History Characters / HaiyoreNyarkoSan

[[redirect:LightNovel/NyarukoCrawlingWithLove]]

[[redirect:NyarukoCrawlingWithLove]]

These are the characters of ''LightNovel/NyarukoCrawlingWithLove'' that crawl up to us with a smile!
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[[foldercontrol]]

[[folder:Nyarko]]
[[quoteright:243:https://static.tvtropes.org/pmwiki/pub/images/nyaruko_haiyore.jpg]]
->'''Voiced by:''' Creator/KanaAsumi

An energetic silver-haired girl who happens to be an anthropomorphized form of the Crawling Chaos, Nyarlathotep.
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* TheAce: She is beautiful, athletic, intelligent, makes friends easily, is a good cook, her family's golden child, and a famous and respected space cop. If not for her flaws (namely her clinginess, playful fibbing and inability to operate at a level below "Overdrive") being so blatant, she would easily fall into Mary You-Know-Who territory.
* ActionGirl
* AdaptationalHeroism: Nyarko may be [[ComedicSociopathy a bitch]], but compared to the Franchise/CthulhuMythos' [[SatanicArchetype Nyarlathotep]] she is a saint. While the original Nyarlathotep was a malicious {{Troll}}, she is more like a ManicPixieDreamGirl with {{Troll}} tendencies toned down: she drives Mahiro up the wall by being so goofy and telling BlatantLies (like claiming he got her pregnant), but rather than malice she does it because she has a hard time expressing her feelings for him any other way.
* AllWomenAreLustful
* AnguishedDeclarationOfLove: Declares her love for him while crying her heart out after seeing him and Cuuko being too close to each other, which causes her insecurities about his true feelings for her.
* AxCrazy
* BadassAdorable: Look at that shining smile and those huge emerald eyes. Look at her cutting a nightgaunt in half with a crowbar.
* BerserkButton: Picking a fight with her is never a good idea; hurting Mahiro, however, invites a far worse response from her.
* {{BFS}}: In the last episode of the TV series, she turns her crowbar into one using ThePowerOfLove (which Mahiro immediately denies).
* BodyguardCrush: Literally begged her superiors for the mission to protect Mahiro after seeing his picture.
* BullyHunter: In ''Nyaruani'', when asked as to why she is in love with Nyarko, Cuuko claims the latter once beat up her bullies from way back in space kindergarten. [[SubvertedTrope Subverted]] later when Nyarko admits that [[ShaggyDogStory she beat up anyone she found playing make-believe, even Cuuko]].
** Played more literally later in the novels, where we learn that she and Cuuko would beat up their space elementary school classmate Nyogta for his bullying Hasta. [[spoiler:Which causes a grown-up and bitter Nyogta to erase the girls from existence.]]
* CasualKink: Very open about her perversion, which turns Mahiro off.
* CatchPhrase: "I'm the Crawling Chaos who's always creeping up on you[=/=]Mahiro-san with a smile!"
* ChainsawGood: Yes, even a chainsaw is considered Space CQC.
* ChaosIsEvil: Played with. Like her namesake, Nyarko refers to herself as "The Crawling Chaos", but she isn't outright evil. However, she does annoy Mahiro, shows no mercy to her enemies, and has no qualms bending the rules to suit her needs.
* ChekhovsSkill: The "battle" with Agent Smith turns the [[Series/KamenRiderDouble "Cyclone!" JOKER!!"]] OverlyLongGag into one of these, as Nyarko's ability to create Joker cards lets her easily beat Smith. [[Series/KamenRiderBlade Eternal trump card]] indeed...
* CleavageWindow: Her Planetary Defense Organization uniform (seen in Nyar-O's flashback in episode 3) sports one.
* ClingyJealousGirl: She will never let anyone take Mahiro away from her.
* ColorFailure: Only second to Mahiro in frequency.
* CombatPragmatist: In every possible way. In the first episode she knees a Nightgaunt [[GroinAttack between the legs]] and then proceeded to bash the thing's head in with a rock.
* CoolSword: Her official list of powers include "a mechanical sword capable of cleaving dimensions"...better known as Series/KamenRiderOOO[='s=] Medajalibur. In the anime she only uses it in ''Nyarko-San W'' episode 9, as part of a mass of references to ''OOO''.
* CrowbarCombatant: Her WeaponOfChoice.
* CryCute: Usually PlayedForLaughs as a RunningGag every time Mahiro gives her either the snark, the cold shoulder or the fork. Then PlayedForDrama in Episode 6 of ''W'', when she, unable to endure the sight of Mahiro and Cuuko acting like lovers, breaks down crying while confessing her love to Mahiro.
* TheCuckoolanderWasRight: Happens pretty often, much to Mahiro's annoyance. A specific example is her suggesting that Mahiro is descended from a famous deity hunter based off of his {{Tsundere}} attitude and [[ImprobableWeaponUser skill with forks]]; Mahiro dismisses it as nonsense, but then his mother comes home and we learn that Nyarko was spot-on.
** Also happens with her attempts to pick out the ChekhovsGun that will be critical to the current case; again, Mahiro will dismiss her suggestions because they would lead to a stupid resolution, but her guesses have been right more often than his thus far.
*** During the FreakyFridayFlip plot, Nyarko even laughed ''with'' Mahiro at her own suggestion that [[spoiler:the time-travelling rebel had stolen Yoichi's body]], saying it would be way too convenient. So of course, it turns out she was right.
* CuteAndPsycho: She's cute and bubbly and downright ''vicious'' in combat. She's ''[[UpToEleven even worse]]'' when she becomes a MagicalGirl, where she sets Nightgaunts on fire and makes them puke blood while going on about "purifying naughty childrens' souls".
* CuteBruiser: Her fighting style isn't exactly sophisticated, utilizing fists, kicks or some blunt instrument.
* CuteLittleFangs
* DarkIsNotEvil
* ADateWithRosiePalms: [[spoiler:[[LovableSexManiac Obviously her first order of the day]] [[FreakyFridayFlip after being stuck in Mahiro's body]]]].
* DisneyDeath: [[spoiler:In Episode 10. She's actually fine -- [[ChekhovsBoomerang the black crystal she gave to Mahiro back in Episode 2]] saw to that]].
* EvenTheGirlsWantHer: Just ask Cuuko.
* EveryoneHasStandards: She may be a LovableSexManiac, but even Ato-ko creeps her out.
-->'''Mahiro:''' Nyarko, [[WouldHitAGirl can I punch her?]]\\
'''Nyarko:''' Please do.
* ExpressiveHair: Nyarko's [[IdiotHair cowlick]] can even form letters.
* GenkiGirl: And probably ''the most energetic'' Nyarlathotep ever.
* GirlWithPsychoWeapon
* GoneHorriblyWrong: Mahiro has her become a MagicalGirl in the hopes that it'll mellow her out; it seems to work for approximately ten seconds, then she runs off to fight some Nightgaunts and acts outright AxeCrazy, as opposed to her usual CuteAndPsycho merciless fighting style.
* GratuitousForeignLanguage: Primarily English. Also, Italian.
* HenshinHero: With blatant nods to ''Franchise/KamenRider'', the TropeNamer franchise.
* HeroicBSOD: Has a brief one when Mahiro and Cuuko have to pretend to be lovers, and he tells her to go home if she doesn't want to see them like that.
** And again in the last episode of ''Nyarko-san W'' when ordered to leave Earth, but it really kicks off after Mahiro sadly says "I can't do anything to stop it". She spends the next half of the episode with HiddenEyes and utterly silent, literally having to be dragged along by the hand by Mahiro.
* HeroicComedicSociopath: Mahiro's reaction to most of her methods is to wonder if she is NotSoDifferent from her enemies, and she's prone to lots of NominalHero moments.
* HolyHandGrenade: Nyarko uses ''blasphemous'' hand grenades. Yes, actual hand grenades (with little pink ribbons around them).
* HumanoidAbomination: She claims that it's her true form, but might have just been screwing with Mahiro's head; so far we've only ever seen her as a human girl and a HenshinHero. We have seen her brother take on an Eldritch form, though, so it stands to reason she can do much the same.
* HypocriticalHumor: Cuuko is a clingy unwanted love interest to Nyarko...just like Nyarko's a clingy, unwanted love interest to Mahiro. Often Nyarko will even direct insults against Cuuko that she heard from Mahiro not minutes earlier.
* IdiotHair: ''Prehensile'' idiot hair.
* IHaveManyNames: A search for her name in a library database brings up so many alternate names the system crashes.
* IncomingHam: Whether it's imitating another LargeHam ("[[Series/KamenRiderDenO Watashi, SANJOU!]]") or introducing herself with the OpeningNarration from ''[[{{Anime/Braiger}} Galaxy Cyclone Braiger]]'', you know '''exactly''' what to expect when Nyarlathotep walks into the room.
* InSeriesNickname: A double example, with "Nyarko" being short for "Nyarlathotep", and ''that'' name being what people call her because her real name is TheUnpronouncable.
