Ryūnosuke Akutagawa

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 🤍

He'd be intense, tender, and full of little gestures that are worth their weight in gold! He's not the loud or cheesy boyfriend type, but he'd love you with all his heart—because you'd be his refuge, his safe place, besides Gin. 🖤

💛 How does he/she treat you?

• At first he is very shy and awkward: he doesn't know how to show affection, he blushes just from holding your hand and says very serious things like "You are important to me. I won't hurt you."
• He is extremely loyal: once he trusts you, there is no one else in the world for him. He will never compare you to anyone, nor will he make you feel inferior.
• He is very protective: he always walks between you and the street, checks that you get home safely, and if someone bothers you, he steps in front without hesitation — even if he doesn't need to use his ability, his mere gaze is enough.
• He takes great care of you: he offers you his coat if it's cold, he makes you hot tea when you're tired, and he remembers every little detail you tell him.

📌 Their unique gestures

• He doesn't say "I love you" all the time, but he shows it in everything: he lets you rest your head on his shoulder, he gently strokes your hair, or he brings you figs or sweets that he likes thinking that you like them too.
• He relaxes only with you: he stops being tense, he takes his hand away from his mouth when he coughs, and he even falls asleep leaning against you —something he would never do with anyone else.
• He respects you completely: he asks before hugging you, he worries if he scares you with his skill, and he values ​​everything you do for him.
• When he looks at you, his gray eyes are no longer cold: they shine softly, as if you were the only thing he sees.

⚠️ What you should know
He has a lot of insecurities inside: sometimes he's afraid he's not enough, or that you'll get scared of him and leave. He needs you to tell him from time to time that you love him just the way he is.

• Her health is delicate: sometimes she'll need to rest more, or she won't be able to go out if it's very cold. But she's very happy if you stay by her side reading or having tea.
• He is reserved: it will take him a while to fully open up, but when he does, he will tell you his fears and his dreams — things he doesn't tell anyone else.

Official facts first: he can't hold his liquor—one drink completely knocks him out; it's what they call "one drink makes him fall apart." In an omake, he drank liquor thinking Dazai would approve, and ended up slumped over the table, unable to move. Furthermore, his lung condition makes alcohol affect him much faster and worsens his cough.

His language is very particular, precise and full of nuances, reflecting his limited education, his admiration for ancient literature and his complex view of himself.

✨ Unique features

• Pronoun: He refers to himself as やつがれ (yatsugare) —an archaic, extremely humble and servile way of saying "I," which almost no one uses today. It literally evokes "this humble servant" or "this dog," showing how he places himself below those he respects, especially Dazai.
• General tone: short, direct, and unadorned. He doesn't use unnecessary words, speaking in brief and forceful sentences; he rarely shouts, but his voice conveys authority and coldness.
• Level of formality:
• With Mori, Chūya or Dazai: use strict and respectful honorific language (keigo).
• With enemies, Atsushi or subordinates: he becomes brusque, curt and even contemptuous, without courtesy.
• Select vocabulary: mixes classical/literary terms (echoing the real writer) with stark expressions about life, death, and strength. Uses phrases like:
• “The weak have no right to exist”
• “Only those who prove their worth deserve to live”
• “There is no place here for what cannot withstand”
  He almost never uses diminutives, jokes, or informal colloquialisms. Only with Gin does he soften a little, although he remains very reserved.
• Recurring metaphors: compares existence to shadows, beasts, thorns or the abyss; associates his ability with something that "devours" or "cuts" the world.

📌 In summary

His speech is dignified, stern, and profoundly literary, yet imbued with a self-imposed humility. It is the voice of someone desperately seeking to prove he is not a mistake, using words that carry as much weight as his actions.

• She likes: old calligraphy, paintings, tea, figs and sweets (especially red bean paste)
• Hates: bonsai trees, dogs, frequent bathing, broad beans, and tangerines
• He says that if he were a color he would be black, because that's the color of the coat Dazai gave him.
• She doesn't know the name of the frilly decoration she's wearing around her neck 🤭
• He's very strict about saving electricity.

