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Characters / Haiyore! Nyarko-san

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These are the characters of Nyarko-san that crawl up to us with a smile!

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Voiced by: Kana Asumi
An energetic silver-haired girl who happens to be an anthropomorphized form of the Crawling Chaos, Nyarlathotep.
  • The Ace: 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.
  • Action Girl
  • Adaptational Heroism: Nyarko may be a bitch, but compared to the Cthulhu Mythos' Nyarlathotep she is a saint. While the original Nyarlathotep was a malicious Troll, she is more like a Manic Pixie Dream Girl with Troll tendencies toned down: she drives Mahiro up the wall by being so goofy and telling Blatant Lies (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.
  • All Women Are Lustful
  • Anguished Declaration of Love: 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.
  • Ax-Crazy
  • Badass Adorable: Look at that shining smile and those huge emerald eyes. Look at her cutting a nightgaunt in half with a crowbar.
  • Berserk Button: 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 The Power of Love (which Mahiro immediately denies).
  • Bodyguard Crush: Literally begged her superiors for the mission to protect Mahiro after seeing his picture.
  • Bully Hunter: 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. Subverted later when Nyarko admits that 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. Which causes a grown-up and bitter Nyogta to erase the girls from existence.
  • Casual Kink: 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!"
  • Chainsaw Good: Yes, even a chainsaw is considered Space CQC.
  • Chaos Is Evil: 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.
  • Chekhov's Skill: The "battle" with Agent Smith turns the "Cyclone!" JOKER!!" Overly Long Gag into one of these, as Nyarko's ability to create Joker cards lets her easily beat Smith. Eternal trump card indeed...
  • Cleavage Window: Her Planetary Defense Organization uniform (seen in Nyar-O's flashback in episode 3) sports one.
  • Clingy Jealous Girl: She will never let anyone take Mahiro away from her.
  • Color Failure: Only second to Mahiro in frequency.
  • Combat Pragmatist: In every possible way. In the first episode she knees a Nightgaunt between the legs and then proceeded to bash the thing's head in with a rock.
  • Cool Sword: Her official list of powers include "a mechanical sword capable of cleaving dimensions"...better known as Kamen Rider OOO's Medajalibur. In the anime she only uses it in Nyarko-San W episode 9, as part of a mass of references to OOO.
  • Crowbar Combatant: Her Weapon of Choice.
  • Cry Cute: Usually Played for Laughs as a Running Gag every time Mahiro gives her either the snark, the cold shoulder or the fork. Then Played for Drama 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.
  • The Cuckoolander Was Right: 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 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 Chekhov's Gun 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 "Freaky Friday" Flip plot, Nyarko even laughed with Mahiro at her own suggestion that 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.
  • Cute and Psycho: She's cute and bubbly and downright vicious in combat. She's even worse when she becomes a Magical Girl, where she sets Nightgaunts on fire and makes them puke blood while going on about "purifying naughty childrens' souls".
  • Cute Bruiser: Her fighting style isn't exactly sophisticated, utilizing fists, kicks or some blunt instrument.
  • Cute Little Fangs
  • Dark Is Not Evil
  • A Date with Rosie Palms: Obviously her first order of the day after being stuck in Mahiro's body.
  • Disney Death: In Episode 10. She's actually fine — the black crystal she gave to Mahiro back in Episode 2 saw to that.
  • Even the Girls Want Her: Just ask Cuuko.
  • Everyone Has Standards: She may be a Lovable Sex Maniac, but even Ato-ko creeps her out.
    Mahiro: Nyarko, can I punch her?
    Nyarko: Please do.
  • Expressive Hair: Nyarko's cowlick can even form letters.
  • Genki Girl: And probably the most energetic Nyarlathotep ever.
  • Girl with Psycho Weapon
  • Gone Horribly Wrong: Mahiro has her become a Magical Girl 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 Axe-Crazy, as opposed to her usual Cute and Psycho merciless fighting style.
  • Gratuitous Foreign Language: Primarily English. Also, Italian.
  • Henshin Hero: With blatant nods to Kamen Rider, the Trope Namer franchise.
  • Heroic BSoD: 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 Hidden Eyes and utterly silent, literally having to be dragged along by the hand by Mahiro.
  • Heroic Comedic Sociopath: Mahiro's reaction to most of her methods is to wonder if she is Not So Different from her enemies, and she's prone to lots of Nominal Hero moments.
  • Holy Hand Grenade: Nyarko uses blasphemous hand grenades. Yes, actual hand grenades (with little pink ribbons around them).
  • Humanoid Abomination: 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 Henshin Hero. We have seen her brother take on an Eldritch form, though, so it stands to reason she can do much the same.
  • Hypocritical Humor: 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.
  • Idiot Hair: Prehensile idiot hair.
  • I Have Many Names: A search for her name in a library database brings up so many alternate names the system crashes.
  • Incoming Ham: Whether it's imitating another Large Ham ("Watashi, SANJOU!") or introducing herself with the Opening Narration from Galaxy Cyclone Braiger, you know exactly what to expect when Nyarlathotep walks into the room.
