[[folder:Makoto Kyougoku]]
->''Voiced by NobuyukiHiyama (JP)'', Ricardo Maturana (third Latin-American Spanish dub)

A famous karate champion who becomes Sonoko's long-distance boyfriend later. He's from Izu and his family owns [[http://en.wikipedia.org/wiki/Ryokan_(Japanese_inn) a ryokan there]].

[[ThemeNaming Mandatory Naming Note]]: The last two kanji naming note]]: All of his name (-goku Makoto) is AlternateCharacterReading of [[http://en.wikipedia.org/wiki/Kyokushin_kaikan Kyokushin]], a major school of karate (This has been [[LampshadeHanging lampshaded]] in-universe).the codenames are related to alcoholic beverages.

* TheAce: Holds the record of being undefeated in ''400 matches'' around ''the world''.
* {{Adorkable}}: He gets easily flustered when he's with Sonoko.
* AmbiguouslyBrown: On the darker side of someone from Tokyo.
* BigDamnHeroes: Not bad at these.
* CharlesAtlasSuperpower: Through nothing but a harsh, disciplined training in karate that has dominated most of his life, Makoto Kyogoku can defeat a small army of hired thugs, knock out armed criminals and [[DodgeTheBullet dodge bullets]].
* CrazyJealousGuy: {{Downplayed}}. We don't to see it to great extent since he only appears from time to time, but we can tell from his first appearance that he '''does not''' like any guy hitting on Sonoko.
* GeniusBruiser: Makoto is shown to have an astute mind due to his extensive training, [[spoiler:being able to identify Kaitou Kid disguised as Sonoko because of a difference in finger lengths.]] This is possible because he can take full dimensions of a person he meets in moments. It is a habit of analyzing his opponents physical features with a glance.
* GentleGiant: Makoto is a [[{{Adorkable}} dorky]], [[NiceGuy sweet guy]] and is one of the tallest characters in the series.
* LongDistanceRelationship: With Sonoko.
* LoveAtFirstSight: Makoto actually saw Sonoko for the first time when she was cheering for Ran in a karate tournament, and since then he had a crush on her. The ''Episode One'' special confirms it by showing him in the fateful tournament that Ran won and led her and Shinichi to go to Tropical Land together.
* MadeOfIron: Seems to have an uncanny resistance to pain. Come on, he gets a knife ''stuck'' in his left arm and just says he's okay!
* NervesOfSteel: As a master martial artist, Makoto is usually cool and collected, especially in crisis situations.
* NiceGuy: He can be awkward, but he's also brave, honest, polite, selfless, and deeply loves Sonoko.
* ObliviousToLove: He's ''horribly'' NotGoodWithPeople, so he seems to have a hard time picking up on her "subtle" hints--in the Valentine's Day episode where she went to a resort with Kogoro's family to make a chocolate heart for (she told Makoto) "the person she cared for most," Makoto showed up to see who this person was and if he was a suitable companion for her. [[spoiler:This turned out to be a good thing, as he arrived just in time to help KO two murderers who got the drop on everyone else.]] When he asked who it was and Sonoko pointed at him, he turned around to look behind him.
* OfficialCouple: With Sonoko Suzuki.
* OneManArmy: He can also take out several guards with guns ready to fire at point-blank range.
* PointlessBandAid: Near his left eye.
* RedBaron: "The Prince of Kicks", according to Ran.
* SavvyGuyEnergeticGirl: The Savvy Guy ({{adorkable}} and kinda more oblivious than the average "savvy guy") to Sonoko's Energetic Girl (an easily emotional GenkiGirl).
* SingleTargetSexuality: Makoto has only ever shown a romantic interest in Sonoko.
* SkilledButNaive: Very talented karate expert. Very naive in any social interactions.
* SmartPeopleWearGlasses: He wears contacts when he spars, but Makoto does wear glasses. And he's been shown to have a keen eye for detail. [[spoiler:A skill that allowed him know that Kaitou Kid had disguised himself as Sonoko.]]
* TallDarkAndHandsome: Tall, dark-skinned, and extremely good-looking.