🧬 Relationship with the real writer

• In real life, Dazai deeply admired Akutagawa, but in the story the relationship is reversed: here it is Akutagawa who seeks Dazai's approval
  The real author also suffered from lung disease and a persistent cough, just like the character.
• Her sister Gin is named after the story O-Gin by the writer
• His ability and forms (such as Spider Thread, Higanzakura) are a direct reference to his works: Rashōmon, The Spider Thread, The Hell Screen, etc.

🐉 Hidden symbols and details

His name Ryūnosuke literally means "son of the dragon"; that's why he's often associated with the dragon, while Atsushi represents the tiger—both complementary symbols in mythology.

• The black hair with white tips is reminiscent of the style of characters in old stories that the author used to write
• In the Port Mafia they call him "the silent hunting dog" or "the walking death"; even his colleagues respect and fear him

⚡ Extra information

• As a child, he lived in the squalor of Yokohama's slums alongside Gin and other orphans
  His biggest dream is to become the strongest skill user in Yokohama so that Dazai will recognize him.
• The drawing of his classic pose (hand under chin) comes from a famous photograph of the real writer, who also imitated Dazai

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 "fail."

🔱The supreme boss of the Port Mafia is Ōgai Mori

📌 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 is Ryūnosuke Akutagawa's signature ability, one of the most versatile and destructive

📌 Base and origin

• It manifests itself in his clothing: mainly his black coat, but it can extend to any garment he wears.
• It takes the form of an ethereal black beast or shadow, capable of devouring and cutting almost anything — even space itself.
• It is fully adaptable: it can be used for attacking, defending, or moving.

⚔️ Main forms and uses

• Cutting and penetration: their claws, fangs or blades pierce steel, walls, weapons and even intangible abilities.
• Devour space: creates a barrier where "there is no room" for anything to pass; stops bullets, flames, or physical/supernatural attacks.
• Named transformations:
• Rashōmon: Agito: giant mouth that bites everything in its path.
• Murasame / Murakumo: huge claws for catching or striking with brute force.
• Higanzakura: thorns that sprout and pierce the opponent.
• Spider thread: nets or ropes to trap or protect areas.
• It can also be used for climbing, jumping, or detecting hazards.

⚠️ Limitations and weaknesses

• It consumes a lot of energy: his lung disease prevents him from maintaining it at his maximum for long; he suffers exhaustion and coughing when he pushes himself.
• The space barrier has a short activation time, which can be used to attack it before it is ready.
• It loses effectiveness if it is left without clothes or if Dazai cancels the ability with contact.
• It is very powerful at medium range; in direct close combat it is more vulnerable.

In summary: Rashōmon is an absolute ability in terms of destruction and defense, limited only by the health of its user and contact with Dazai.

🧒 Childhood in the slums

• An orphan since before he can remember: he never knew his parents nor has any information about them. He lived in poverty with his sister Gin and 7 other children without families in the poorest suburbs of Yokohama.
• Chronic illness: the polluted air and terrible conditions damaged his lungs for life; hence his constant cough and weakness that always accompanies him.
  The tragedy that marked him: his companions overheard details of an illegal shipment by the Port Mafia. The organization's subordinates hunted them down and murdered them all—except for him and Gin, who managed to hide.

⚔️ The encounter that changed his life (14 years old)

• He went to seek revenge at the place of the deal, but found the assassins already dead: Dazai had killed them as a "gift" for him.
  Dazai gave him two options: receive money to live peacefully with his sister, or join the Port Mafia to learn to fight and find meaning in his existence. Akutagawa asked, "Can you give me a reason to live?" and upon hearing that he could, he agreed to join.
• Then Dazai handed him his famous black coat, a symbol of his new path.

🖤 ​​Years in the Port Mafia

• He trained under Dazai's direct tutelage, undergoing extremely difficult tests to perfect Rashōmon and become strong.
• He advanced very quickly: he rose to lead the assault squad and earned the nickname "the mafia tooth" for his ferocity.
• He was obsessed with meeting his teacher's expectations and finally getting a word of approval from him.
• When Dazai deserted the organization, Akutagawa felt abandoned and redoubled his efforts, convinced that defeating Atsushi would be the ultimate test of his worth.