* InvoluntaryShapeshifting: The light novels explicitly state that she has the power to transform others into weapons or vehicles, a ShoutOut to Series/KamenRiderDecade's Final Form Ride; she uses this in the anime to turn Shantak-kun into a CoolBike, and [[spoiler:Hasta into his SuperMode]].
* LargeHam
* LetsGetDangerous: While she acts like a buffoon most of the time, when things get serious, she can really kick some ass.
* LovableSexManiac: Much to Mahiro's chagrin, OnceAnEpisode she's either trying to bed him or at least talking about it very loudly.
* LoveBeforeFirstSight: She was smitten with Mahiro with just looking at his photo.
* LustObject:
** She wants to be this for Mahiro, but her sexual advances only turn him off.
** Cuuko wants to get banged by Nyaruko ''badly''. Cuuko doesn't even care if [[FreakyFridayFlip there's another person inside Nyaruko's body]], she only wants to get her hands on it.
* MadLove: Her very clingy and stalker-y tendencies as well as her very forceful advances make her a nuisance to Mahiro more than anything and he keeps telling her to just leave him alone. He ''does'' like her deep down, but still finds her way too annoying for his tastes.
* MagicalGirl: Becomes one in "How to Defeat a Kind Enemy" at Mahiro's insistence in the hopes that it'll make her less hyper and violent. [[GoneHorriblyWrong It completely backfires]].
** Even as a Magical Girl, she references ''Series/KamenRiderKuuga'' and ''Anime/{{Dancougar}}''; you can take the tiger out of the jungle, but you cannot take the jungle out of the tiger.
* MagicalGirlfriend: She's the alien anthropomorphized form of Nyarlathotep the Crawling Chaos who is sent to Earth to protect Mahiro and falls completely in love with him. Her arrival is just the beginning of the new craziness in Mahiro's life.
* {{Malaproper}}: Happens as a result of her use of GratuitousEnglish; the most famous example is confusing "hate" and "(land)mine", because they're homophones in Japanese (''kirai'').
* ManicPixieDreamGirl: As noted elsewhere, this actually works to her disadvantage, since she's a bit ''too'' manic and clingy for Mahiro's tastes.
* MasterOfTheMixedMessage: Nyarko will gladly, eagerly, tell Mahiro that she loves him. However, in episode 7 of the second TV series, he complains that her wacky, playful nature and near-constant lying makes it so that he isn't sure she even really means it. Nyarko calmly responds that she has trouble saying it ''unless'' she's acting silly, but assures him she's completely honest. She then turns, smiles, and simply says "Mahiro, I love you."
* {{Meido}}: Her [[http://safebooru.org/index.php?page=post&s=view&id=612797 "default" outfit]] is actually a maid outfit; it's just less obvious because of the black apron and checkerboard-patterned bow and skirt.
* MoeAnthropomorphism: Of Nyarlathotep, the Crawling Chaos.
* MoeStare: Her default expression whenever either Mahiro or some interesting Earth entertainment media is present.
* MomentKiller: To her own romantic moments with Mahiro -- just when he is ready to finally admit he loves Nyarko, she ends up unwittingly driving him off again by topping her previous horny behavior.
* MotorMouth: Nyarko will talk non-stop. About anything you haven't asked her about, of course.
* MysticalWhiteHair
* NoSenseOfPersonalSpace: In addition to constantly clinging to Mahiro like a barnacle, she repeatedly tries to jump him in the bathtub or the bedroom and "play Adam and Eve".
* NotCheatingUnlessYouGetCaught: When asked by Mahiro about whether she can bring home all the manga, anime and games she bought at Akihabara, and whether this makes her NotSoDifferent from the smugglers she's supposed to apprehend, her reply is...
-->'''Nyarko:''' "It's not a crime if no one finds out."
-->(Cue Mahiro [[{{Blackmail}} showing her a video saying that exact line]] [[CrazyPrepared on his camera]])
* ObliviousToHerOwnDescription: When the Banshin starts obsessing over Mahiro and doing HenshinHero poses, Nyarko thinks it's short-circuiting. She doesn't realize that it's acting exactly like her until Mahiro outright tells her as much...[[HypocriticalHumor at which point she thinks it's awesome]].
* OdangoHair: When swimming.
* OnlyKnownByTheirNickname: When she introduces herself to Mahiro, she says "They call me Nyarlathotep, but I actually have a real name"; later novels reveal that her name is [[TheUnpronouncable unpronouncable by human tongues]], and just being able to ''comprehend'' it is a feat in and of itself, one that apparently helps you understand her better and makes you emotionally closer to her.
* OppositesAttract: With Mahiro.
* PopCulturedBadass: Nyarko will beat the snot out of you while doing Series/KamenRider poses, quoting [[Manga/JoJosBizarreAdventure Jotaro Kujo]], using [[Manga/RanmaOneHalf Ranma Saotome]]'s tactics, and much, '''[[ReferenceOverdosed MUCH]]''' more.
* RapunzelHair
* RedAndBlackAndEvilAllOver: The color scheme of her Full Force Armor, though she's not really evil... just violent and perverted.
* RetGone: [[spoiler:She and Cuuko get written out of existence by their old classmate Nyogta, but get restored by Mahiro and Yithka.]]
* RichIdiotWithNoDayJob: Subverted; after she defeats Nodens, Nyarko takes '''300 years' worth''' of paid leave in order to be with Mahiro. Soon thereafter her brother kills the gods of the Dreamlands and she receives an official reason to be on Earth, but even then the job is mostly hands-off.
* RocketPunch: In episode 11 of ''Nyarko-San W'', she executes Series/KamenRiderFourze's Rider Rocket Punch on Cuuko; the light novels outright state that she has the power to manifest "an orange rocket-like propulsion unit" on her right arm.
* RuleOfCool: The light novels demonstrate that she can change into her Full Force Form with nothing but a thought; she just chooses to do Series/KamenRider poses and say [[ByThePowerOfGrayskull "Henshin!"]] because she's a fangirl and thinks it's awesome.
* SavvyGuyEnergeticGirl: Energetic Girl to Mahiro's Savvy Guy.
* SayMyName: "Maaahiro-san~!" So much that it's practically a CatchPhrase in and of itself.
* SelfProclaimedLoveInterest: She claims to be Mahiro's wife, to his chagrin.
* ShamelessFanserviceGirl: She tries to show off her naked body to Mahiro more than once, [[PleasePutSomeClothesOn only for him to tell her to put her clothes on]].
* SingleTargetSexuality: Has made it very clear that she considers Mahiro Yasaka her ultimate, eternal, one-and-only love and that nobody else in the universe could ever hold a candle to him.
* SmittenTeenageGirl
* SpaceX: She refers to her fighting style as Space [=CQC=].
* SpeaksFluentAnimal: She can understand what Shantak-kun is saying without the need for a translator like Kuuko.
* SpellMyNameWithAnS: Her name is obviously supposed to be Nyarlathotep plus the Japanese suffix -ko, which is used to "feminize" a name (such as Kyo -> Kyoko). This means that Nyarko, Nyaruko, and Nyarlko are all perfectly valid spellings.
* StalkerWithACrush
* SuperMode: Her "Full Force Form", which she first used to beat Cuuko after losing to her initially due to the latter's power boost in her own pocket dimension.
* SuperSpeed: The light novels list [[Series/KamenRiderKabuto Clock Up]] as one of her special powers; so far it's only been referenced for the sake of a gag.
* SweetTooth: Thoroughly exploited by Cuuko.
* TeenGenius: Goes back since [[ChildProdigy childhood]], much to her older brother [[BookDumb Nyar-o's]] ire.
* ThatLiarLies: No, she does not carry Mahiro's child. Doesn't stop the rest of the cast from believing her, though.
* TrouserSpace: Nyarko keeps a chainsaw in her skirt. You read right. Her magical girl form keeps her trademark crowbar there.
* NamesToRunAwayFrom/UnpronouncableNames: Nyarko's real name is apparently extremely difficult for humans to pronounce; just comprehending it is said to [[{{Foreshadowing}} strengthen the relationship between a man and a woman]].
* UnsympatheticComedyProtagonist
* VictoriasSecretCompartment: She keeps a full-size [[{{Anime/Pokemon}} Pokeb-]][[LawyerFriendlyCameo I mean, Monster Capsule]] inside her blouse, as well as her candid pictures of Mahiro.
* ViolentlyProtectiveGirlfriend: As Cuuko found out the hard way when she stated that she was going to toast Mahiro.
* VoluntaryShapeShifter: According to the LightNovel, all Nyarlathotepians can shift their facial features at will; Nyarko uses this to prove she's an alien by making herself look like an {{expy}} of [[Franchise/LyricalNanoha Nanoha]]. Additionally, she can change into her Full Force Form with just a thought.
* WhiteHairBlackHeart: Less evil, more "perverted".
* WingdingEyes: Gets visible stars in her eyes when visiting Akihabara.
* ZettaiRyouiki: She wears white thigh-high socks when in school uniform.
[[/folder]]