[[folder:Azusa Enomoto]]
->''Voiced by MikikoEnomoto (JP)'', Betsabé Guitérrez and Josefina Becerra (third Latin-American Spanish dub)

An employee of Café Poirot, the coffee shop directly underneath the Mouri Detective Agency. She is often seen serving Mouri a cup of coffee and occasionally gives him a case that needs to be solved.

* ArtEvolution: To say her appearance drastically changed as the series went on would be quite an understatement. She's literally had [[http://www.detectiveconanworld.com/wiki/File:Azusa_-_1st_Version.jpg three]] [[http://www.detectiveconanworld.com/wiki/File:Azusa_-_2nd_Version.jpg different]] looks including her most recent appearance seen here.
* MonsterOfTheWeek: Her brother, Sugihito Enomoto, becomes a murder suspect for the ''Present from the True Culprit'' case.
* NiceGirl: always sweet, kind and ready to help.
* SatelliteCharacter: Mostly acts as a connection for Mouri to have a place to sit down and discuss upcoming cases.

[[folder:Yoko Okino]]
->''Voiced by Creator/YuriAmano / Creator/MikiNagasawa (JP)''

* HarpOfFemininity: A scene of a TV drama she's starring on in-story has her playing the harp while in a very girly PimpedOutDress.
* IdolSinger: Her day job. She also used to be a member of an idol singer group, and her former teammates appear in one case.
* MistakenForRomance: She and her former classmate Ryusuke Higo once go into a friendly outing. Everyone else thinks they're dating, including [[ClingyJealousGirl Ai]] and [[LoonyFan Kogoro]].
* PluckyGirl: The day after [[spoiler: her ex-boyfriend was SpurnedIntoSuicide and framed her as he died]], Yoko returned to work. Ran comments on her strength of mind and heart.
* SpoiledSweet: She's very, ''very'' rich and famous, but remains a very kind and gentle girl nevetheless.

[[folder:Fusae Campbell Kinoshita]]
->''Voiced by Creator/EikoMasuyama (JP)''

Famous fashion designer using gingko leaves as her personal motif.

* AllOfTheOtherReindeer: Because she had unusual features for a Japanese person (i.e. blond hair), she was viciously teased by her classmates, sans [[NiceGuy Professor Agasa.]]
* ButNotTooForeign: One can guess from the name. Although her introduction arc also discussed a RealLife issue: she tends to hide her blond hair as the ''very'' xenophobic Japanese [[ValuesDissonance would have quite a bit of prejudice against people of mixed blood like her]]. And specially when her story was supposedly set ''40 years ago'', few after UsefulNotes/WorldWarII.
* ChildhoodFriends: with Agasa, bordering on ChildhoodFriendRomance.
* GirlishPigtails: Her hairstyle when she was in the first grade.
* FlowerMotifs: She's an accessory fashion designer with a ginkgo leaf-themed brand.
* NiceGirl: Fusae has a kind and caring personality, evidenced when she loaned Ran her umbrella while waiting for Agasa ten years prior to the current timeline.
* NiceHat: Currently, Fusae sports a low hat.

[[folder:Reiko Kujou]]
->''Voiced by Creator/RicaMatsumoto (JP)''

A beautiful and strong-willed attorney who serves as Eri's rival.

* CanonForeigner: Only appears in the anime.
* HelloAttorney: She is quite attractive attorney.
* TheRival: To Eri.

[[folder:Tomoko and Shiro Suzuki]]
->''Tomoko Suzuki is voiced by Creator/MiruHitotsuyanagi (JP), Amy Rosenthal (EN)''
->''Shiro Suzuki is voiced by Creator/FumioMatsuoka (JP)''

Sonoko and Ayako's wealthy parents.

