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renamed to Intimacy Via Horror, example is misuse
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* GirlsAreReallyScaredOfHorrorMovies: Averted; Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
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* GirlsAreReallyScaredOfHorrorMovies: Averted; Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes. In Season 2, she handles not one, but ''all'' the snakes in one of the challenges - and that challenge wasn't even planned ''for her''; it was meant to be solved by Jaewook.
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* AwesomeButImpractical: The Go-Pro cameras attached to Kwangsoo's backpack look cool, but these also get stuck and hit a lot of places. One of his cameras fall off in Season 2, [[spoiler:because he hit the window while escaping K's vacation home while he was escaping.]]
to:
* AwesomeButImpractical: The Go-Pro cameras attached to Kwangsoo's backpack look cool, but these also get stuck and hit a lot of places. One of his cameras fall off in Season 2, [[spoiler:because he hit the window while escaping K's vacation home while he was escaping.]]]] He eventually ditches them at Season 3.
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Nice Hat is now a disambig.
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* NiceHat: Is always seen wearing one, because it's one of Literature/SherlockHolmes's defining traits.
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* NiceHat: His "magician's hat" which he wore in his first appearance.
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* NiceHat: He uses one in a magic show. [[spoiler:It's the same one that a certain detective wore...]]
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* {{Bishonen}}: The other members comment on his good looks pretty often, but he's yet to use it to his advantage in a case.
* PrettyBoy: The other members comment on his good looks pretty often, but he's yet to use it to his advantage in a case.
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* YouGottaHaveBlueHair: Sehun shows up in orange hair in the first few episodes of Season 2.
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* PutOnABus: Doesn't appear in Season 3, without any in-universe explanation for his absence; the other detectives don't even mention him.
to:
* PutOnABus: Doesn't He doesn't appear in Season 3, without any in-universe explanation for his absence; the other detectives don't even mention him. him.
* WhyDidItHaveToBeSnakes: Jaewook is shown to be terrified by snakes in the second chapter of Season 1. In the first chapter of Season 2, the challenge planned for him requires him to handle snakes to a tank in order to free himself. [[spoiler:Sejeong ends up solving the challenge for him.]]
* WhyDidItHaveToBeSnakes: Jaewook is shown to be terrified by snakes in the second chapter of Season 1. In the first chapter of Season 2, the challenge planned for him requires him to handle snakes to a tank in order to free himself. [[spoiler:Sejeong ends up solving the challenge for him.]]
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* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
to:
* GirlsAreReallyScaredOfHorrorMovies: Averted; Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.snakes.
* FaceHeelTurn: The second half of Season 3 hints that she may be the godmother behind the Hwalbindang (a SerialKillerKiller organization); the team also finds K's notes on the detectives, where he points out that Minyoung has a 95% chance of becoming a criminal. [[spoiler:Ultimately averted; Minyoung has no relation to the Hwalbindang and while the real godmother believes Minyoung will let her teammates die to save herself, she doesn't hesitate to cooperate with them, allowing everyone to survive the final challenge.]]
* FaceHeelTurn: The second half of Season 3 hints that she may be the godmother behind the Hwalbindang (a SerialKillerKiller organization); the team also finds K's notes on the detectives, where he points out that Minyoung has a 95% chance of becoming a criminal. [[spoiler:Ultimately averted; Minyoung has no relation to the Hwalbindang and while the real godmother believes Minyoung will let her teammates die to save herself, she doesn't hesitate to cooperate with them, allowing everyone to survive the final challenge.]]
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* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
to:
* GirlsAreReallyScaredOfHorrorMovies: Averted; Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.snakes. In Season 2, she handles not one, but ''all'' the snakes in one of the challenges - and that challenge wasn't even planned ''for her''; it was meant to be solved by Jaewook.
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* PutOnABus: Doesn't appear in Season 3, without any in-universe explanation for his absence; the other detectives don't even mention him.
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Called the "dancing sleuth" because of his main job as a choreographer, Sehun is one of the passive members of the team, only brightening up when it comes to women or if something tugs at his competitive side.
to:
Called the "dancing sleuth" because of his main job as a choreographer, Sehun is initially one of the passive members of the team, only brightening up when it comes to women or if something tugs at his competitive side.
* TookALevelInBadass: In Season 1, Sehun contributes very little to solving the puzzles and mysteries. Come Season 3, and he actually manages to find the solutions for several problems before even Minyoung can figure them out.
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!!Ahn Igwon
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!!Ahn Igwon
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* StraightMan: Is the most serious of the detectives, which leads to him being paired with the most ridiculous members, or weirdest challenges.
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* TheStoic: Is much more reserved and level-headed than his more eccentric colleagues.
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!Main Characters
[[folder:Yoo Jaesuk]]
A cowardly neighborhood detective who solves his (small) cases with luck, Yoo Jaesuk becomes the humorous leader of K's detective team, though his members are often the ones who save him. He has the DNA of Literature/SherlockHolmes.
--> '''Played by''': [[TheDanza Yoo Jaesuk]]
* AnimalMotifs: His grasshopper motif from Series/RunningMan is often alluded to.
* ButtMonkey: Which led to him developing quite a suspicion for all types of boxes.
