Armed Detective Agency | Port Mafia | The Guild | Rats In The House Of The Dead | Government and Gaiden | Hunting Dogs | Decay of Angels | Dead Apple | Others
Leader: Fukuzawa Yukichi
Second in command: Kunikida Doppo
Base of operations: Yokohama
First appearance: Chapter 1/Episode 1
Character sheet for the Armed Detective Agency of Bungo Stray Dogs. Characters on this page all have their names listed in Western order— given names followed by surnames.
The Armed Detective Agency (武装探偵社, Busoutanteisha)'s members have supernatural powers. They primarily take on cases that the police or the government are unable to handle, but they also do regular detective work. Their director is Yukichi Fukuzawa, but most of their day-to-day business is managed by Doppo Kunikida.
Spoilers up to chapter 37 / episode 24 are unmarked.
- Badass Crew: Don't screw with them. They will and can kick your butt into next week, should you anger them and/or target one of them.
- Five-Man Band: An interesting example, since Atsushi is the main protagonist of the series, yet isn't the leader of the Agency, meaning the roles are:
- Supporting Leader: Officially Fukuzawa, but Kunikida takes over once Fukuzawa is stashed away in Anne's Room because of a looming virus threat that would affect him and Mori, and even Ranpo fulfills this role at one point. More information about that here. Obvious spoilers.
- The Lancer/The Heart: Atsushi, who works together with Kunikida and Dazai and seems to hold the team together.
- The Big Guy: Yosano, Kenji and Ranpo. Yosano doesn't hesitate threatening people who bother her, Kenji often attacks before he thinks, while Ranpo boasts how (supposedly) powerful his Ability is.
- The Smart Guy: Kunikida and Dazai fulfill both this role. While Kunikida was a former math teacher, Dazai has shown on various moments he is a hidden genius as well.
- The Chick: Kyouka seems to be the odd one out. Her costume is the most traditional, at any rate. (not counting Fukuzawa) Tanizaki may count as well, since his Ability isn't that good for fighting, but it is good at scouting.
- Team Pet: Mii-chan, Kirako's cat.
- The Good, the Bad, and the Evil: The good to the Port Mafia's bad and the Guild's evil.
- Good Thing You Can Heal: Yosano's healing Ability means that the Agency members (minus Dazai, see Logical Weakness under his entry) can take on serious injuries and then be back on their feet within a few chapters. Additionally, regeneration is part of Atsushi's Combo Platter Powers.
- Putting the Band Back Together: In the plot of the Hunting Dogs arc, Atsushi and Kyouka try to get the other members back.
- Secret Test of Character: Each prospective member is required to pass one in order to join.
- The Hero: They're generally portrayed as the most noble and most just of all the groups.
- True Companions: For Atsushi.
- Literary references: He is named after Japanese author Yukichi Fukuzawa, and his ability is a reference to one of the texts from Fukuzawa's essay collection An Encouragement of Learning.
Height: 186 cm
Blood Type: B
Birthday: January 10
Zodiac Sign: Capricorn
First appearance: Chapter 2/Episode 2
The head of the Armed Detective Agency. His ability, "All Men are Equal," lets him suppress the abilities of his subordinates.
- Badass in Charge: He's a skilled martial artist and Kunikida's master to boot. Kunikida has never been able to beat Fukuzawa in a fight and Fukuzawa can fight off a group of assassins with ease.
- Benevolent Boss: Cares for his subordinates and will always put their welfare first.
- Big Good: Head of the Armed Detective Agency, dedicated to fighting crime and saving innocent lives.
- Coat Cape: Normally seen with a green one.
- The Comically Serious: Serious at all times, even when dealing with his workers' antics and trying to pet a cat.
- Cuteness Proximity: Hires Kyoka on the spot after she makes a cute face. Fukuzawa is also very fond of cats.
- Da Chief: A traditional Japanese equivalent (right down to the katana!) to the Agency, especially to Ranpo.
- A Father to His Men: Orders Kunikida to find Atsushi's whereabouts and rescue him, even after Kunikida states that they were too short-handed to help Atsushi. In addition, he says to the group of assassins to target only him and that he would snap the necks of anyone who tried to harm his subordinates.
- Fights Like a Normal: He's an expert martial artist and his ability doesn't help him in combat.
- Iaijutsu Practitioner: He's frequently seen holding his sword like this and he claims that he can draw it at the speed of sound.
- Kind Hearted Cat Lover: He likes cats so much that he keeps treats for them in the sleeves of his yukata.
- Kimono Is Traditional: He is always seen wearing a yukata.
- The Leader: Of the Levelheaded variety.
- Parental Substitute: He has an especially close relationship with Ranpo and looks after him like a father figure. Ranpo helped Fukuzawa figure out who killed one of his former clients in the light novel detailing originally how they met. Fukuzawa realised that because of Ranpo's genius this would happen again and created the Agency so that Ranpo would have a place to belong.
- Perpetual Frowner: Never seen smiling.
- Power Limiter: What his Ability does. 'All Men Are Equal' can also help his subordinates control their Abilities.
- The Stoic: Fukuzawa is a serious man and rarely expresses anything but calm authority.
- Literary references: He is named after Japanese author Atsushi Nakajima, and his ability is a reference to Nakajima's most famous short story, "The Moon Over the Mountain."
Height: 170 cm
Blood Type: AB
Birthday: May 5
Zodiac Sign: Taurus
First appearance: Chapter 1/Episode 1
The series protagonist, a orphan who ends up with the agency after being kicked out by his orphanage. Convinced over his life that of being worthless, he dedicates himself to his new friends and comes into conflict with Port Mafia. His ability, "Beast Beneath the Moonlight," allows him to transform into a tiger with regenerative abilities.
- Adorkable: He flails around adorably as he tries to take Kyouka out to make her feel better.
- All of the Other Reindeer: He grew up in an orphanage where everyone hated him and he suffered from severe abuse, both verbal and physical, from his caretakers, as well as bullying from the other children.
- Animal Motifs: His design was also supposed to look like a tiger, with the black and white color scheme and the belt dangling like a tiger's tail. In chapter 13, he also gets Clothing Damage that resembles tiger stripes.
- Animal-Themed Superbeing: He turns into a tiger.
- Badass Adorable: Can really give some of the stronger villains a run for their money once he figures out how to control his ability. Doesn't stop him from still being a lovable dork, though.
- The Berserker: When he transforms into his tiger form.
- Big Eater: When chazuke is involved, he can pack away bowl after bowl of the stuff.
- Chronic Hero Syndrome: He just can't turn his back on people he feels to be good inside, risking his life and livelihood on several occasions and handing himself over to the enemy in an attempt to keep his friends from getting hurt.