* BeautyMark: Beneath Tomoko's left eye.
* DubNameChange: Selma Sebastian for Tomoko in the english dub.
* HappilyMarried: Obviously, it's between these two.
* JewishMother: Tomoko can be ''very'' controlling when it comes to who she prefers for Sonoko to date.
* LongBusTrip: Sonoko's parents are introduced during Kaito Kid's first Manga/DetectiveConan appearance (chapters 156-159), but have been complete no-shows until [[TheBusCameBack finally making a reappearance]] during ''Kaito Kid vs Makoto Kyougoku'' (chapters 862-864). Amazing how it's still the same voice actors after so long.
* PornStache: Shiro's.
* ReasonableAuthorityFigure: Compared to his wife, Shiro is a much more accepting person.
* TeamDad: Shiro tries to be this if Tomoko's actions go too far.

[[folder:Jirokichi Suzuki]]
->''Voiced by Creator/IchiroNagai (JP)''

Sonoko's retired uncle. He spends most of his wealth and free time thinking up bizarre traps to finally catch Kaito Kid.

* ABoyAndHisX: Jirokichi's closest companion is his dog Lupin, who is his best friend, bodyguard, and safekeeper in one person (or hound).
* BigOlEyebrows: Look at the picture.
* CoolOldGuy: Outside of his fervour in capturing Kaito Kid, he is a very amiable person and gets along well with his niece and her friends.
* CoolUncle: For Sonoko.
* GlorySeeker: His sole reason for capturing Kaito Kid stemmed from the fact that the latter has been stealing the limelight from him in the media.
* ScrewTheRulesIHaveMoney: He uses his considerable wealth to purchase rare and legendary gemstones and jewels for use as a bait for Kid, and to design ingenious traps to catch the master thief in the act.

[[folder:Ayako Suzuki]]
->''Voiced by ChiharuSuzuka (JP), Cynthia Cranz (EN)''

Sonoko's elder sister, a gentle young woman who offers quite the contrast with her boisterous little sister.

* TheCameo: After being absent for 700+ chapters, she makes a brief background appearance during ''Kaito Kid vs Makoto Kyougoku'' alongside Yuzo.
* CoolBigSis: Is this for Sonoko.
* DubNameChange: Angie Sebastian
* EyesAlwaysShut: Self explanatory.
* ItsAllMyFault: During the case she's introduced, she blames herself for [[spoiler: the murder of Chikako and the attack on Ran]] since the reunion was her idea.
* OfficialCouple: With Yuzo.
* TheOjou: More of a Type 1 than Sonoko.

[[folder:Yuzo Tomizawa]]
->''Voiced by Creator/YasunoriMatsumoto (JP)''

Ayako's fiance, and Sonoko's future brother-in-law. Yuzo is a young painter, and the son of another rich family.

* {{Adorkable}}: For some.
* TheCameo: After being absent for over 700+ chapters, he makes a brief background appearance during ''Kaito Kid vs Makoto Kyougoku'' alongside Ayako.
* DubNameChange: Tod Appenheimer.
* OfficialCouple: With Ayako.
* SameSexTriplets: The youngest of them. Subverted in that save for their eyes, they don't look THAT alike.
* SelfMadeOrphan: [[spoiler:Averted. He was one of the three suspects alongside his triplet siblings Taichi and Tatsuji, but he wasn't the culprit. It was the eldest, Taichi.]]


[[folder:Midori Megure]]
->''Voiced by Creator/AiOrikasa (JP)''

Inspector Megure's wife.