* CrackOhMyBack: Loves teasing Jaewook about this, only for he himself to say that he shouldn't be joking around because he'll be at that age soon.
* HeroicSacrifice: [[spoiler:In the last episode of the first season, he is involved in C's trailer's explosion because he wanted to retrieve K's microchip. He survives thanks to finding a secret passageway, but continues FakingTheDead anyway so he could tail the other members without them knowing.]]
* TheLeader: Of the detective team.
* TheLoad: The detective team notes that it's harder to clean up after Jaesuk's, Kwangsoo's, and Jongmin's messes than actually solving the cases.
* MysteriousWatcher: Jaesuk becomes one in between Season 1 and 2, testing if the members weren't suspicious before coming into contact with them again.
* NiceHat: Is always seen wearing one, because it's one of Literature/SherlockHolmes's defining traits.
* NumberTwo: [[spoiler:Becomes one to K in between Season 1 and 2.]]
[[/folder]]
[[folder:Ahn Jaewook]]
A former agent who now works as a private detective, Jaewook is the eldest member of the team and is most prone to nagging. His connections, especially with the police, prove helpful to the team in cases where they need it.
--> '''Played by''': [[TheDanza Ahn Jaewook]]
* CrackOhMyBack: Not just his back, but also his eyesight is picked on by the other members of the team.
* IntergenerationalFriendship: Jaewook and Sehun, who frequently team up with each other to "bridge" their 23-year age gap.
[[/folder]]
[[folder:Kim Jongmin]]
An errand-runner, with his job usually being a loan shark, Jongmin is easily considered TheLoad both in physical and mental activities: though he works well whenever no one is watching him and is exceptionally good at eavesdropping.
--> '''Played by''': [[TheDanza Kim Jongmin]]
* ButtMonkey: Not just the cast members, but the guests too have their fun with teasing Jongmin.
* CrouchingMoronHiddenBadass: Along with Kwangsoo, he is one of the members to whom the others don't have any expectations at all, but he's usually the one who solves problems that Minyoung can't and pays attention to the situations they're stuck in.
* EatingTheEyeCandy: Always gushes over how pretty Minyoung is.
* TheLoad: Everyone teases him as this, especially when they take loads of time to explain to Jongmin what they need to solve in order to move on.
[[/folder]]
[[folder:Lee Kwangsoo]]
Unemployed and frivolous, Kwangsoo, with his Go-Pro antlers, is more of TheLoad than an actual help to the detectives. However, he has a surprising amount of intellect and survival skills, not to mention the endless humor he provides by just being... there. [[spoiler:He later flees from the team after stealing K's microchip.]]
--> '''Played by''': [[TheDanza Lee Kwangsoo]]
* TheAlcoholic: Kwangsoo is revealed to be a ''really'' bad drunk, which bites him in the ass when [[spoiler:he's framed for a murder he can't remember doing because he was too drunk the night before.]]
* AwesomeButImpractical: The Go-Pro cameras attached to Kwangsoo's backpack look cool, but these also get stuck and hit a lot of places. One of his cameras fall off in Season 2, [[spoiler:because he hit the window while escaping K's vacation home while he was escaping.]]
* ButtMonkey
* ChronicBackstabbingDisorder: The other cast members call out Kwangsoo for having this kind of reputation, which he strongly denies even though he's shown it in the course of the series. [[spoiler:He does it again, on a much larger scale, at the start of Season 2.]]
* {{Frameup}}: Believes himself to be a victim of this, as he could not remember [[spoiler:sleeping with and killing the girl in his hotel room. It turns out to be a frame-up.]]
* TheLoad
[[/folder]]
[[folder:Park Minyoung]]
A beautiful and fashionable former flight attendant, Minyoung isn't just the group's [[EatingTheEyeCandy eye candy]], but is also TheAce thanks to her swift deduction skills and expertise in English.
--> '''Played by''': [[TheDanza Park Minyoung]]
* TheAce: To the point that though everyone in the team claims themselves to be the ace, no one questions her actually being ''the'' ace, with the Genius Detectives Team wanting to recruit her to their side.
* ActionGirl
* AwesomenessByAnalysis: Solves most of the cases this way.
* DamselOutOfDistress: Most times, Minyoung and Sejeong are the ones who get themselves out of problems.
* FunWithForeignLanguages: Some cases require a good amount of English proficiency, in which the detective team is thankful for having Minyoung by their side.
* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
* PrettyInMink: Minyoung tends to wear a lot of clothes in this style, to the point that the other lampshade it by saying they're solving cases, not walking on a fashion show.
* TheSmurfettePrinciple: Minyoung is the only female in the team until Sejeong joins in episode 2.
* WomenAreDelicate: Averted with Minyoung and Sejeong, who tackle cases head-on.
[[/folder]]
[[folder:Oh Sehun]]
Called the "dancing sleuth" because of his main job as a choreographer, Sehun is one of the passive members of the team, only brightening up when it comes to women or if something tugs at his competitive side.
--> '''Played by''': [[TheDanza Oh]] [[Music/{{EXO}} Sehun]]
* {{Bishonen}}: The other members comment on his good looks pretty often, but he's yet to use it to his advantage in a case.