[[folder:Mahiro Yasaka]]
[[quoteright:262:https://static.tvtropes.org/pmwiki/pub/images/yasaka_mahiro.jpg]]
->'''Voiced by:''' Creator/EriKitamura

A 17-year-old high school boy with a fascination for the ''Franchise/CthulhuMythos''.
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* ActionSurvivor: He's been in close contact with the denizens of the Franchise/CthulhuMythos... and he's still ''not'' insane.
* AdaptationDyeJob: Has black hair in the light novels, which gained a dark brown tint in the anime. On a similar note, his eyes went from brown in the novels to grey in the anime.
* AscendedFanboy: Though in this case it's an extremely mixed blessing.
* AwLookTheyReallyDoLoveEachOther:
** When Ato-ko shows up in the novels, she puts Mahiro in a fantasy sequence to determine who he really loves -- and we get an ImagineSpot of him and Nyarko getting married.
** Likewise, when Nyarko confesses her feelings in front of her parents, Mahiro simply [[LuminescentBlush turns bright red]] instead of getting freaked out like usual.
* BadassNormal: On the [[NonActionGuy rare occasion that he gets to fight]], he holds his own among cosmic horrors with nothing but a fork.
* BewareTheNiceOnes: He may seem to be a hapless boy, but push him too far -- especially [[BerserkButton make fun of the]] Franchise/CthulhuMythos -- and he will stab you with a fork... whether you're human, animal or Lovecraftian.
* BerserkButton: Never ''ever'' malign the Franchise/CthulhuMythos.
* {{Bishonen}}: Handsome enough to have smitten Nyarko just with his photo, get "scouted" for a role in an alien [[YaoiGenre boys' love]] show (he was not pleased with this), and get confessed to by Hasta. At one point the girls tell him that he's strangely attractive to aliens.
* BrutalHonesty: Tends to be very direct with his thoughts about all the Lovecraftian insanity around him. In one case, he even made Nyarko lose almost all her SAN Points by directly telling her that he doesn't like her.
* CanNotSpitItOut: In episode 5 of ''Nyarko-san W'', he mutters to himself that he would probably be more interested in Nyarko if she was not so manic; he actually says this ''in'' Nyarko's presence, but refuses to repeat himself when she says "What did you say?".
* CantActPervertedTowardALoveInterest: [[spoiler:In the wake of [[FreakyFridayFlip his body-swap with Nyarko]] he cannot even find the courage to look at the latter's naked body while taking a bath.]]
* CantStandThemCantLiveWithoutThem: Mahiro constantly says how annoying his alien housemates are and stabs them with forks when they take their antics too far. When he's left completely alone in an alternate dimension, he starts missing them and realizes he does think it's fun to have them around.
* CatchPhrase: He has a couple: "[[{{Anime/Doraemon}} Wait, that makes no sense]]"[[note]]Literally "No, that logic is faulty."[[/note]], "That was another stupid ending" and "Keep it to three lines"[[note]]Used in anticipation of ExpoSpeak; it's basically the Japanese equivalent of "TL;DR"[[/note]]
* ColorFailure: The poor boy is prone to this, be it for failed SAN Meter checks or having his mom returning without warning.
* CrazyPrepared: Be it forks to fend Nyarko off or a cellphone with camera with which he can {{blackmail}} her into doing her job properly. He takes this to another level in Episode 7 of Season 1, where he's got enough forks to pin Nyarko to a table for the whole night after she tried to make their "love take form".
* CrossdressingVoices: Creator/EriKitamura is more used to younger girls and kids, not a boy in his mid-teens like him.
** Averted (kind of) during [[spoiler:Mahiro and Nyarko's FreakyFridayFlip and Kitamura gets to "play" Nyarko.]]
* CryCute: A male example [[spoiler:(albeit in Nyarko's body) when he thought Nyarko (in his own body) died [[TakingTheBullet shielding him from the Star Child Guardian]], admitting that he should've been far nicer to her. Of course, that was Nyarko's setup to give him a ''really deep'' French kiss.]]
* DidYouJustPunchOutCthulhu: He subdues Nyarlathotep with forks roughly OnceAnEpisode.
* DidYouJustRomanceCthulhu: He got Nyarlathotep to fall for him; he might consider it unfortunate (for now), but some fans tend to think he's an idiot for being less-than-receptive to the hot silver-haired geek girl who totally wants to play Adam and Eve.
* DisappearedDad: His father's alive and well, but he has yet to appear in either the novels or the anime. It's implied that he's stuck at work almost constantly to make up for all the honeymoons he goes on with Yoriko.
* DomesticAbuse: His physical violence on Nyarko and Cuuko are treated as [[PlayedForLaughs comedy]].
* EmpoweredBadassNormal: The novels later reveal an ability to perceive fluctuations in spacetime and a much higher than normal resistance to YouCannotGraspTheTrueForm. Together with the curious appeal he has to the series various aliens that first kicked off the series, it hints he might not be entirely normal after all, especially given his parent's established connections to the eldritch world...
* EvenTheGuysWantHim: Just ask Hasta.
* FriendToAllChildren: His interactions with Guthatan, Hasta, and the [[HumanityEnsues human-ized]] Shanta-kun show that he's quite fond of kids. He's even admitted to viewing Hasta as the little brother he never had.
* GenerationXerox: He inherited his fork-wielding skills from his mother Yoriko.
* GratuitousEnglish: Courtesy of episode nine's introduction. CLOSE. YOUR. EYES.
* ImprobableAimingSkills: In episode 9 of ''Nyarko-San W'', he hits a triple 300 on a dartboard...again, with forks.
* ImprobableWeaponUser: When he has to, he fights with his trusty... ''fork''.
* KidWithTheLeash: He does his best to keep Nyarko's, Cuuko's, and, sometimes, Hasta's antics under control.
* LuminescentBlush:
** Mahiro gets one after [[PantyShot seeing Nyarko's panties]], and also when he takes one of her advances seriously -- sometimes PlayedForLaughs.
** At the very start of the story, he gets one at the idea of having a pretty girl like Nyarko being around him day and night; when she notices and calls him cute, out comes the fork.
** In the novels, he gets one during his first meeting with Nyarko's parents when she she tells them that she's in love with him.
* LustObject: When Nyaruko isn't trying to get in bed with Mahiro, she's imagining it or talking about it. This is why Mahiro doubts whether she sincerely loves him or is only trying to toy with him.
* MegatonPunch: He punched Nyarko so hard that she was sent flying high in the sky, in episode 5 of season one.
* MrFanservice: InUniverse, he's a sexual god as far as the Lovecraftian deities are concerned.
* NiceGuy: He is legitimately a good, caring persion; he just has a short temper when it comes to Nyarko and co.'s madcap antics.
* NoGuyWantsToBeChased: He finds Nyaruko way too clingy for his taste and her LovableSexManiac antics put him off even more. He feels the most attracted to her when she calms down and isn't trying to force her way into bed with him. Too bad Nyaruko doesn't get this and her friend Tamao just encourages her to be ''more'' aggressive whenever she wonders if she's pursuing Mahiro the right way.
* NonActionGuy: Not that he cannot hold himself in a fight, but when he has {{Eldritch Abomination}}s chasing after him, he would be powerless without Nyarko, Cuuko and Hasta rushing into his defense.
* NotSoAboveItAll: In episode 3 of ''Nyarko-San W'', it turns out that ''he'' was the one carrying the mystical book that the villains wanted; he has a BigNo and Nyarko complains about how mean and hypocritical it was for him to try and pin this one on her. He defends himself by saying that that's usually how it works, only for Cuuko to call him out for making excuses.
* OnlySaneMan: The only normal, reasonable person in a show full of weird and perverted aliens.
* OppositesAttract: With Nyarko.
* OrdinaryHighSchoolStudent
* PeekABangs: Has the shy version in almost all the light novel artwork by Koin.
* RippleEffectProofMemory: He has the extremely rare ability to perceive and resist shifts in the space-time continuum; this gets brought up in the first novel when dealing with Nodens and Cuuko, but becomes a ChekhovsSkill later when [[spoiler:Nyarko and Cuuko get written out of existence and Mahiro is the only one who can save them.]] Considering the series' love of ''Series/KamenRider'', this may well be a ShoutOut to the concept of Singularity Points from ''[[Series/KamenRiderDenO Den-O]]''.
* SavvyGuyEnergeticGirl: Savvy Guy to Nyarko's Energetic Girl.
* SoBeautifulItsACurse: To the viewers, he looks like an ordinary but still cute anime boy; to the aliens of the Franchise/CthulhuMythos, he's apparently sex on legs, which means he's been scouted for a BoysLove TV show, had a {{Yaoi}} {{Doujin}} written about him, and [[UnwantedHarem keeps having aliens fall in love with him]].
* StraightMan: His main role in the show's comedy is to react to the absurdity going on and put up with his housemates' crazy antics.
* {{Tsundere}}: A male Sweet Type -- he's a genuinely nice and friendly guy by default, but has little to no patience with Nyarko and co.'s madcap antics. These tendencies are more prominent with Nyarko; he claims to hate Nyarko's open affection, but no matter how often he brings out the fork, he obviously finds her cute. [[spoiler:His deredere comes out when he, in Nyarko's body, realized how willing she is to protect him even with so lithe a body, deciding that he should start being nice to her.]]
** At the end of the first novel[=/=]episode 2 of the TV series, when Nyarko is saying goodbye and Mahiro says that he's going to miss her, she gushes "There's the dere!"
* UnfazedEveryman: After a while, even Nyarue's true form doesn't really trouble him. In episode 2 of the second series, Nyarko even remarks that his tolerance for this sort of thing is pretty impressive.
* UnwantedHarem: Nyaruko is crazy for him, Cuuko eventually wants to have him and Nyaruko, Hasta wants to have his baby and Tamao has a little crush on him. Even Nyaruko's pet Shantak-kun loves him!
* VisibleSilence
* WeirdnessMagnet: Nyarlathotep the Crawling Chaos appearing in his life and [[DidYouJustRomanceCthulhu declaring her undying love for him]] is just the ''start'' of his troubles, which includes dealings with time-traveling MoralGuardians, alien {{Animal Wrongs Group}}s, and [[ArsonMurderAndJaywalking being kidnapped so he can be auctioned off as the star of a]] BoysLove TV show. {{Lampshaded}} in one episode where Nyarko remarks that something about Mahiro makes him "strangely attractive" to aliens.
* WeWantOurJerkBack: In "How to Defeat a Kind Enemy", he makes Nyarko become a MagicalGirl because he hopes it'll mellow her out; when this turns her outright AxeCrazy, he admits that she was better the way she was.
* WouldHitAGirl: With Nyarko around, it's either hit or [[ClingyJealousGirl get hit on]]. He usually chooses the former. He has also hit Cuuko as well, although not nearly as much as Nyarko.
* WrongGenreSavvy:
** Mahiro has claimed to be Player Character in ''TabletopGame/CallOfCthulhu'', which makes him afraid Nyarko will turn out to be just like the Lovecraftian Nyarlathotep. If he realized he was in a LovecraftLite RomCom and that Nyarko actually ''is'' in love with him, he would probably be a lot happier. She is driving him insane, just not in the way he's thinking.
** Mahiro has also attempted to spot the {{Foreshadowing}} in advance, mostly by asking "What would make for the dumbest resolution?" So far he's only been right once (in episode 9 if ''Nyarko-San W''); the rest of the time he's wrong because something comes out of nowhere and results in an ending even dumber than he anticipated.
[[/folder]]

[[folder:Cuuko]]
[[quoteright:259:https://static.tvtropes.org/pmwiki/pub/images/kuuko_haiyore.jpg]]
->'''Voiced by:''' Creator/MiyuMatsuki