  • In-Series Nickname: A double example, with "Nyarko" being short for "Nyarlathotep", and that name being what people call her because her real name is The Unpronouncable.
  • Involuntary Shapeshifting: The light novels explicitly state that she has the power to transform others into weapons or vehicles, a Shout-Out to Kamen Rider Decade's Final Form Ride; she uses this in the anime to turn Shantak-kun into a Cool Bike, and Hasta into his Super Mode.
  • Large Ham
  • Let's Get Dangerous!: While she acts like a buffoon most of the time, when things get serious, she can really kick some ass.
  • Lovable Sex Maniac: Much to Mahiro's chagrin, Once an Episode she's either trying to bed him or at least talking about it very loudly.
  • Love Before First Sight: She was smitten with Mahiro with just looking at his photo.
  • Mad Love: 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.
  • Magical Girl: 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. It completely backfires.
    • Even as a Magical Girl, she references Kamen Rider Kuuga and Dancougar; you can take the tiger out of the jungle, but you cannot take the jungle out of the tiger.
  • Magical Girlfriend: 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 Gratuitous English; the most famous example is confusing "hate" and "(land)mine", because they're homophones in Japanese (kirai).
  • Manic Pixie Dream Girl: As noted elsewhere, this actually works to her disadvantage, since she's a bit too manic and clingy for Mahiro's tastes.
  • Master of the Mixed Message: 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 "default" outfit is actually a maid outfit; it's just less obvious because of the black apron and checkerboard-patterned bow and skirt.
  • Moe Anthropomorphism: Of Nyarlathotep, the Crawling Chaos.
  • Moe Stare: Her default expression whenever either Mahiro or some interesting Earth entertainment media is present.
  • Moment Killer: 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.
  • Motor Mouth: Nyarko will talk non-stop. About anything you haven't asked her about, of course.
  • Mystical White Hair
  • No Sense of Personal Space: 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".
  • Not Cheating Unless You Get Caught: 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 Not So Different from the smugglers she's supposed to apprehend, her reply is...
    Nyarko: "It's not a crime if no one finds out."
  • Oblivious to Her Own Description: When the Banshin starts obsessing over Mahiro and doing Henshin Hero poses, Nyarko thinks it's short-circuiting. She doesn't realize that it's acting exactly like her until Mahiro outright tells her as which point she thinks it's awesome.
  • Odango Hair: When swimming.
  • Only Known by Their Nickname: 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 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.
  • Opposites Attract: With Mahiro.
  • Rapunzel Hair
  • Red and Black and Evil All Over: The color scheme of her Full Force Armor, though she's not really evil... just violent and perverted.
  • Ret Gone: She and Cuuko get written out of existence by their old classmate Nyogta, but get restored by Mahiro and Yithka.
  • Rich Idiot with No Day Job: 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.
  • Rocket Punch: In episode 11 of Nyarko-San W, she executes Kamen Rider Fourze'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.
  • Rule of Cool: The light novels demonstrate that she can change into her Full Force Form with nothing but a thought; she just chooses to do Kamen Rider poses and say "Henshin!" because she's a fangirl and thinks it's awesome.
  • Savvy Guy, Energetic Girl: Energetic Girl to Mahiro's Savvy Guy.
  • Say My Name: "Maaahiro-san~!" So much that it's practically a Catchphrase in and of itself.
  • Shameless Fanservice Girl
  • Single-Target Sexuality: 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.
  • Smitten Teenage Girl
  • SpaceX: She refers to her fighting style as Space CQC.
  • Speaks Fluent Animal: She can understand what Shantak-kun is saying without the need for a translator like Kuuko.
  • Spell My Name with an "S": 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.
  • Stalker with a Crush
  • Super Mode: 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.
  • Super Speed: The light novels list Clock Up as one of her special powers; so far it's only been referenced for the sake of a gag.
  • Sweet Tooth: Thoroughly exploited by Cuuko.
  • Teen Genius: Goes back since childhood, much to her older brother Nyar-o's ire.
  • That Liar Lies: No, she does not carry Mahiro's child. Doesn't stop the rest of the cast from believing her, though.
  • Trouser Space: Nyarko keeps a chainsaw in her skirt. You read right. Her magical girl form keeps her trademark crowbar there.
  • Unpronouncable Names: Nyarko's real name is apparently extremely difficult for humans to pronounce; just comprehending it is said to strengthen the relationship between a man and a woman.
  • Unsympathetic Comedy Protagonist
  • Victoria's Secret Compartment: She keeps a full-size Pokeb-I mean, Monster Capsule inside her blouse, as well as her candid pictures of Mahiro.
  • Violently Protective Girlfriend: As Cuuko found out the hard way when she stated that she was going to toast Mahiro.
  • Voluntary Shape Shifter: According to the Light Novel, 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 Nanoha. Additionally, she can change into her Full Force Form with just a thought.
  • White Hair, Black Heart: Less evil, more "perverted".
  • Wingding Eyes: Gets visible stars in her eyes when visiting Akihabara.
  • Zettai Ryouiki: Grade A.