* CompetitionFreak: ''Big time''. He uses up all of Kwangsoo's money because he wanted to be the one to get all stuffed Pororos out of the claw machine, and completely solved a Rubik's cube in 5 hours because he was frustrated that he didn't know how to.
* DeclarationOfProtection: To Sejeong, though it seems like Sehun is the one who Sejeong needs to protect.
* IntergenerationalFriendship: Jaewook and Sehun, who frequently team up with each other to "bridge" their 23-year age gap.
* LikeBrotherAndSister: Sehun and Sejeong are called the "Se-Se Duo".
* RedHerring: He's set up as the [[spoiler:mole in the first episode, with all clues pointing to him, but said clues turn out to be applicable to Yeonseok as well.]]
* YouGottaHaveBlueHair: Sehun shows up in orange hair in the first few episodes of Season 2.
[[/folder]]
[[folder:Kim Sejeong]]
A high school student who is a big fan of mystery novels, Sejeong is the youngest member but also one of the brains of the team.
--> '''Played by''': [[TheDanza Kim]] [[Music/{{Gugudan}} Sejeong]]
* ActionGirl
* DamselOutOfDistress: Most times, Minyoung and Sejeong are the ones who get themselves out of problems.
* EatingTheEyeCandy: Apparently, Yook Sungjae is her style.
* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
* LikeBrotherAndSister: Sehun and Sejeong are called the "Se-Se Duo", and in the course of seasons 1 and 2, Sejeong has transitioned from calling Sehun "[[UsefulNotes/KoreanHonorifics hyung]]" to the more familiar "oppa".
* WomenAreDelicate: Averted with Minyoung and Sejeong, who tackle cases head-on.
[[/folder]]
[[folder:Lee Seunggi]]
Seeking out the detective agency after they opened the slot left by Kwangsoo in Season 2, Seunggi is a detective who wants to expand his career expertise by working in a detective team instead of by himself. [[spoiler:That's what he says, but...]]
--> '''Played by''': [[TheDanza Lee Seunggi]]
* AssassinOutclassin: [[spoiler:Minjae was planning to kill Seunggi after luring him out, but Seunggi turned the tables on him instead.]]
* BigBrotherInstinct: Is usually partnering up with Sehun when solving cases.
* DetectiveMole: [[spoiler:He joins the detective team in looking for the Flower Killer when in reality, he's the guy they're looking for.]]
* NiceHat: His "magician's hat" which he wore in his first appearance.
* SlasherSmile: [[spoiler:When it's revealed that he's the Flower Killer.]]
[[/folder]]
!Project D Team
[[folder:K]]
K, real name Ahn Naesang, is the one who gathered the detectives into one team, choosing to keep a close eye on them as they're subjects for his scrapped experiment, Project D.
--> '''Played by''': [[TheDanza Ahn Naesang]]
[[/folder]]
[[folder:C]]
C, real name Kim Jeongtae, is one of the head researchers involved in Project D. After a falling-out with K, he decides to steal the information for himself so he can use it to advance his personal objectives.
--> '''Played by''': [[TheDanza Kim Jeongtae]]
[[/folder]]
[[folder:Yoo Yeonseok]]
Yeonseok is just an average citizen who was one of the seven men invited to M's party, [[spoiler:until it turns out that he was the one who killed M, and later killed his colleague C, due to reasons circling K's "Project D". It's later revealed that he was one of the first test subjects of said project.]]
--> '''Played by''': [[TheDanza Yoo Yeonseok]]
* DetectiveMole: He is one of the ones who actively look for M's killer, when [[spoiler:he's actually the one who killed M.]]
* EasilyForgiven: Given how Yeonseok tried to [[spoiler:put them in danger or even kill them in the first two episodes, the detective team welcomes him rather warmly upon their reunion.]]
* HeelFaceTurn: [[spoiler:He comes to trust and work with the detective team, becoming its temporary SixthRanger.]]
[[/folder]]
!Genius Detective Team
[[folder:Jung Jaehyung]]
The leader of the Genius Detective Team
--> '''Played by''': [[TheDanza Jung Jaehyung]]
[[/folder]]
[[folder:Lee Juck]]
--> '''Played by''': [[TheDanza Lee Juck]]
[[/folder]]
[[folder:Lee Jangwon]]
--> '''Played by''': [[TheDanza Lee Jangwon]]
A member of his office's band.
[[/folder]]
[[folder:Shin Jaepyung]]
--> '''Played by''': [[TheDanza Shin Jaepyung]]
The mathematics ace of the Genius Detective Team, who is a member of his office's band.
[[/folder]]
[[folder:John Park]]
The team's {{Cloudcuckoolander}}.
--> '''Played by''': [[TheDanza John Park]]
[[/folder]]
[[folder:Wendy]]
--> '''Played by''': [[TheDanza Wen]][[Music/RedVelvet dy]]
The [[TheSmurfettePrinciple only female]] in the team, who left in between Seasons 1 and 2 due to unknown reasons.
[[/folder]]
[[folder:Hani]]
--> '''Played by''': [[TheDanza Ha]][[Music/{{EXID}} ni]]
A woman who applied both to K's detective team and to the Genius Detective Team, she decided to join the latter upon seeing their skills.