* AlliterativeName: '''M'''idori '''M'''egure.
* GenreSavvy: She wore long skirts to ''deliberately'' draw the SerialKiller towards herself, since she acted as a DecoyDamsel to get justice for said killer's murder of her best friend. Lampshaded when she lays injured in Megure's arms in his flashback, and she tells him "it didn't work like in the movies."
* GoodScarsEvilScars: Has a scar on her forehead, [[spoiler: coming from the incident in which both she and Megure were almost killed.]]
* HardDrinkingPartyGirl: Is seen [[DrowningMySorrows drowning her sorrows]] when she thought her husband forgot to give a present for her in White Day.
* {{Joshikousei}}: When in highschool, and actually [[spoiler: a very important point in the case she was involved in, as the [[NonUniformUniform length of her school skirt]] (often used by girl {{delinquent}}s) drew a SerialKiller to her.]]
* SilkHidingSteel: Her introductory episode shows a skill for subtlety. Also, she can be rather hot-tempered in the ''very'' few times she gets angry.
* UglyGuyHotWife: Juzo isn't a {{Gonk}}, but still.

[[folder:Hikaru Yasumoto]]
->''Voiced by Creator/AkikoHiramatsu (JP)''

Dr. Araide's housekeeper.

* CuteClumsyGirl: ''Not'' PlayedForLaughs, as Dr. Araide Sr. treats her harshly due to her blunders.
* IllGirl: She met the Araide family when she was hospitalized, then started working for them.
* ShrinkingViolet
* UnrequitedLove: [[spoiler:She might have feelings for Dr. Araide Jr.. No one would blame her, tho.]]
* UnwittingPawn: [[spoiler:And Conan, Inspector Megure, and Dr. Araide's second wife/killer make sure it stays that way. Would ''anyone'' want to know that they accidentally killed someone by flipping on the lights at the worst moment? [[TheWoobie Poor Hikaru]].]]

[[folder:Midori Kuriyama]]
->''Voiced by Creator/AsakoDodo (JP)''

Eri's secretary.

* SexySecretary: She works as Eri's secretary and is quite attractive.

[[folder:Samizu Kichiemon]]

A deceased doll-maker dating back to the Bakumatsu era. Samizu was known as a genius that developed dangerous contraptions to safeguard several precious objects and gems.

Throughout the series, Conan and company come across some of his famous inventions that have lasted until the current day, and serve as some of the series' cases that requires Conan to figure out how Samizu's contraptions work.

* BadassGrandpa: The few images seen of Samizu portrays him as an old man, and given the neat contraptions he made during his lifetime, he was damn good at his work.
* CrazyPrepared: Samizu knew how to come up with a few crazy tricks related to some of the structures and safes that Samizu built over the years to hide certain things of value.
* GadgeteerGenius: Invented dangerous mechanical contraptions and structures to safeguard precious objects.
* PosthumousCharacter: A character that's been long dead since he's from a time-period that took place in the 1800s.

[[folder:Sakurako Yonehara]]
->''Voiced by Creator/SakuraTange (JP)''

A recurring housemaid who had previously gone to the same school as Naeko and Chiba.

* ChildhoodFriends: With the rookie traffic cop Naeko Miike and Officer Chiba.
* MysteryMagnet: Poor girl cannot seem to avoid running into murder cases in her workplaces. Which was [[LampshadeHanging lampshaded]] by Inspector Megure, who fervently hoped that she does not turn into another Kogoro.

[[folder:Shuukichi Haneda]]
%%[[caption-width-right:300:some caption text]]
-->Voiced by: Creator/ToshiyukiMorikawa

Yumi's ex-boyfriend who is actually a professional TabletopGame/{{Shogi}} player. [[spoiler: Chapter 972 of the manga reveals that he is a member of the Akai family, more exactly Sera's mysterious "middle brother". His "Haneda" surname comes from his dead mentor, the mysterious Kouji Haneda.]]

[[ThemeNaming Mandatory Naming Note]]: His full name Shukichi Haneda (羽田 秀𠮷) and the in-story nickname Taiko (太閤) are both references to UsefulNotes/ToyotomiHideyoshi (豊臣 秀吉), who was renamed from Hashiba Hideyoshi (羽柴 秀吉). Additionally, Haneda's "Hane" (羽) also comes from [[http://en.wikipedia.org/wiki/Yoshiharu_Habu Yoshiharu Habu]] (羽生 善治), a real-life professional shogi player who has won all seven titles.