- Classical Anti-Hero: He starts out the show as a very unlucky boy with severely low self-esteem because of a very miserable life and lack of control over his ability. He eventually gets better.
- Combo Platter Powers: He's a were-tiger who happens to also have an amazing Healing Factor ala Wolverine.
- Comfort Food: Chazuke, a Japanese dish consisting of hot tea/water poured over rice, topped with various savoury foods like seaweed.
- Dark and Troubled Past: During his childhood he was shamefully singled out for the most mundane things and then tortured relentlessly for just existing. He is even forced to hammer a nail into his own foot (which he understandably couldn't do, but the Headmaster did it anyway). He was starved, bullied, and beaten until his self-esteem was crushed into fine powder. It's later revealed that the Headmaster did this in hopes of toughening Atsushi in preparation for facing the even crueler real world, that doesn't erase the horrendous childhood Atsushi had. He still obviously suffers from some forms of PTSD and it worsens considerably after his encounter with Q.
- Desperately Looking for a Purpose in Life: After being told that he was a leech and worthless for all of his life, Atsushi is desperate to find some meaning in his existence.
- Distressed Dude: As there's a massive reward out there for his live capture, Akutagawa eventually manages to catch him off guard and take him away, but he escapes a few chapters later. He's later captured again by the Guild this time, but freed by Lucy.
- Doom Magnet: He believes himself to be this (due to having been continously told it when he was a kid) to the point where he thinks his mere appearance causes other people to sacrifice themselves for him. It's unclear how true this is.
- Fashionable Asymmetry: His unusual haircut.
- Fingerless Gloves: He often seen wearing black ones.
- First-Name Basis: Always called by his given name rather than his surname contrary to the typical Last-Name Basis of Japanese culture.
- Friendless Background: He was raised in an orphanage without love, making it very hard for him to make friends without thinking he'll doom them.
- Good Thing You Can Heal: He's mutilated, impaled, and torn up throughout the series, only surviving due to his amazing Healing Factor.
- The Heart: He arguably brings the group together by befriending Dazai and Kunikida.
- Healing Factor: Part of his Combo Platter Powers, though it only works when he's at least partially in tiger form.
- Heroic Albino: The main hero of the show, coming with light gray hair and pale skin. Downplayed in that his eyes aren't red, and his skin isn't too white like Akutagawa. In real life, white tigers aren't albino either.
- I Want Them Alive: People within the Mafia are willing to pay top dollar for his live capture.
- Innocent Cohabitation: He and Kyoka become roomates after he saves her from Port Mafia.
- Involuntary Shapeshifting: He unwillingly and unwittingly transformed into a tiger at night before he was able to control his ability.
- Lightning Bruiser: With his ability activated, he moves way faster than a normal human can track and is a split second blur on security cameras at best. He's also strong enough to rip chunks of concrete out of the floor and toss them like frisbees, while his Healing Factor lets him survive incredible amounts of punishment before going down.
- Kind Hearted Cat Lover: Cats are listed among his likes. Admittedly, he is a cat himself...
- Living MacGuffin: There's a massive reward out there for anyone who can capture him alive. According to Fitzgerald, it's because Atsushi's ability is supposedly the key to finding a Reality-Writing Book.
- Naïve Newcomer: As the newest member of the Armed Detective Agency, he is unfamiliar with the members of the Agency or how it functions. He also lacks information on the feud between the Agency and the Port Mafia. This requires his colleagues to explain things to him (and to the audience).
- Nice Guy: He's pitifully nice at times, to the point of putting the lives of complete strangers above his own.
- Not So Above It All: Is noted to be quite gullible, and very nearly accepted Kenji's way of dealing with a case as normal and acceptable.
- Oblivious Transformation: He wasn't aware that he was the the tiger, until he ran into some members of the Armed Detective Agency.
- Only Sane Man: Comes off this way sometimes, especially when dealing with his eccentric co-workers.
- Orphanage of Fear: Grew up in one.
- Perpetual Poverty: He's usually concerned about his lack of money.
- Power Incontinence: At first, he has no control over his power and wasn't even able to remember what happened when he transformed. However, he gets over this as he's put into more and more life-threatening situations. It was later revealed that he gained the power to control his ability because he joined the Agency, which meant Fukuzawa was able to suppress it to a controllable level.
- Red Oni, Blue Oni: The Blue Oni to Akutagawa's Red Oni. Atsushi is calm, meek and gentle, while Akutagawa is violent, ill-tempered and bloodthirsty. This is reflected by how their abilities are visually represented- Atsushi's is blue, Akutagawa's is red.
- Running Gag: He frequently ends up unconscious in a particular pose, where his head is slumped against the ground, but his butt is sticking up in the air. This gag isn't present in the manga.
- Shout-Out: His ability to turn into a tiger is a reference to author Nakajima Atsushi's Sangetsuki/The Moon Over the Mountain, in which the main character loses his touch with reality while following his ambitions of becoming a poet and transforms into a tiger.
- Skunk Stripe: In the manga, Atsushi has a stripe of black in his otherwise white hair. It eventually fades out. The anime leaves it out, though most of the promo art featuring Atsushi includes it.
- Spanner in the Works: Dazai is the strong, intelligent and excentric Big Good of the Agency...if he's not wallowing in laziness and suicide attempts. So, when Atsushi comes to the Agency, free from prejudice and sticks with Dazai despite rendering himself as a Doom Magnet, he gives Dazai someone precious to fight for and thus, his motivation. Atsushi basically pulls Dazai from this behavior just by being a nice person.
- Trademark Favourite Food: Chazuke, a traditional Japanese Comfort Food that consists of tea poured over rice and topped with any number of things that's usually done just to make sure that there's no rice left sticking to the bowl.
- Technicolor Eyes: The upper half of his eyes are purple and the other is yellow.
- Unskilled, but Strong: His ability grants him great strength and speed along with a Healing Factor and the benefits of claws and a prehensile tail. However, he has little actual combat experience and thus relies on his wits and observations to get by, but generally resorts to plain old brute force.
- You Remind Me of X: Seeing a bit of himself in the young boy, in his twisted nature, the Headmaster sought to help Atsushi toughen up by doing unspeakable things to him to make sure he was able to make it out there in the cruel world. Surprisingly, Atsushi did.
- Literary references: He is named after Japanese author Shuji Tsushima, who wrote under the pen name Osamu Dazai, and his ability is a reference to one of Dazai's most famous novels, No Longer Human.
Height: 181 cm
Blood Type: AB
Birthday: June 19
Zodiac Sign: Gemini
First appearance: Chapter 1/Episode 1
The first member the Armed Detective Agency Atsushi meets. An extremely strange young man, he hopes to some day find a beautiful woman to commit suicide with. A former member of the Port Mafia, he has a history with Akutagawa and Chuuya. His ability, "No Longer Human," allows him to nullify other abilities through physical contact with either the ability or the user.
