Notes for characters in this page:1) They're by definition One Scene Wonders.2) Since these characters are likely to be key characters in a certain case, Spoilers Ahead.
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Introduced in the Introduction Arc
Dr. Narumi Asai
Voiced by Ai Orikasa (JP)Appeared in the Moonlight Sonata arc. She is the beautiful doctor of the fishing island of Tsukukage, and kind of a Na´ve Newcomer to the island itself. She is actually Seiji Asou, the son of the late local pianist who died under strange circumstances, and has returned under a disguise to find out who did his family in.Mandatory Naming Note: His surname by birth, Asou is also that of one of Aoyama's assistants.
- Alternate Character Reading: He didn't need to change the kanji of his name to change names. More info in the original page.
- Anti-Villain: One of numerous examples in the series. He went on a murder spree against the men responsible for killing his family when he was a child. He also used the last of his strength to save Conan.
- Broken Bird: Rare Crossdresser Example.
- Driven to Suicide: Yep.
- Dude Looks Like a Lady: Narumi is actually a man who disguised as woman.
- Face Death with Dignity: He just let stayed inside the burning house, calmly playing his dad's piano until either he burned to death or fatally asphyxiated "thanks" to the fumes and smoke.
- Harmless Lady Disguise: Although he showed no signs of being a male all the time.
- Hospital Hottie: Is quite attractive doctor.
- Ill Boy: Which, ironically, saved his life: he was in an hospital when the Asous were killed.
- Love Makes You Evil: His whole family was murdered, after his pianist father refused to keep aiding a local drug ring and they got to him. Seiji only survived because he was hospitalized in Tokyo, and he planned revenge...
- Small Role, Big Impact: Asai was only in one case, but the strong impact it had on Conan/Shinichi cannot be understated. This case haunts Shinichi as the first time he was faced with a suicidal culprit whom he was unable to save.
- Sympathetic Murderer: He only wanted to avenge his murdered family, and when Conan tried to save him he immediately tossed him through the window so he wouldn't burn or asphixiate to death with him.
- Walking Spoiler: Her true gender and her influence on Shinichi/Conan earns her this trope.
Voiced by Maya Okamoto (JP)Shinichi and Ran's former music teacher, as well as the much-loved daughter of Kiyonaga Matsumoto. Who is poisoned to almost death in her wedding day...
- Beautiful All Along: Conan only knew Sayuri as a Grumpy Bear Meganekko. Cue seeing her in a wedding dress and him being dumbstruck at how pretty she really was.
- Blood-Splattered Wedding Dress: Less blood-splattered than in other cases, but the imaginery still counts◊.
- Childhood Friend Romance: With Toshihiko — they were friends in childhood but separated at one point and end up marrying.
- Christmas Cake: Until recently. She's getting married, yeah, but at age 27 - past the 25 year old "limit". And is actually thirty when she and Toshihiko get married... for real.
- Daddy's Girl: She has a close relationship with her father. Justified since her mom has already passed away.
- Drink Order: Lemon tea. Which is poisoned. Additionally, it was her favorite drink because it reminded her to her first love... Toshihiko.
- Genki Girl: Grown-up version.
- Meganekko: In the epilogue, we see her in normal clothes and glasses. She's still very cute.
- Sins of Our Fathers: She knew Toshihiko was her Unlucky Childhood Friend, as well as the part that her dad had in his mom's death. So when Sayuri realizes he wanted to kill her as revenge, she willingly took the poison to atone. Ultimately, she survived, and three years after the incident she married the now-repentant Toshihiko.
- Woman in White: Well, she is a bride-to-be.
- Voiced by: Yukari Shin (JPN)
- Always Someone Better: Ran thinks this way about her, though she doesn't hate her one bit.
- Because You Were Nice to Me: Inverted. At first, Shinichi was just an extraordinary soccer player to her, but one day she brought some handmade lemon pie so the team could eat. Unlike the other members who pretended the lemon pie was delicious, Shinichi point-blankly said they were terrible. She then decided to bring him every lemon pie she made until he said it was truly delicious. And, at some point, she fell for him.
- Broken Ace: She is very smart, very popular, VERY beautiful... In fact, when she's introduced she has already won both a literary contest and a beauty one, beating at least three sempais of hers to the punch. But never mind her accomplishments, she has a perpetually sad air around her. Not to mention, she has yet to get over her feelings for her First Love, Shinichi.
- Cute Sports Club Manager: Of the soccer team in Shinichi, Ran and Sonoko's junior high.