* AffectionateNickname: Yumi calls him "Chukichi" because, when he eats [[TrademarkFavoriteFood cheese]], he makes a "chu" sort-of noise.
* AwesomenessByAnalysis: As a professional shoji player, Shukichi is very intelligent. He was shown to be able to participate in solving a murder case next to his house, where he effectively figured out the trick behind the victim's suicide note, as well as the culprit's identity.
* GottaCatchThemAll: His ambition is to win all seven professional shogi title tournaments.[[note]]Meijin, Ryu-oh, Kisei, Oi, Oza, Kioh, Osho[[/note]]
* HiddenDepths: He seems to know more about Conan than he lets on. In their first meeting, he's silently saw and immediately recognized Conan's deduction skills.
* HyperAwareness: Appears to be able to pick out clues in his introductory case at around the same time as Conan. Justified that this ability is probably what made him a successful shogi player.
* ImprobableHairstyle: Shukichi is perhaps the most characterized by his hair, which sticks up in the back like a bed head.
* InsecureLoveInterest: Believes that he is unworthy of Yumi until he can win all seven professional shogi title tournaments.
* LivingADoubleLife: Actively conceals his profession from Yumi as he does not want her to know about his rising celebrity status (he already won four of the seven titles as to date) before his ambition is fulfilled. Also helped by the fact that Yumi does not seem to keep track of news from the shogi world.
* MeaningfulRename: He changed his surname to the one of his BigBrotherMentor, Kouji Haneda. [[spoiler: Probably to hide his identity as a member of the Akai and Sera family, and to honor Kouji after his murder.]]
* NiceGuy: Haneda has a very cheerful personality.
* PermaStubble: As seen in the picture.
* PhotographicMemory: Haneda is extremely skillful at memorizing, as shown when he managed to remember the code written on Sakurako's paper despite having only seen it for a very short amount of time. He also claims to be the best in this field.
* TheReveal: [[spoiler: Chapter 972 of the manga confirms that he is the mysterious "second brother" of the Akai family, alongside all but confirming Mary aka the Mysterious Child as the matriarch.]]
* SmartPeopleWearGlasses: Has a keen eye and amazing deduction prowess on par with Conan.

[[folder: Mary]]
-->Voiced by: Creator/AtsukoTanaka

An odd pre-teen girl who showed up very recently in both manga and anime, and is shown to be secretly living with [[spoiler: Masumi Sera.]] [[spoiler:Confirmed in 972 as the matriarch of the Akai family, a woman in her late 40/maybe even almost 50's who is now stuck as a pre-teen.]]

[[ThemeNaming Mandatory Naming Note]]: "Mary" probably comes from Watson's first wife, [[Literature/TheSignOfTheFour Mary Morstan]].