- Above Good and Evil: As observed by Oda, Dazai cares very little for the conventional ideas of good and evil. It is heavily implied that he did monstrous things as a Port Mafia executive, yet he treats cruelty as nothing but a means to an end instead of something he actively participates in for his own pleasure. He also has no problem pulling a complete HeelFace Turn and fully dedicating himself to the cause of 'helping people' once Oda urged him to become a better person, even if he still uses somewhat questionable (but far less brutal) ways of achieving his plans.
- Animal Motifs: He is commonly associated with foxes in the franchise, as he is smart, cunning but also kind of lazy. He was dressed as a Kitsune in one Youkai related merch and this official Haregi artwork also shows him with a fox. The depiction of foxes differs greatly depending on culture - from benevolent messengers and tricksters to being murderous and manipulative, a juxtaposition that much resembles Dazai himself.
- Anti-Hero: Bordered on outright sociopathic prior to meeting Oda. While he's gotten better post HeelFace Turn, he still has his moments.
- The Atoner: Shows shades of this, though whether he genuinely regrets the things he did as a member of the Mafia or simply wants to distance himself from his past for Oda's sake is left ambiguous.
- Badass in a Nice Suit: During his mafia days.
- Badass Longcoat: He wears a long trench coat and we already know that he's badass.
- Bandage Babe: They cover most of his body, and it's unknown what, if anything, they're covering up.
- Big Brother Mentor: He's the closest to Atsushi and is willing to help him however he can.
- Blessed with Suck: His ability is most useful in combat situations, but it's always active except in very specific extreme circumstances, which means Dr. Yosano can't easily heal him using her ability if he gets too banged up.
- Boring, but Practical: His ability isn't very flashy, dramatic, or interesting compared to the abilities of his colleagues in the Agency and former colleagues in the Mafia, but it's extremely useful in fights, has few known drawbacks, and allows his allies with dangerous or hard-to-control abilities to make more effective use of them.
- Breakout Character: Is by and far away the most memorable and well-liked character in the franchise for his quirky personality, mysterious past, and cool ability, appearing in even more promotional material than Atsushi, the protagonist. Both seasons 2 and 3 of the anime spend a third of their runtime animating prequel light novels focusing on Dazai's time in the Port Mafia (season 2 on his final days before his defection and season 3 covering how he first met Chuuya).
- Brilliant, but Lazy: Not as bad as Ranpo, but good luck getting him to actually do his paperwork.
- Broken Ace: Whenever he actually gets to do something, he's smart, talented and strong, and there aren't many people who at least begrudgingly accept him. He is also a Stepford Smiler who tortures himself with the memories of his past failures and his lost friend.
- Bunny-Ears Lawyer: Despite his odd hobbies, Dazai is actually a very competent detective. His deductive abilities aren't too shabby and he possesses an extremely useful ability that gives him an advantage against other ability users.
- Cheshire Cat Grin: Dazai rarely stops smiling, and his smiles get very unsettling in serious or darker moments, frequently also dipping into Psychotic Smirk territory.
- The Chessmaster: Purposely manipulated events so to ensure a new duo of Atsushi and Akutagawa would rise to eventually combat an evil (implied to be Dostoyevsky.
- Child Prodigy: Was the youngest person in Port Mafia history to become an Executive.
- Chivalrous Pervert: Seen flirting with women on multiple occasions, although he does this by offering to commit double suicide with them. He's never less than a gentleman though.
- Cloudcuckoolander: Dazai is a rather eccentric man that enjoys researching and trying out various suicide methods for fun.
- Curtains Match the Window: He has dark brown hair and eyes.
- Death Seeker: Maybe. Played straight during his mafia days. He is said to have grown bored of the world, and is seeking out something that could defy his expectations and hopefully kill him in the process. It is ambiguous whether he still thinks that way or not after leaving the mafia, but his proclamations of suicide since joining the detective agency have been a lot more lighthearted when compared to his genuine desire for death in the mafia, and happen less and less often as the series goes on. Crosses over a lot with Desperately Looking for a Purpose in Life.
- Drives Like Crazy: The first light novel shows that Dazai is a terrible driver.
- Dull Eyes of Unhappiness: An interesting spin on this. There is confirmation that Dull Eyes of Unhappiness indicate a villain. Dazai is a good guy, but his eyes tend to cloud over now and then. For example, when he is pointing out Mori's Klingon Promotion, his eyes are magnificently dead◊. Notably, when he was in the mafia, his eyes were almost permanently like that, except when talking to Odasaku.
- Fights Like a Normal: Dazai himself doesn't fight much, preferring to stay on the backlines providing tactical support, but his ability inflicts this on enemies who rely on their combat-enhancing abilities.
- The Gadfly: He likes providing "useful tips" for Kunikida only to say that he's messing with him. He also likes needling his former partner, Chuuya.
- Good Costume Switch: Trades in his black suit and coat for a beige trench coat and khaki slacks when he quits the Mafia.
- Good Is Not Nice: He's generally upbeat and personable and dedicated to helping people, but has warped views on ethics and morality and tends to take a pragmatic approach to the cases he works on.
- Guile Hero: His areas of expertise are strategy and reading people, and he used to specialize in interrogation when he was in the Mafia. As a result, blackmail and manipulation are some of his favorite tactics.
- HeelFace Turn: Formally was an Executive of the Port Mafia, now a member of the Armed Detective Agency. He quit the Mafia after Oda's death and began trying to improve himself out of a desire to honor Oda's memory and final wishes.
- Hidden Depths: Dazai generally presents himself a lazy and carefree man who prefers to push his paperwork off on others, but he's extremely knowledgeable about Yokohama's criminal underworld, exhibits Chessmaster tendencies, and can be surprisingly poignant at times.
- Historical In-Joke: More than any character, Dazai has a habit of attracting these:
- His Death Seeker habits are an obvious reference to RL!Dazai's multiple suicide attempts. Dazai is even introduced attempting to drown himself (the way RL!Dazai successfully did himself in) and his wish to die with a beautiful woman is a nod to attempting suicide twice with a lover (one of which being the successful attempt).
- Dazai is implied to have been brought into the Port Mafia from a young age and left because of personal reasons. In real-life, Dazai was the son of a rich family, and was ultimately disowned due to his political leanings.
- Dazai mentions at one point to having done a rather disturbing self-portrait, which is a Shout-Out to No Longer Human, where the narrator (a blatant Author Avatar) does the exact same thing.
- His relationship with Ango and Odasaku is a nod to the Buraiha, a group of authors dissatisfied with the then-current Japanese government.