[[/folder]]
!Characters introduced in Season 1
[[folder:Episode 1]]
!!Kangbuk
A part-timer at a catering service company and is the prime suspect for M's murder.
--> '''Played by''': Kangnam
* NewJobAsThePlotDemands: He really is juggling ''a lot'' of part-time jobs, from catering service to convenience stores to karaoke rooms.
!!Rena Park
The owner of a dance studio and C's ex-girlfriend.
[[/folder]]
[[folder:Episode 2]]
!!Hong Jonghyun
A mysterious man that the detective team meets as they search for a precious artifact in Jeju Island. Said artifact is actually [[spoiler:a message left to him by his deceased father.]]
--> '''Played by''': [[TheDanza Hong Jonghyun]]
[[/folder]]
[[folder:Episode 3]]
!!Lee Kiwoo
A man who stays in the same hotel as Kwangsoo, and they become the trio of Lee brothers along with his friend, Changmin.
--> '''Played by''': [[TheDanza Lee Kiwoo]]
* {{Frameup}}: [[spoiler:He was the one who elaborately set up Kwangsoo to be the murderer, when it was actually him.]]
!!Lee Changmin
Kiwoo's friend and a vlogger.
--> '''Played by''': [[TheDanza Lee]] [[Music/TwoAM Changmin]]
* RedHerring: [[spoiler:He's set up to be the murderer, but he had nothing to do with it.]]
[[/folder]]
[[folder:Episode 4]]
!!Ji Yoonha
--> '''Played by''': [[TheDanza Ji Yoonha]]
A girl who was found dead at the beginning of the episode. [[spoiler:Turns out that her dad was J, a doctor involved in Project D.]]
!!Yoo Il
One of the members of 5urprise
--> '''Played by''': [[TheDanza Yoo Il]]
!!Seo Kangjoon
--> '''Played by''': [[TheDanza Seo Kangjoon]]
!!Gong Myung
--> '''Played by''': [[TheDanza Gong Myung]]
!!Kang Taeoh
--> '''Played by''': [[TheDanza Kang Taeoh]]
!!Lee Taehwan
--> '''Played by''': [[TheDanza Lee Taehwan]]
[[/folder]]
[[folder:Episode 5]]
!!Park Haejin
The eerie village doctor, who isn't able to leave the island.
--> '''Played by''': [[TheDanza Park Haejin]]
[[/folder]]
[[folder:Episode 7]]
!!Charming
A renowned magician.
--> '''Played by''': Choi Hyunwoo
!!Shin Hyejeong
Charming's assistant [[spoiler:and lover.]]
--> '''Played by''': [[TheDanza Shin]] [[Music/{{AOA}} Hyejeong]]
!!Choi Hyunwoo
Charming's apprentice.
--> '''Played by''': [[TheDanza Choi Hyunwoo]]
!!Jung Hyesung
A famous Korean actress, who is [[spoiler:Charming's lover]].
--> '''Played by''': [[TheDanza Jung Hyesung]]
[[/folder]]
!Characters introduced in Season 2
[[folder:Episode 1]]
!!Im Wonhee
The head of the Seoul Metropolitan Police and an acquaintance of Jaewook. He's [[spoiler:the one who started the whole investigation regarding the Flower Killers, partnering with Stephanie.]]
--> '''Played by''': [[TheDanza Im Wonhee]]
!!Kim Minjae
One of the officers at the Seoul Metropolitan Police. He is later revealed to be the youngest son of a chaebol owner. [[spoiler:and even later on revealed as the copycat Flower Killer]].
--> '''Played by''': [[TheDanza Kim Minjae]]
!!Yoon Jonghoon
One of the investigators at the Seoul Metropolitan Police, who praises the Flower Killer's methods and has a rocky relationship with Stephanie.
--> '''Played by''': [[TheDanza Yoon Jonghoon]]
[[/folder]]
[[folder:Episode 2]]
!!Stephanie Lee
A profiler who was the subject of C's affections due to her frequent visits at the psychiatric hospital for her thesis. She's also the [[spoiler:daughter of the Guiyi village's shaman, who grew up there herself but was able to escape to the city with the help of her friend Hyewon.]]
--> '''Played by''': [[TheDanza Stephanie Lee]]
!!Tae Hangho
The owner of a general store who the detective team runs into frequently, as he seems to be acquainted with many people. He claims to be able to do anything and everything for you, as long as you have 10,000 dollars as payment.
--> '''Played by''': [[TheDanza Tae Hangho]]
!!Lee Yujin
A young artist who taught art at the psychiatric hospital. [[spoiler:He's Ji Yoonha's older brother, and killed C and K, believing them to be responsible for the death of their father.]]
--> '''Played by''': [[TheDanza Lee Yujin]]
[[/folder]]
[[folder:Episode 3]]
!!Yook Sungjae
A cocky applicant at the detective agency, wanting to fill in Kwangsoo's place.
--> '''Played by''': [[TheDanza Yook Sungjae]]
!!Jin Seyeon
A member of a rich family who hires the detectives to retrieve her family treasure, the "Odd Eye".