* {{Bifauxnen}}: She looks fairly androgynous, and asks [[spoiler: Sera]] to introduce her as "her little sister from outside the domain" if somebody asks.
* ButNotTooForeign: Her blonde hair, green eyes, and english name scream foreigner but [[spoiler: since her maiden name, Sera, is clearly Japanese, that implies she has Japanese heritage somewhere in there.]]
* {{Foreshadowing}}: She has sharp eyes similar to [[spoiler: Akai's and Sera's]] and is seen super happy when she sees [[spoiler: Shuukichi winning his shougi matches.]] This subtly hints to a connection between them - [[spoiler: She's almost surely their mother.]]
* IllGirl: Almost always seen having an unexplained cough.
* TheReveal: [[spoiler: 972 pretty much confirms Mary as the matriarch or mother figure of the Akai family.]]
** Chapter 849 [[http://serinoxtv.tumblr.com/post/157097145536 sneaks some more info]]: [[spoiler: It shows a legal paper with the names of Haneda Shukichi's parents, which was far more blurry in the manga: the father's name is Tsutomu Akai... and the mother's is Mary Sera.]] So yeah...
* SugarAndIcePersonality: She acts cool and poised, but seems to be genuinely giddy when she sees Haneda win one of his matches.
* TeensAreShort: Conan describes her as looking about middle-school aged, yet she isn't all that much taller than Conan in size and is considerably shorter than high schooler Masumi Sera when they're seen together.
* VocalDissonance: Looks like a middle school aged child...and sounds like a mature adult woman. [[spoiler: This only boosted the speculation that she's an [=APTX=] victim, which is all but confirmed in 972: in a flashback to 10 years ago there's a woman with a young adult son (Akai), a teenage second son (Shuukichi), and a little daughter (Sera), and she looks ''exactly'' like an adult Mary.]]
* WiseBeyondHerYears: She seems to be very mature for someone who is middle-school age (12-15 in Japan) ''tops''. [[spoiler: It's been speculated that she might be another victim of the Organization, shrunk by the same drug that made Shinichi/Conan and Ai/Shiho into "kids". Recently, its come to light this may very well be the case, as in 959 Sera, while panicking, called her "mama", plus 972 has a woman who looks ''exactly'' like her and is referred to as "Mary-okaasan" ("Mom Mary") by Shuichi and Shukichi...]]

[[folder: Momiji Ooka]]
-->Voiced by: Creator/SatsukiYukino

A schoolgirl who seems to have a special connection with Heiji Hattori...


* AscendedExtra: She's set to be one: the still-in-development (as of March 2017) Movie 21 is supposed to be about her, Heiji and Kazuha.
* AwesomenessByAnalysis: She catches on some clues of the second case she's in... before Amuro or Conan do. Even better, ''she wasn't there to start with'': someone she knew [[spoiler: (her butler Iori Muga)]] gave her details through cellphone, she decoded them and relayed her discoveries to him. ''Even adding some stuff that her informant had not caught on.''.
* {{Foil}}: Towards Kazuha. Kazuha is an middle-class ActionGirl with long hair in a ponytail, a dark-blue SailorFuku, rather tomboyish behavior and looks, who doesn't aim to be an AmateurSleuth, ''and'' who can go from TsunDere to TongueTied regarding Heiji; Momiji, on the other hand, is a [[TheOjou very rich girl]] with shorter hair and no HairDecorations, a white and gray SailorFuku, very GirlyGirl-like mannerisms (i.e. she paints her nails in rather elaborate patterns and wears small earrings), is implied to be an AmateurSleuth, and is very vocal about her feelings for Heiji. [[spoiler: And both of them know Heiji since childhood.]]
* TheOjou: The IceQueen type with some dashes of SpoiledBrat, from what it's been shown. Her family's butler Iori Muga follows her everywhere and, when not wearing her SailorFuku, she's seen in [[KimonoIsTraditional a kimono]].
* PassionateSportsGirl: Sorta, as she's the junior champion of the [[https://en.wikipedia.org/wiki/Uta-garuta hyakunin issha garuta]] card game.
* PinkySwear: In the trailer for the 21th movie, she's seen making one [[spoiler: with none other than Heiji]].
* SailorFuku: Shown wearing one in her manga introduction. The 21th movie's trailer shows that it has a white blouse, light gray collar/skirt, dark blue scarf and dark grey lines on its collar and cuffs.
* SelfProclaimedLoveInterest: She seems to be dead set on marrying Heiji. [[spoiler: Some notes suggest that she ''might'' have a shared past with him, probably a ChildhoodMarriagePromise. The [[http://yesyunniechan.tumblr.com/post/157833798796/karakurenai-no-love-letter-trailer-english trailer of the 21th movie]] supports this as there are mentions of a promise the two apparently made, coupled with an image of a young Heiji and a young Momiji making a PinkySwear.]]