- Improbable Age: Dazai was considered for the position of Port Mafia executive before he was 16.
- Jerkass: Maybe. As Akutagawa's mentor, he beat the younger man frequently. He doesn't hesitate to taunt Akutagawa with the fact that he (Dazai) has never seen him as strong, knowing how sensitive Akutagawa is to that particular topic. It could be a case of Tough Love instead, though.
- Let's Get Dangerous!: He's eccentric, lazy, and is depicted in a Super-Deformed art style in the anime more often than any other major character, but he's also highly competent at his job when the situation calls for it or things get serious, and stops teasing Kunikida whenever the two are at an important point in a case.
- Logical Weakness: No Longer Human requires Dazai to make physical contact, so it's ineffective against abilities that don't have a physical form if he can't get close enough to touch the user. Obviously it also does nothing against opponents who don't have an Ability. Lastly, it's always active as long as there's blood flow in his brain, so Yosano's healing Ability can't effect him, except in a very small time frame in extreme circumstances.
- Manipulative Bastard: He's not above manipulating his own coworkers if it means accomplishing his goal.
- Mysterious Past: He's introduced as being a man with an unknown past who's quickly revealed as a former Port Mafia member. While the second light novel gave a number of details, much of his life prior to meeting Oda is still shrouded in mystery.
- Obfuscating Stupidity: He may not seem like the brightest bulb at first, but he's one of the smartest members in the agency. For example, despite not being a deductive genius like Ranpo, he manages to figure out a good chunk of the murder mystery in episode 5 on his own.
- Odd Friendship: Is Vitriolic Best Buds with Kunikida, the stern, idealistic Control Freak.
- O.O.C. Is Serious Business: Drops his perpetual smile when Higuchi tells him that Mori's released Q from his confinement.
- Perpetual Smiler: He's generally seen with a smile on his face, in stark contrast to his partner Kunikida.
- Power Nullifier: No Longer Human allows him to nullify other people's powers.
- Pragmatic Hero: He tends to take a very "means to an end" approach to his job and is the Agency member most willing to get their hands dirty if it means solving a case or getting crucial information.
- Suicide as Comedy: How his constant talk about suicide is played. It's especially morbid given he's named after an author who drowned himself.
- Sociopathic Hero: An Above Good and Evil Manipulative Bastard ex-mafia Anti-Hero with the closest thing to a moral compass being a friends dying request.
- Stepford Smiler: Is one. Behind his laziness, benevolent smile and optimism, is someone who is still very damaged by what happened in his younger years. He is on bad terms with Mori, who he holds responsible for it, and his appearance is the foremost happenstance when his smile turns into a Slasher Smile. This behavior matches the protagonist of No Longer Human to the letter.
- Torture Technician: His specialty in his Mafia days was interrogation and he bragged to Kouyou before questioning her about the Mafia's interest in the Guild that there wasn't anyone he couldn't get to spill everything.
- Tough Love: Maybe? While his treatment of Akutagawa is pretty horrible, it may have been Dazai's way of toughening him up to become a respected member of the Port Mafia, and to better himself.
- Vitriolic Best Buds: With Kunikida. Most of their interactions involve Dazai messing with Kunikida, and Kunikida throttling him. They still manage to work well together despite this.
- Weak, but Skilled: Described more or less as such by Chuuya. He's a piss-poor martial artist for an ex-mafia, but he's good at strategizing and his ability makes him indispensable in fights.
- We Used to Be Friends: Has this kind of relationship with Ango over Ango's role in the Mimic incident, and is hinted to have this kind of relationship with his former partner Chuya.
- What, Exactly, Is His Job?: Before everyone figured out he used to work for the Mafia, it was a game among the Agency members to try to figure out what Dazai's old job was.
- Young and in Charge: He was the youngest Port Mafia executive in mafia history.
- Literary references: He is named after Japanese author and poet Tetsuo Kunikida, who wrote under the pen name Doppo Kunikida, and his ability is a reference to Doppo's Poetry, a compilation of some of Kunikida's poems.
Height: 189 cm
Blood Type: A
Birthday: August 30
Zodiac Sign: Virgo
First appearance: Chapter 1/Episode 1
Dazai's partner. A straight-laced man who manages most of the Agency's operations. His ability, "Doppo's Poetry"note , enables him to create anything he writes down in his notebook, as long as he understands the object's form and function and it's smaller than the notebook.
- Big Good: He's the in-charge manager of the Agency. Fyodor's (and the Hunting Dogs') strategy is basically to render him immobile by provoking him psychologically so they don't have to fight him, as fighting against someone who manages the daily business of the local Badass Crew is just asking for the entire city to hunt them down.Ranpo: Kunikida, youre the strongest and most virtuous of us in the Agency. Thats why the enemy tried to break you first.
- Control Freak: Kunikida does not like it when his carefully laid out plans are disrupted, especially by Dazai.
- Crazy-Prepared: His ability is effectively a weaponized superpower version of this.
- He also gets around his ability's main Logical Weakness by carrying around slips of paper with the names of objects he frequently creates already written down.
- Curtains Match the Window: He has blond hair and yellow eyes.
- Early Installment Weirdness: Early into the series, he states he was a math teacher before becoming part of the Agency. This was retconned later to a part-time job as an algebra lecturer when it was insinuated that he was one of the early members of The Agency and most likely joined as a teenager.
- Expressive Hair: In the anime, his ponytail becomes a jagged zig-zag when he's particularly angry.
- Fights Like a Normal: His ability isn't combat-oriented and he uses it to create conventional weapons, like pistols and stun guns, to supplement his martial arts skills.
- Heroic BSoD:
- For comedic effect when he finds out Dazai used to work for the Mafia.
- Played for drama when Kunikida is forced to kill a child in order to save a crowded passenger train. Fyodor takes advantage of this later and invokes another BSOD on Kunikida by influencing a child to kill himself in front of Kunikida's eyes.
- Hot-Blooded: Kunikida has a very bad temper and is always shouting at the top of his lungs. Especially when he is angry with Dazai's suicidal antics.
- Improbable Age: Stated early on to have been a math teacher prior to becoming a detective, later retconned into a part-time side job as an algebra lecturer after it was implied he joined the Agency in his mid-late teens, which is still a bit unlikely for a 22-year-old.
- Jerk with a Heart of Gold: Kunikida is, at best, gruff and stern to his fellow detectives and Atsushi. He's not very tolerant of disruptions to his plans and doesn't like those who would disturb his carefully laid schedules (AKA Dazai). That said, he is actually a very idealistic man that strives to live up to his own expectations. He will do anything he can to complete a mission and protect his colleagues.
- Knight In Sour Armor: Although rather grumpy and cynical in disposition, Kunikida will always try to do the right thing according to his ideals.