--> '''Played by''': [[TheDanza Jin Seyeon]]
[[/folder]]
!!Ahn Igwon
[[folder:Episode 5]]
!!Kim Dongjoon
!!Min Sungwook
!!Min Sol
[[/folder]]
[[folder:Episode 6]]
!!Hyewon
!!Hyewon's mother
!!Village Shaman
[[/folder]]
[[folder:Episode 7]]
!!Wang Gyojin
--> '''Played by''': Im [[TheDanza Gyojin]]
The eldest chaebol son, recently released from jail.
!!Wang Jihoon
The second chaebol son.
--> '''Played by''': Kim [[TheDanza Jihoon]]
!!Byun Jungsoo
The fourth wife of the late chairman.
--> '''Played by''': [[TheDanza Byun Jungsoo]]
!!Secretary Lee
The family's butler and secretary. [[spoiler:As well as the late chairman's lover.]]
[[/folder]]
[[folder:The Flower Killer]]
A killer famous for leaving a flower on his victims' bodies, which led the detective team to suspect that he's behind [[spoiler:K's]] murder. But another pattern with his victims is that they all have no blood smeared on them, unlike [[spoiler:K who was found wearing a bloody sweater stabbed with a knife.]]
--> '''Played by''': [[spoiler:[[TheDanza Lee Seunggi]]]]
* ArcVillain: Of Season 2, where all cases that the detectives solve connect to him in some way.
* CharacterTic: The detective team fails to note that the Flower Killer had a habit of [[spoiler:using ellipses in his messages]]. Guess who else does that?
* CollectiveIdentity: [[spoiler:There are two Flower Killers: the original, Lee Seunggi, stopped killing after his "last masterpiece", K, but his avid fan and follower, Kim Minjae, wasn't satisfied with this ending and so tried to replicate the original Flower Killer's methods in order to gain his attention.]]
* EvenEvilHasStandards: The [[spoiler:original]] Flower Killer's motives were not to kill random people but to kill people who did evil to the society.
* MasterPoisoner: It's revealed that his method of killing is through poison, which is why the deaths are typically bloodless.
* NiceHat: He uses one in a magic show. [[spoiler:It's the same one that a certain detective wore...]]
[[/folder]]
[[folder:Yoo Jaesuk]]
A cowardly neighborhood detective who solves his (small) cases with luck, Yoo Jaesuk becomes the humorous leader of K's detective team, though his members are often the ones who save him. He has the DNA of Literature/SherlockHolmes.
--> '''Played by''': [[TheDanza Yoo Jaesuk]]
* AnimalMotifs: His grasshopper motif from Series/RunningMan is often alluded to.
* ButtMonkey: Which led to him developing quite a suspicion for all types of boxes.
* CrackOhMyBack: Loves teasing Jaewook about this, only for he himself to say that he shouldn't be joking around because he'll be at that age soon.
* HeroicSacrifice: [[spoiler:In the last episode of the first season, he is involved in C's trailer's explosion because he wanted to retrieve K's microchip. He survives thanks to finding a secret passageway, but continues FakingTheDead anyway so he could tail the other members without them knowing.]]
* TheLeader: Of the detective team.
* TheLoad: The detective team notes that it's harder to clean up after Jaesuk's, Kwangsoo's, and Jongmin's messes than actually solving the cases.
* MysteriousWatcher: Jaesuk becomes one in between Season 1 and 2, testing if the members weren't suspicious before coming into contact with them again.
* NiceHat: Is always seen wearing one, because it's one of Literature/SherlockHolmes's defining traits.
* NumberTwo: [[spoiler:Becomes one to K in between Season 1 and 2.]]
[[/folder]]
[[folder:Ahn Jaewook]]
A former agent who now works as a private detective, Jaewook is the eldest member of the team and is most prone to nagging. His connections, especially with the police, prove helpful to the team in cases where they need it.
--> '''Played by''': [[TheDanza Ahn Jaewook]]
* CrackOhMyBack: Not just his back, but also his eyesight is picked on by the other members of the team.
* IntergenerationalFriendship: Jaewook and Sehun, who frequently team up with each other to "bridge" their 23-year age gap.
[[/folder]]
[[folder:Kim Jongmin]]
An errand-runner, with his job usually being a loan shark, Jongmin is easily considered TheLoad both in physical and mental activities: though he works well whenever no one is watching him and is exceptionally good at eavesdropping.
--> '''Played by''': [[TheDanza Kim Jongmin]]
* ButtMonkey: Not just the cast members, but the guests too have their fun with teasing Jongmin.
* CrouchingMoronHiddenBadass: Along with Kwangsoo, he is one of the members to whom the others don't have any expectations at all, but he's usually the one who solves problems that Minyoung can't and pays attention to the situations they're stuck in.
* EatingTheEyeCandy: Always gushes over how pretty Minyoung is.
* TheLoad: Everyone teases him as this, especially when they take loads of time to explain to Jongmin what they need to solve in order to move on.
[[/folder]]
[[folder:Lee Kwangsoo]]
Unemployed and frivolous, Kwangsoo, with his Go-Pro antlers, is more of TheLoad than an actual help to the detectives. However, he has a surprising amount of intellect and survival skills, not to mention the endless humor he provides by just being... there. [[spoiler:He later flees from the team after stealing K's microchip.]]