[[folder: Hina Wada]]
->''Voiced by Creator/MikakoKomatsu''

Another school girl, and a strong karate practitioner.


* ActionGirl: A skilled karateka, probably on par with Ran.
* TheCameo: She briefly appears in the ''Detective Conan Episode One'' anime special, apprehending a thief on her own as Ran and Shinichi walk past.
* HairDecorations: A simple hairclip.
* TheRival: Considers herself as one for Ran.

[[folder: Rumi Wakasa]]

A school teacher who works at Teitan Elementary, as Sumiko Kobayashi's [[NumberTwo assistant]].


* CuteClumsyGirl: Her clumsiness is mostly played for laughs. [[spoiler: Until 988, where Conan and Ai realize that it's may linked to lack of peripheral view... opening the possibility of her being the infamous Rum.]]
* {{Meganekko}}: A gentle-looking woman ([[ObfuscatingStupidity most of the time]]) who wears glasses.
* ObfuscatingStupidity: She presents herself as a [[SenseiChan well-intentioned but clumsy and a bit child-like woman]], but in her introductory case she donned a [[BadassTeacher far more badass persona]] complete with ScaryShinyGlasses as soon as Conan and Co. were away. [[spoiler: This has made the fandom wonder if she ''is'' the infamous Rum after all: in 988 Ai and Conan speculate that, like other people suspected to be Rum, she seems to be unable to see from her right eye...]]
** In 988, as she speaks to [[spoiler: Superintendent Kuroda]], Rumi slips into a far more serious persona with a very dry wit and a sharp glance.
** In 989, when the suspect of the case grabs Ayumi and tries to use her as a hostage, [[MamaBear Rumi]] gives him both the ''mother'' of {{death glare}}s and a borderline SlasherSmile, terrifying the guy so much that he drops his guard and this allows [[spoiler: Kuroda]] to disarm him and rescue Ayumi.
* ShrinkingViolet: Subverted, she looks sweet and unasuming but at times it's all but it's stated (and shown) that she's tougher than she looks.
* TheReveal: 987 reveals a ''huge'' detail [[http://yesyunniechan.tumblr.com/post/157241375266/detective-conan-file-987-japanese-to-english from her past]]: [[spoiler: When Kouji Haneda's body was found, 17 years ago, a young Rumi was there and was even caught on a photo. Superintendent Kuroda wonders why as he makes research about the case, and he speculates whether Rumi was Haneda's girlfriend or relative.]]


[[folder: Kouji Haneda and Amanda Hughes]]

Two persons who died in similar and ''very'' mysterious circumstances several years ago. Kouji was a friend of Shuukichi Haneda and a shogi champion who also played chess, Amanda was a rich American woman and a fan of his, and both of them died in the same American hotel. [[spoiler: Ai says that Kohji Haneda's name was on the list of people killed by APTX 4869.]]

[[ThemeNaming Mandatory Naming Note]]: "Kouji Haneda" (羽田 浩司 Haneda Kōji?) probably comes from Yoshiharu Habu (羽生 善治 Habu Yoshiharu?) and Kōji Tanigawa (谷川 浩司 Tanigawa Kōji?), real-life shogi players.


* BigBrotherMentor: Kouji was this to Shuukichi, who apparently [[MeaningfulRename took up his surname]] out of respect for him. [[note]](Kohji's given name is 浩司, and the first character's radicals are (氵 ノ 土 口). 土 is earth's do. Shukichi's given name is spelled 秀𠮷, with the final "kichi" kanji also including the radical for earth's do. This 𠮷 for kichi is a very rare variant; 99% of the time kichi is written as 吉 with 士 (man/samurai's shi) instead.)[[/note]]
* BodyguardBetrayal: [[spoiler: It's been speculated that Amanda's bodyguard Asaka, who went missing when she and Kouji died, was actually the B.O. agent Rum in disguise and that he killed both Kouji and her.]]
* DyingClue: Some of these were left in the place where Kouji died. [[spoiler: It spelled the name "ASACA RUM".]]
* HeKnowsTooMuch: [[spoiler: Probably the case with Amanda, since she seems to have been in good terms with people from the CIA and FBI.]]
* PosthumousCharacter: Both of them died 17 years ago.
* SmallRoleBigImpact: [[spoiler: This case is what inspired Shuichi Akai to start working for the FBI.]]
* SmartPeoplePlayChess: The very smart Kouji played both traditional chess and shougi, which is known as "Japanese chess".