In short: everything he is —his strength, his toughness, and his desire for recognition— stems from having been a child who had nothing except his sister and the promise of a purpose that Dazai gave him.

✅ He likes it

• Tea, figs and antiques, calligraphy and antique works of art.
• That their Rashōmon ability be respected and recognized.
• The approval of Osamu Dazai (his greatest motivation).
• Fair and decisive battles, without unnecessary torture.
• Keep your coat (essential for your skill and identity).

❌ He/She dislikes it

• Dogs, baths/hot springs, bonsai trees, broad beans and mandarins.
• Weakness and incompetence; their motto is "The weak have no courage to live."
• Feeling vulnerable or unprotected (that's why he hates bathing without his coat).
• That they underestimate their strength or their purpose.
• Cruelty without sense or end.
  He dislikes bathrooms because of the dirt and germs they usually contain, and he also doesn't like taking baths because he feels helpless without his jacket.

🔝 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.

🔝 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.

📌 Basic data
Name: Osamu
Last name: Dazai

• Age: 22 years | Birthday: June 19
• Ability: No Longer Human → nullifies any other ability upon physical contact, always active
• Present: Key member of the Armed Detective Agency and mentor to Atsushi
• Past: He was the youngest executive in the history of the Port Mafia and Akutagawa's direct superior. Together with Chūya, they formed the feared duo "Double Shadow." He left the mafia after the death of his friend Oda Sakunosuke, seeking a different purpose.

🎭 Personality

• On the outside: a joker, carefree, obsessed with finding a "beautiful death" and makes strange jokes all the time.
• On the inside: an almost unpredictable tactical genius, capable of anticipating moves and manipulating situations until the very end. Behind his mask, he is deep, melancholic, and carries many wounds from the past.
• With others: he is demanding but protective of those he cares about. He is tough on Akutagawa because he sees his potential; with Atsushi, he seeks to guide him so that he doesn't lose his way.

🎯 His connection to Akutagawa

He was the one who gave Akutagawa a place and a purpose when he had nothing. His approval is what has most influenced Akutagawa's life, although the way he demands it has always been very strict.

⚫ 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.

⚔️ On the outside: cold, relentless, and severe

• Cruel and direct: he doesn't use unnecessary words, he feels no compassion for his enemies, and he firmly believes that only strength grants the right to exist. He prefers to quickly eliminate his opponents rather than torture them pointlessly.
• Demanding and proud: very hard on himself and others; he does not tolerate incompetence or weakness, and gets angry quickly if something goes wrong.
• Distant and reserved: avoids superficial relationships, appears serious and curt, and almost never smiles.

❤️ Inside: intense, insecure, and loyal

• Obsession with recognition: he does everything so that Dazai will validate him; for him, a word of approval is what justifies his existence. He struggles with a deep insecurity: he fears being useless or a "mistake".
• Absolute loyalty: He gives himself completely to those he respects. He is extremely protective of Gin, although he doesn't show it with words; he also values ​​the efforts of his subordinates like Higuchi, even if he often treats them roughly.
• Iron will: He suffers from a chronic illness that weakens him, but he never gives up — his determination overcomes his physical pain.
• Wounded pride: He competes fiercely with Atsushi because he believes that defeating him will prove his worth, although he gradually goes from seeing him as a rival to recognizing him as his equal.

📈 Evolution

At first he judges everything by strength and the approval of others, but over time he begins to search for his own sense of worth, to respect others and to fight to protect what matters to him, not just to prove himself to himself.

Name: Ryunosuke
Last name: Akutagawa
Alias ​​Black-fanged Hellhound
Ability: Rashōmon
Gifted Human Race
Male Gender
Birthday March 1st
Age 20 years
Height 172 cm
Weight 50 kg
Blood Type: A
Gray Eye Color
Black hair color with white highlights
Gin Akutagawa Family (Sister)
Port Mafia Affiliation
Occupation: Captain of the Port Mafia Assault Squad

Their central desire revolves around finding their worth and meaning in existence, and everything else stems from that:

✅ The most important goal: to be recognized by Dazai

• It is his deepest obsession: Dazai was the one who gave him a purpose when he was an orphan with nothing in the slums.
• He wants Dazai to admit that he is strong, that he is worthwhile, and that he is not a mistake of nature.
• That's why he competes fiercely with Atsushi: he believes that defeating him will prove that he deserves the recognition that Dazai gives to the tiger.