--> '''Played by''': [[TheDanza Lee Kwangsoo]]
* TheAlcoholic: Kwangsoo is revealed to be a ''really'' bad drunk, which bites him in the ass when [[spoiler:he's framed for a murder he can't remember doing because he was too drunk the night before.]]
* AwesomeButImpractical: The Go-Pro cameras attached to Kwangsoo's backpack look cool, but these also get stuck and hit a lot of places. One of his cameras fall off in Season 2, [[spoiler:because he hit the window while escaping K's vacation home while he was escaping.]]
* ButtMonkey
* ChronicBackstabbingDisorder: The other cast members call out Kwangsoo for having this kind of reputation, which he strongly denies even though he's shown it in the course of the series. [[spoiler:He does it again, on a much larger scale, at the start of Season 2.]]
* {{Frameup}}: Believes himself to be a victim of this, as he could not remember [[spoiler:sleeping with and killing the girl in his hotel room. It turns out to be a frame-up.]]
* TheLoad
[[/folder]]
[[folder:Park Minyoung]]
A beautiful and fashionable former flight attendant, Minyoung isn't just the group's [[EatingTheEyeCandy eye candy]], but is also TheAce thanks to her swift deduction skills and expertise in English.
--> '''Played by''': [[TheDanza Park Minyoung]]
* TheAce: To the point that though everyone in the team claims themselves to be the ace, no one questions her actually being ''the'' ace, with the Genius Detectives Team wanting to recruit her to their side.
* ActionGirl
* AwesomenessByAnalysis: Solves most of the cases this way.
* DamselOutOfDistress: Most times, Minyoung and Sejeong are the ones who get themselves out of problems.
* FunWithForeignLanguages: Some cases require a good amount of English proficiency, in which the detective team is thankful for having Minyoung by their side.
* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
* PrettyInMink: Minyoung tends to wear a lot of clothes in this style, to the point that the other lampshade it by saying they're solving cases, not walking on a fashion show.
* TheSmurfettePrinciple: Minyoung is the only female in the team until Sejeong joins in episode 2.
* WomenAreDelicate: Averted with Minyoung and Sejeong, who tackle cases head-on.
[[/folder]]
[[folder:Oh Sehun]]
Called the "dancing sleuth" because of his main job as a choreographer, Sehun is one of the passive members of the team, only brightening up when it comes to women or if something tugs at his competitive side.
--> '''Played by''': [[TheDanza Oh]] [[Music/{{EXO}} Sehun]]
* {{Bishonen}}: The other members comment on his good looks pretty often, but he's yet to use it to his advantage in a case.
* CompetitionFreak: ''Big time''. He uses up all of Kwangsoo's money because he wanted to be the one to get all stuffed Pororos out of the claw machine, and completely solved a Rubik's cube in 5 hours because he was frustrated that he didn't know how to.
* DeclarationOfProtection: To Sejeong, though it seems like Sehun is the one who Sejeong needs to protect.
* IntergenerationalFriendship: Jaewook and Sehun, who frequently team up with each other to "bridge" their 23-year age gap.
* LikeBrotherAndSister: Sehun and Sejeong are called the "Se-Se Duo".
* RedHerring: He's set up as the [[spoiler:mole in the first episode, with all clues pointing to him, but said clues turn out to be applicable to Yeonseok as well.]]
* YouGottaHaveBlueHair: Sehun shows up in orange hair in the first few episodes of Season 2.
[[/folder]]
[[folder:Kim Sejeong]]
A high school student who is a big fan of mystery novels, Sejeong is the youngest member but also one of the brains of the team.
--> '''Played by''': [[TheDanza Kim]] [[Music/{{Gugudan}} Sejeong]]
* ActionGirl
* DamselOutOfDistress: Most times, Minyoung and Sejeong are the ones who get themselves out of problems.
* EatingTheEyeCandy: Apparently, Yook Sungjae is her style.
* GirlsAreReallyScaredOfHorrorMovies: Minyoung and especially Sejeong are the two most courageous members of the team, taking on challenges that the other cast members don't lay their hands on, such as entering suspicious rooms, pressing mysterious buttons, and handling insects and snakes.
* LikeBrotherAndSister: Sehun and Sejeong are called the "Se-Se Duo", and in the course of seasons 1 and 2, Sejeong has transitioned from calling Sehun "[[UsefulNotes/KoreanHonorifics hyung]]" to the more familiar "oppa".
* WomenAreDelicate: Averted with Minyoung and Sejeong, who tackle cases head-on.
[[/folder]]
[[folder:Lee Seunggi]]
Seeking out the detective agency after they opened the slot left by Kwangsoo in Season 2, Seunggi is a detective who wants to expand his career expertise by working in a detective team instead of by himself. [[spoiler:That's what he says, but...]]
--> '''Played by''': [[TheDanza Lee Seunggi]]
* AssassinOutclassin: [[spoiler:Minjae was planning to kill Seunggi after luring him out, but Seunggi turned the tables on him instead.]]