- Logical Weakness: He can't use his power if he's separated from his notebook, he runs out of pages, or his hands are restrained.
- Megane: Wears a pair of black-framed glasses.
- My Greatest Failure: Blames himself for the death of 5 detectives in the Azure King incident. Kunikida provides Rokuzou, the hacker son of one of the detectives, with jobs and looks out for him out of guilt.
- Not So Stoic: Despite being the first to remind his coworkers that it's often not feasible to save everyone, he's deeply uncomfortable when a mission involves casualties and is visibly shaken by the resolution of the Azure Messenger incident.
- Number Two: Of the Armed Detective Agency. He handles the day-to-day minutiae of running the Agency, with the President only making rare appearances. It is explicitly stated at one point that the next director of the Agency will be Kunikida because he has all the qualities to do so. He's named acting president by the rest of the Agency when Fukuzawa is put into an ability-induced coma.
- Odd Friendship: Is Vitriolic Best Buds with Dazai, the cheerful former Mafia executive.
- Only Sane Man: At times. He is mostly intolerable to the other characters quirks, such as Dazai's constant suicide attempts.
- Perpetual Frowner: In contrast to Dazai, Kunikida is usually seen frowning.
- Pragmatic Hero: As the most logical member of the Agency, Kunikida is usually the one to consider what's most practical for any given situation. As such, his assessments can be rather cold-hearted at times. For example, he tells Atsushi to hand Kyoka over to the police, stating that her status as a wanted murderer would sully the Agency's reputation. When Atsushi protests, Kunikida asks Atsushi if he has the resources to protect Kyoka, suggesting that Atsushi should be more worried about himself.
- Reality-Writing Book: Thanks to his ability, his notebook is a minor type 3 example. His ability, Doppo's Poetry, allows him to create objects by writing them down in his notebook, as long as the object he's trying to create is smaller than the notebook.
- Sadistic Choice: Fyodor manipulates events to put him in a situation where he has to choose between saving an innocent child with bombs strapped around her neck or a train full of passengers.
- Stoic Spectacles: Kunikida is professional and likes to organize and schedule every little detail to the point that it becomes a Running Gag. He also has the long hair and the ponytail.
- Team Dad: Usually fills this role for the Agency. He is extremely loyal to his friends.
- The Leader: While he is not officially the leader of the Agency, when trouble occurs making Fukuzawa unable to be leader, he is often the appointed leader, due to his intelligence and sensibility.
- Vitriolic Best Buds: With Dazai. Most of their interactions involve Dazai messing with Kunikida and Kunikida throttling him. They still manage to work well together despite this.
- Western Zodiac: A Virgo, and a textbook example of one.
- Writers Cannot Do Math: A victim of this. He somehow found time to go to university, study to become a maths teacher, work as one for a while, and then work for two different law enforcement agencies. He's only 22 years old.
- Younger Than He Looks: Despite what his appearance and behavior imply, he's actually 22, making him a good four years younger than Ranpo and Yosano.
- Literary references: He is named after Japanese mystery author Tarou Hirai, who wrote under the pen name Ranpo Edogawa.
Height: 168 cm
Blood Type: O
Birthday: October 21
Zodiac Sign: Libra/Scorpio cusp
First appearance: Chapter 1/Episode 1
An intelligent and highly praised member of the Agency. He's well-known for his amazing deduction abilities, which he often uses to help the police solve crimes. Convinced that he has an ability that he calls "Ultra Deduction," but he really doesn't.
- Ambiguous Disorder: A lot of Ranpo's behaviour tends to imply something like autism or Asperger's syndrome. At times he has no common sense and he's not very good with everyday tasks that he views as being below his intellect, but he is amazing and incredibly intelligent in what he does.
- Badass Normal: Unlike the rest of the Agency he doesn't actually have an ability and thus gets by with his amazing skills of deduction and observation.
- Brilliant, but Lazy: When not on a case, he's usually seen lounging around the office eating something sweet. When Atsushi is taken by Akutagawa, the Agency president needs to bribe Ranpo in order to get him to figure out where Atsushi had been taken.
- Cerebus Retcon: His delusion over having an Ability is revealed in the third novel to have a much darker backstory behind it. Twelve years before the series began, Ranpo was an orphaned Teen Genius who Fukuzawa met when he solved the murder of Fukuzawa's client. Ranpo's deduction abilities however caused him to become severely disconnected, isolated from humanity and he was on the verge of a mental breakdown. "Super Deduction" was a lie Fukuzawa created to enable Ranpo to continue.
- Eyes Always Shut: Unless he's surprised or using his 'ability'.
- First-Name Basis: Usually referred to by his given name.
- Foreshadowing: His 'Ability' is the only one note that's not named after a work of the author he's called after. When there came a sort of Defictionalisation, and Kadokawa put the likeness of the BSD characters on the books of the real authors, Murder On D Hill (Ｄ坂の殺人事件, D-zaka no Satsujin Jiken) was chosen for Ranpo, after chapter/episode 6.
- Genius Sweet Tooth: The smartest character in the show and in all of his appearances in the anime so far, he has been seen eating or drinking something sweet.
- Great Detective: He is known as one of the best detectives there are and he's proud of it.
- Historical In-Joke: His relationship with Poe in the series is basically the reverse of their namesakes- the real Ranpo Edogawa greatly admired the real Edgar Allan Poe, to the point of basing his pen name off of Poe's name ("Edogawa Ranpo" is derived from the Japanese pronunciation of "Edgar Allan Poe").
- Idiot Savant: He's a brilliant detective capable of solving crimes in an instant, but can't figure out how to use the train for some reason.
- Insufferable Genius: He's not exactly humble about his talents.
- It Was a Gift: His glasses were a gift from Fukuzawa.
- It's All About Me: Frequently prone to wondering aloud why no one is focusing on him. Doubles as Attention Whore.
- Nice Hat: He dons a deerstalker hat to give him a classical detective look.
- Nominal Hero: He'll pretty much only do work if he's bored out of his mind or Fukuzawa bribes him with praise, and he doesn't really care one way or the other how things go as long as he and Fukuzawa are safe.
- Non-Action Guy: Is never seen fighting, probably because he can't.
- No Sense of Direction: Needs a guide to get home after solving a case. He also can't figure out how to use the train.
- O.O.C. Is Serious Business: Loses his normal cheerful arrogant attitude once the need to find the culprit who by Fyodor's command puts Fukuzawa and Mori in a coma that will result in their deaths within 48 hours if either of the other party isn't killed, which is noted by Atsushi.
- Protagonist-Centered Morality: Exemplified by his motto, "all's well that's well for me!"
- Sherlock Scan: His "ability." He can quickly scan a crime scene and deduce exactly what happened in a matter of seconds. He can also quickly piece together the solution to nearly any problem, puzzle, or mystery, as long as he has some kind of lead.