    Mahiro Yasaka
Voiced by: Eri Kitamura
A 17-year-old high school boy with a fascination for the Cthulhu Mythos.
  • Action Survivor: He's been in close contact with the denizens of the Cthulhu Mythos... and he's still not insane.
  • Adaptation Dye-Job: 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.
  • Ascended Fanboy: Though in this case it's an extremely mixed blessing.
  • Aww, Look! They Really Do Love Each Other:
    • 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 Imagine Spot of him and Nyarko getting married.
    • Likewise, when Nyarko confesses her feelings in front of her parents, Mahiro simply turns bright red instead of getting freaked out like usual.
  • Badass Normal: On the rare occasion that he gets to fight, he holds his own among cosmic horrors with nothing but a fork.
  • Beware the Nice Ones: He may seem to be a hapless boy, but push him too far — especially make fun of the Cthulhu Mythos — and he will stab you with a fork... whether you're human, animal or Lovecraftian.
  • Berserk Button: Never ever malign the Cthulhu Mythos.
  • Bishōnen: Handsome enough to have smitten Nyarko just with his photo, get "scouted" for a role in an alien 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.
  • Brutal Honesty: 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.
  • Cannot Spit It Out: 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?".
  • Can't Act Perverted Toward a Love Interest: In the wake of his body-swap with Nyarko he cannot even find the courage to look at the latter's naked body while taking a bath.
  • Catchphrase: He has a couple: "Wait, that makes no sense"note , "That was another stupid ending" and "Keep it to three lines"note 
  • Color Failure: The poor boy is prone to this, be it for failed SAN Meter checks or having his mom returning without warning.
  • Crazy-Prepared: 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".
  • Crossdressing Voices: Eri Kitamura is more used to younger girls and kids, not a boy in his mid-teens like him.
    • Averted (kind of) during Mahiro and Nyarko's "Freaky Friday" Flip and Kitamura gets to "play" Nyarko.
  • Cry Cute: A male example (albeit in Nyarko's body) when he thought Nyarko (in his own body) died 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.
  • Did You Just Punch Out Cthulhu?: He subdues Nyarlathotep with forks roughly Once an Episode.
  • Did You Just Romance Cthulhu?: 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.
  • Disappeared Dad: 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.
  • Domestic Abuse: His physical violence on Nyarko and Cuuko are treated as comedy.
  • Empowered Badass Normal: The novels later reveal an ability to perceive fluctuations in spacetime and a much higher than normal resistance to You Cannot Grasp the True Form. 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...
  • Even the Guys Want Him: Just ask Hasta.
  • Friend to All Children: His interactions with Guthatan, Hasta, and the 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.
  • Generation Xerox: He inherited his fork-wielding skills from his mother Yoriko.
  • Gratuitous English: Courtesy of episode nine's introduction. CLOSE. YOUR. EYES.
  • Improbable Aiming Skills: In episode 9 of Nyarko-San W, he hits a triple 300 on a dartboard...again, with forks.
  • Improbable Weapon User: When he has to, he fights with his trusty... fork.