Nyarko's old friend/lover/enemy who also comes down to Earth and the humanized version of Cthugha, the Burning One.
----
* AbhorrentAdmirer: How Nyarko sees her.
* ActionGirl
* AmbiguouslyBi: She is madly in love with Nyarko but she also develop some feelings for Mahiro. Look on the SingleWomanSeeksGoodMan below.
* AttackDrones: Which look like a [[ShoutOut fusion]] of the [[Anime/MobileSuitGundam Elmeth]] and [[Anime/MobileSuitGundamCharsCounterattack Sazabi's]] respective attack drones.
* BadassAdorable: Watch her resort to adorably crazy ways to win Nyarko's heart one minute, then watch her incinerate nightgaunts, ghouls and Deep Ones the next.
* BullyHunter: Back in space elementary school, she and Nyarko would rough up their classmate Nyogta for bullying Hasta; [[spoiler:years later, he tries to get revenge by rewriting them out of history.]]
* ChildhoodFriendRomance: She has known Nyaruko since space elementary school and isn't shy to express her wish to marry her.
* ChildhoodFriends: She was classmates with Nyaruko and Hasta at space elementary school.
* ChildhoodMarriagePromise: Her cousin Cuune claims one...except that it consists entirely of a tape recording of a young Cuune coaching an even younger Cuuko to say things like "I want to marry cousin Cuune when I grow up". [[InsaneTrollLogic Nobody questions how this is a valid marriage contract.]]
* ClingyJealousGirl: She will ''never'' let Mahiro have Nyaruko all to himself. Luckily for her, Mahiro is more than happy to cooperate with her to get Nyaruko off him. She still [[BurningWithAnger burns with anger]] whenever she thinks he made a pass at Nyaruko (although it's always Nyaruko at fault). Later on, Cuuko makes it clear she wants to have both Nyaruko and Mahiro, but doesn't like to see them close to each other without her permission.
* CreepyMonotone: Talks in a low, slow monotone, except when she talks to or about Nyarko.
* CryCute: The memory of Xoth-731 is the only thing that can break her stoic facade and make her cry, compounded by the fact that it was ''she'' who had to destroy the entire console after it went rogue. Also PlayedForLaughs when she loses to Nyarko in card games and when Mahiro punishes her when she gets out of hand.
--> "[[SayingSoundEffectsOutLoud Sniffle.]]"
* CurtainsMatchTheWindow: Sports [[FieryRedhead red hair]] and [[RedEyesTakeWarning matching eyes]].
* DeadpanSnarker: Except where Nyarko is concerned, at which time she enters fangirl mode.
* DefrostingIceQueen: Initially cold and indifferent to anyone other than Nyaruko, she becomes way friendlier to Mahiro as the series goes on. This culminates in Cuuko deciding she's fine to have both Nyaruko and Mahiro.
* DudeShesLikeInAComa: Technically only [[HeroicBSOD a rejection-induced]] [[ColorFailure shock]], but she still has no qualms whatsoever about undressing Nyarko.
* ElementalHair
* FieryRedhead: Literally -- her human form uses flames as ribbons for her twintails.
* FullFrontalAssault: Her Cross Fire Sequence form can be seen as a BarbieDollAnatomy version of this trope, as her "clothing" during it is either really good body paint or markings on her body.
* GamerChick: One reason she quickly became friends with Yoriko.
* GirlishPigtails: Two really long ones.
* GuiltyPleasure: {{Toku}}, apparently; in "How to Defeat a Kind Enemy", she's watching ''Iron Striver'' as intently as Nyarko and refers to it as "predictable yet enthralling".
* HaremSeeker: After warming (pun not intended) to Mahiro, her plan changes from "marry Nyarko" to "I bear Nyarko's child, [[MisterSeahorse the boy bears mine]]". When he questions it, she responds by saying [[ComicallyMissingThePoint "My party system supports up to four characters."]]
* HeyYou: Tends to call Mahiro "[[Series/KamenRiderHibiki Boy]]".
* HopelessSuitor: She's obsessed with Nyaruko, but Nyaruko doesn't have the slightest interest in anyone who isn't [[SingleTargetSexuality Mahiro]].
* HumanoidAbomination: ''A living fireball'' disguised as a red-haired girl.
* IAmNotLeftHanded: In her first fight against Nyarko, she reveals that she's able to use more AttackDrones than when last they met.
* TheImmodestOrgasm: Creator/MiyuMatsuki does an exceptionally loud, erotic cry in Episode 5 of ''W'' when Cuuko is being felt up by Cuune.
* IncompatibleOrientation: To Nyarko, for more than one reason... [[PsychoLesbian not that she cares]].
* InsaneTrollLogic: The girl just runs on this.
* {{Irony}}: She's living fire, and yet is a ''nekojita'' (literally "cat's tongue") -- someone who cannot handle hot or spicy foods.
* IWantMyBelovedToBeHappy: A small version occurs in episode 12 of ''Nyarko-san W''. Cuuko, seeing how [[HeroicBSOD broken up]] Nyarko is after they're ordered to leave Earth, encourages Mahiro to be near Nyarko in the hopes of cheering her up (though Cuuko insists it's just a temporary "loan").
* LaserGuidedKarma: Volume 6 of the light novels introduces her cousin, Cuune. She acts the exact same way Cuuko does towards Nyarko, except she's [[KissingCousins horny for Cuuko]].
* LovableSexManiac: Just as much as Nyaruko, even though the latter won't admit that. Cuuko is ''very'' vocal about wanting to get into Nyaruko's pants and is trying to get her hands on her whenever she can.
* LustObject: To her cousin Cuune. The first thing Cuune does when she sees Cuuko again is to jump at her, grope her all over and ''finger'' her.
* MadLove: To Nyarko, she's nothing but her annoying, psychotic StalkerWithACrush, still Cuuko won't get off her back no matter what she does to keep her away from her and Cuuko is ready to kill anyone who gets Nyarko's attention.
* MatchmakerCrush: Wholeheartedly ships Mahiro/Hasta at first, because it means that [[PairingTheSpares she can have Nyarko for herself.]] Hasta runs with it, to both [[UnwantedHarem Mahiro]] and [[ClingyJealousGirl Nyarko's]] annoyance. This changes once Cuuko falls for Mahiro herself and changes her plan to marry both Nyarko and Mahiro.
* MoeAnthropomorphism: Of Cthugha, the Burning One.
* MurderTheHypotenuse: Briefly attempted this in her first appearance when she got annoyed with Nyarko's attachment to Mahiro, which [[BerserkButton prompted Nyarko]] to pummel her. Nyarko never brings up to Mahiro that Cuuko tried to murder him.
* {{NEET}}: She refers to her time as a "home security guard", a Japanese slang for this trope. Nyarko outright calls her a NEET a few times, as well as a {{Hikkikomori}}.
* NewJobEpisode: Has one in "Remember my Love(craft-sensei)", which she tries out various Earth jobs. None of these last due of her fire powers, was it "overcooking" steak (convenience store cashier) or [[AngstNuke her temper getting the best of her]] (fast food restaurant cashier).
** Or in the case of the last one (gas station attendant), [[OnlySaneMan Mahiro]] outright says "You shouldn't be working here."
* {{Nosebleed}}: In "How to Defeat a Kind Enemy", when [[MagicalGirl Crawling Nyarko]] pulls her crowbar out from [[TrouserSpace her skirt]].
* TheNotLoveInterest: Throughout the first season, Cuuko moves into Mahiro's house and joins Nyaruko's and Hasta's antics like she was another member of his harem. The thing is that Cuuko is after Nyaruko, not Mahiro. It gets {{subverted|trope}} in the second season where Cuuko does develop some feelings for Mahiro. Her main target of affection is still Nyaruko, though.
* NotSoDifferent: She's a clingy and perverted stalker to Nyaruko just like the latter is to Mahiro. Not that Nyaruko will ever admit it.
* OtakuSurrogate: Of the general variety. During her first appearance she references ''Anime/MobileSuitGundam'' and ''Anime/TheBigO'', but this soon expands to video games and anime series, classic and contemporary alike.
* PlayingWithFire: Naturally.
* PluckyGirl: Willing to go to some crazy lengths to get into Nyarko's skirt.
* PsychoLesbian: {{Subverted|Trope}}. Cuuko claimed she was going to kill Mahiro for being Nyaruko's love. She changes her mind after Mahiro makes clear he would like Nyaruko to leave him alone too. From then on, Cuuko's attempts to sabotage his relationship with Nyaruko are limited to [[ShipperWithAnAgenda attempting to pair him off with someone else]].
* PunnyName: Her name sounds like {{Kuudere}}, and she's a pretty classic type 3. She's also undeniably cuckoo.
* RapunzelHair
* RedEyesTakeWarning
* RetGone: [[spoiler:She and Nyarko get written out of existence by their old classmate Nyogta, but get restored by Mahiro and Yithka.]]
* RomanticFakeRealTurn: On her side, at least. In order to discourage Cuune, she has Mahiro [[TheBeard fake a relationship]] with her, but falls for him for real.
* ScrewTheRulesIHaveConnections: Gets an easy pass into the Planetary Defense Force because her uncle happens to be in PR. Nyarko is incensed, since ''she'' had to pass an examination to even make it (as well as [[NoGuyWantsToBeChased a few]] [[PsychoLesbian other]] [[{{Yandere}} reasons]]).
* SelfProclaimedLoveInterest:
** She calls herself Nyaruko's wife even though the latter can't stand her.
** Later on, she calls herself Mahiro's fiancée even though they don't have to keep up the charade without her cousin around.
* ShipperWithAnAgenda: She ships Mahiro with Hasta so she can have Nyarko to herself, although she later [[HaremSeeker changes her plans about Mahiro]].
* SingleWomanSeeksGoodMan: It's Mahiro's kind and helpful personality which makes Cuuko develop feelings for him.
* StalkerShrine: Her room is full of pictures and figures of Nyarko and a body pillow.
* StalkerWithACrush
* SugarAndIcePersonality: Icy, unemotional and monotone at first glance, but maniacally affectionate towards those she becomes obsessed with. At first Mahiro gets the coldest ice, ''only'' Nyarko gets the sugar. The former doesn't mind, so long as they remain on cordial terms. The latter would rather get away from her. Eventually Mahiro also gets the sugar, depending on the moment he can find it annoying or cute.
* SuperMode: Her Cross Fire Sequence, AKA "the battle mode where it looks like she's just wearing body paint".
* TrouserSpace: She keeps her funnels in her skirt when in her school uniform. Later on it is revealed that she keeps a ''two-handed sword'', of all things, down there as well.
* TsurimeEyes
* VaporWear: When not in human attire she wears... paint.
* VictoriasSecretCompartment: Despite having a smaller bust size than Nyarko.
* WrongGenreSavvy: In Episode 7, after Cuuko laments that no game console may replace the Xoth-731, Mahiro comforts her, telling her that someday something that can fill the void left by Xoth-731 will come her way. Cuuko thanks him, but tells him not to try setting up an EventFlag with her; Mahiro plays along.
-->'''Mahiro:''' "Don't worry about that. Should a flag come up, I would break it immediately."
* {{Yandere}}: {{Subverted|Trope}}. The first she does after hearing Nyaruko loves Mahiro is to declare she will kill him. After she understands Mahiro is ''not'' happy to have Nyaruko all over him, Cuuko never tries to hurt him and is rather pleased that he wants her help to get Nyaruko off his back.
* ZettaiRyouiki: She wears black thigh-high socks when in school uniform.
[[/folder]]