- The Smart Guy: The smartest member of the Agency and the only one who can do real detective job in the matter of seconds.
- Smart People Wear Glasses: He puts on a pair of glasses when he uses "Ultra Deduction". He believes this is what activates his "ability".
- Spell My Name with an "S": Sometimes his first name is romanized as "Rampo".
- Super Intelligence: Of the exceptional perception and advanced reasoning varieties.
- The Team Normal: The only member of the Agency to be a normal human with no ability. His "Ultra Deduction" still makes him one of the most valuable additions to the team.
- "Well Done, Son!" Guy: Receiving Fukuzawa's praise is one of the few things that motivate Ranpo to work.
- Literary references: She is named after Japanese poet Akiko Yosano, and her ability is a reference to Yosano's poem "Thou Shalt Not Die."
Height: 166 cm
Blood Type: O
Birthday: December 7
Zodiac Sign: Sagittarius
First appearance: Chapter 1/Episode 1
The Agency's medic. Her ability, "Thou Shalt Not Die," allows her to heal anyone who has received a life-threatening injury.
- Action Girl: The most qualified for this title out of the Detective Agency's women.
- Bag of Holding: Her doctor's bag shouldn't be able to hold half of the weaponry she stuffs into there, which include a hatchet blade as long as her arm!
- Berserk Button: Do not treat death lightly. As a doctor, she's seen many people die because she was unable to save them. People that treat death like a game, like Motojiro Kajii, inspire her wrath.
- Chainsaw Good: Her preferred method of harming her injured coworkers to the point where she can heal them with her ability is to shackle them to her examination table and then introduce their torso to a chainsaw.
- On the other hand, in a notable example of writers doing their homework, Yosano doesn't try to fight with one. (but does use it to intimidate people, which proves to be pretty effective)
- Combat Medic: She may be a doctor, but she's no stranger to violence. She kicks Motojiro Kajii's ass after fooling him into thinking that she was dead.
- Deadly Doctor: She doesn't kill people with her medical expertise, but the nature of her ability frequently requires her to injure her patients. To that end, she carries around a doctor's bag filled with weapons.
- The Dreaded: Hilariously enough, to her own colleagues. She's a valued member of the Agency, but her colleagues dread being injured because it means that they'll have to be treated by her. Treated far more tragically as part of her Dark and Troubled Past, where she was sent to the battlefield to constantly heal soldiers' injuries so they can be sent out into the field. While she could heal their physical wounds, the mental scars from the grievous wounds they suffered remained, sending them all into delirium from being sent into battle and nearly dying over and over. Several of them committed suicide to escape her and they branded her the "Angel of Death".
- Fights Like a Normal: Her ability gives her the freedom to fight recklessly and try more aggressive tactics, but it doesn't enhance her combat skills beyond that. Any fighting she does is purely her own skill. Noticeably, she can swing her hatchet hard enough to smash the ground during her fight with Kenji against Chuuya.
- Hair Decorations: Has a golden butterfly hairclip.
- Healing Hands: She can heal herself and others, but only if on the verge of death. If her patients are only slightly injured, then she needs to hurt them more until they're half-dead.
- Healing Shiv: Her "treatments" usually consist of hacking away at her patients until they're on the verge of death before using her ability to heal them.
- Improbable Weapon User: In the opening animation of the anime's first season, she is shown wielding scalpels◊...which she doesn't even wield like that in the anime or in the manga. But who does use scalpels that way? Mori◊.
- Labcoat of Science and Medicine: Not part of her usual outfit, but she does don a labcoat in the story Poe writes.
- Meganekko: Again, she doesn't wear them usually, but she wears glasses in Poe's story. Ranpo uses them after her in-story death to activate his Ultra-Deduction.
- Old Friend: Is hinted that she has this relationship with Mori, of all people. In real life, Yosano Akiko and Ougai Mori were in the same poetry group, and she even asked him to name her twin daughters.
- Red Baron: She was once known as the "Angel of Death" for her ability to constantly bring soldiers from the brink of death. But since she couldn't erase the memories of the wounds they suffered, all of her patients went insane from being sent into battle over and over after suffering any number of horrible wounds.
- Sadist: Played for laughs. Yosano seems to enjoy inflicting additional injuries to her patients.
- She Cleans Up Nicely: Here.
- Thou Shalt Not Kill: While she has no problems with grievously maiming her opponents (and allies) due to the nature of her ability, she refuses to let anyone die on her watch.Yosano: No matter how hard we doctors try, our patients still slip through our fingers. Death, the ultimate form of science? What a load of crap! I'll kill anyone who doesn't value life!
- Tragic Keepsake: Her butterfly hairclip. A soldier gave it to her.
- '20s Bob Haircut: Even though this series isn't set in the '20's, she has the aesthetic, including the haircut.
- Voiced by: Hiroyuki Kagura (Japanese), Lucien Dodge (English)
- Literary references: He is named after Japanese poet and children's author Kenji Miyazawa, and his ability is a reference to Miyazawa's poem "Undefeated by the Rain."
Height: 158 cm
Blood Type: O
Birthday: August 27
Zodiac Sign: Virgo
First appearance: Chapter 1/Episode 1
A cheerful and easygoing boy from the countryside. His ability, "Undefeated by the Rain," gives him super-strength when he's hungry.
- Animal Motifs: He's often associated with a cow, because his favorite animal is a cow, he's strong but has yet to show if he's smart, stubborn and capable of great violence but is actually soft-hearted.
- Badass Adorable: He'll pick up cars and chuck them at you while wearing a cute, innocent smile the entire time. In chapter 38, he rips a steel door out of the wall with a :D expression.
- Care-Bear Stare: More or less how he solves his cases.
- Country Mouse: Hails from the countryside, which can make him rather naive to several urban concepts. He doesn't really understand things like money and usually relies on his country instincts.
- Does Not Like Shoes: Usually goes around barefoot, although he does wear sandals at times.
- The Dreaded: Justifiably so, the terror he brings when his Ability is active is a sight to behold.
- Friend to All Living Things: Easily befriends others, whether they be human or animal.
- First-Name Basis: Since he's only fourteen, everyone in the Agency calls him by his first name.
- Hair of Gold, Heart of Gold: Has blond hair and is a very optimistic and friendly boy.
- Moe Stare: One of the reasons why people are so willing to cooperate with him.
- Nice Guy: Amazingly so.
- Out of Focus: More often than not he's a background character and, compared to the other Agents, gets into few fights.
- Overalls and Gingham: Comes from the country and wears a pair of overalls. He even has the straw hat!
- Perpetual Smiler: Almost always smiling.