* BigBrotherInstinct: Is usually partnering up with Sehun when solving cases.
* DetectiveMole: [[spoiler:He joins the detective team in looking for the Flower Killer when in reality, he's the guy they're looking for.]]
* NiceHat: His "magician's hat" which he wore in his first appearance.
* SlasherSmile: [[spoiler:When it's revealed that he's the Flower Killer.]]
[[/folder]]
!Project D Team
[[folder:K]]
K, real name Ahn Naesang, is the one who gathered the detectives into one team, choosing to keep a close eye on them as they're subjects for his scrapped experiment, Project D.
--> '''Played by''': [[TheDanza Ahn Naesang]]
[[/folder]]
[[folder:C]]
C, real name Kim Jeongtae, is one of the head researchers involved in Project D. After a falling-out with K, he decides to steal the information for himself so he can use it to advance his personal objectives.
--> '''Played by''': [[TheDanza Kim Jeongtae]]
[[/folder]]
[[folder:Yoo Yeonseok]]
Yeonseok is just an average citizen who was one of the seven men invited to M's party, [[spoiler:until it turns out that he was the one who killed M, and later killed his colleague C, due to reasons circling K's "Project D". It's later revealed that he was one of the first test subjects of said project.]]
--> '''Played by''': [[TheDanza Yoo Yeonseok]]
* DetectiveMole: He is one of the ones who actively look for M's killer, when [[spoiler:he's actually the one who killed M.]]
* EasilyForgiven: Given how Yeonseok tried to [[spoiler:put them in danger or even kill them in the first two episodes, the detective team welcomes him rather warmly upon their reunion.]]
* HeelFaceTurn: [[spoiler:He comes to trust and work with the detective team, becoming its temporary SixthRanger.]]
[[/folder]]
!Genius Detective Team
[[folder:Jung Jaehyung]]
The leader of the Genius Detective Team
--> '''Played by''': [[TheDanza Jung Jaehyung]]
[[/folder]]
[[folder:Lee Juck]]
--> '''Played by''': [[TheDanza Lee Juck]]
[[/folder]]
[[folder:Lee Jangwon]]
--> '''Played by''': [[TheDanza Lee Jangwon]]
A member of his office's band.
[[/folder]]
[[folder:Shin Jaepyung]]
--> '''Played by''': [[TheDanza Shin Jaepyung]]
The mathematics ace of the Genius Detective Team, who is a member of his office's band.
[[/folder]]
[[folder:John Park]]
The team's {{Cloudcuckoolander}}.
--> '''Played by''': [[TheDanza John Park]]
[[/folder]]
[[folder:Wendy]]
--> '''Played by''': [[TheDanza Wen]][[Music/RedVelvet dy]]
The [[TheSmurfettePrinciple only female]] in the team, who left in between Seasons 1 and 2 due to unknown reasons.
[[/folder]]
[[folder:Hani]]
--> '''Played by''': [[TheDanza Ha]][[Music/{{EXID}} ni]]
A woman who applied both to K's detective team and to the Genius Detective Team, she decided to join the latter upon seeing their skills.
[[/folder]]
!Characters introduced in Season 1
[[folder:Episode 1]]
!!Kangbuk
A part-timer at a catering service company and is the prime suspect for M's murder.
--> '''Played by''': Kangnam
* NewJobAsThePlotDemands: He really is juggling ''a lot'' of part-time jobs, from catering service to convenience stores to karaoke rooms.
!!Rena Park
The owner of a dance studio and C's ex-girlfriend.
[[/folder]]
[[folder:Episode 2]]
!!Hong Jonghyun
A mysterious man that the detective team meets as they search for a precious artifact in Jeju Island. Said artifact is actually [[spoiler:a message left to him by his deceased father.]]
--> '''Played by''': [[TheDanza Hong Jonghyun]]
[[/folder]]
[[folder:Episode 3]]
!!Lee Kiwoo
A man who stays in the same hotel as Kwangsoo, and they become the trio of Lee brothers along with his friend, Changmin.
--> '''Played by''': [[TheDanza Lee Kiwoo]]
* {{Frameup}}: [[spoiler:He was the one who elaborately set up Kwangsoo to be the murderer, when it was actually him.]]
!!Lee Changmin
Kiwoo's friend and a vlogger.
--> '''Played by''': [[TheDanza Lee]] [[Music/TwoAM Changmin]]
* RedHerring: [[spoiler:He's set up to be the murderer, but he had nothing to do with it.]]
[[/folder]]
[[folder:Episode 4]]
!!Ji Yoonha
--> '''Played by''': [[TheDanza Ji Yoonha]]
A girl who was found dead at the beginning of the episode. [[spoiler:Turns out that her dad was J, a doctor involved in Project D.]]
!!Yoo Il
One of the members of 5urprise
--> '''Played by''': [[TheDanza Yoo Il]]
!!Seo Kangjoon
--> '''Played by''': [[TheDanza Seo Kangjoon]]
!!Gong Myung
--> '''Played by''': [[TheDanza Gong Myung]]
!!Kang Taeoh
--> '''Played by''': [[TheDanza Kang Taeoh]]
!!Lee Taehwan
--> '''Played by''': [[TheDanza Lee Taehwan]]
[[/folder]]
[[folder:Episode 5]]
!!Park Haejin
The eerie village doctor, who isn't able to leave the island.