[[folder:Hasta]]
[[quoteright:268:https://static.tvtropes.org/pmwiki/pub/images/hasuta_haiyore.jpg]]
->'''Voiced by:''' Creator/RieKugimiya, Creator/TomokazuSeki (alternate form)

A young boy with long blond hair, who happens to be the humanized version of Hastur, the Unspeakable One, godde... ''deity'' of wind, depicted here more as the benign deity of shepherds than the [[OmnicidalManiac Rapine Storm]] [[TabletopGame/CthulhuTech version]]. He is also the son of the president of Carcosa Computer Entertainment (CCE), a famous video game developer.
----
* AdorablyPrecociousChild: His overall appearance, although he also attends Mahiro's Boryo Municipal High School.
* AgentPeacock: He looks really girly and has an obvious crush on Mahiro, yet he holds himself in battle very well.
* AmbiguouslyBi: In Volume 7, he admits that he feels warm and fuzzy around Luhy as much as he does with Mahiro, though he doesn't really understand anything further than that.
* BadassAdorable: See this incredibly cute little boy? He can also hold himself in battle.
* BecauseYouWereNiceToMe: Hasta fell in love with Mahiro after the latter [[CrashIntoHello bumped into him]] and helped him get up.
* BewareTheNiceOnes: He is the nicest guy in the cast, but he is also a capable fighter.
* {{Bishonen}}: Hasta has a face so girly that the only way to tell he's a boy is by his clothes.
* BlowYouAway
* CampGay: Less flamboyant than most examples, but fairly effeminate to fall into this trope rather than StraightGay.
* ColorMotif: He has long blond hair and his casual clothes and outfit of his SuperMode are all yellow. Likely a reference to both Hastur's depiction in "Haita The Shepard" (as a Benevolent God) and "The King in Yellow" and Lovecraft's stories (as well... The King in Yellow)
* TheCutie
* DudeLooksLikeALady: Because of Hasta's cute face and long hair, Mahiro thought he was a girl until Nyaruko called him "Hasta[[UsefulNotes/JapaneseHonorifics -kun]]".
* GayOption: Hasta is the only boy in Mahiro's harem, although he still looks and acts like a girl.
* HairAntennae: A couple of cowlicks.
* HairOfGoldHeartOfGold: The nicest of the aliens and the only one with blond hair.
* HumanoidAbomination: His most common Mythos depiction looks like a masked man, clothed in yellow rags, often with tentacles slipping through its hem.
* IncompatibleOrientation: No matter how much Hasta loves Mahiro and how girly he might be, Mahiro won't fall in love with another boy.
* InnocentBlueEyes
* InTheHood: Hastur, as the King, is often portrayed in artwork as being hooded. This is referenced visually by having Hasta wear a hoodie.
* LongHairedPrettyBoy: He has a pretty face and long blond hair tied into a side plait.
* LovableSexManiac: He's more subdued than Nyaruko and Cuuko, but he isn't shy to talk about how much he wants to "combine" with Mahiro.
* MoeAnthropomorphism: Of Hastur, the Unspeakable.
* TheMole: Outright tells Mahiro that he was sent by his father to gather data on Earth's entertainment from his mother Yoriko on behalf of the CCE, but decides to stay instead after the mission is called off.
* NiceGuy: By far the nicest of Mahiro's alien housemates and the one least likely to get him annoyed.
* NoSenseOfDirection
* TheNoseKnows: Has shown the ability to smell people from long distances.
* OlderAlterEgo: [[spoiler:His SuperMode is much taller and much more mature sounding. They also talk to him like he and regular Hasta were different people.]]
* OnlySaneMan: Between Nyarko and Cuuko's squabbles, back in space grade school, he used to act as their middleman.
* PinkySwear: Hasta suggests it to seal Mahiro's promise to consider his love confession again... ''in 25 million years''.
* PowerMakesYourHairGrow: His hair is much longer in his SuperMode.
* SceneryCensor: Happens in the BeachEpisode of season 2 when the water constantly flows to censor his chest.
* StudentCouncilPresident: During his, Nyarko and Cuuko's space elementary school days.
* SuperMode: [[spoiler: His "King in Yellow Form", first seen in episode 3 of ''Nyarko-San W'' and voiced by Creator/TomokazuSeki.]]
* TenderTears: Following the tradition of Creator/RieKugimiya's characters, poor kid leaves the cafeteria crying in Episode 7, thinking Nyarko is pregnant with Mahiro's child.
* TokenMiniMoe: Hasta is the shortest member of the main cast and looks like an adorable preteen girl despite being a boy and about the same age as Nyaruko and Cuuko.
* TheTwink: Blonde, looks really young, positively gay for Mahiro.
* WholeCostumeReference: [[spoiler:The bandage-looking outfit he wears in "King in Yellow Form" is based on what Music/TMRevolution [[http://bit.ly/172jffp wore]] in the music video and single cover for his song "Hot Limit".]]
[[/folder]]

[[folder:Shantak-kun]]
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/shantak_kun_haiyore.jpg]]
->'''Voiced by:''' Creator/TomokoKaneda (drama CD and first anime) and Creator/SatomiArai (second and third anime)

Nyarko's pet, a female shantak (avian with horse's head and bat wings).
----
* DarkIsNotEvil
* {{Expy}}: A MixAndMatchCritter [[Anime/TenchiMuyo that likes carrots and can change into a spaceship]] [[spoiler:or a girl]].
* GodivaHair: [[spoiler:When she first turns into a human, she naturally has no clothes on. Her hair covers anything important.]]
* HeadPet: Is seen riding atop Yoriko's head a couple of times.
* HumanityEnsues: [[spoiler: Briefly in the seventh volume/episode 8 of season 2 thanks to Cuuko.]]
* InvoluntaryShapeshifting: Nyarko can [[Series/KamenRiderDecade Final Form Ride]] Shantak-kun into a CoolBike or a spaceship (which is how she came to Earth in the first place).
* PetMonstrosity: Before it got one-shotted by a Nightgaunt on Episode 1 of the second anime.
* RapunzelHair: [[spoiler:In her human form, her hair goes past her waist.]]
* RidiculouslyCuteCritter: Lampshaded by Nyarko in episode 1 after it gets defeated by a Nightgaunt: "They say the weaker they are, the cuter they are!"
* SleepModeSize: Spends most of her time like this recovering[=/=]conserving energy, only changing into her full-size form on the rare occasions when they need her.
* TeamPet
* TrademarkFavoriteFood: Carrots.
* TheUnintelligible
* YouGottaHaveBlueHair: [[spoiler:In her human form.]]
[[/folder]]

[[folder:Luhy Distone]]
[[quoteright:267:https://static.tvtropes.org/pmwiki/pub/images/ruuhii_jistone.jpg]]
->'''Voiced by:''' Creator/MarikoKouda

A green-haired woman and employee of Cthulhu Corporation, a rival video game developer to CCE (run by Hasta's father). She's also the humanized version of a Cthulhi, the star-spawn of [[Franchise/CthulhuMythos Cthulhu himself]] and the closest thing to the Big C to appear in the series to date.
----
* AbsoluteCleavage: Her business suit is really low cut and revealing.
* AnIcePerson: Uses ice attacks against some mooks during the final battle in Episode 12.
* BigDamnHeroes: Pulls this in episode 12 to help everyone fight off [[spoiler:Roy Fogger the Lloiger]].
* CoolCar: The Delorean. Yes, [[Franchise/BackToTheFuture THE]] Delorean.
* EldritchAbomination: Her true form is, naturally, a pulpy green humanoid monstrosity with a tentacled head and wings. Contrast that with this smoking-hot lady.
* FallenOnHardTimesJob: From game console developer to takoyaki vendor and a MagicalGirl actress... isn't it sad, Luhy?
* HeelFaceTurn: After Episode 6, she bounces back from her VillainousBreakdown and tells everyone she has no hard feelings, and she even helps Mahiro escape the [[LotusEaterMachine cursed dating sim in Episode 8]].
* HumiliationConga: Yoriko warns her that Xoth-731 is too high-end and thus too expensive for commercial release, gets a call from her CEO telling her that she (and her entire department) had been laid off, and had to watch Cuuko reluctantly destroy Xoth-731 after it caused Deep Ones to be brainwashed by a ZombieApocalypse game currently uploaded into the system... poor lady.
* HotForStudent: [[spoiler:Becomes a teacher for Mahiro's class, and certainly acts this way towards Hasta.]]
* HotTeacher: [[spoiler:Becomes one late in the light novels.]]
* MaamShock: When Mahiro ran by asking for help, Luhy seemed willing to help...until the cute little girl clinging to his back called her "obaa-chan". For that, she instantly ratted the pair out to Nyarko.
** And again in "How to Defeat a Kind Enemy", where Nyarko snarkily calls Luhy a 30-year-old, which causes her to ice up the room and angrily declare that even if you round her age, she's still in her 20s.
* MagicalGirl: She performs as one in one of her jobs.
* {{Meganekko}}
* MsFanservice: Everything about her, from her glasses to her business suit, is attractive.
* MoeAnthropomorphism: Of a Cthulhi, the spawn/servants of Cthulhu himself.
* NiceGirl: Post HeelFaceTurn, she is really one of the more consistently helpful and kindhearted characters in the series.
* NothingPersonal: When she runs into the cast after the Xoth incident, she's quick to insist that the only reason they were enemies is because of her old job with the Cthulhu Corporation and that she wants to bury the hatchet -- especially with Hasta, since she thought he was an industrial spy and was therefore harsher towards him than everyone else.
* TheRival: She declares Mahiro one in the light novels after she realizes she has feelings for Hasta.
* VillainousBreakdown: PlayedForLaughs in Episode 6. Upon learning that Cthulhu Corp. is ditching its gaming department, she stoops in defeat with DullEyesOfUnhappiness before she breaks down LaughingMad in a desperate attempt to complete Xoth-731 before her superiors pull the plug on the project once and for all.
* YouGottaHaveBlueHair: Green hair in her case.
[[/folder]]

[[folder:Yoriko Yasaka]]
[[quoteright:271:https://static.tvtropes.org/pmwiki/pub/images/yasaka_yoriko.jpg]]
->'''Voiced by:''' Creator/KikukoInoue (drama CD and first anime) and Creator/AyaHisakawa (second anime)

