Armed Detective Agency

Name: Osamu Dazai Gender: Male Age: 22 Birthday: June 19 Height: 181 cm (5'11") Hair Color: Dark brown Eye Color: Dark brown Affiliation: Armed Detective Agency (formerly Port Mafia executive) Ability: No Longer Human — nullifies any other Ability upon contact, rendering most supernatural attacks useless against him.

Personality: Dazai is a walking contradiction—intelligent and perceptive, yet eccentric and often acting like a complete fool. He has a morbid obsession with suicide and often talks about elaborate double-suicide scenarios (usually involving beautiful women). Despite his carefree demeanor, Dazai is cunning, calculating, and an exceptional strategist. His real thoughts and feelings are often hidden under layers of sarcasm, jokes, and manipulation. He’s haunted by his past and bears the weight of the things he did as a high-ranking Port Mafia executive.

Background: Dazai was once feared as the youngest executive in the Port Mafia, known for his ruthlessness and brilliance. After a mysterious shift in his outlook (sparked in part by his friend, Oda Sakunosuke), he left the mafia and joined the Armed Detective Agency. Despite his strange personality, he plays a vital role in solving complex cases and guiding members like Atsushi.

Likes:

Suicide jokes (dark humor)

Hot springs

Needling others, especially Kunikida

Reading (especially existential literature)

Dislikes:

Serious, overly-optimistic people (though he pretends otherwise)

His own past

Being ignored

Living without purpose

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Name: Atsushi Nakajima Gender: Male Age: 18 Birthday: May 5 Height: 170 cm (5'7") Hair Color: Silver/White Eye Color: Light purple-gray Affiliation: Armed Detective Agency Ability: Beast Beneath the Moonlight — allows him to transform parts or all of his body into a white tiger, granting enhanced strength, regeneration, and agility.

Personality: Atsushi is kind-hearted, selfless, and deeply compassionate. Despite his troubled past, he constantly tries to do the right thing and protect others. He struggles with self-worth and guilt due to years of emotional abuse at the orphanage where he grew up. However, as he grows closer to the members of the Armed Detective Agency, especially Dazai and Kunikida, he becomes more confident in himself and his abilities. He’s determined and courageous, often throwing himself into danger to protect the innocent.

Background: Atsushi was kicked out of the orphanage he grew up in and left to starve. When he was on the brink of death, he saved a drowning man, who turned out to be Osamu Dazai. This encounter led him to join the Armed Detective Agency. Over time, he discovers that he is the host of a powerful ability tied to a mysterious white tiger and that his existence is being targeted by various organizations, including the Port Mafia and the Guild.

Likes:

Helping others

Eating (he was starved as a child, so he appreciates food deeply)

His comrades in the Agency

Dislikes:

Conflict and unnecessary violence

Being called useless or weak

His traumatic past

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Name: Doppo Kunikida Gender: Male Age: 22 Birthday: August 30 Height: 189 cm (6'2") Hair Color: Blonde Eye Color: Green Affiliation: Armed Detective Agency Ability: Doppo Poet — allows him to bring objects written in his notebook into reality, as long as they can reasonably fit within its pages (e.g., small weapons, tools).

Personality: Kunikida is the embodiment of discipline and structure. He's an idealist who strictly follows his personal "Ideal Notebook," which contains detailed schedules and life goals. Logical, principled, and serious, he strives to live a life of justice and order. He’s a perfectionist who gets frustrated by unpredictability—especially when it comes to Dazai’s antics. Despite his rigid personality, Kunikida deeply cares for his team and will risk his life to protect the innocent. He believes in a world where ideals can make a difference.

Background: A former teacher turned detective, Kunikida joined the Armed Detective Agency to fight for justice and uphold peace. His ability makes him a versatile combatant and problem-solver, as long as he stays calm and collected. His meticulous planning makes him the Agency’s dependable backbone, though his sense of order is often tested by his chaotic partner, Dazai.

Likes:

Planning and schedules

Cleanliness and order

Reading (especially poetry and philosophy)

Justice and moral integrity

Dislikes:

Dazai’s unpredictability and laziness

Wasting time

Unjust behavior

Deviations from his plans

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Name: Akiko Yosano Gender: Female Age: 25 Birthday: December 7 Height: 166 cm (5'5") Hair Color: Dark purple Eye Color: Red Affiliation: Armed Detective Agency Ability: Thou Shalt Not Die — grants her the power to heal any fatal injuries, but only if the person is on the verge of death. Minor injuries she cannot heal, which means she sometimes needs to… help them qualify.

Personality: Yosano is elegant, intelligent, and composed—on the surface. Underneath, she has a fierce and sadistic streak, especially when using her ability. She takes pride in her medical skills, though her patients often fear the pain required to be healed by her. Yosano is confident, sharp-tongued, and not easily intimidated, often commanding respect with her presence alone. She's also fiercely independent and protective, especially when it comes to those she considers her responsibility.

Background: Yosano served as a battlefield medic during a major war in her past, where her ability was exploited to keep soldiers alive long enough to keep fighting. This experience left a deep emotional scar and made her vow to never let her healing be used for war again. Since then, she has dedicated herself to using her powers to save lives—but on her own terms. Her experiences shaped her into a strong, sometimes intimidating figure, but also one with deep empathy and trauma.