[[folder: Tsutomu.]]

A mysterious man who has been missing for almost 17 years... [[spoiler: His whole name is Tsutomu ''Akai'', and he is Mary's husband plus the father of Shuichi Akai, Shukichi Haneda, and Masumi Sera.]]

[[ThemeNaming Mandatory Naming Note]]:The kanji in his name, 務武, can also be read as "Zumu". This is a possible reference to [[spoiler: Zeon Zum Deikun (ジオン・ズム・ダイクン Jion Zumu Daikun?), the father of Char Aznable... hinting at him being the father of Shuichi Akai.]]


* DisappearedDad: The missing patriarch of the [[spoiler: Akai]] family. It's specially strong in the case of his youngest child, [[spoiler: since he disappeared ''before'' said child, Masumi, was born.]]
* ItsPersonal: His eldest child [[spoiler: Shuichi]], was quite affected by his disappearance.
* MysteriousPast: It seems he was involved in [[spoiler: the deaths of Amanda and Haneda]] and ''somehow'' gained lots of enemies, so as a result he had to send his whole family away.
* StrongFamilyResemblance: He's said to look a lot like his middle child, [[spoiler: Shukichi Haneda]]

[[folder: Iori Muga]]

->''Voiced by Creator/DaisukeOno''

A servant of the Oouka family, plus Momiji's devoted companion.

[[ThemeNaming Mandatory Naming Note]]: His name, Muga Iori, comes from Iori Sakakibara (榊原 伊織 Sakakibara Iori?), a doctor and close friend of Ooka Tadasuke in the series Ōoka Echizen, and Muga Takewaki (竹脇 無我 Takewaki Muga?), the actor who plays the role of Iori Sakakibara in the series.


* TheButlerDidIt: He's seen as a suspect in a case, but he's an obvious RedHerring. Plus he was in a disguise so ''no one knew he was a butler to start with''.
* MasterOfDisguise: His first apparition has him calling himself "Shinichi Wada", using fake glasses, and hiding his long hair under a NiceHat.
* MeaningfulName: The name he once used when under a disguise, Shinichi Wada, was also the localized name of Dr. Watson in one of the first translated releases of ''A Study in Scarlet'' in Japan.
* ShipperOnDeck: Fully supports Momiji's bid for [[spoiler: Heiji Hattori]]'s heart.
* TallDarkAndHandsome: He has odd MessyHair, but other than that he's pretty good-looking.

[[folder: Soushi Okita]]

A handsome, cheerful fellow who is Heiji's ''other'' rival, this time in kendo. He attends Momiji's school.

[[ThemeNaming Mandatory Naming Note]]: Logically, named after the legendary swordsman Okita Souji (沖田 総司). Okita himself is a descendant of the legendary one in-story.


* CanonImmigrant: He's actually a character from ''Manga/{{Yaiba}}''.
* HandsomeLech: Yet another good-looking fellow who hits on the beautiful [[HelloNurse Ran]]. [[AmusingInjuries And Heiji whacks him for his trouble]]
* KendoTeamCaptain: For his Kyoto-based school.
* TheRival: For Heiji Hattori.
* SamuraiPonytail: He's a kendo expert and has long hair tied in a 'tail.
* YouHave48Hours: When someone's murdered right outside the building hosting a kendo tournament that he and Heiji are attending, Heiji promises to solve the case in less than an hour. Okita, who considers Heiji his WorthyOpponent, accepts.