--> '''Played by''': [[TheDanza Park Haejin]]
[[/folder]]
[[folder:Episode 7]]
!!Charming
A renowned magician.
--> '''Played by''': Choi Hyunwoo
!!Shin Hyejeong
Charming's assistant [[spoiler:and lover.]]
--> '''Played by''': [[TheDanza Shin]] [[Music/{{AOA}} Hyejeong]]
!!Choi Hyunwoo
Charming's apprentice.
--> '''Played by''': [[TheDanza Choi Hyunwoo]]
!!Jung Hyesung
A famous Korean actress, who is [[spoiler:Charming's lover]].
--> '''Played by''': [[TheDanza Jung Hyesung]]
[[/folder]]
!Characters introduced in Season 2
[[folder:Episode 1]]
!!Im Wonhee
The head of the Seoul Metropolitan Police and an acquaintance of Jaewook. He's [[spoiler:the one who started the whole investigation regarding the Flower Killers, partnering with Stephanie.]]
--> '''Played by''': [[TheDanza Im Wonhee]]
!!Kim Minjae
One of the officers at the Seoul Metropolitan Police. He is later revealed to be the youngest son of a chaebol owner. [[spoiler:and even later on revealed as the copycat Flower Killer]].
--> '''Played by''': [[TheDanza Kim Minjae]]
!!Yoon Jonghoon
One of the investigators at the Seoul Metropolitan Police, who praises the Flower Killer's methods and has a rocky relationship with Stephanie.
--> '''Played by''': [[TheDanza Yoon Jonghoon]]
[[/folder]]
[[folder:Episode 2]]
!!Stephanie Lee
A profiler who was the subject of C's affections due to her frequent visits at the psychiatric hospital for her thesis. She's also the [[spoiler:daughter of the Guiyi village's shaman, who grew up there herself but was able to escape to the city with the help of her friend Hyewon.]]
--> '''Played by''': [[TheDanza Stephanie Lee]]
!!Tae Hangho
The owner of a general store who the detective team runs into frequently, as he seems to be acquainted with many people. He claims to be able to do anything and everything for you, as long as you have 10,000 dollars as payment.
--> '''Played by''': [[TheDanza Tae Hangho]]
!!Lee Yujin
A young artist who taught art at the psychiatric hospital. [[spoiler:He's Ji Yoonha's older brother, and killed C and K, believing them to be responsible for the death of their father.]]
--> '''Played by''': [[TheDanza Lee Yujin]]
[[/folder]]
[[folder:Episode 3]]
!!Yook Sungjae
A cocky applicant at the detective agency, wanting to fill in Kwangsoo's place.
--> '''Played by''': [[TheDanza Yook Sungjae]]
!!Jin Seyeon
A member of a rich family who hires the detectives to retrieve her family treasure, the "Odd Eye".
--> '''Played by''': [[TheDanza Jin Seyeon]]
[[/folder]]
!!Ahn Igwon
[[folder:Episode 5]]
!!Kim Dongjoon
!!Min Sungwook
!!Min Sol
[[/folder]]
[[folder:Episode 6]]
!!Hyewon
!!Hyewon's mother
!!Village Shaman
[[/folder]]
[[folder:Episode 7]]
!!Wang Gyojin
--> '''Played by''': Im [[TheDanza Gyojin]]
The eldest chaebol son, recently released from jail.
!!Wang Jihoon
The second chaebol son.
--> '''Played by''': Kim [[TheDanza Jihoon]]
!!Byun Jungsoo
The fourth wife of the late chairman.
--> '''Played by''': [[TheDanza Byun Jungsoo]]
!!Secretary Lee
The family's butler and secretary. [[spoiler:As well as the late chairman's lover.]]
[[/folder]]
[[folder:The Flower Killer]]
A killer famous for leaving a flower on his victims' bodies, which led the detective team to suspect that he's behind [[spoiler:K's]] murder. But another pattern with his victims is that they all have no blood smeared on them, unlike [[spoiler:K who was found wearing a bloody sweater stabbed with a knife.]]
--> '''Played by''': [[spoiler:[[TheDanza Lee Seunggi]]]]
* ArcVillain: Of Season 2, where all cases that the detectives solve connect to him in some way.
* CharacterTic: The detective team fails to note that the Flower Killer had a habit of [[spoiler:using ellipses in his messages]]. Guess who else does that?
* CollectiveIdentity: [[spoiler:There are two Flower Killers: the original, Lee Seunggi, stopped killing after his "last masterpiece", K, but his avid fan and follower, Kim Minjae, wasn't satisfied with this ending and so tried to replicate the original Flower Killer's methods in order to gain his attention.]]
* EvenEvilHasStandards: The [[spoiler:original]] Flower Killer's motives were not to kill random people but to kill people who did evil to the society.
* MasterPoisoner: It's revealed that his method of killing is through poison, which is why the deaths are typically bloodless.
* NiceHat: He uses one in a magic show. [[spoiler:It's the same one that a certain detective wore...]]
[[/folder]]