Likes:

Tea and refined aesthetics

Literature and flowers

Strength and self-reliance

Standing up for what she believes is right

Dislikes:

War and militarism

Being underestimated

Cowardice

Being used or manipulated

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Name: Edogawa Ranpo Gender: Male Age: 26 Birthday: October 21 Height: 168 cm (5'6") Hair Color: Black with greenish tint Eye Color: Green Affiliation: Armed Detective Agency Ability: None — despite being considered an Ability user, Ranpo actually has no supernatural power. His so-called Super Deduction is pure genius-level intellect and observational skills, allowing him to solve crimes instantly once he puts on his glasses and “activates” it.

Personality: Ranpo is eccentric, smug, and incredibly confident in his deductive abilities—rightfully so, since he's essentially a human lie detector and master analyst. He often acts childishly, craving praise and snacks, and hates doing paperwork or mundane tasks. Ranpo is dramatic and theatrical when solving cases but hides a sharp, calculating mind beneath it all. Despite his quirks, he's loyal, dependable in a crisis, and deeply values the Agency and its founder.

Background: Ranpo was discovered and nurtured by the founder of the Agency, who gave him a sense of purpose and convinced him that he had a special Ability. Since then, he’s become the Agency’s top investigator, solving complex cases with little to no physical evidence. Ranpo’s belief in justice and the Agency’s mission is unwavering, though he can be a bit lazy when the case isn’t interesting enough to challenge him.

Likes:

Mystery novels and riddles

Being praised or called a genius

Snacks (especially sweet ones)

Solving difficult cases quickly

Dislikes:

Being doubted or challenged

Boring or overly simple tasks

Bureaucracy and red tape

Going anywhere without his glasses

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Name: Junichirou Tanizaki Gender: Male Age: 18 Birthday: July 18 Height: 174 cm (5'8") Hair Color: Light brown Eye Color: Brown Affiliation: Armed Detective Agency Ability: Light Snow — allows him to create illusions within a limited area. These illusions can fool sight and sound, making them highly effective for stealth, distraction, and evasion.

Personality: Junichirou is calm, soft-spoken, and often serves as the voice of reason among the younger members of the Agency. He’s reliable in a pinch and surprisingly clever, though he usually avoids the spotlight. He maintains a composed demeanor even in stressful situations and prefers a tactical, supportive role during missions. Despite his chill nature, he can be incredibly protective of those close to him and has a quiet determination that kicks in when it counts.

Background: Tanizaki joined the Agency alongside his sister, and while his ability is not geared toward direct combat, it has proved invaluable in reconnaissance and evasion. His illusions have saved the team multiple times. While not as flashy as some of the other members, he is deeply trusted and respected for his level-headed approach and loyalty.

Likes:

Peace and quiet

Movies and relaxing at home

Teamwork

His personal space (though he's used to giving it up when needed)

Dislikes:

Needless violence

Being underestimated

Conflict within the team

Overexerting himself

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Name: Kenji Miyazawa Gender: Male Age: 14 Birthday: August 27 Height: 140 cm (4'7") Hair Color: Blonde Eye Color: Golden brown Affiliation: Armed Detective Agency Ability: Undefeated by the Rain — grants him superhuman strength, but only when he's hungry. Despite his small frame, he's capable of extreme physical feats, like stopping a speeding car or lifting massive objects effortlessly.

Personality: Kenji is cheerful, innocent, and incredibly optimistic. He has a country-boy charm, always polite and straightforward, and tends to take things literally. He’s naturally trusting, believing that most people are good unless proven otherwise. This can make him seem naïve, but he's no fool—just incredibly wholesome. Despite his young age and small size, he’s fearless and dependable in a fight. His positive attitude and simplicity often bring levity to serious situations.

Background: Kenji grew up in a peaceful rural village, where he did hard labor on farms and lived closely with nature and community. His strength developed naturally, and his experience working with animals and people made him great at reading emotions and keeping calm in tense moments. When he moved to the city and joined the Agency, he brought his rural values with him—honesty, kindness, and a hands-on approach to problem-solving.

Likes:

Farm animals, especially cows

Fresh food (especially rice and milk)

Helping others with physical tasks

Sunshine and being outdoors

Dislikes:

Dishonesty

Hunger (it’s when he’s strongest, but also his least favorite feeling)

Pollution and city noise

People hurting others for no reason

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Name: Kyouka Izumi Gender: Female Age: 14 Birthday: November 4 Height: 148 cm (4'10") Hair Color: Dark purple Eye Color: Red Affiliation: Armed Detective Agency (formerly Port Mafia) Ability: Demon Snow — allows her to summon a sword-wielding phantom woman who attacks on command via her phone. Initially uncontrollable, Kyouka learns to master this power over time.

Personality: Kyouka is quiet, reserved, and serious, often appearing emotionless or distant. She struggles with guilt and identity due to her violent past, and is initially unsure whether she deserves a peaceful life. Despite her cold exterior, she has a gentle and kind heart, especially when it comes to protecting others. She is determined to change and live a life that doesn't involve killing, and she deeply values the second chance the Agency has given her.

Background: Kyouka was raised and used as an assassin by the Port Mafia, manipulated into believing her only value came from killing. After meeting Atsushi and joining the Armed Detective Agency, she begins to learn what it means to live freely, make choices, and connect with others. Her journey is one of redemption, self-acceptance, and discovering her own strength outside of violence.

Likes:

Rabbits (she has a pet rabbit named Lucy)

Strawberry daifuku (mochi)

Tranquil, quiet places

Learning about the outside world

Dislikes:

Her past actions

Being treated as a weapon

Loud or chaotic environments

Unnecessary violence

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