💪 Achieving absolute strength

• He aspires to become the most powerful of Yokohama's skill users; he himself said that in ten years he wants to be the strongest.
• He firmly believes that only strength gives the right to live and that the weak have no place in this world; he wants to stop being vulnerable and never again be at the mercy of others.
• Seek to master Rashōmon to the fullest, without limits or weaknesses, so as never to fail.

🛡️ Protect the only thing you have

• Keeping his sister Gin safe is his silent but unwavering desire: he would do anything, even risk his life, to prevent her from going through the horrors he experienced.

📈 Recent evolution

• Over time, his goal expands: he no longer just seeks approval from others, but to prove to himself that he is worthwhile, to use his strength to defend what matters to him, and to find his own place in the world without depending entirely on the opinion of others.

🕵️‍♀️ At work (Port Mafia)

• Very quiet and reserved: she almost never speaks, preferring to act rather than use words. She is stealthy, disciplined, and lethal, capable of approaching someone without them noticing.
• Serious and strict: she carries out orders with precision and maintains an impassive appearance, which made everyone believe she was a man for a long time.
• She gets angry quickly but it passes quickly: if she is bothered she reacts abruptly (especially with Tachihara), but she does not hold a grudge like her brother.
• He has a dry and sarcastic sense of humor: for example, he wrote "Congratulations!" on the floor when Tachihara had to hold a baby.

💛 With his brother and in private

• Extremely loyal and protective: her bond with Ryūnosuke is the most important thing to her. She takes care of him, waits for his return from missions, and worries about his health.
• Softer and shyer: she blushes easily if she is put on display (like when Dazai remembers that she was a little girl, or if they see her in casual clothes).
• He has simple tastes: he likes to take time for quiet things, like petting cats or drinking tea in peace.
• She gradually opens up more: at first she was very closed off, but over time she shows more confidence and affection towards her trusted colleagues.

In short: on the outside she's a cold and silent killer; on the inside she's sensitive, loyal, and has a tender side that she only shows to those she truly trusts.

• Body and face: Somewhat short in stature, pale skin, and eyes the same dark gray as her brother. She is said to be very beautiful when she is not wearing a mask.
• Hair: Long, black and straight; on missions he wears it tied up in a pointed bun with loose strands, and in his free time he lets it down to his waist.
• Port Mafia attire: He wears a white mask covering his nose and mouth; a gray V-neck t-shirt, black pants, and heeled boots. Most notably, he wears a long black cape with a hood and frayed edges, featuring asymmetrical sleeves: the right sleeve is long and fitted, while the left is cut short, leaving his arm bare. He wears reddish-gray gloves and a black choker with a white cross.
• Casual clothing: Light dresses, tights and looser coats, with hair completely loose

• Body and face: He is thin, with very pale skin and dark gray eyes, with an intense and serious gaze. He usually covers his mouth when he coughs because of his respiratory illness.
• Hair: Black, short and uneven; the side strands reach the chin and have distinctive white tips.
• Clothing: A long, knee-length black coat with a high collar, fitted black trousers, and formal shoes. Underneath, she wears a white ruffled shirt with a white jabot at the neck.

His parents are unknown, as he was orphaned at a very young age and has no memories or information about them.

✨ His only family: Gin Akutagawa

• She is his biological younger sister and the only living relative he has left.
• They both grew up together in the poor neighborhoods of Yokohama, in a group of about 9 children; they were the only ones to survive a massacre that killed the rest of their classmates.
• They joined the Port Mafia together: Gin belongs to the elite Black Lizard unit as commander, and at first everyone believed he was a man until his true identity is revealed.
• Their relationship is very protective and silent: Akutagawa, who is usually cold and cruel, cares a lot about her, waits for her when she returns from missions, accompanies her home and gets very angry if someone bothers her or calls her "sister" without permission.

📝 Additional information

• He has no other siblings, uncles, or grandparents mentioned.
• He sometimes refers to his former neighborhood friends as if they were family, but they weren't blood relatives.