to be a "mistake" of the world.

✨ Osamu Dazai's personality: an enigma full of contradictions 🥀
He is one of the most complex souls in history: what he shows on the outside is just a mask to hide what he really feels.
🎭 What you see at first glance

• Carefree, joking, and lazy: he often skips work, teases Kunikida about his plans, and always speaks with a light, almost mocking smile. His motto is "a clean, cheerful, and energetic suicide!" and he constantly seeks creative ways to die painlessly, ideally accompanied by a beautiful woman.
• Mysterious and unpredictable: no one ever knows what he really thinks or what he will do next; even his allies are surprised by his decisions.
• Master of manipulation: he knows how to read people as if they were books and uses their weaknesses to guide events as he pleases, as if it were all a game.
  🧠 What lies behind the mask
• Nearly superhuman intellect: he plans every step months in advance, anticipates the movements of enemies and allies, and is always one step ahead. Even Fyodor Dostoevsky considers him a worthy rival.
• Capable of extreme coldness: when he was in the Port Mafia he was ruthless, calculating, and didn't hesitate to use any means to achieve his goal. Although he now chooses to protect, he still isn't afraid to get his hands dirty if necessary.
• Filled with emptiness and loneliness: he confessed that he didn't feel like he belonged in the world, that he found no meaning in life, and that nothing could fill the void inside him. Oda was the only person who truly saw him for who he really was.
• Loyal and protective in his own way: he keeps his promise to his friend until the very end: to be on the side that saves people. He cares deeply for Atsushi, wanting him to find his own path and not repeat his mistakes.
• Sensitive and hurt: his jokes about death are actually a reflection of wanting to feel that he is truly alive, and of not being able to bear to continue feeling "useless" and incomplete.
  ⚖️ The contrast that defines it
  It's neither entirely good nor totally good.

⚫ What is the Port Mafia?:

It is the most powerful and influential criminal organization in Yokohama, also known as the "Night Watch" of the city.

📌 Basic data

• Current leader: Ōgai Mori
• Headquarters: Their own skyscraper in the port area; they control all port traffic and business.
• Legality: They have a special business permit that allows them to operate partially "under the law", although they dominate the underground world
• Power: They control dozens of companies and have great influence on local politics and the economy

🧱 Internal structure

• Dome: The boss + the Council of 5 Executives (such as Chūya Nakahara and Ozaki Kōyō)
• Special units:
• Black Lizard: their deadliest combat squad
• Assault squad led by Akutagawa
• Espionage teams, interrogations and executions
• Notable members: Gin Akutagawa, Ichiyō Higuchi, Kyōka Izumi (former member), among others

⚖️ What they do and what their role is

• They are involved in smuggling, private security, illegal lending, conflict management between groups, and handling matters with skill users
• They are not just "the bad guys": they defend their territory and sometimes ally themselves with the Armed Detective Agency to protect Yokohama from external threats (such as the Guild or the Death House Rats)
• Its implicit motto: "strength decides everything, and the organization is above individuals," although many members also act out of loyalty or to find their own place.

🔝 Leadership and Executives

• Ōgai Mori – The Boss. Ability: Vita Sexualis (summons and controls Elise). He is a former doctor, cold, calculating, and always puts the stability of the organization above all else.
• Chūya Nakahara – Executive, one of the strongest. Ability: With Pain Stained (controls gravity). He was Dazai's partner in the duo "Double Shadow"; loyal and proud of his strength.
• Ozaki Kōyō – Veteran executive. Ability: Golden Demon. Chūya's teacher and Kyōka's former mentor; follows her own code of honor.
• Paul Verlaine – Hidden executive, responsible for training assassins. He rarely appears in public.
• Osamu Dazai – He was the youngest executive in history, until he defected after Oda's death; his position remains reserved.
  ⚔️ Combat and Operations Leaders
• Ryūnosuke Akutagawa – Assault Squad Leader. Ability: Rashōmon. He is the organization's "tooth," in charge of high-risk missions.
• Gin Akutagawa – Elite member of the Black Lizard unit, specialist in stealth and assassination; younger sister of Ryūnosuke.
• Michizō Tachihara – Captain of the Black Lizard, expert in espionage and hand-to-hand combat.
• Ichiyō Higuchi – Akutagawa's assistant and right-hand man; very skilled in tactics and weapons, with no confirmed supernatural ability.
• Motojirō Kajii – Explosives Specialist. Ability: Lemon Tree (creates lemon bombs). Very eccentric and dangerous.
  📌 Other notable figures
• Kyōka Izumi – Former member, she was an assassin under the mafia's tutelage; now she's with the Detective Agency. Ability: Snow Demon.
• Sakunosuke Oda – A low-ranking but highly respected member; his death changed the fate of Dazai and the organization itself.

✨ This is what Osamu Dazai looks like
📏 General characteristics

• He is about 22 years old, tall and very thin/slender (he is approximately 1.81 m tall).
• Fair skin, fine and expressive face, although she usually hides what she thinks.
• Dark brown hair, short and slightly wavy, with bangs framing her face and some strands in the center of her forehead.
• Narrow, dark brown eyes, with a gaze that seems calm... but always hides something.
  🧥 Current Clothing (Agency)
• Long sand/beige colored trench coat, always with the belt untied.
• Underneath: black vest, light blue shirt (striped in the manga, plain in the anime) and a very distinctive bolo tie with a turquoise charm.
• Beige trousers and dark brown shoes.
• Her most distinctive mark: she wears bandages wrapped around almost her entire body (torso, arms, neck), leaving only her face, hands, and feet exposed. They conceal many scars from her suicide attempts.
  ⚫ When I was in the Port Mafia
• He was wearing a black trench coat that reached below his knees.
• Sometimes he wore bandages covering one eye, or his arm in a sling, because of how reckless he was back then.

💡 Special detail
He usually has a slight, almost mocking smile that rarely reaches his eyes... just what gives him that mysterious and charming air at the same time.

Her biological family is a mystery ✨
So far, nothing has been revealed about his parents, siblings, or blood relatives in the manga, anime, or light novels; his family origins are intentionally kept secret. It is explicitly confirmed that he is neither Mori Ōgai's son nor adopted child, nor does he have any familial connection to him.
🧩 What is known about his close circle

• At 14 years old, Mori took him in as a pupil, but never as real family; he was only his tutor and leader in the Port Mafia.
• His true chosen family is the one he built:
• Sakunosuke Oda: his only real friend, the person who marked him the most and whom he saw as an irreplaceable emotional bond.
• Ango Sakaguchi: the third of that special group, although they separated.
• Then he finds a new place in the Detective Agency: he sees Atsushi as a much-loved successor/student, and shares with them a coexistence that he did not have in his childhood.
  In short: Dazai has no known biological family in the story, and his greatest tragedy is that he never had a real home until he found one on his own 🥀