- Pint Sized Power House: Is the shortest and youngest male in the agency and also the strongest.
- Super Strength: His Ability grants him superhuman strength, but only when he's hungry.
- Trademark Favorite Food: Not as noteworthy as other characters', but he likes beef bowls. Cows are also his favorite animal. Atsushi points out the irony in this.
- Unskilled, but Strong: There's no real technique to Kenji's fighting, but his Super Strength makes up for it.
- Youthful Freckles: Hard to see or not drawn in at times, but they're there.
- Literary references: He is named after Japanese author Junichiro Tanizaki, and his ability is a reference to Tanizaki's novel Light Snow, alternatively titled The Makioka Sisters.
Height: 179 cm
Blood Type: A
Birthday: July 24
Zodiac Sign: Leo
First appearance: Chapter 2/Episode 2
A member of the Armed Detective Agency around Atsushi's age. Often seen in the company of his little sister, Naomi. His ability, "Light Snow," projects realistic illusions within a small area that can move and even inflict pain on others.
- Adorkable: He is a shy, awkward character.
- Beware the Nice Ones: One of the nicest members of the Agency, second only to Kenji. Also the most terrifyingly savage when his Relative Button is pushed. Take◊ a look◊, if you dare...
- Big Brother Instinct: He gets pissed when Naomi is hurt.
- Empty Eyes: When his Relative Button is pushed, or he otherwise gets serious, like when he's trying to assassinate the Port Mafia's boss.
- Fiery Redhead: Averted... Until you hit his Relative Button...
- Hand-Hiding Sleeves: Sometimes does this with his sweater in the manga.
- Hair Decorations: Clips his left bangs back with a pair of white clips.
- Hidden Depths: In chapter 48, Tanizaki manages to throw off a group of trained killers with his Killing Intent after they threatened to kill his sister, break out of his confines, and almost manages to kill the boss of the Port Mafia.
- In the Hood: He usually keeps his hoodie tied around his waist, but he'll wear it properly when he needs to get serious or sneak around.
- Killing Intent: In addition to the incident mentioned above, after Kouyou foils his attempt at killing Mori, Kouyou comments that while she may not be able to see Tanizaki, she is able to feel his bloodlust.
- Kind Hearted Cat Lover: Cats are listed among his likes.
- Knight Templar Big Brother: He states that things such as morality, ego, and pride do not matter to him compared to Naomi. To keep his little sister safe, Junichiro would let the entire world burn down in flames.
- Master of Illusion: His power, Light Snow, allows him to project illusions. Said illusions are incredibly lifelike, to the point that Mori (someone who had seen it earlier) could not see that the Fukuzawa he was fighting with in chapter 31 was fake.
- Nice Guy: In general, Junichirou is a humble and amiable guy that gets along well with others. He's quick to apologize to Atsushi for the bomb incident in episode 2.
- Non-Action Guy: Light Snow is a useful ability, but ill-suited for fast-paced combat, and he has no martial arts training. Most of his work in the Agency involves gathering information, scouting locations, and tailing suspects.
- Subverted in chapter 48. Tanizaki is shown to be able to wield a switchblade effectively, and, coupled with his ability, uses it to escape from a roomful of trained killers. Hirotsu even comments that Tanizaki's ability is suited for assassinations.
- Noodle Incident: When Atsushi asks him about his own entrance exam, Junichiro makes a horrified expression before responding that he doesn't (want to) remember.
- The Nondescript: He stands out the least out of the Agency members. This coupled with his ability makes him good at reconnaissance.
- Relative Button: Hurt Naomi, and you are dead to him.
- Screw the Rules, I'm Doing What's Right!: More of, Screw Morals, I'm Saving My Sister.
- The Sneaky Guy: His ability is well-suited for this role, so he often is assigned on reconnaissance.
- Literary references: She is named after Japanese author Kyotaro Izumi, who wrote under the pen name Kyoka Izumi, and her ability is a reference to Izumi's play Demon Pond.
Height: 148 cm
Blood Type: B
Birthday: November 4
Zodiac Sign: Scorpio
First appearance: Chapter 7/Episode 4 (cameo), Episode 8 (actual)
An orphan who used to work for the Port Mafia. She was taken in by the Agency and became an official member after being saved by Atsushi. Her ability, "Demon Snow," summons a phantom swordswoman to attack. Unlike the others, her Ability could only be controlled by orders given over a phone, initially by Akutagawa.
- Action Girl: Even when Powers Do the Fighting.
- Animal Motifs: Rabbits. She has a rabbit charm on her phone, has a rabbit stuffed animal she uses as a comfort object, and wears her hair in long pigtails somewhat resembling floppy rabbit ears. It's a reference to the real Kyoka Izumi, who was born in the Year of the Rooster (the opposite sign of the Rabbit), but collected everything related to rabbits as a hobby.
- Big Eater: Able to eat an astounding amount of boiled tofu, much to the detriment of Atsushi's wallet. She's able to eat a crepe right afterwards, stating that she has a second stomach for that kind of food.
- Blessed with Suck: Her ability is very powerful, allowing her to rapidly fill her opponents full of holes. However, it only activates when receiving orders over her phone, and she can't control it unless she manages to grab somebody else's phone and use it to call herself. Fukuzawa fixes this problem and allows her to use it normally after she becomes an official member of the Agency.
- Cry Cute: Her emotionless facade breaks down and she sheds tears as she claims to Atsushi that she doesn't want to kill anymore and attempts suicide.
- Dull Eyes of Unhappiness: Has these when taking orders from Akutagawa. Loses them after Atsushi rescues her.
- Emotionless Girl: Subverted. When she's first introduced, Kyoka's personality is similar to that of a doll. She lacks all emotions and appears ruthless when she is ordered to perform a duty. This is soon revealed to be a facade she puts up after being forced to kill by the Port Mafia. After being exposed to Atsushi and the real world, Izumi reverts back to a normal girl.
- Exact Words: Kouyou said Demon Snow killed Kyoka's parents. However, she didn't say Demon Snow was in Kyoka's possession at the time.
- First-Name Basis: She's fourteen, so most of the other characters call her by her first name.
- Flower in Her Hair: The hair ties securing her pigtails are decorated with flowers.
- Forced into Evil: Kyoka has killed 35 people since being taken in by the Port Mafia. She really doesn't want to kill people, but can't control her powers and has nowhere to run.
- Gender-Blender Name: She's named after a male author.
- Girlish Pigtails: She has her hair tied into two low twintails.
- Girls Love Stuffed Animals: Successfully retrieves a stuffed rabbit from a crane game machine. She's seen hugging it tightly afterwards. Too bad it gets covered in blood after Akutagawa attacks her and Atsushi.