- Driven to Suicide: Averted. This trope is discussed by Kogoro and the police as one of the possible causes for what happened to her, but it isn't correct.
- First Love: Subverted. Asami lied about being this to Shinichi to Ran and Sonoko because she wanted to "be a little mean" to his actual first love, Ran. It also turns out that Shinichi was her first love.
- Green-Eyed Monster: Implied. When Asami revealed she wasn't Shinichi's first love, she explained the reason for the lie was because she wanted to be a little mean to his actual first love, Ran.
- Hello, Nurse!: Was very popular at school because of her looks and talent.
- Hopeless Suitor: For Shinichi. She lampshades it very, very sadly at the end."You can't force someone to open their heart to you."
- Lethal Chef: Wasn't very good at the kitchen in her junior high and high school days, though she ultimately improved with time. The guys at the club pretended to not notice because they didn't want to hurt her feelings, and the only one who told her so was Shinichi.
- Love Confession: It's not officially shown, but she confessed her love to Shinichi back when she was still in their middle school.
- Love Hurts: She loved Shinichi, but he rejected her love declaration. Her friend and sempai Sawai loved her, but she didn't return his feelings. Then, Sawai drugged her and caused a fire to try being her Knight in Shining Armor. Ouch, poor Asami.
- One-Note Cook: Downplayed. She's known to be a great cook, her best known specialty are lemon pies.
- Sempai Kouhai: She is Ran, Sonoko, and Shinichi's senpai.
- Single Woman Seeks Good Man: Asami came to like Shinichi not only for his talent in soccer, but also for his blunt approach to things.
- Small Role, Big Impact: Makes an appearance in one case, but thanks to her, it's now known that Ran is Shinichi's first love.
- Student Council President: Of Teitan High School, until her graduation.
- Through His Stomach: During her middle school years, she made and gave as many lemon pies to Shinichi because she wanted his honest opinion if she got any better at making them. And at some point, she fell for him.
- Wounded Gazelle Gambit: Averted. This trope is discussed by Kogoro and the police as one of the possible causes for what happened to her, but it isn't correct.
Introduction in the Sherry Arc
- Voiced by: Kazuya Ichijou (JP)
- Anti-Villain: Not a bad person, but still a Serial Killer.
- Driven to Suicide: Tries to shoot himself in the head when found out. Heiji struggles with him and manages to stop him... at the cost of being shot.
- Love Makes You Evil: The love for his father drove him to kill the ones responsible for the Deadly Prank that murdered him.
- Knight Templar: Views himself as such. Heiji disagrees.
- Serial Killer: He killed four people, and was planning to kill two more and use the last one as a scapegoat.
- Strong Family Resemblance: Looks a lot like his late father. Actually a huge plot point: seeing him caused Numabuchi a Villainous B.S.O.D. that let Yusuke learn what happened to Inaba... and then seeing Inaba's picture lets Conan and Heiji identify him as the real culprit.
Introduced in the Vermouth Arc
Voiced by Nobutoshi Canna (JP)The character that drives the backstory of the 12 Million Hostages story arc. Former member of the bomb squad, he was later transferred to the criminal team because of his That One Case— and it was him who became another painful That One Case for Sato.
- Brutal Honesty: Flashbacks show that he spoke out his mind no matter what anybody would think.
- Chekhov's Gunman: In the non-serial movie The Darkest Nightmare, Tooru Amuro reveals that he learned how to defuse a bomb from Matsuda himself, and is instrumental in stopping a bomb planted by the Black Organization which, coincidentally, is placed on yet another ferris wheel.
- Dying Declaration of Love: To Sato, via text — "I kinda like you".
- Famous Last Words: "I kinda like you"— his final text to Sato. Also, if we count last thoughts: "I'm sorry, Hagiwara, I won't be able to fulfill our promise...".
- First Love: For Sato. Sort-of The Lost Lenore later.
- Good Smoking, Evil Smoking: He is a smoker, and looks damn cool while at it.
- The Lost Lenore: To Sato. He died in an Heroic Sacrifice to thwart the plans of a Mad Bomber. Sato herself is revealed to be deeply, deeply traumatised by his death, to the point of believing herself to be afflicted of a Cartwright Curse when her prospect Second Love Takagi also almost falls victim to similar deals. It's only when the Mad Bomber is properly captured (and Takagi convinces her to not kill him right there) that she can finally move on.