Mahiro's mother and a part-time monster hunter.
----
* ActionMom: Works as a part-time demon hunter (her introduction in Episode 4 even makes some {{Shout Out}}s to VideoGame/MonsterHunter).
* AdmiringTheAbomination: To an extent. While her son is somewhat freaked out and disturbed by Nyarko and Cuuko, she is more than happy to call some of their antics adorable, though she also makes it clear she will not hesitate to berate them should they cross her.
* AffectionateNickname: Always calls Mahiro "Hiro-kun"; while pretending to be even fluffier during the DatingSim episode, she went with "Mahiro-chan".
* AlliterativeName
* AscendedFangirl: Just like her son, but unlike him she readily welcomes Nyarko, Cuuko and Hasta into their household.
* BadassAdorable: In bright-and-sunny attitude and youthful appearance, Yoriko can ''easily'' be mistaken for for Mahiro's cute big sister.
* CuddleBug: Frequently embraces her son upon returning from her adventures, supposedly to recharge her "sononium".
** During the TrappedInTVLand episode, she pretends her personality's been "rewritten" as an excuse to be even snugglier towards Mahiro; when he says "Knock it off Mom, I know you're just faking it," she's quite disappointed.
* GamerChick: Collector of consoles of all sorts.
* HappilyMarried: At the start of the second series, she's in the middle of her ''seventeenth'' honeymoon. While this might seem like a cover for her monster-hunting, Yoriko confirms that her husband is fully aware of her work, and that his being so supportive is part of the reason she loves him so much (while blushing).
* HaremNanny
* ImprobableWeaponUser: Just like her son, she uses forks as her main weapon.
* ItRunsOnNonsensoleum: She claims that she ''needs'' to [[CuddleBug cuddle Mahiro]] because it produces a substance called "Sononium" ("''Musukonium''" in Japanese) which she needs to function properly; if she doesn't get her daily dose she becomes depressed and lethargic.
* MamaBear: Eased off on this after her initial meeting with Nyarko and Cuuko, especially after they explained themselves, but both are now conscientious enough to keep within Yoriko's good graces.
* MoreDakka: Mahiro's fork = good. Yoriko's eight forks = better.
* MumLooksLikeASister: [[http://2.bp.blogspot.com/-o2pckixr3MI/T6ZLl3sS6FI/AAAAAAAABbI/52dGehiO_uM/s1600/books.jpg Compare how she looks next to Mahiro]] and tell us that she doesn't look like she would possibly be his older sister.
* NoodleIncident: In the light novels, it's revealed that Yoriko has apparently crossed paths with Atlach-Nacha (Atoko) in the past, and whatever happened between them resulted in Atoko utterly despising Yoriko.
* OlderThanSheLooks: Just looking at her, you would never believe she had a 17-year-old son.
** Made more blatant in the second season, when she flashes back to the day her husband proposed; the only noticeable difference between then and now is the way she wears her hair.
* OverprotectiveMom: Has minor elements of this, especially in her first appearance where she makes it '''very''' clear that she won't tolerate any untowards behavior directed at her Hiro-kun.
* ParentalIncest: Not normally, but thanks to an [[KissingUnderTheInfluence alien love potion]] in episode 11 of ''Nyarko-San W'', she starts leaning that way.
* ShipperOnDeck: After warming up to Nyarko, Yoriko doesn't just give her approval for her and Mahiro to date, but seems to be gently nudging them towards each other. Particularly in episode 7 of the second TV series, where she convinces Mahiro to take Nyarko on a date to apologize for his HeroicBSOD-inducing BrutalHonesty, then makes sure Cuuko and Hasta don't interfere.
* SpeaksFluentAnimal: She seems to be the only other character besides Nyarko that can understand what Shantak is saying.
[[/folder]]

[[folder:Tamao Kurei]]
[[quoteright:246:https://static.tvtropes.org/pmwiki/pub/images/kurei_tamao.jpg]]
->'''Voiced by:''' Creator/YokoHikasa (Flash series) and Creator/YukaOotsubo (Anime series)

A classmate of Mahiro, Nyarko, Cuuko and Hasta, who is always on the prowl for the hottest news in school.
----
* BeautyMark: She has one under the left side of her mouth.
* DarkHorseVictory: She [[ConversationalTroping discusses]] this in the the TrappedInTVLand episode, pulling Mahiro into a secluded closet while Nyarko, Cuuko, and Hasta are busy fighting over him. However, she quickly lies and says that she was just joking, since as noted below [[IWantMyBelovedToBeHappy she's fine with letting Nyarko have him]].
* {{Foreshadowing}}: [[spoiler:Her body was temporarily taken over by Isuka, a Yithian. Yithians have megaphone-shaped appendages.]]
* GenkiGirl: Not as pronounced as Nyarko, but she definitely shows a lot of zeal with her hobby.
* GrandTheftMe: [[spoiler:Throughout Episodes 9-10, courtesy of Isuka, a Yithian who wanted to alert Nyarko of her extremist kin's plans.]]
* IWantMyBelovedToBeHappy: She has feelings for Mahiro, but because she feels she cannot compete with Nyarko (and considers her a good friend), Tamao steps aside and becomes a ShipperOnDeck.
* IconicItem: Megaphones. They are even the principal design of her ribbons.
* InSeriesNickname: "Walking Speaker"
* MatchmakerCrush: She works to get Mahiro and Nyarko together pretty much from Day 1, ignoring her own feelings for him.
* TomboyishPonytail
* UnwittingInstigatorofDoom: While doom may be an overstatement, Tamao always pushes Nyarko to be aggressive in her pursuit of Mahiro. Which only [[NoGuyWantsToBeChased pushes him away.]]
* WistfulAmnesia: [[spoiler:Isuka thought she already erased Tamao's memories of [[GrandTheftMe her body being used by the Yithian]]. She actually remembers most details of their interaction, [[FriendshipMoment and decides to become her friend]].]]
[[/folder]]

[[folder:Takehiko Yoichi]]
[[quoteright:190:https://static.tvtropes.org/pmwiki/pub/images/yoichi_takehiko.jpg]]
->'''Voiced by:''' Creator/YoshihisaKawahara (Flash series) and Creator/WataruHatano (Anime series)

Mahiro's best friend and confidant.
----
* TheAce: Episode 4 of ''Nyarko-San W'' shows him bowling three perfect games in a row, and then doing the same with 9-Ball. This is implied in the same episode as being the result of Isurugi, the yithian, sending him "happiness waves" from the distant future in an attempt [[spoiler: to make up for possessing his body]].
* BromanticFoil
* GayOption: In the [[TrappedInTVLand dating sim]] episode 8, it's suggested that he might confess his feelings for Mahiro if the latter fails to pick a love interest by the end of the game.
* GrandTheftMe: [[spoiler:In Episodes 9-10, courtesy of Isurugi, a rogue Yithian attempting to pull a grander version of this trope upon the rest of humanity to acquire their entertainment. He willingly leaves Yoichi after pulling off a HeelFaceTurn.]]
* NiceGuy
* OnlySaneMan: Besides Mahiro, he is the most level-headed of the cast... though [[NotSoAboveItAll on occasion he would join their antics]].
* StudentCouncilPresident
* WelcomeToCorneria: Gets stuck doing this in the TrappedInTVLand episode, which makes for a pretty funny image when Mahiro [[GetAHoldOfYourselfMan grabs his shoulders and shakes him]], all with the text box hovering in mid-air between them.
[[/folder]]

[[folder:Isuka]]
->'''Voiced by:''' Creator/SatomiArai

A Yithian.
----
* ChekhovsGunman: Plays a major role in a later novel, where [[spoiler:she helps Mahiro go back in time to save Nyarko and Cuuko from being [[RetGone Ret Gone'd]] by a bitter classmate.]]
* FriendshipMoment: [[spoiler:Tamao befriends her even after Isuka had to leave her body after the former wakes up in midnight to see Isuka trying to finish a game.]]
* GrandTheftMe: Like all Yithians, [[spoiler:in her case, Tamao]].
* MySpeciesDothProtestTooMuch: Isuka came to Earth to warn Nyarko of a group of extremist Yithians intending to pull off a massive GrandTheftMe upon humanity to take over their entertainment.
* SpellMyNameWithAnS: Is it Isuka or [[IncrediblyLamePun Yithka]]?
[[/folder]]

[[folder:Isurugi]]
->'''Voiced by:''' Creator/WataruHatano

A rogue Yithian and member of an extremist faction of Yithians who intend to pull off a massive GrandTheftMe upon humanity.
----
* AntiVillain
* DefectorFromDecadence: [[spoiler:Upon realizing that their boss is actually using the extremists for his puritanical campaign.]]
* GrandTheftMe: Like all Yithians, [[spoiler:though in his case, he wants to pull off a massive version of this trope upon humanity to obtain all their forms of entertainment. Unfortunately, his faction's boss turns out to be a [[SpaceX Space]] [[MoralGuardians Moral Guardian]]]].
* HeelFaceTurn
* WellIntentionedExtremist: He just wants to take over humanity's entertainment. [[spoiler:Too bad his faction's boss [[KillAllHumans had other ideas]].]]
[[/folder]]

[[folder:Ato-ko Shirogane]]
[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/NyarukoAthko_9297.png]]
->'''Voiced by:''' Azusa Kataoka (now Azusa Enoki)