- Guardian Entity: Inverted. Her ability, Demon Snow, killed her parents. Actually played straight. Her parents were affected by someone's body-controlling ability. Kyouka's mother, who possessed the Demon Snow ability at the time, ordered Demon Snow to kill her and her husband so they wouldn't hurt Kyouka. Afterwards, Demon Snow became Kyouka's ability.
- Hair Decorations: Wears a white hairband. Her pigtails are decorated with white flowers.
- HeelFace Turn: She used to work for the mafia, but after she is saved by Atsushi, she joins the Agency and eventually gets the courage to betray the mafia and be with the Agency. Downplayed in that she was never evil at heart anyway.
- Idiot Hair: A long piece of hair.
- Innocent Cohabitation: She starts living in Atsushi's apartment after he saves her and she joins the Agency.
- Interrupted Suicide: After she admits that she's tired of being forced to kill for the Port Mafia, she jumps out of the train with an armed bomb vest. If Atsushi hadn't ripped the vest off, she would have died.
- In the Blood: Both of her parents were assassins.
- Killing Intent: Inverted. When she tries to kill Kouyou, Kouyou comments that she had been almost unable to sense her killing intent.
- Kimono Is Traditional: Wears a red kimono, unlike most of the other characters, who wear clothes straight out of the 20's.
- Little Miss Badass: Killed 35 people prior to joining the Agency. Continues to use her experience with assassination in order to help the Agency.
- Morality Pet: To Kouyou Ozaki, who cares deeply about Kyoka despite her betraying Port Mafia. Kouyou was the one to secretly give her the file that contained the truth of her parents' death, as well as, in chapter 48, preventing her men from shooting at Tanizaki, for fear that they'd accidentally hit Kyouka.
- Power Incontinence: Can't easily control her ability until Fukuzawa suppresses it to a manageable level.
- Powers Do the Fighting: Mostly relies on Demon Snow when she gets into fights.
- Rapunzel Hair: Her twintails go all the way down to her waist.
- Self-Made Orphan: Kouyou reveals that Demon Snow killed her parents. Subverted in Chapter 43, when it's revealed that it was actually suicide and Demon Snow didn't belong to Kyouka until after her parents' deaths.
- The Stoic: She's usually very calm and unemotional. However, she has plenty of Not So Stoic moments.
- Sugar-and-Ice Personality: She initially appears cold, emotionless and ruthless. After she starts opening up to Atsushi, Kyoka is revealed to be a curious, playful and very cute girl.
- Trademark Favorite Food: Tofu, according to her self-introduction. More specifically, boiled tofu. She's also fond of crepes, stating that she has a second stomach for dessert.
- Two First Names: Her last name is commonly used as a first name in Japanese.
- Tyke-Bomb: She was raised as an assassin by Port Mafia. Kyoka hated killing people, but she would be killed if she didn't and she had nowhere else to go.
- Literary references: She is named after the title character and antagonist of Junichiro Tanizaki's novel A Fool's Love, alternatively titled Naomi, said to be modelled after Tanizaki's actual sister-in-law.
Blood Type: Unknown
Birthday: March 26
Zodiac Sign: Aries
First appearance: Chapter 2/Episode 2
Junichirou's sister, who works part-time as an office assistant at the Agency. She doesn't have an ability.
- Beauty Mark: She has one under her left eye.
- Big Brother Attraction: She has a huge crush on her brother.
- Double Standard: Rape, Female on Male: Her constant sexual harassment of her non-consenting brother is treated as humorous.
- First-Name Basis: The other characters call her by her first name, likely to distinguish her from her brother.
- Foil: To Kirako Haruno. They're both clerks and have no Ability, but there's a great difference in their characters. While Naomi is spoiled, manipulative and willful, Kirako is refined and ladylike. This is because the real Tanizaki wrote them as such too.
- Hidden Depths: In the manga, she was shown to display a surprising amount of insight and cunningness when she and Haruno evacuated the safehouse, opting to escape with a car from the staff parking instead of the regular parking lot, where Steinbeck and Lovecraft were lying in wait. Haruno comments that were Naomi an ability user, she'd make a capable agent.
- She notices the correlation between Mii-chan's disappearances and incidents in Yokohama before Souseki's existence is revealed.
- Little Sister Heroine: Strongly averted. While Junichirou does strongly love his sister, it is only in the normal sibling sense, and he very much dislikes the way she acts towards him.
- Seifuku: Naomi's school uniform, which she wears while working part-time in the Armed Detective Agency.
- Shout-Out: She's named after the title character and antagonist of a novel written by the author that her brother is named after.
- Taking the Bullet: She shields her brother from Higuchi's gunfire, leaving her severely injured.
- Zettai Ryouiki: Grade C.
- Voiced by: Mina (Japanese), Abby Trott (English)
- Literary references: She is named after a major character in Junichiro Tanizaki's novel A Fool's Love, alternatively titled Naomi.
Blood Type: Unknown
Zodiac Sign: Unknown, because of an unknown birthday
First appearance: Chapter 22/Episode 18 (proper)
One of the Agency's clerks, usually seen assisting Fukuzawa with paperwork. She doesn't have an ability.
- The Alcoholic: Possibly. Naomi comments that she once drank five bottles of wine in a single night.
- Badass Normal: Manages to keep her cool even while being pursued by Lovecraft and Steinbeck.
- Ditzy Secretary: She's calm, collected, and competent on the job and when in danger, but when she's not working she's lazy and obsessed with her cat.
- Early-Bird Cameo: She first appears in the second episode of the anime, much earlier than her manga introduction in chapter 22, and appears again in the episodes adapted from the first light novel (6 and 7).
- Kindhearted Cat Lover: She has a pet cat named Mii-chan.
- Meganekko: Wears a pair of red-framed glasses.
- Office Lady: Her job.
- Shout-Out: Like the Agency's other ability-less office worker Naomi, she's also named after a character from Junichiro Tanizaki's novel "A Fool's Love."
- Voiced by: Kenichi SuzumuraLiterary references: He is named after Japanese author Katai Tayama, and his ability is a reference to Tayama's novel Futon, alternatively titled The Quilt.
Height: 175 cm
Blood Type: B
Birthday: January 22
Zodiac Sign: Aquarius
First appearance: Chapter 41
An informant for, and former member of, the Armed Detective Agency. His ability, "Futon," lets him control all electronics in view so long as he's relaxed.
- Cannot Talk to Women: Has to look down the road when talking to Higuchi.
- I Call It "Vera": Downplayed with his futon called "Yoshiko".
- The Informant: To the Agency.
- Lazy Bum: It appears that his power only works when he is relaxed. As such, he can only activate his Ability when wrapped in his futon.
- Old Friend: Of Kunikida.
- Technopath: 'Futon' allows him to control any electronics within view.