  • Kid with the Leash: He does his best to keep Nyarko's, Cuuko's, and, sometimes, Hasta's antics under control.
  • Luminescent Blush:
    • Mahiro gets one after seeing Nyarko's panties, and also when he takes one of her advances seriously — sometimes Played for Laughs.
    • 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.
  • Megaton Punch: He punched Nyarko so hard that she was sent flying high in the sky, in episode 5 of season one.
  • Mr. Fanservice: In-Universe, he's a sexual god as far as the Lovecraftian deities are concerned.
  • Nice Guy: He is legitimately a good, caring persion; he just has a short temper when it comes to Nyarko and co.'s madcap antics.
  • Non-Action Guy: Not that he cannot hold himself in a fight, but when he has Eldritch Abominations chasing after him, he would be powerless without Nyarko, Cuuko and Hasta rushing into his defense.
  • Not So Above It All: 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 Big "NO!" 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.
  • Only Sane Man: What he is desperately trying to remain.
  • Opposites Attract: With Nyarko.
  • Ordinary High-School Student
  • Peek-a-Bangs: Has the shy version in almost all the light novel artwork by Koin.
  • Ripple Effect-Proof Memory: 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 Chekhov's Skill later when Nyarko and Cuuko get written out of existence and Mahiro is the only one who can save them. Considering the series' love of Kamen Rider, this may well be a Shout-Out to the concept of Singularity Points from Den-O.
  • Savvy Guy, Energetic Girl: Savvy Guy to Nyarko's Energetic Girl.
  • Second Year Protagonist: And he's seventeen. We know because Nyarko has No Sense of Personal Space.
  • So Beautiful, It's a Curse: To the viewers, he looks like an ordinary but still cute anime boy; to the aliens of the Cthulhu Mythos, he's apparently sex on legs, which means he's been scouted for a Boys' Love TV show, had a Yaoi Doujin written about him, and keeps having aliens fall in love with him.
  • Straight Man: With Nyarko, you would have to be.
  • 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. 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!"
  • Unfazed Everyman: 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.
  • Unwanted Harem
  • Visible Silence
  • Weirdness Magnet: Nyarlathotep the Crawling Chaos appearing in his life and declaring her undying love for him is just the start of his troubles, which includes dealings with time-traveling Moral Guardians, alien Animal Wrongs Groups, and being kidnapped so he can be auctioned off as the star of a Boys' Love TV show. Lampshaded in one episode where Nyarko remarks that something about Mahiro makes him "strangely attractive" to aliens.
  • We Want Our Jerk Back: In "How to Defeat a Kind Enemy", he makes Nyarko become a Magical Girl because he hopes it'll mellow her out; when this turns her outright Axe-Crazy, he admits that she was better the way she was.
  • Would Hit a Girl: With Nyarko around, it's either hit or get hit on. He usually chooses the former. He has also hit Cuuko as well, although not nearly as much as Nyarko.
  • Wrong Genre Savvy:
    • Mahiro has claimed to be Player Character in Call of Cthulhu, which makes him afraid Nyarko will turn out to be just like the Lovecraftian Nyarlathotep. If he realized he was in a Lovecraft Lite Rom Com 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.