- Nerves of Steel: Despite his personal interest in the case which eventually claimed his life, Matsuda remained cool and professional, placing the safety of Sato (for whom he had come to care as well) and innocents over his own life — qualities which had won Sato's heart.
- Posthumous Character: He was already dead for 3 years when he was first mentioned.
- Tall, Dark, and Handsome: Matsuda was really, really hot.
- That One Case Hagiwara's death, to the same bomber; that's the reason he was transferred to Criminal Investigation, Team 1.
Introduced in the Kir Arc
Voiced by Risa Hayamizu (JP)The "Detective of the South" in the Detectives' Koshien arc. She's from Fukuoka, a big town in the southern island of Kyushu.
- Amateur Sleuth: One of the more famous High School Student Detectives. She was, but she's no longer a high schooler.
- Anti-Villain: Her murder of Tokitsu is very sympathetic since it was his erroneous deduction that got her friend arrested which led to her suicide. What also helped make her more sympathetic is how Tokitsu didn't care about the fact he sentenced an innocent person to jail, but more about his reputation.
- Bifauxnen: No wonder the guys, save for Tokitsu, simply assumed that she was a boy too until they saw her in a girly school uniform.
- Bokukko: Besides her bifauxnen appearance, another reason the guys (sans Tokitsu, who already met her before) mistook her for a guy was her use of male pronouns. Subverted as soon as she's uncovered as Tokitsu's killer, she switches to the more gender-neutral watashi, apparently feeling that she's too bloodstained to use boku anymore as it was a symbol of her youthful innocence.
- Broken Bird: She was deeply, deeply affected by the death of Kana, and planned to kill the one responsible for it.
- Fear of Thunder: Subverted, she was faking it.
- Gender-Blender Name: While "Natsuki" is mostly known as a girl's name, it's actually for both genders.
- Graceful Loser: Quietly tuned herself in after she was exposed for being the murderer and her plan failed to have all of them starve to death on the island.
- Has a Type: Apparently, Natsuki likes hot-blooded guys.
- Headphones Equal Isolation: Invoked. Natsuki wore huge earphones in the beginning, which confused the others and made them think she didn't want to speak too much to them. She actually used them to hide her pierced ears, which would let others know she wasn't a highschooler anymore (Japanese schools are very strict about dress codes and often prohibit the use of any piercings, earrings included). She later hid them with her hair when she couldn't use the 'phones anymore.
- Older Than They Look: Is already 20 but looks young for her age. She exploits it to try fitting in the group better and not raise any eyebrows.
- Red Baron: "Detective of the South".
- Sailor Fuku: Hers is light blue, with white scarf/collar and black socks. It's also depicted realistically, with a long skirt below the knee.
- Sympathetic Murderer: Killed fellow Amateur Sleuth Tokitsu, as he insisted that the dead socialite was killed (He had been fooled by a "closed room trick" performed by a thief after the murder, believing it to have been performed by the murderer.) This led to the suicide of the only suspect, Natsuki's friend Kana.
- Unsettling Gender Reveal: Hakuba, Heiji and Conan didn't know that the very tomboyish Natsuki was a girl, and they only found out when they saw her in a seifuku uniform.Heiji: T-that guy's a girl?!
- Worthy Opponent: Expresses admiration for the boys after her arrest, and wished she could've done a real koshien with them.
Voiced by Shinichiro Miki (JP)The "Detective of the North" in the Detectives' Koshien arc. He's born in Tokyo and raised in Hokkaido, a huge island in northern Japan.
- Amateur Sleuth: One of the more famous High Schooler Detectives.
- Asshole Victim: While he didn't intentionally drive Natsuki's friend Kana Mizoguchi to kill herself, he showed no remorse about it and was more worried about his reputation. No wonder Natsuki got pissed and killed him.
- Blinding Bangs: Had these in the anime flashbacks.
- But for Me, It Was Tuesday: What he thought of the case in the manor. Too bad he said that in front of the suicidal suspect's best friend. Enjoy being bludgeoned to death, buddy.
- Driven to Suicide: Not him, but 50 culprits in the 300 cases he's resolved. One of them just so happened to be Natsuki's close friend.
- Eerie Pale-Skinned Brunette: In the anime flashbacks.
- Japanese Pronouns: Uses the very archaic shousei to refer to himself. The other junior detectives tend to use ore or boku instead. (Natsuki included.) That's why Kana referred to him as having "a weird accent", letting Natsuki pinpoint him and the other detectives as the possible culprits behind Kana's suicide.