A beautiful woman in a kimono who comes to Mahiro's house in ''Remember my Love(craft-sensei)'', and plays a much larger (and more sinister) role in later novels. She's also the humanized form of Atlach-Nacha, the Spinner in Darkness.
----
* AloofDarkHairedGirl: Played with. She appears to be aloof, but is really a CovertPervert.
* CanonImmigrant:
** In the original Mythos, Atlach-Nacha lacked any connotation of being promiscuous. Thanks to [[VisualNovel/AtlachNacha a certain game]], this attribute was given to the Great Old One in Japan.
** Ato-ko herself first appears in ''Remember my Love(craft-sensei)''. The novels only briefly mentioned her as a certain being with a grudge against Yoriko, until her actual appearance in volume 10.
* ClusterBleepBomb: Her discussion with Cuuko is almost totally bleeped out. Whatever was said, it embarrasses even [[LovableSexManiac Cuuko]].
* CovertPervert: Once her gentle facade is taken off, she's quite the pervert of a level that mortifies even Cuuko.
* {{Cuckold}}: In the light novels, it's revealed that her "hobby" is stealing boyfriends away from her female friends, then dumping the guy afterwards since all she cared about was the ''schadenfreude'' she got out of destroying the relationship. The more in love said couple is, the more fun Ato-ko has breaking them up...and she's set her sights on Mahiro.
* {{Expy}}: Looks like [[VisualNovel/AtlachNacha Hirasaka Hatsune]] in a kimono from Atlach=Nacha (Ato-ko's namesake). Interestingly, Shirogane is also the name of the antagonist in that VisualNovel.
* {{Foreshadowing}}: Her only "appearance" in the two regular series is in ''Nyarko-San W'' episode 11, where she sent Nyarko a box of chocolates...which turn out to be laced with a LovePotion, suggesting that she's attempting to set Mahiro and Nyarko up for her inevitable boyfriend-theft attempt.
* HumanoidAbomination: Basically a GiantSpider with a quasi-human face.
* TheInternetIsForPorn: She asks Mahiro to help her find a picture of a dog she saw online earlier. When Mahiro opens up her browser history, it's nothing but porn (and judging by the timestamps, she was browsing a large number of sites at the same time). For that matter, her desktop image is a salacious image of herself.
* MoeAnthropomorphism: Of Atlach-Nacha.
* MySensorsIndicateYouWantToTapThat: She can smell people's love for one another, which she uses to pick out the best moment to steal a guy from another woman. She also confirms that, despite Mahiro's fervent denial, he really ''does'' like Nyarko.
* NoodleIncident: In the light novels, it's revealed that Atoko utterly despises Yoriko because of some incident in the past where they crossed paths. Thus, her pursuit of Mahiro might have a minor revenge element to it as well.
* RelationshipSabotage: This is more or less her hobby.
* WeakButSkilled: According to Nyarko, she's not amazingly powerful but is still a tough opponent because her attacks ([[AllWebbedUp webbing]] and [[PoisonIsEvil poison]]) are hard to deal with.
* YamatoNadeshiko: Looks the part, but [[CovertPervert not the attitude]].
[[/folder]]

[[folder:Nyarue]]
[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/NyarukoNyarue_3224.png]]
->'''Voiced by:''' Sayuri Hara

Another Nyarlathotepian and Nyarko's cousin. Appears in ''Remember my Love(craft-sensei)''.
----
%% * {{Adorkable}}
* BatterUp
* CanonForeigner: Exclusive to ''Remember my Love(craft-sensei)''
* EldritchAbomination: Her real form, censored to protect the audience's sanity.
* InformedAttribute: Nyarko says that she carries a bat because she's athletic, but the only time we see her wield it is in the ending credits. Most of the time she just flails around in a panic.
* {{Meganekko}}
* ShapeshifterIdentityCrisis: Has a tendency to return to her true form when embarrassed.
* PassionateSportsGirl: Being more interested in sports, she always carries a bat around with her.
[[/folder]]

[[folder:Nodens]]
->'''Voiced by:''' Creator/BinShimada

A space smuggler who intended to abduct Mahiro as a subject of space BoysLoveGenre shows.
----
%%* HarmlessVillain
* HypotheticalCasting: Manta Aisora explicitly said he wanted Shimada to play Nodens; this was apparently the only specific casting choice he had in mind.
* IdenticalStranger: The different Nodens...es?; [[LampshadeHanging lampshaded]] in episode 12 of ''Nyarko-San W'' where the Nodens working for the PDO says that he's apparently got the kind of face that people find familiar.
* InexplicablyIdenticalIndividuals: In the last episode of ''Nyarko-San W'', Mahiro is surprised and pissed off to find Nodens working for the PDO, but they're told there are actually multiple Nodens...ies?, and this one isn't the same as the one who tried to sell Mahiro as the star of a BoysLove show.
** Though the "good" Nodens does immediately remark that Mahiro has the right look for that kind of work, and immediately gets chastized.
* {{Kaiju}}: His act on a children's stage show on Episode 9, opposing Luhy as a MagicalGirl.
%%* TheManBehindTheMonsters
%%* PrehensileHair
%%* SimpleStaff
[[/folder]]

[[folder:Nyar-o]]
[[quoteright:169:https://static.tvtropes.org/pmwiki/pub/images/nyaruo_674.jpg]]
->'''Voiced by:''' Creator/DaisukeHirakawa (Flash series) and Creator/TakeshiKusao (Anime series)

Nyarko's older, dumber brother.
----
* BigBadWannabe
* BookDumb: So dumb he dropped out of a C-list college, whereas Nyarko became [[TeenGenius the best of her class at a top university]].
* ButtMonkey: Towards Nyarko.
* CosmicPlaything: Not even Mahiro got to meet him!
* FreudianExcuse: Blames a childhood incident where Nyarko accidentally hit him on the head during a game of space baseball for becoming BookDumb.
* HarmlessVillain: In the anime, getting hit ''in the toe'' by Nyarko's motorcycle makes him ATwinkleInTheSky; subverted in the light novel, where he survives that and comes back to put up a decent fight, but still gets his ass kicked.
* IdiotHair
* MoeStare: Surprisingly gets these every time he is suddenly confronted with trouble, be it Nyarko's crowbar or Cuuko's funnels.
* ShockAndAwe: Only in the light novel. His Howler in the Dark form use lightning balls as a weapon.
* WhiteHairBlackHeart
[[/folder]]

[[folder:Cuune]]
[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/kuune_haiyore.jpg]]
->'''Voiced by:''' Creator/RyokaYuzuki

Cuuko's cousin, who harbors a huge crush on her.
----
* ChildhoodMarriagePromise: When they were young, she got Cuuko to say things like "I love cousin Cuune and want to marry her when I grow up" into a tape recorder; as far as she's concerned, that counts as a legally binding marriage contract.
* ClingyJealousGirl: Does not take it well when Cuuko says she's in love with Mahiro.
* ColorFailure: When Cuuko announces her "engagement" to Mahiro.
* CurtainsMatchTheWindow
* ElementalHair
* FieryRedhead
* GamerChick: Likes to coax Cuuko into playing video games with her.
* HopelessSuitor: She just refuses to admit the possibility is all.
* KissingCousins: She wants to marry her cousin Cuuko.
* LovableSexManiac: Feels Cuuko up in her introductory scene.
* MadLove: Just like Cuuko with Nyarko, Cuune tends to be all over Cuuko and even though Cuuko makes it clear she does not want to fufill their "ChildhoodMarriagePromise", Cuune just won't leave her alone. Cuuko has to pretend to be engaged to Mahiro to get Cuune off her back. Cuune cannot even ''fathom'' the idea that Cuuko might be in love with somebody other than her, and several times during Cuuko's "date" with Mahiro she's half-ready to attack and/or kill him.
* PlayingWithFire: Due to being a Cthugaian like Cuuko.
* PsychoLesbian: Primarily motivated by her lust for Cuuko, just like how Cuuko behaves around Nyarko.
* RapunzelHair
* RedEyesTakeWarning
* ShoutOut: Her intro has her tell Mahiro [[Manga/FistOfTheNorthStar "omae wa mo shindeiru"]]. And then she proceeds to use GratuitousEnglish to say [[https://www.youtube.com/watch?v=Mdju-W_ZAnw Welcome to this crazy time.]]
* StalkerWithACrush
* VictoriasSecretCompartment: Which has enough space to store a binder ''and'' tape recorder.
[[/folder]]

[[folder:Tsuruko]]
[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/tsurukonyarko_8477.jpg]]
->'''Voiced by:''' Saki Yamakita

An alien {{doujinshi}} artist, who draws manga based on Mahiro after hearing about it from Nyarko. She visits and lives on Earth illegally in the hopes of meeting him someday.
----
* AffectionateParody: Of the YaoiFangirl archetype, including gladly referring to herself as "rotten" (an insulting nickname for yaoi fans, at least in Japan) and saying her favorite quote is "[[{{Manga/Genshiken}} There's no such thing as a girl who doesn't like homos!]]"
* AllWomenAreLustful
* ButtMonkey: Her attempts to meet Mahiro are always thwarted in one way or another.
* LoonyFan: Of Mahiro's; every time she appears, she's plotting out the order in which she's going to shake his hand, get an interview, have him autograph her ''doujin'', etc. It never once occurs to her that he might ''not'' enjoy being the "star" of a BoysLove comic...
* {{Meganekko}}
* MoeAnthropomorphism: Of Ut'ulls-Hr'ehr, one of the Great Old Ones; one Japanese pronunciation of the name is "Uu'''tsuru''' Heea" (ウーツル＝ヘーア), from which "Tsuruko" comes.
* OtakuSurrogate: She is obsessed with manga to the point of living on Earth and creating some herself.
* ShipTease: With Yoichi, who runs into her at least twice. The first time time is a NotWhatItLooksLike moment in episode 4 of season 2 caused by Isurugi, the second in episode 11 with him being under the influence of a LovePotion.
* YaoiFanGirl: She is the artist for a yaoi doujinshi featuring Mahiro.
[[/folder]]
----

These are the characters of ''LightNovel/NyarkoSan'' that crawl up to us with a smile!

* YourCheatingHeart: When Ato-ko shows up in the light novels, it's revealed that she's a serial boyfriend-stealer. However, it has nothing to do with love whatsoever; she feeds on the despair that the break-up causes, and then immediately dumps the guy afterwards. Her current target is Mahiro, but she's still waiting for the best moment to strike.

* SecondYearProtagonist: And he's seventeen. We know because Nyarko has NoSenseOfPersonalSpace.

* AmbiguouslyBi: She is madly in love with Nyarko but she also develop some feelings for Mahiro.Look on the SingleWomanSeeksGoodMan below.

* AmbiguouslyBi: She is madly in love with Nyarko but she also develop some feelings for Mahiro.
Look on the SingleWomanSeeksGoodMan below.

* AmbigiouslyBi: She is madly in love with Nyarko but she also develop some feelings for Mahiro.

* BadassBisexual: She is the humanized version of Cthugha, which gives her powerful fire powers. She also wants to marry both Nyarko and Mahiro.