Voiced by: Miyu Matsuki
Nyarko's old friend/lover/enemy who also comes down to Earth and the humanized version of Cthugha, the Burning One.
  • Abhorrent Admirer: How Nyarko sees her.
  • Action Girl
  • Attack Drones: Which look like a fusion of the Elmeth and Sazabi's respective attack drones.
  • Badass Adorable: 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.
  • Badass Bisexual: She is the humanized version of Cthugha, which gives her powerful fire powers. She also wants to marry both Nyarko and Mahiro.
  • Bi the Way: She eventually does fall for Mahiro. Mahiro isn't exactly thrilled, as one of the consequences of this is now Cuuko wants him to carry her (planned) child.
  • Bully Hunter: Back in space elementary school, she and Nyarko would rough up their classmate Nyogta for bullying Hasta; years later, he tries to get revenge by rewriting them out of history.
  • Childhood Marriage Promise: 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". Nobody questions how this is a valid marriage contract.
  • Clingy Jealous Girl
  • Creepy Monotone: Talks in a low, slow monotone, except when she talks to or about Nyarko.
  • Cry Cute: 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 Played for Laughs when she loses to Nyarko in card games and when Mahiro punishes her when she gets out of hand.
  • Curtains Match the Window: Sports red hair and matching eyes.
  • Deadpan Snarker: Except where Nyarko is concerned, at which time she enters fangirl mode.
  • Defrosting Ice Queen: Starts out as just Nyarko's Psycho Lesbian Stalker with a Crush determined to kill Mahiro. Since Mahiro was able to exploit her Psycho Lesbian 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 share her with Mahiro and comes to be a lot nicer to him.
  • Dude, She's Like, in a Coma!: Technically only a rejection-induced shock, but she still has no qualms whatsoever about undressing Nyarko.
  • Elemental Hair
  • Fiery Redhead: Literally — her human form uses flames as ribbons for her twintails.
  • Full-Frontal Assault: Her Cross Fire Sequence form can be seen as a Barbie Doll Anatomy version of this trope, as her "clothing" during it is either really good body paint or markings on her body.
  • Gamer Chick: One reason she quickly became friends with Yoriko.
  • Girlish Pigtails: Two really long ones.
  • Guilty Pleasure: 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".
  • Hair Decorations
  • Harem Seeker: After warming (pun not intended) to Mahiro, her plan changes from "marry Nyarko" to "I bear Nyarko's child, the boy bears mine". When he questions it, she responds by saying "My party system supports up to four characters."
  • Hey, You!: Tends to call Mahiro "Boy".
  • Humanoid Abomination: A living fireball disguised as a red-haired girl.
  • I Am Not Left-Handed: In her first fight against Nyarko, she reveals that she's able to use more Attack Drones than when last they met.
  • The Immodest Orgasm: Miyu Matsuki does an exceptionally loud, erotic cry in Episode 5 of W when Cuuko is being felt up by Cuune.
  • Incompatible Orientation: To Nyarko, for more than one reason... not that she cares.
  • Insane Troll Logic: 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.
  • I Want My Beloved to Be Happy: A small version occurs in episode 12 of Nyarko-san W. Cuuko, seeing how 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").
  • Laser-Guided Karma: Volume 6 of the light novels introduces her cousin, Cuune. She acts the exact same way Cuuko does towards Nyarko, except she's horny for Cuuko.
  • Lovable Sex Maniac
  • Mad Love: To Nyarko, she's nothing but her annoying, psychotic Stalker with a Crush, 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.
  • Matchmaker Crush: Wholeheartedly ships Mahiro/Hasta at first, because it means that she can have Nyarko for herself. Hasta runs with it, to both Mahiro and Nyarko's annoyance. This changes once Cuuko falls for Mahiro herself and changes her plan to marry both Nyarko and Mahiro.
  • Moe Anthropomorphism: Of Cthugha, the Burning One.
  • Murder the Hypotenuse: Briefly attempted this in her first appearance when she got annoyed with Nyarko's attachment to Mahiro, which 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.
  • New Job Episode: 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 her temper getting the best of her (fast food restaurant cashier).
    • Or in the case of the last one (gas station attendant), Mahiro outright says "You shouldn't be working here."
  • Nosebleed: In "How to Defeat a Kind Enemy", when Crawling Nyarko pulls her crowbar out from her skirt.
  • Otaku Surrogate: Of the general variety. During her first appearance she references Mobile Suit Gundam and The Big O, but this soon expands to video games and anime series, classic and contemporary alike.
  • Playing with Fire: Naturally.
  • Plucky Girl: Willing to go to some crazy lengths to get into Nyarko's skirt.
  • Psycho Lesbian: 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 very questionable reasons.
  • Punny Name: Her name sounds like Kuudere, and she's a pretty classic type 3. She's also undeniably cuckoo.
  • Rapunzel Hair
  • Red Eyes, Take Warning
  • Ret Gone: She and Nyarko get written out of existence by their old classmate Nyogta, but get restored by Mahiro and Yithka.
  • Romantic Fake–Real Turn: On her side, at least. In order to discourage Cuune, she has Mahiro fake a relationship with her, but falls for him for real.
  • Screw the Rules, I Have Connections!: 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 a few other reasons).
  • Shipper with an Agenda: She ships Mahiro with Hasta so she can have Nyarko for herself, although she later changes her plans about Mahiro.
  • Stalker Shrine: Her room is full of pictures and figures of Nyarko and a body pillow.
  • Stalker with a Crush
  • Sugar-and-Ice Personality: 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.
  • Super Mode: Her Cross Fire Sequence, AKA "the battle mode where it looks like she's just wearing body paint".
  • Trouser Space: 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.
  • Tsurime Eyes
  • Vapor Wear: When not in human attire she wears... paint.
  • Victoria's Secret Compartment: Despite having a smaller bust size than Nyarko.
  • Wrong Genre Savvy: 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 Event Flag with her; Mahiro plays along.
    Mahiro: "Don't worry about that. Should a flag come up, I would break it immediately."
  • Yandere: Nyarko likes a guy? She will char him for good.
  • Zettai Ryouiki: Grade A.