- Red Baron: "Detective of the North".
- Smug Snake: He constantly tried to make himself look humble despite his lack of humility, and it made him look rather unlikeable instead.
- Tall, Dark, and Snarky: The tallest of the high school Detective, with long dark hair and quite the snarky behavior.
Introduced in the Bourbon Arc
Voiced by Keiji Fujiwara (JP)An old friend of Wataru Takagi, and his deceased Big Brother Mentor. Apparently a friend of Tooru Amuro, too.
- Big Brother Mentor: For Takagi, who Date was assigned to a police mentor towards — Date even nicknamed them as the "Wataru Brothers". Including the typical death part, sadly.
- Big Ol' Eyebrows: Huge and thick black eyebrows.
- Forgotten Fallen Friend: This, too. Takagi and Amuro had made no mention of him until this case. In a sort-of meta example: Date was believed by some fans to be Scotch, the Cynicism Catalyst and FFF for both Amuro and Akai, but Aoyama disproved it.
- Look Both Ways: He didn't do this while trying to retrieve his notepad, got hit by a driver who fell asleep at the wheel of his car, and ended up dead for his trouble.
- Love Hurts: It hurts so much in his case, that his girlfriend Natalie crossed the Despair Event Horizon after identifying his corpse and hung herself.
- Name's the Same: In-Universe. He and Takagi had the same first name (albeit written in different characters), and Date referred to the two as the "Wataru brothers". A plot point: Fuemoto mistook Takagi for the already dead Date and put him in the Death Trap he had staged for him, not knowing that his target had kicked it.
- Oral Fixation: He often had a toothpick in his mouth.
- Posthumous Character: Is already dead before the main story, and has been for at very least two years.
- Sensitive Guy and Manly Man: The aggressive Manly Man to Takagi's passive Sensitive Guy.
Introduced in the Non-Canon Movies
Non-Serial Movie Phantom of Baker Street. He is Noah's Ark.
- Adorably Precocious Child: Subverted, if not deconstructed. While he is young (10) and bears as much adult responsibility (being a master programmer) as for the norm of this trope, he is portrayed as an angsty character. That does not prevent some fans from portraying him per the norm of this trope, though.
- Author Avatar: Often suspected to be one towards the movie's writer Hisashi Nozawa, not helped by the fact Nozawa himself committed suicide about 1.5 years after the movie screened.
- Barefoot Suicide: His death is implied this way.
- Bishounen: At 10, he's a kid edition, but he does have the looks for it.
- Brain Uploading: He pretty much coded his entire brain as Noah's Ark before his suicide. In the entire movie nobody even questioned whether Noah's Ark is Hiroki.
- Child Prodigy: Deconstructed. This poor kid's life sucked because he was one.
- Deus Angst Machina: Consider all tropes surrounding him, and consider his age. Everyone would have reached their Despair Event Horizon.
- He Knows Too Much: What is being said is the immediate reason for his death is because he found out Schneider was the direct descendant of Jack the Ripper.
- Heroic Sacrifice: his self-destruction at the end of this movie was that an AI of that complexity is too early for this world and would easily be controled by the bad guys.
- Ill Boy: While this has not been further expounded about, it certainly does not help with his social issues. But it's not what takes his life.
- Improbable Age: Remember, he's studying grad school in MIT and written two marketable, major pieces of software at 10 years old, it's pretty exaggerated. Of course, this is also a deconstruction, as he has huge emotional problems because of it.
- Intelligence Equals Isolation: A pretty tear jerking example as this was not because of his failure to connect with others. In the beginning, Japanese schools just ignored his intelligence. Under the wing of Schneider, he got accelerated at an improbable rate—and in effect became house arrested by Schneider.
- I Just Want to Have Friends: He almost has no friends.
- Innocent Prodigy: He switches between this and Wise Beyond Their Years.
- Lonely Rich Kid: While under foster care by Schneider, although the reason is a bit different from the the standard of that trope—Schneider put him in a highly accelerated educational program and then pretty much put him to work. Understandably, he was a bit broken for that.
- Parental Abandonment: His parents separated over his education, and he followed his mother to the US. Not long after that, his mother died.
- Plot-Triggering Death: Were he alive, the entire plot didn't exist at all.
- One Steve Limit: Averted and then played straight. Hiroki is a very common male name in Japan, and there has been at least two one-timer that has the same name before him. Although, referring to "Hiroki" without any quantification usually refers to him
- Starts with a Suicide: What begins his case.