* BadassGay: He looks really girly and has an obvious crush on Mahiro, yet he holds himself in battle very well.

* HaremSeeker: After warming (pun not intended) to Mahiro, her plan changes from "marry Nyarko" to "I bear Nyarko's child, [[MrSeahorse the boy bears mine]]". When he questions it, she responds by saying [[ComicallyMissingThePoint "My party system supports up to four characters."]]

* HairDecorations: She ties her twin-tails up with a pair of black ribbons that look like flames.

* HairDecorations: Wears a ribbon shaped like a pair of megaphones.

* BiTheWay: She eventually does fall for Mahiro. Mahiro isn't exactly thrilled, as one of the consequences of this is now Cuuko wants [[MrSeahorse him to carry her (planned) child]].

* MumLooksLikeASister: [[http://2.bp.blogspot.com/-o2pckixr3MI/T6ZLl3sS6FI/AAAAAAAABbI/52dGehiO_uM/s1600/books.jpg Compare how she looks next to Mahiro]] and tell me that she doesn't look like she would possibly be his older sister.

* SpoiledSweet

** Cuuko wants to get banged by Nyaruko ''badly''. Cuuko doesn't even care if [[FreakyFridaySwitch there's another person inside Nyaruko's body]], she only wants to get her hands on it.

* {{Tsundere}}: A male Type B -- he's a genuinely nice and friendly guy by default, but has little to no patience with Nyarko and co.'s madcap antics. These tendencies are more prominent with Nyarko; he claims to hate Nyarko's open affection, but no matter how often he brings out the fork, he obviously finds her cute. [[spoiler:His deredere comes out when he, in Nyarko's body, realized how willing she is to protect him even with so lithe a body, deciding that he should start being nice to her.]]

* DudeLooksLikeALady: Because of Hasta's cute face and long hair, Mahiro thought he was a girl until Nyaruko called him "Hasta[[UsefulNotes/JapeneseHonorifics -kun]]".

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s01_3289.jpg]]

* ShamelessFanserviceGirl

* ZettaiRyouiki: Grade A.

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s02_119.jpg]]

%%* NoGuyWantsToBeChased:

* OnlySaneMan: What he is desperately trying to remain.

* StraightMan: With Nyarko, you would have to be.

* UnwantedHarem

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s03_6859.jpg]]

* ClingyJealousGirl

* DefrostingIceQueen: Starts out as just Nyarko's PsychoLesbian StalkerWithACrush determined to kill Mahiro. Since Mahiro was able to exploit her PsychoLesbian crush on Nyarko long enough to get her off his back and even win her over as a mutual ally, she quits trying to kill Mahiro and their relationship becomes of the "like, not love" kind. She gradually warms to Mahiro thanks to his being a genuinely nice person and eventually falls for him too. Although it doesn't affect her obsession with Nyarko at all, she at least becomes willing to [[HaremSeeker share her with Mahiro]] and comes to be a lot nicer to him.

* HairDecorations

* LovableSexManiac

* PsychoLesbian: She will side with the bad guys for a chance at putting her hands on Nyarko. Mahiro works around this trope to get her off his back and win her over as a mutual ally. Not that it's going to stop her from hitting him, usually for [[InsaneTrollLogic very questionable reasons]].

* ShipperWithAnAgenda: She ships Mahiro with Hasta so she can have Nyarko for herself, although she later [[HaremSeeker changes her plans about Mahiro]].

* {{Yandere}}: Nyarko likes a guy? She will char him for good.
* ZettaiRyouiki: Grade A.

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s04_7682.jpg]]
->'''Voiced by:''' Creator/RieKugimiya[[spoiler:, Creator/TomokazuSeki (alternate form)]]

* DudeLooksLikeALady: With just looking at him at first glance, you would definitely mistake him for a girl. He dresses as a guy, at least.
* GayOption

* HairOfGoldHeartOfGold: Likely a reference to both Hastur's depiction in "Haita The Shepard" (as a Benevolent God) and "The King in Yellow" and Lovecraft's stories (as well... The King in Yellow)

* IncompatibleOrientation: He likes Mahiro a lot. As in the ''romantic'' variety.

* LongHairedPrettyBoy: His long hair just makes him look even more like a girl.

* NiceGuy: So sweet, cuddly and good-natured is he that it's hard to believe he is voiced by none other than Creator/RieKugimiya, [[PigeonholedVoiceActor queen of]] {{Shana Clone}}s.

* TokenMiniMoe: Of the main cast.

[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/nyarko-san_shantak-kun_7427.jpg]]

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s08_6119.jpg]]

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s07_2998.jpg]]

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s05_7059.jpg]]

* BeautyMark: Look under the left side of her mouth. Yep, that's the one.

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s06_7288.jpg]]

[[quoteright:200:https://static.tvtropes.org/pmwiki/pub/images/s09_5724.jpg]]

* {{Expy}}: Looks like [[VisualNovel/AtlachNacha Hirasaka Hatsune]] in a kimono. Interestingly, Shirogane is the name of the antagonist in that VisualNovel.

* BadassGrandpa: [[SubvertedTrope He actually only looks the part.]]
* HarmlessVillain

* TheManBehindTheMonsters
* PrehensileHair
* SimpleStaff
* YouLookFamiliar: See InexplicablyIdenticalIndividuals

* MoeAnthropomorphism: Of none other than Cthulhu.

* MasterOfTheMixedMessage: Nyarko will gladly, eagerly, tell Mahiro that she loves him. However, in episode 7 of the second TV series, he complains that her wacky, playful nature and near-constant lying makes it so that he isn't sure she even really means it. Nyarko calmly responds that she has trouble saying it ''unless'' she's acting silly, but assures him she's completely honest. [[SugarWiki/HeartwarmingMoments She then turns, smiles, and simply says "Mahiro, I love you."]]

* {{Adorkable}}

* GreenEyes

* HairOfGoldHeartOfGold: Likely a reference to both Hastur's depiction in "Haita The Shepard" (as a Benevolent God) and "The King in Yellow" and Lovecraft's stories (as well...[[CaptainObvious The King in Yellow]])

* LovableSexManiac: Much to Mahiro's chagrin, OnceAnEpisode she's either trying to bed him him or at least talking about it very loudly.

* AdaptationalHeroism: Nyarko may be [[ComedicSociopathy a bitch]], but compared to the Franchise/CthulhuMythos' [[SatanicArchetype Nyarlathotep]] she is a saint. While the original Nyarlathotep was a malicious {{Troll}}, she's more like a ManicPixieDreamGirl with {{Troll}} tendencies toned down: she drives Mahiro up the wall by being so goofy and telling BlatantLies (like claiming he got her pregnant), but rather than malice she does it because she has a hard time expressing her feelings for him any other way.

* TheAce: She's beautiful, athletic, intelligent, makes friends easily, is a good cook, her family's golden child, and a famous and respected space cop. If not for her flaws (namely her clinginess, playful fibbing and inability to operate at a level below "Overdrive") being so blatant, she'd easily fall into Mary You-Know-Who territory.

* AdaptationalHeroism: Nyarko may be [[ComedicSociopathy a bitch]], but compared to the Franchise/CthulhuMythos' [[SatanicArchetype Nyarlathotep]] she's a saint. While the original Nyarlathotep was a malicious {{Troll}}, she's more like a ManicPixieDreamGirl with {{Troll}} tendencies toned down: she drives Mahiro up the wall by being so goofy and telling BlatantLies (like claiming he got her pregnant), but rather than malice she does it because she has a hard time expressing her feelings for him any other way.

*** During the FreakyFridayFlip plot, Nyarko even laughed ''with'' Mahiro at her own suggestion that [[spoiler:the time-travelling rebel had stolen Yoichi's body]], saying it'd be way too convenient. So of course, it turns out she was right.

** Even as a Magical Girl, she references ''Series/KamenRiderKuuga'' and ''Anime/{{Dancougar}}''; you can take the tiger out of the jungle, but you can't take the jungle out of the tiger.

* CanNotSpitItOut: In episode 5 of ''Nyarko-san W'', he mutters to himself that he'd probably be more interested in Nyarko if she wasn't so manic; he actually says this ''in'' Nyarko's presence, but refuses to repeat himself when she says "What did you say?".
* CantActPervertedTowardALoveInterest: [[spoiler:In the wake of [[FreakyFridayFlip his body-swap with Nyarko]] he can't even find the courage to look at the latter's naked body while taking a bath.]]

* NonActionGuy: Not that he can't hold himself in a fight, but when he has {{Eldritch Abomination}}s chasing after him, he'd be powerless without Nyarko, Cuuko and Hasta rushing into his defense.

* StraightMan: With Nyarko, you'd have to be.

** Mahiro has claimed to be Player Character in ''TabletopGame/CallOfCthulhu'', which makes him afraid Nyarko will turn out to be just like the Lovecraftian Nyarlathotep. If he realized he was in a LovecraftLite RomCom and that Nyarko actually ''is'' in love with him, he'd probably be a lot happier. She is driving him insane, just not in the way he's thinking.

* {{Irony}}: She's living fire, and yet is a ''nekojita'' (literally "cat's tongue") -- someone who can't handle hot or spicy foods.

-->'''Mahiro:''' "Don't worry about that. Should a flag come up, I'd break it immediately."

* OlderThanSheLooks: Just looking at her, you'd never believe she had a 17-year-old son.

* IWantMyBelovedToBeHappy: She has feelings for Mahiro, but because she feels she can't compete with Nyarko (and considers her a good friend), Tamao steps aside and becomes a ShipperOnDeck.

* OnlySaneMan: Besides Mahiro, he is the most level-headed of the cast... though [[NotSoAboveItAll on occasion he'd join their antics]].

* MadLove: Just like Cuuko with Nyarko, Cuune tends to be all over Cuuko and even though Cuuko makes it clear she doesn't want to fufill their "ChildhoodMarriagePromise", Cuune just won't leave her alone. Cuuko has to pretend to be engaged to Mahiro to get Cuune off her back. Cuune can't even ''fathom'' the idea that Cuuko might be in love with somebody other than her, and several times during Cuuko's "date" with Mahiro she's half-ready to attack and/or kill him.

* DomesticAbuser: His physical violence on Nyarko and Cuuko are treated as [[PlayedForLaughs comedy]].