Voiced by: Rie Kugimiya, Tomokazu Seki (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 Rapine Storm version. He is also the son of the president of Carcosa Computer Entertainment (CCE), a famous video game developer.
  • Adorably Precocious Child: His overall appearance, although he also attends Mahiro's Boryo Municipal High School.
  • Ambiguously Bi: 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.
  • Badass Adorable: See this incredibly cute little boy? He can also hold himself in battle.
  • Badass Gay: He looks really girly and has an obvious crush on Mahiro, yet he holds himself in battle very well.
  • Beware the Nice Ones: He is the nicest guy in the cast, but he is also a capable fighter.
  • Blow You Away
  • Camp Gay: Less flamboyant than most examples, but fairly effeminate to fall into this trope rather than Straight Gay.
  • The Cutie
  • Dude Looks Like a Lady: With just looking at him at first glance, you would definitely mistake him for a girl. He dresses as a guy, at least.
  • Gay Option
  • Hair Antennae: A couple of cowlicks.
  • Hair of Gold, Heart of Gold: 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)
  • Humanoid Abomination: His most common Mythos depiction looks like a masked man, clothed in yellow rags, often with tentacles slipping through its hem.
  • Incompatible Orientation: He likes Mahiro a lot. As in the romantic variety.
  • Innocent Blue Eyes
  • In the Hood: Hastur, as the King, is often portrayed in artwork as being hooded. This is referenced visually by having Hasta wear a hoodie.
  • Long-Haired Pretty Boy: His long hair just makes him look even more like a girl.
  • Moe Anthropomorphism: Of Hastur, the Unspeakable.
  • The Mole: 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.
  • Nice Guy: So sweet, cuddly and good-natured is he that it's hard to believe he is voiced by none other than Rie Kugimiya, queen of Shana Clones.
  • No Sense of Direction
  • The Nose Knows: Has shown the ability to smell people from long distances.
  • Older Alter Ego: His Super Mode is much taller and much more mature sounding. They also talk to him like he and regular Hasta were different people.
  • Only Sane Man: Between Nyarko and Cuuko's squabbles, back in space grade school, he used to act as their middleman.
  • Pinky Swear: Hasta suggests it to seal Mahiro's promise to consider his love confession again... in 25 million years.
  • Scenery Censor: Happens in the Beach Episode of season 2 when the water constantly flows to censor his chest.
  • Spoiled Sweet
  • Student Council President: During his, Nyarko and Cuuko's space elementary school days.
  • Super Mode: His "King in Yellow Form", first seen in episode 3 of Nyarko-San W and voiced by Tomokazu Seki.
  • Tender Tears: Following the tradition of Rie Kugimiya's characters, poor kid leaves the cafeteria crying in Episode 7, thinking Nyarko is pregnant with Mahiro's child.
  • Token Mini-Moe: Of the main cast.
  • The Twink: Blonde, looks really young, positively gay for Mahiro.
  • Whole Costume Reference: The bandage-looking outfit he wears in "King in Yellow Form" is based on what T.M.Revolution wore in the music video and single cover for his song "Hot Limit".

Voiced by: Tomoko Kaneda (drama CD and first anime) and Satomi Arai (second and third anime)
Nyarko's pet, a female shantak (avian with horse's head and bat wings).

    Luhy Distone
Voiced by: Mariko Kouda
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 Cthulhu himself and the closest thing to the Big C to appear in the series to date.
  • Absolute Cleavage: Her business suit is really low cut and revealing.
  • An Ice Person: Uses ice attacks against some mooks during the final battle in Episode 12.
  • Big Damn Heroes: Pulls this in episode 12 to help everyone fight off Roy Fogger the Lloiger.
  • Cool Car: The Delorean. Yes, THE Delorean.
  • Eldritch Abomination: Her true form is, naturally, a pulpy green humanoid monstrosity with a tentacled head and wings. Contrast that with this smoking-hot lady.
  • Fallen-on-Hard-Times Job: From game console developer to takoyaki vendor and a Magical Girl actress... isn't it sad, Luhy?
  • Heel–Face Turn: After Episode 6, she bounces back from her Villainous Breakdown and tells everyone she has no hard feelings, and she even helps Mahiro escape the cursed dating sim in Episode 8.
  • Humiliation Conga: 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 Zombie Apocalypse game currently uploaded into the system... poor lady.
  • Hot for Student: Becomes a teacher for Mahiro's class, and certainly acts this way towards Hasta.
  • Hot Teacher: Becomes one late in the light novels.
  • Ma'am Shock: 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.
  • Magical Girl: She performs as one in one of her jobs.
  • Meganekko
  • Ms. Fanservice: Everything about her, from her glasses to her business suit, is attractive.
  • Moe Anthropomorphism: Of none other than Cthulhu.
  • Nice Girl: Post Heel–Face Turn, she is really one of the more consistently helpful and kindhearted characters in the series.
  • Nothing Personal: 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.
  • The Rival: She declares Mahiro one in the light novels after she realizes she has feelings for Hasta.
  • Villainous Breakdown: Played for Laughs in Episode 6. Upon learning that Cthulhu Corp. is ditching its gaming department, she stoops in defeat with Dull Eyes of Unhappiness before she breaks down Laughing Mad in a desperate attempt to complete Xoth-731 before her superiors pull the plug on the project once and for all.
  • You Gotta Have Blue Hair: Green hair in her case.

    Yoriko Yasaka
Voiced by: Kikuko Inoue (drama CD and first anime) and Aya Hisakawa (second anime)
Mahiro's mother and a part-time monster hunter.
  • Action Mom: Works as a part-time demon hunter (her introduction in Episode 4 even makes some Shout Outs to Monster Hunter).
  • Admiring the Abomination: 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.
  • Affectionate Nickname: Always calls Mahiro "Hiro-kun"; while pretending to be even fluffier during the Dating Sim episode, she went with "Mahiro-chan".
  • Alliterative Name
  • Ascended Fangirl: Just like her son, but unlike him she readily welcomes Nyarko, Cuuko and Hasta into their household.
  • Badass Adorable: In bright-and-sunny attitude and youthful appearance, Yoriko can easily be mistaken for for Mahiro's cute big sister.
  • Cuddle Bug: Frequently embraces her son upon returning from her adventures, supposedly to recharge her "sononium".
    • During the Trapped in TV Land 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.
  • Gamer Chick: Collector of consoles of all sorts.
  • Happily Married: 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).
  • Harem Nanny
  • Improbable Weapon User: Just like her son, she uses forks as her main weapon.
  • It Runs on Nonsensoleum: She claims that she needs to 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.
  • Mama Bear: 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.
  • More Dakka: Mahiro's fork = good. Yoriko's eight forks = better.
  • Mum Looks Like a Sister: Compare how she looks next to Mahiro and tell me that she doesn't look like she would possibly be his older sister.
  • Noodle Incident: 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.
  • Older Than She Looks: 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.
  • Overprotective Mom: 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.
  • Parental Incest: Not normally, but thanks to an alien love potion in episode 11 of Nyarko-San W, she starts leaning that way.
  • Shipper on Deck: 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 Heroic BSoD-inducing Brutal Honesty, then makes sure Cuuko and Hasta don't interfere.
  • Speaks Fluent Animal: She seems to be the only other character besides Nyarko that can understand what Shantak is saying.

    Tamao Kurei
Voiced by: Yoko Hikasa (Flash series) and Yuka Ootsubo (Anime series)
A classmate of Mahiro, Nyarko, Cuuko and Hasta, who is always on the prowl for the hottest news in school.

    Takehiko Yoichi
Voiced by: Yoshihisa Kawahara (Flash series) and Wataru Hatano (Anime series)
Mahiro's best friend and confidant.

Voiced by: Satomi Arai
A Yithian.

Voiced by: Wataru Hatano
A rogue Yithian and member of an extremist faction of Yithians who intend to pull off a massive Grand Theft Me upon humanity.

    Ato-ko Shirogane
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.
  • Aloof Dark-Haired Girl: Played with. She appears to be aloof, but is really a Covert Pervert.
  • Canon Immigrant:
    • In the original Mythos, Atlach-Nacha lacked any connotation of being promiscuous. Thanks to 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.
  • Cluster Bleep-Bomb: Her discussion with Cuuko is almost totally bleeped out. Whatever was said, it embarrasses even Cuuko.
  • Covert Pervert: 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 Hirasaka Hatsune in a kimono. Interestingly, Shirogane is the name of the antagonist in that Visual Novel.
  • 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 Love Potion, suggesting that she's attempting to set Mahiro and Nyarko up for her inevitable boyfriend-theft attempt.
  • Humanoid Abomination: Basically a Giant Spider with a quasi-human face.
  • The Internet Is for Porn: 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.
  • Moe Anthropomorphism: Of Atlach-Nacha.
  • My Sensors Indicate You Want to Tap That: 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.
  • Noodle Incident: 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.
  • Relationship Sabotage: This is more or less her hobby.
  • Weak, but Skilled: According to Nyarko, she's not amazingly powerful but is still a tough opponent because her attacks (webbing and poison) are hard to deal with.
  • Yamato Nadeshiko: Looks the part, but not the attitude.
  • Your Cheating Heart: 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.

Voiced by: Sayuri Hara
Another Nyarlathotepian and Nyarko's cousin. Appears in Remember my Love(craft-sensei).

Voiced by: Bin Shimada
A space smuggler who intended to abduct Mahiro as a subject of space Boys' Love Genre shows.

Voiced by: Daisuke Hirakawa (Flash series) and Takeshi Kusao (Anime series)
Nyarko's older, dumber brother.

Voiced by: Ryoka Yuzuki
Cuuko's cousin, who harbors a huge crush on her.

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.
  • Affectionate Parody: Of the Yaoi Fangirl archetype, including gladly referring to herself as "rotten" (an insulting nickname for yaoi fans, at least in Japan) and saying her favorite quote is "There's no such thing as a girl who doesn't like homos!"
  • All Women Are Lustful
  • Butt-Monkey: Her attempts to meet Mahiro are always thwarted in one way or another.
  • Loony Fan: 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 Boys' Love comic...
  • Meganekko
  • Moe Anthropomorphism: Of Ut'ulls-Hr'ehr, one of the Great Old Ones; one Japanese pronunciation of the name is "Uutsuru Heea" (ウーツル=ヘーア), from which "Tsuruko" comes.
  • Otaku Surrogate: She is obsessed with manga to the point of living on Earth and creating some herself.
  • Ship Tease: With Yoichi, who runs into her at least twice. The first time time is a Not What It Looks Like moment in episode 4 of season 2 caused by Isurugi, the second in episode 11 with him being under the influence of a Love Potion.
  • Yaoi Fan Girl: She is the artist for a yaoi doujinshi featuring Mahiro.

Alternative Title(s): Nyarko San


Example of: