Others
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P.O.R.K.
Voiced by: Teruyuki Tanzawa (leader)
A group of orcs who entered Japan illegally, taking a comic shop hostage to make ridiculous demands. They are handily defeated by MON, making their first introduction in the series.
- All Men Are Perverts: All of the orcs in PORK are men, and their demands are the printing of orc-centric pornography. Later on, another orc not a part of the initial group is shown arguing with a human over the superiority of orc-centric pornography over tentacle monster-centric pornography. PORK's leader reveals himself to be a pedophile when he molests Draco and threatens to rape Doppel-as-Lillith.
- Attempted Rape: The orcs intended to rape one of their hostages in front of the police. Sadly for them, the "hostage" turned out to be Doppel. In chapter 40 the leader makes a return and assaults Draco, but is stopped again by Doppel using what is implied to be her true form.
- Fun with Acronyms: In the official English release, they call themselves the "Pioneer Orc Renaissance Kinsmen" or PORK for short.
- Go Mad from the Revelation: The Orc Leader fails his sanity check after being confronted by Doppel and is left all-but comatose by the sight of her monstrous transformation.
- Knight of Cerebus: The threat is resolved within a chapter, though they are gun-toting terrorists responsible for an Out-of-Genre Experience.
- Loophole Abuse: Using the cultural exchange laws, the orcs can perform their terrorist actions without fear of being attacked by the human police force. Eventually defied by Ms. Smith - when the orc leader tells her to accompany him in the deportation that would be his maximum legal punishment, she has Doppel provide her an alibi while she takes out her frustration on him.
- Madness Mantra: When the orc leader sees Doppel's transformation, all he says afterwards is "little girls scary".
- The Nose Knows: Orcs have an incredible sense of smell, they can smell anything within a kilometer radius.
- Not-So-Harmless Villain: The orcs are idiots, yes, however their leader does mercilessly gun down a special forces agent who tried to sneak in, and attempted to rape a hostage in front of the police force.
- Oh, Crap!: The orc leader, when Ms. Smith gets ready to really punish him. He has another moment when Doppel transforms into an eldritch horror, destroying his sanity.
- Our Orcs Are Different: They straddle the line between Tolkien and Blizzard orcs. They have human-level intelligence and a high level of cunning, capable of using firearms. Though they violently take hostages and are mostly concerned with their own lusts.. They are also piglike in appearance like old school D & D orcs. Chapter 84 introduces some friendly, courteous orcs who remark that orcs like the leader of P.O.R.K. give them all a bad name.
- Pædo Hunt: The leader of the orc pack openly admits to preferring young girls when assaulting Draco, and is such a pervert that he abandons Draco to chase after the child-sized Lilith and makes it clear he intends to rape her. Lilith turns out to be Doppel in disguise, and she proceeds to Scare 'Em Straight.
Polt
Voiced by: Shiina Natsukawa (Japanese), Christina Kelly (English)
A kobold who runs a fitness center for extraspecies, and the first non-government monster girl to NOT be added to the harem.
- Beast Man: Though she initially appears to just be a Little Bit Beastly, her character profile reveals that she's actually completely covered in fur, head to toe. It just grows thicker on her head, wrists and ankles.
- Bizarre Alien Biology: She has four more pairs of nipples on her abdomen, beneath her fur, much like an actual dog. Her profile notes that some kobold subspecies even develop a second pair of full breasts.
- Cool and Unusual Punishment: It's revealed that one of her side jobs is disciplining extraspecies who break the rules (like running off without their host family). Her choice of punishment is to force them to walk an entire marathon!note
- Demoted to Extra: The anime adaptation skips her introductory chapter entirely and cuts out her contribution to Kurusu's food worries, instead giving her brief, unvoiced cameos during episodes 10 and 11. It got a little better with the OVA, which was an extended adaptation of the cut introductory chapter.
- Genki Girl: Polt seems to have near-infinite reserves of energy.
- Happily Married: Chapter 64 reveals that she'd gotten married to a man who looks suspiciously like PoltFan, a real-life fan translator who had been unofficially translating the manga to English.
- Hidden Depths: Despite being a happy-go-lucky genki girl, Chapter 41 reveals she has some insecurities about what people think of her, and worries she is The Friend Nobody Likes.
- Innocent Fanservice Girl: She's been leaning in this direction lately. In Chapter 43 she gets ogled when she leans down, exposing a healthy amount of her cleavage, and in Chapter 48 her demonstration of the kobold centaur riding machine ends with her whole body sweating.
- Inconsistent Spelling: Volume 4 of the English release originally had her name as "Port".
- Large Ham: She likes to shout. A lot.
- Living Lie Detector: A side effect of her potent sense of smell, she can pick up pheromones when someone is stressed or exhausted. And as Draco and Lilith found out, she can tell when they're just acting tired to try to get out of walking a marathon.
- Male Gaze: One panel in Chapter 17 seems veeeery focused on her tail, and the hole her swimsuit has for it. And Mero's inability to stretch.
- No Indoor Voice: It's rare to hear her not yelling at the top of her lungs.
- Non-Idle Rich: She (and kobolds in general) are financially well off due to her species' association with mining cobalt. She owns and manages both the Sports Club Kobold and Kobold Stadium, as well as a number of spas, massage parlors, and relaxation centers.
- Our Kobolds Are Different: She's a kobold of the dog-like variety often seen in Japanese media.
- Perpetual Smiler: The only time she isn't smiling is when she's surprised.
- Real Life Writes the Plot: As of chapter 64, she is married to PoltFan. Who is based on the real-life english translator for the manga.
- Reasonable Authority Figure: She is genuinely concerned with how the fitness center will be received and when issues are brought up, such as Mero not handling the chlorinated water in the pool well or the temperature being too cold for Miia, she says she will make sure they will be fixed when the place opens to the public.
- Skinship Grope: Does this to Kii in an effort to "extract water from plants" after Kii drank all the water that Polt had prepared for herself, Draco, and Lilith.
- Token Wholesome: She's up there with Lala and Manako on this. Outside of the Male Gaze entry described above (and an image of her naked and covering her breasts in an omake), she's one of the very few female characters that hasn't had any fanservice moments.
- When Kii tries bondage on her in chapter 41 it is less graphic than with other girls and Polt mistakes it for a new type of sports training. Even when shown naked in the same chapter, it's from a distance where nothing is seen and is mostly a background detail.
- Her wholesomeness is tested even further in chapter 43 where her customers ogle her breasts when she leans over for a warm up (she wears no bra), but of course Polt does this with no sexual intentions.
- Chapter 48 gets even closer to throwing any sense of wholesomeness when Polt demonstrates how the Kobold's new centaur riding machine works.
- Said image from the omake with her naked is reused in the first OAD as an eyecatch, but this time her nipples are in full view, since the OAD doesn't need to be censored for broadcast.
Draco
Voiced by: Airi Ootsu (Japanese), Rachel Landon (English)
A dragonewt with a creepy crush on Miia.
- A-Cup Angst: Her profile reveals that most dragonewts have large breasts, something Draco — who has a B-cup — is clearly lacking.note She's shown with an embarrassed look on her face as she tries to claim that she's not small, everyone else is too big.
- Adaptational Badass: Kind of. Unlike in the Manga, she does have the ability to fly in the anime...for all the good it does her: Mon shoots her escape attempt down with ease judging by the holes in her wings, and one blast of Suu's poisoned spray ends their fight before it even starts.
- Awesome, but Impractical: As stated below, Draco's got a bad case of this. She's got scales that can block bullets! But her clothing usually catches on them, and she doesn't run into gun-wielding maniacs too often. She's got an extremely muscular tail! But she can't sleep on her back and she needs specialized clothing. She's got wings! But they're not strong enough for her to do more than glide, she has to deal with a lot of air resistance when trying to run and again, they get in the way.
- Bifauxnen: To the point that everyone thinks Draco is a man at first. Downplayed after the truth comes out: her appearance in Chapter 25 is far more clearly feminine.
- Butch Lesbian: She's quite obsessed with Miia and she's so masculine that everyone mistook her for a man. In chapter 40, she also tries to hit on the lizardwoman Liz, only to be promptly shut down.
- Butt-Monkey:
- Her profile following Chapter 25 is pretty blunt about it. Her wings and chest muscles aren't actually strong enough to let her fly, her armored scales are actually rather useless in everyday life and interfere with her ability to put on clothes, and her tail detaches if pulled. (Apparently that's somewhat shameful and associated with "lower" reptiles.)
- Chapter 40 shows that she's approaching Meg Griffin levels: in this chapter alone she is about to get molested by an orc, is reprimanded by Liz (of all people), and almost gets to make peace with Miia until, because of a misunderstanding, is again rejected and chased away. Makes one almost feel sorry for her.
- And again in Chapter 48, when at the Liminal Convention she tries to lure Miia into a special heated room display exclusively for reptilian species. She is of course rejected. Then she learns that her entrance to the room was conditional on her posing for a crowd in a swimsuit to show off the room's heating because she didn't Read the Fine Print, and has moments to change into a swimsuit before the electric frosted glass clears. Only it turns out the staff mistook her gender and only provided her a pair of swim trunks to change into. Which she doesn't even manage to get on in time. Cue the glass clearing after she'd stripped...
- Curb-Stomp Battle: Ends up on the receiving end by Suu when she tried to exact revenge on Kimihito for having foiled her attempt at having Miia for herself. Suu ended the battle before it even started.
- Does Not Like Men: She outright states she hates men. In spite of this, however, she's initially seen pretending to be one, acting like the douchiest stereotype of them imaginable, and expecting girls to like her for it.
- Double Standard: Rape, Female on Female: After she's revealed to be a girl, her assault on Miia is more or less forgotten and she's treated mostly as comic relief from then on.
- Draconic Humanoid: Draco has dragon wings and a tail.
- Fantastic Arousal: As Suu discovers, the tip of her tail is sensitive just like Miia's.
- Fantastic Racism: Initially appears to have a case of this, though it's eventually revealed she doesn't like men rather than humans in general. In fact, in one omake she's shown requesting to have a cute girl as her host, suggesting she has no problems with humans, provided they're female. She also seems to think reptilian liminals are superior to everyone else.
- Foreshadowing:
- Well before The Reveal, Draco orders Miia to stop talking about men, not humans, foreshadowing her Psycho Lesbian status.
- There's also one on the chapter's cover page which reveals Draco's species' name and family's coat of arms.
- I Just Want to Have Friends: Although she has a pretty strange way of showing it. She seems to be getting better however, as she's trying to just normally visit Miia at the house by Chapter 34. Unfortunately, no one was home at the time. She seems to horn in on any reptilian extraspecies in general: she starts hitting on Liz as soon as she learns that she's a lizardman.
- Inconsistent Spelling: The official English release initially used Drago, before switching in the next volume.
- Knight of Cerebus: Remember how Rachnera could have been the manga's first villain? Well, she missed out on that, and Draco got the title instead. She was very close to forcing herself on Miia, and would have had her way if not for Kimihito and Mero being Big Damn Heroes.
- Laser-Guided Karma: Stalks Miia all the way to the Lamia village (brief cameo at the end of Chapter 62), formally announces her arrival in Chapter 63, and is stripped and sexually assaulted within two pages.
- No Social Skills: When Draco actually tries to be civil, it's apparent that her social skills are very lacking. She has a hard time apologizing not because she doesn't want to, but because she doesn't know how to apologize.
- Our Dragons Are Different: This dragon is a Winged Humanoid with draconic wings and a tail.
- Politically Incorrect Villain: On three levels; she thinks women are better than men, liminals are better than humans and reptilian liminals are better than other types.
- Psycho Lesbian: She tries to force herself onto Miia. A bonus omake with her and the other side girls indicates she actually doesn't like being called a lesbian, though the official English Translation clarifies that she was actually indignant about Lilith's foul mouth, and suggestion she suck on Kii's breasts in public.
- Red Herring: While the initial assumption was probably the same as Miia's, Draco is NOT the one who sent Kimihito the death threat. She doesn't know anything about it and even if she did she is only interested in Miia.
- Slasher Smile: She's probably sporting the scariest one thus far in the series
◊. And that's including Rachnera's Nightmare Face. - Smug Snake: Draco certainly believes in draconic superiority. Though it turns out that being a dragonewt is nowhere near as great as it sounds. See Awesome, but Impractical and Butt-Monkey above.
- Stalker with a Crush: Draco is introduced stalking Miia from the shadows.
- Take That!: Draco is less than pleased when Miia can't stop being infatuated over Darling despite the fact that Miia felt left out at the aquarium.Draco: What's so great about that human anyway...? He's acting like the idiot main character in some harem-style light novel!
- Tomboyish Name: "Draco" is typically masculine. Then again, so is this Draco.
- Villain Decay: In her first appearance she almost has her way with Miia and would have succeded if not for Kimihito and Mero. In her next appearance she appears out of nowhere and attempts to attack Kimihito...and is promptly molested by Suu and dealt with. And then in a bonus omake she's being forced to walk an entire marathon (42 kilometers!) by Polt as punishment for going out without her host family. When she's shown up after that, she hasn't even been trying to do anything villainous.
- Why Did It Have to Be Snakes?: She's creeped out by fish, of all things, as seen in Chapter 25.
- Winged Humanoid: Draco's wings are the bat-like ones usually seen on dragons.
- Wings Do Nothing: Her wings are only capable of gliding at best, and their shape and size cause wind resistance that slows down her running. The anime shows she can lift off the ground and glide, but she still can't actually fly.
- Your Size May Vary:
- Her wings can vary in size sometimes, most notably in her debut where they look like they're big enough to enable flight.
- Her tail too, seems to be as long as needed. In Chapter 19, it's long enough to wrap around to her front, with enough left over to bind Miia's wrists. It has also been depicted as being just barely long enough to brush the ground in Chapter 40.
Kii
Voiced by: Asami Seto (Japanese), Tiffany Terrell (English)
A dryad whom Papi befriended before she met Kimihito. However, illegally dumped chemicals have transformed her into a rampaging monster, who Papi (and by extension, Kimihito) have to stop.
- Adaptational Modesty: The anime adaptation gives her bark covering for her crotch.
- Attack of the 50-Foot Whatever: Turns into a giant, mobile tree and attacks the first people she encounters.
- Bondage Is Bad: Ties Papi up tortoise-shell style with vines and tightens them until she orgasms.
- Combat Tentacles: Uses vines to grab onto people and wrap them up BSDM style.
- Cool Chair: She has a throne made of roots that can move by itself.
- Forgotten Friend, New Foe: Comes across as such at first due to having been driven crazy by the chemicals she was exposed to, and Papi having completely forgotten about her.
- Freudian Excuse: Her hatred of humans stems from her kidnapping by extraspecies traffickers and being left behind by Ms. Smith when the traffickers were apprehended.
- Godiva Hair: Her vine-like hair covers her nipples in some scenes, but not all of them.
- Humans Are the Real Monsters: Dislikes humans in general, though she admits that Kimihito has good technique.
- Idiot Hair: A big, leafy one.
- Immodest Orgasm: When Papi and Kimihito suck the fertilizer out through her breasts, she has one.
- One-Winged Angel: After absorbing experimental fertilizer for several months, she transforms into a massive plant monster.
- Perpetual Frowner: Sne always has a bored and/or annoyed look on her face.
- Plant Hair: Her hair is made of leaves.
- Plant Person: She's a dryad, who looks mostly human with plant features such as leaves and vines for hair and bark covering her arms and legs.
- Plot-Relevant Age-Up: Originally looks like a child, but after absorbing experimental fertilizer, she gains a body of a busty adult (which happens to be inside a giant tree monster body). She gains this form naturally when she's met again in Chapter 25, and supplementary materials have since revealed that her apparent age is heavily tied to her nutritional intake: she looks older when she's healthier and younger when she's starving.
- Psycho Serum: Absorbed experimental fertilizer, which had a number of effects on her.
- Punny Name: Ki is the Japanese word for tree/wood. Granted, it's probably not her real name, since Papi made it up for her.
- Sexier Alter Ego: Like Suu, Kii can assume a more... adult-looking form when well-fed.
- Shout-Out: Her One-Winged Angel appears to be one to the forest god from Hellboy II: The Golden Army.
- Superhuman Trafficking: Was the victim of this, which is the reason she dislikes humans.
- Stripperiffic: Doesn't wear any clothes, aside from some bark-like covering on her neck and chest... which leaves her breasts exposed.
- Yandere: Comes across as such for Papi, though it's not her fault.
Lilith
Voiced by: Atsumi Tanezaki (Japanese), Hilary Haag (English)
A mischievous devil who decides to cause some trouble to Kimihito and Centorea's date for her own amusement.
- Attempted Rape: When her hypnotism fails to cause Kimihito to assasult her, Lilith tries to force herself on him. Fortunately, she is stopped by Doppel.
- Black Eyes of Crazy: Like Doppel she has black sclera, but she seems more mischievous than malicious or insane.
- Blackmail: Her scheme in Chapter 40 is to hypnotize Kimihito to trick Rachnera into thinking that "Honey" got infatuated with her, thus making her leave Kimihito's house and try to get together with her when she goes all alone in the world. Kimihito and Doppel quickly put a stop to that.
- Breaking Speech: Tries this on Rachnera by pointing out how she is insecure and fearful about humans accepting her and hides in the shadows to avoid being seen. See below for the response.
- Bullying a Dragon: She spent most of the chapter she first appeared in being a Troll to Centorea and Manako by playing on their insecurities. She then tries the same with Rachnera... and that's the last we see of here before Rachnera reduces her to a sub.
- Casual Kink: Really enjoys bondage and refers to Rachnera as "Mistress".
- Does Not Like Men: She believes that all men are lolicons.
- Evil Laugh: Written in English as "Ki hi hi!"
- Fille Fatale: In Chapter 40 she tries to seduce Kimihito in order to get dirty pictures to show to Rachnee, enabling her to get her "Mistress" all to herself.
- Hades Shaded: She's a demon and she's dark-skinned.
- Horned Humanoid: Comes with being a demon.
- Hypnotic Eyes: Causes Centorea to develop these.
- In the Hood: Wears a hoodie to hide her horns. The bagginess of the hoodie also helps to hide her tail and wings, with a pair of zippers in the back to let the wings out if she needs them.
- Ironically, the hood itself has horns. However, since they are clearly part of the hood, it still serves to hide the fact that Lilith has horns of her own.
- It Amused Me: Her modus operandi.
- Karma Houdini: Chapter 40 shows that she hasn't changed her ways, and again she gets saved from serious troubles only to disappear and get away scot-free from what she'd done. The only time she was properly punished, she turned out to be Too Kinky to Torture.
- Kick the Dog: She could have hypnotized Manako to be rid of her, instead she simply exploits her insecurity about her eye by pretending to be a child traumatized by the eye.
- Mind Manipulation: She can hypnotize people to lower their inhibitions, and tries to get Centorea to rape Kimihito as a prank.
- Older Than She Looks: Like Papi she is an adult but has the body of a small child. Her profile notes that she enjoys abusing this in petty ways to get into movie theaters and buses while paying only child prices. This backfires on her big time when she tries picking a fight with Rachnera, who notes that she's an adult in a childlike body and therefore can be "punished" as an adult.
- The anime end-card for Episode 12 reveals that this is because she belongs to the Lesser Devil subspecies, who are noted to look like children.
- Our Demons Are Different: She's a devil, but the only supernatural powers she seems to possess are hypnotism.
- Outside-Context Problem: Unlike the other one-off villains so far, Lilith has no real motive beyond causing mischief for her own amusement, though she does gain a motive later on in trying to get back with Rachnera.
- The Prankster: Continuously pranks Centorea and Kimihito throughout Chapter 21, undergoing Serial Escalation until she brainwashes Centorea into trying to rape Kimihito. It bites her in the ass when she presses Rachnera's Berserk Button.
- Psycho Lesbian: She greatly enjoys being tied up and "tortured" by Rachnera to the point where she was begging to be "rewarded". In Chapter 34, she's seen deliberately looking for Rachnera and is upset that they haven't met up again since their first (and so far last) "encounter". Considering Rachnera has no actual affection for her, having only used bondage on her to get her to reveal if she was a threat to Kimihito (and hasn't met with or even mentioned her since then), it's pretty obvious her ambition is futile. In chapter 40 she tries to seduce Kimihito, believing that if he betrays Rachnera then she'll be willing to be with her instead, but this plan fails quite spectacularly (though she does get the opportunity to get tied up again by who she thinks is Rachnera, i.e. Doppel disguised as her).
- Sexy Coat Flashing: She's wearing a coat, underwear, and not much else.
- Too Kinky to Torture: Judging by the last page in chapter 21 she really enjoys bondage (although played with in that said bondage turned her into Rachnera's quivering sub).
- The Unfought:
- Played with. Centorea misunderstands the nature of her "hypnosis," and Kimihito never even learns she existed, but Rachnera catches her and settles her good.
- In Chapter 40 she and Kimihito finally get face-to-face (and face to... other body parts). He's immune to her suggestive poses, and when she tries hypnotizing him, he ends up acting exactly the same way he already was, just a bit more critical of her.
- Villain Decay: Happens to her even faster than it did Draco. Between Rachnera turning her into a quivering sub and Polt punishing her for going out without her host family, whatever threat she once posed is long gone. When she next tries a scheme it doesn't even get off the ground as her hypnotism can't awaken any hidden lust for her as Kimihito has none for her, lowering his inhibitions only causing him to speak out on how he dislikes the way she is behaving.
- What Happened to the Mouse?:
- She's apparently been forgotten about/disappeared after Chapter 21 as she wasn't seen inside the attic in newer chapters. This is averted by the bonus material in volume 5 revealing she was released by Rachnera and subsequently punished for going out without permission/unaccompanied by having to run a marathon.
- She shows up again in the main story in Chapter 34, distressed at the thought Rachnera might have abandoned her as she hasn't seen her even once since her debut chapter.
- Part of Chapter 40 is dedicated to her. She's still as mischievous and infatuated with Rachnera as ever, all to no avail.
- Winged Humanoid: Has small bat-like wings.
- Wings Do Nothing: She can't fly with her wings, hence why she ran away from the wild boar instead of flying.
Yukio
A yuki-onna running an onsen resort.
- Acquired Poison Immunity: Is using slow, constant exposure to the springs she works in as a method of training her body to better withstand her natural weakness to heated temperatures.
- Amazing Technicolor Population: She's one of the less monstrous girls in the series, looking much like a human with blue skin, snow white hair, no pupils and a shapeshifting ornament of ice constantly somewhere in her hair.
- Crazy-Prepared: She is really thorough when it comes to designing her resort, having accommodations for practically every monster girl imaginable. May apply to her lover just as much though, since he designed much of it.
- Early-Bird Cameo: First appeared in a 4koma on Okayado's twitter.
- Emotional Powers: She loses control of her ice powers when she loses her stoic expression.
- Face of a Thug: Her cold demeanor and lack of smile has scared off numerous customers.
- Frozen Face: She's trying to learn how to smile for the customers, but she has a hard time at it.
- An Ice Person: As befitting a yuki-onna, though she has many difficulties running a hot-springs resort because of her powers.
- Impossibly-Low Neckline: She wears her kimono somewhat loose, leaving an off-the-shoulder neckline. Though it works since she has an obi sash to hold the dress.
- Interspecies Romance: Surprising no one, she's dating the human future heir of the resort.
- Kryptonite-Proof Suit: Wears a special suit to maintain the springs despite their heat.
- A Lizard Named "Liz": A yuki-onna named Yukio.
- Personality Powers: Subverted. She isn't really "cold" so much as she just has difficulty expressing herself.
- Relationship Upgrade: Revealed in an omake that she is now engaged to her boyfriend.
- Signature Hair Decs: Her hair is done up using a hairclip created from her own ice, resembling a snowflake that changes everyday due to her cold aura.
- Single Woman Seeks Good Man: She is completely in love with her boyfriend because he's kind, considerate and has a cheerful smile.
- The Stoic: It's a problem she's had to work on, since her cold demeanor is scaring off customers.
- Sugar-and-Ice Personality: Though she's usually quite controlled, she melts when thinking about her boyfriend or when embarrassed by displays of emotion.
- Surprisingly Realistic Outcome: The mixed bathing ended up being so successful that many of her patrons became couples and often return to her resort for weekend getaways and the like. The trouble is, many of the extra-species have little inhibition (if any at all) either due to a species-wide trait or sheer desperation to ensure future generations of their species, and frequently try to have sex in the pools, regardless of whether or not there’s an audience. As a result, Yuki’s been having difficulties in enforcing her own rules, and after receiving numerous complaints, she’s afraid she’ll soon start losing customers. She solves this by hiring bouncers of a sort to help monitor the behavior of patrons.
- Symbol Motif Clothing: As befitting of a yuki-onna, Yukio wears a kimono adorned with snowflakes.
- When She Smiles: When talking about her beloved young master, she unconsciously smiles which Kimihito notes. However, this causes Yukio to lose control of her composure and nearly freeze Kimihito.
- Youkai: Yukio is a yuki-onna, a Japanese ice monster.
Ils Nineta (Luz Ninetei)
A nine-tailed fox in the exchange program, working at a shrine as a miko.
- Antiquated Linguistics: She talks like an old lady, despite looking around ten.
- Asian Fox Spirit: Nine tails and all.
- Dub Name Change: Seven Seas Entertainment tweaked her name a little to keep the pun intact.
- Evil Laugh: Is apparently good enough at this that Kimihito, Miia and Rachnee wonder if she shouldn't be playing the villain rather than the magical girl.
- Inconsistent Spelling: Is it Luz, Ruz or Liz? The official English translation is Ils Nineta.
- Magical Girl: Complete with live-action Transformation Sequence on stage, thanks to Rachnera.
- Miko: Works as a shrine maiden.
- One-Steve Limit: The initial scanlation had her first name as Liz. However, with the reveal of Liz the lizardman in chapter 34, the scanlators quickly changed her name to Luz.
- Only in It for the Money: She's enthusiastic about using the shrine as a theatre ground if it gets people there. Actual religious business has been a little slow lately.
- Our Nudity Is Different: She isn't the least bit embarrassed that a whole crowd of people saw her completely naked, since she was transformed at the time. So it wasn't really "her".
- Pragmatic Hero: She cares about the shrine just as much as her host does, but unlike him she doesn't consider...advertising...dishonorable.
- Punny Name: Ils Nineta, the nine-tailed fox. Nineta-ils, get it?
- Sexier Alter Ego: When playing a magical girl.
- Shapeshifting Trickster: Although she's unwilling to outright break the law.
- Trademark Favorite Food: Inari sushi.
- Voluntary Shapeshifting: Like all nine-tailed foxes, Ils can change herself into anything using her tails - but it doesn't extend to her clothes.
Liz
A bodyguard working for the Talio Private Security Company to deal with extraspecies threats.
- Ambiguously Gay / Ambiguously Bi: She seemed quite receptive towards Draco after being given flowers and a teddy bear by her, or at least apolegetic for her earlier animosity. Although many people do mistake Draco for a male at first glance.
- Animal Eyes: She has slitted pupils.
- Bifauxnen: Much like Draco, Liz has a noticeably boyish appearance, which goes hand-in-hand with her outfit.
- Consummate Professional: Liz takes her job as a bodyguard very seriously, and does not react well to interferences.
- Cute Little Fangs: Most noticable when she's shouting.
- Dangerous Forbidden Technique: Since lizards store nutrients in their tail, she risks dying of malnutrition if she cuts her tail off. Kimihito stops her from doing that upon hearing this.
- Death Glare: When Draco hits on her, Liz intimidates the dragonewt with a menacing glare, bared fangs, and Hellish Pupils.
- The Ditz: She berates Kinu for being stupid, but she's not much better off herself.
- Drives Like Crazy: She keeps forgetting one of the most basic rules of driving: keep your eyes on the road.
- It Only Works Once: Stated word-for-word in her profile about her tail-detachment comment. Her tail would grow back, but with cartilage instead of bone and lacking the internal structure to readily detach again.
- Lizard Folk: She's a lizardman. Draco initially mistakes her for a dragonewt.
- A Lizard Named "Liz": Literally.
- One-Steve Limit: The scanlators had initially intended to use Liz as the name for the kitsune in chapter 32. However, after the reveal of this Liz in chapter 34, it was quickly changed to Luz.
- When All You Have Is a Hammer…: You're being chased? Clearly the best thing to do is to cut off your tail and run.
Kinu
A bodyguard oni working for the Talio Private Security Company to deal with extraspecies threats.
- Amazing Technicolor Population: She's a Red oni: in fitting with the myths, she's cheery, energetic and somewhat dumb.
- Cute Little Fangs: Adding to her adorable nature.
- The Ditz: She's not overly bright.
- Horned Humanoid: Two of them, unlike Tionishia's one.
- Squirrels in My Pants: Bug in your suit? Take it off!
- Statuesque Stunner: She's a bit smaller than Tio (but still rather tall, at 192cm).
- Youkai: She's an Oni, an ogre subspecies.
Sebasstian & Flounnder (Potemkin)
A pair of fishmen looking to secure the safe return of a certain VIP.
- Aerith and Bob: Sebasstian is quite the common name, but Flounnder? Not so much.
- Batman Can Breathe in Space: Both are literal fish out of water. If they're anything like Mero, they too can likely breathe on land so long as their gills are damp.
- Bitch in Sheep's Clothing: While they initially seem like faithful servants to Mero, it's later shown that they're quite selfish.
- Whenever something goes wrong, their first concern is what will happen to them, even if someone's life could be in danger.
- Instead of contacting the authorities to rescue Mero from Octo, they have Kimihito and the girls save her instead because they fear they'll lose their jobs if people find out they knew where Octo was because they tried to ask her for a favor.
- Dirty Coward: Rather than accompany Kimihito and the others on their rescue mission, they instead drop them off on the island and drive their boat away.
- Dub Name Change: To prevent a case of Lost in Translation, Potemkin was changed to Flounnder as a reference to The Little Mermaid instead.
- Fish People: They look like fish with arms and legs attached (they even still have a tail!). In other words, reverse mermen. They know where Octo lives, because they wanted her to turn them into handsome mermen instead.
- Lost in Translation: Their Japanese names are actually puns on the fish-species they resemble. The English version calls them Sebasstian and Flounnder instead.
- No Cartoon Fish: Look at the picture.
- Poor Communication Kills: Semi-justified. They send a bunch of untrained amateurs after Octo instead of MON commandos because they don't want to lose their jobs on account of once trying to bargain with her. Not telling them about the giant sea anemones that live in the cave though... that's just them being lax.
- Shout-Out: Their English names are a clear reference to The Little Mermaid.
- Those Two Guys: "Those Two Fishes" is a much more accurate description, but it gets the job done.
Octo
A scylla, described as a villain and deceiver of mermaids by Sebasstian.
- Animal Eyes: She has octopus pupils.
- Astonishingly Appropriate Appearance: Her hood looks like an octopus head, and the buckles around her collar look like octopus eyes. Combined with her tentacles, they give her the appearance of a giant octopus, especially when shown as a silhouette.
- Breaking the Fourth Wall: Or even the fifth. In one omake she lends one of her skimpy bikinis to Manako, who is enormously flustered. Octo then asks her why she's embarassed, since she appears naked in every episode of the anime during the ending sequence! For that matter, Manako says that the anime producers didn't ask her permission to put these images in the ending...
- Carnivore Confusion: She cooks takoyaki, octopus dumplings, in her shop. Then again, octopi are notable for eating members of their own species anyway.
- Expy: A half-octopus being described as a 'villain' and 'deceiver'? She's like a thinner, prettier Ursula. It fits quite well, considering Mero's obsession with the fairy tale. Ultimately subverted as she's a perfectly friendly woman with no magical powers at all.
- Fantastic Racism: She's been accosted by countless mermaids and mermen seeking magical assistance, had malicious rumors spread about her when she was unable to help, and then made a scapegoat for the Mermaid queen's plot purely because she's a scylla.
- Friendly Rivalry: With Rachnera. They hit it off after using their various means of constriction to duel.
- In the Hood: She wears a hood that resembles an octopus's head.
- Inconsistent Spelling: Oct or Octo.
- Let's Get Dangerous!: Inverted. She initially presents herself as a serious threat when her pet anemones very quickly incapacitate Cerea and Miia, and she essentially fights Rachnera to a draw, all while holding Kimihito hostage and threatening to rape him if Rachnera stops fighting to go look for Mero. She later displays a much more laid-back and goofy personality once it's cleared up that Kimihito and company are merely worried about their friend, not assassins sent by the mermaid kingdom.
- A Lizard Named "Liz": Octo, from octopus.
- Lovable Sex Maniac: Had her tentacles down Kimihito's pants literally seconds after meeting him. This was mainly done to get Rachnera to let down her guard, but her subsequent fondling of Kimihito and offer of a "reward" was certainly genuine.
- Not Evil, Just Misunderstood: She's not the evil witch we're initially lead to believe she is. She's actually a nice person and she can't even use magic; she was merely framed through rumors by the queen. Her "kidnapping" of Mero was also a big misunderstanding.
- Oblivious to Love: In an omake from volume 16, there's a human that repeatedly approaches her for love advice about a scylla that can't seem to notice his feelings at all.Octo: "Man, ya just gotta go all out and tell her how ya feel! Go get her tiger!!"
- Prehensile Hair: She has tentacles instead of hair that she uses as an extra pair of hands.
- Red Herring: She's set up as a serious villain and the source of many problems in the mermaid kingdom, but she's an innocent scapegoat for a larger scheme by Mero's mother.
- The Scapegoat: She has been framed as an evil witch who deceives mermaids as part of a scheme by the queen.
- Solitary Sorceress: People seeking magical solutions to their, often trivial, problems have forced her to isolate herself. Mostly because she can't do any magic to begin with. Funnily enough she later decides to take what she learned giving such people advice by going to the Arctic Inn to offer her services as a couples counselor to make some money.
- Southern Belle: Octo has a very pronounced southern accent in the English print of the manga.
- Tentacle Hair: She has eight tentacles growing from her head to match the eight on her lower body, and they are just as dexterous. She often wears a hood that leaves only the two longest tentacles exposed.
- Unscaled Merfolk: Unlike Mero, Octo is a scylla; in place of a fish tail, she has octopus tentacles.
Shiishii
A jiangshi looking for a Japanese man to marry.
- All Chinese People Know Kung-Fu: Practices tai chi everyday to keep rigor mortis from setting in...though Zombina called her out on how closely she holds to that schedule.
- Attractive Zombie: Has a slender, athletic build and her appearances give a lot of focus to her backside.
- Anime Chinese Girl: Implied to be from Taiwan.
- Braids of Action: One very long braid in the back, and definitely no slouch in combat.
- Citizenship Marriage: She is desperately trying to invoke this trope.
- Friendly Enemy: To Zombina.
- Friendly Zombie: While technically a Jiangshinote and Zombina's rival, she's overall not that bad and is also a Yaoi Fangirl like Zombina.
- Gratuitous Foreign Language: She says some Chinese words.
- Hyperspace Arsenal: Carries a surprising number of swords in her sleeves.
- The Illegal: She's looking to change that though.
- Immune to Bullets: Shrugs normal bullets off, being undead.
- Jiangshi: Though more zombie than vampire.
- Nigh-Invulnerability: Part of the undead package.
- Nothing Up My Sleeve: She hides large blades in her sleeves.
- Oddly Visible Eyebrows: As seen in the picture.
- Our Zombies Are Different: Jiangshi are a zombie subspecies in this setting.
- Shout-Out: She's a jiangshi who carries enormous blades and other weapons hidden in her sleeves, much like Hsien-Ko.
- Slasher Smile: Shark-like teeth and all.
- Inconsistent Spelling: The scanlators have her as Cici. Although Okayado actually clarifies the inspiration for her name in volume 10note . Coincidentaly, in Hungarian vernacular "cici" means a woman with small breasts...and while Shiishii is nicely curvy, she is one of the manga's few women who don't have spectacular breasts.
- Weaksauce Weakness: Rock salt apparently calms her down.
- Yaoi Fangirl: As befitting a "rotting girl". In fact, the whole reason she wants to marry a Japanese guy is so she doesn't have to sneak into the country to attend doujin events.
- You No Take Candle: A lot of her dialogue is rendered as such in the scanlations to imply she has a poor grasp of the native language, with a healthy dose of engrish thrown in.
Killa
A killer bee who is after Kimihito.
- Animal Eyes: Has compound insect eyes.
- Ax-Crazy: As if her name didn't make it obvious enough, she's every bit as violent and aggressive as the species she's based on.
- Bee Afraid: She is a human-sized humanoid killer bee with a Hair-Trigger Temper, an extreme violent streak and a deadly stinger filled with deadly venom.
- Bee-Bee Gun: Can control hornets via scent from her venom.
- Berserk Button: Spider thread like Rachnera's really ticks her off.
- Beware My Stinger Tail: Has a stinger that has venom.
- Determinator: She can deal with her weakness to smoke this way.
- Hair-Trigger Temper: Characteristic of her species, she angers pretty easily.
- Inconsistent Spelling: Killa or Kiira.
- Logical Weakness: Smoke and heat, especially the latter in the right conditions.
- Multi-Armed and Dangerous: Has four arms.
- Names to Run Away from Really Fast: Killa, from killer — as in a killer bee.
- Red Eyes, Take Warning: Colored illustrations show that she has red eyes, and she's pretty aggressive.
- Revenge: Her stated reason for attacking Kimihito. Turns out? It was against Rachnera.
- Scary Stinging Swarm: Her Pest Controller ability allows her to control swarms of hornets.
- Winged Humanoid: Has insect wings.
- The Worf Effect: A powerful, dangerous threat...ish. And the two OTHER species coming scare the crap out of her.
Kino
A matango that Papi found outside the house and brought inside.
- Exotic Eye Designs: Stars in her eyes. This is copied by people under the effects of her spores.
- I Just Want to Have Friends: It's hard when people get high just by being near you.
- Mushroom Maiden: She has a large mushroom cap on her head, tentacle-like hair, and volva-like feet.
- Mushroom Samba: Her spores are hallucinogenic.
- Power Incontinence: She can't really control her spores.
- Shrinking Violet: Incredibly shy and awkward around people.
- Verbal Tic: She often ends her sentences with 'ngo'.
Curie Drakulya
A vampire who entered Japan illegally. Eventually starts living in a shared home with Leechi, Moskii and Yatsume.
- Acrophobic Bird: In The 'Verse, vampires can fly using batlike wings, enjoy sleeping in coffins, can control bats with supersonic signals, and can pretty much only consume blood because they can only consume liquids with high iron content. Our Friendly Neighborhood Vampire is (at least initially) afraid of heights and can't fly, afraid of dark enclosed spaces and can't sleep in a coffin, is afraid of bats, is Afraid of Blood, and is generally too timid to consciously assault someone to drink their blood (the only times she did so, she was being possessed by her father's ghost, and desperate because her only nourishment for that day was toxic).
- Afraid of Blood: She can't stand the sight of blood.
- Alternate Identity Amnesia: She usually has no memory of her actions while under her father's control.
- Claustrophobia: The reason she refuses to sleep in coffins.
- Cute Little Fangs: Nope! In the vein of Rachnera, her mouth's full of razor-sharp, shark-like ones.
- Demonic Possession: When night falls, her father's ghost possesses her.
- Disappointed in You: Her father was incredibly disappointed in her for not being able to continue the legacy of the slowly dying Vampire race.
- Embarrassing Nickname: Coolie. Cool as a cucumber!
- Failed a Spot Check: Makes her appearance by biting one of the members of MON and sucking their blood. Unfortunately for her, said member was Zombina, meaning poor Curie ends up quaffing down formaldehyde.
- Fighting from the Inside: When Curie's father tries to force her to bite Papi, she resists him by biting herself instead.
- Genki Girl: Once her father's ghost is dealt with, she perks up a lot at night, becoming a lot more energetic and gregarious than her shy daytime self.
- Ironic Fear: She's really, really bad at being a vampire. She can't stand the sight of blood, fears heights, doesn't like cramped dark spaces, and is afraid of bats. This personality goes completely out the window at night, however.
- Inconsistent Spelling: Curie or Kyurii.
- Kiss of the Vampire: You expected anything different from this series? Her preparing to bite Papi is played up a good amount, with the harpy
blushing and sweating profusely as Curie starts licking her neck. - Lost in Translation: Papi calls her "Cucumber" (Kyūri), in Japanese. Since it doesn't fit in English, the scanlators went with "Coolie" instead.
- Lunacy: Almost to the point of being a split personality. During the day, she's polite and completely harmless. During the night, she's terrifying and predatory due to her evil father possessing her.
- Mystical White Hair: While she has white hair and is a vampire, about the only thing supernatural about her is her father possessing her: she has none of the stock vampire powers beyond flying with her wings.
- Our Vampires Are Different: They're not undead, to begin with: they're living being afflicted with a disease that alters their behavior and biology. Vampires have a weak digestive system and can only consume liquids (such as blood) for sustenance. They create ultrasonic waves that can be used to control bats. They have bat-like wings that enable them to fly, and, like Harpies, the wing makes up the entire arm, with their membrane going down to about their hips. Their weakness to sunlight is explained away by having very sensitive skin that is easily harmed by UV rays, and their weaknesses to garlic and silver are a result of allergic reactions. They do cast reflections, however, and their weaknesses to crosses is simply a cultural taboo. They sleep in coffins partly to shield themselves from sunlight, and partly out of species-wide habit, though Ms. Smith isn't entirely sure on the latter. To further complicate matters, Curie's profile and notes on the vampire virus suggests that the original, true 'vampires' died out long ago. This would mean Curie is simply a chiropteran demihuman infected with the virus.
- Parental Abandonment: Both her parents are dead.
- Sleepy Head: During the day, she's the equivalent of a human staying up late. Once her father's gone, she's much more energetic and outgoing at night.
- Supernatural Gold Eyes: Although, how supernatural vampires are in this setting is debatable.
- Why Did It Have to Be Snakes?: She's terrified of bats, even cute ones like fruit bats.
- Winged Humanoid: Wings for arms variant. She often wears special attachments to her wing claw to increase her dexterity.
- Your Vampires Suck: Oh lord, does it suck being a vampire in this series. Curie's profile pretty much has her dethrone Draco in regards to having an incredibly troublesome body: skin hypersensitive to UV rays, poor eyesight, allergies to silver and garlic, a digestive system so weak it limits her to a liquid diet (and she's malnourished because of her aversion to blood), wings that limit her wardrobe, sensitive ears that make noisy places hard to handle, and no cool supernatural powers like turning into mist, hypnosis or eternal life to make up for it. It's actually not too shocking that the vampire race is going extinct. Ironically it is theorized that vampires aren't even really originally vampires, but rather the remnants of a species of bat-like monsters that became infected with the vampire virus in ancient times.
Leechi
A leech girl who attended the extraspecies expo.
- Bizarre Alien Biology: She uses an exoskeleton suit to look more humanoid, because without it her tentacle-like limbs just wriggle around. It looks very scary, even more when she's splashing around in the pool. Then there's the whole hermaphrodite matter.
- Exotic Eye Designs: Being a leech-person, she has eyespots instead of normal eyeballs. They're normally drawn as either dots or lines that convey her mood.
- Genki Girl: She's always energetic, so much that the other girls are afraid she might get carried away if they share a pool with her.
- Hermaphrodite: Like an actual leech, she's a hermaphrodite.
- Mix-and-Match Critters: While she consumes blood like a leech, her appearance is more similar to a hammerhead worm, especially her head.
- Shameless Fanservice Girl: Prefers to lounge around in the nude. This annoys Moskii, who forces her to wear her exoskeleton suit and swimsuit. She also doesn't mind showing off her masculine sex organs (off-page) when the other girls are curious.
Moskii
A mosquito girl who attended the extraspecies expo.
- Animal Eyes: Has compound insect eyes.
- Early Installment Character-Design Difference: She only had two arms in the original magazine versions of chapters 49 and 50, which was corrected in volume 12.
- Flight: Like Killa she can fly with her mosquito wings.
- Multi-Armed and Dangerous: Has four arms.
- Nothing but Skin and Bones: She's extremely slender and emaciated, something which she says is necessary to fly.
- Valley Girl: Her speech is translated, like, totally this.
Yatsume
A lamprey eel mermaid who attended the extraspecies expo.
- A Lizard Named "Liz": 'Yatsume' means eight-eyes, which refers to the Japanese name for lampreys "yatsume-unagi" (eight-eyed eel)'
- Covert Pervert: She became rather excited when Leechi revealed she is a hermaphrodite, and progressively got more excited as they talked about Leechi's anatomy.
- Nice Girl: She cooks and cleans for the other girls, and wants to befriend Curie, despite their incompatible sleep cycles.
- Shown Their Work: Rather than the usual slits, her gill openings are circular like a real lamprey's.
- Supreme Chef: A variation. In addition to being a good cook, she knows how to prepare meals her more-hemovore friends can enjoy.
- Unscaled Merfolk: She's an eel, and as such she can move on land like a lamia. Much like Moskii, she doesn't depend entirely on blood for sustenance.
Nega-Suu
A large slime who entered Japan illegally. She is a nutrient-gathering slime who came to absorb Suu, an information and experience-gathering slime, as part of their species reproductive cycle.
- Bishōnen Line: While already quite The Juggernaut as a massive Blob Monster, when the group trying to dilute her with hydrophilic polymer instead forces her to shift into a Slime Girl, her new humanoid form grants her the ability to genuinely fight back against the humans and liminals trying to stop her from absorbing Suu. It also causes her to cross the bishonen line in another way by having her develop increasing human-like intelligence comparable to Suu, which really comes into play after successfully being purified of contaminants, as the Broker and co. give her some books to help her boost that intellect and join human society peacefully.
- Bizarre Alien Biology: The contaminated waters she absorbed at some point in her life are responsible for her resistance to water. Those impurities were also used to create a skeleton to support her massive body, lacking the sheer water pressure Suu uses to maintain her giant form.
- Breath Weapon: She copies Suu's ability to fire a beam of pressurized water from her mouth.
- Fusion Dance: Of the Power Booster variety, as per standard slime breeding. She's aiming to absorb Suu, the brains to her brawn.
- Knight of Cerebus: Unlike every other antagonist to appear before her, Nega-Suu is nothing more than a threat, and there isn't anything about her that gets played for humor or fanservice. Downplayed after she is defeated and regenerates into a more peaceful and intelligent state (indicated by her being shown to have learned to read). She later manages to fulfill her absorption instinct in another, non-antagonistic way by becoming the slime that directly produces more of the new humanoid slime species.
- Monster Progenitor: As a nutrient gathering slime (and quite a successful one given its size), her initial instinct was to absorb a experience-gathering slime and then divide into new slimes that continue the cycle of nutrient and information gathering. Suu was her target and she crossed an ocean to find her. However, after absorbing Suu's hand and interacting with her repeatedly, she learns to become a female humanoid slime herself, the first of the "black slime" subspecies. After her defeat, Nega-Suu mellows out, learns to read, and her filtering abilities are put to use in an experiment at Yukio's hot spring inn. During said experiment she absorbs DNA from many types of monster girls, and learns to use the information she gains from them to split off and produce new humanoid slimes of various shapes and colors, who proceed to find and leave with male human partners to go out into the world. Thus the humanoid slime becomes a functional species.
- Non-Malicious Monster: Unlike most other antagonists in the story, her attempt to absorb Suu isn't done out of malice or uncontrollable undesired biology. She's more like a wild animal trying to follow her base instincts of slime reproduction. Once she is stopped and contained, and inadvertently allowed to follow her instincts in another way, she becomes rather docile.
- Only Known by Their Nickname: The Broker refers to her as Nega-Suu in the middle of the fight to distinguish between her and Suu, the name sticks.
- Spikes of Villainy: Whereas Suu is always smooth and curvy no matter what form or size she takes, Nega-Suu has spikes jutting out of each of her joints except her hips. However, that's only while she's acting as an antagonist due to all that contaminated water. After her core is pulled out and allowed to reform with purer water, which also results in her losing her antagonist status, she loses the spikes.
- Stock Ness Monster: She's initially mistaken for this due to only a single eyed tentacle coming up out of the water.
- Story-Breaker Power: Unlike Suu, she's capable of being completely submerged in large bodies of water without the risk of being destroyed (she's stated to have changed her body into a gel-like form to keep from disintegrating). When subjected to an excess of hydrophilic polymer in an attempt to break her down to a containable size she simply adjusts her only somewhat reduced mass into a new form and breaks free, revealing a massive female body differing from Suu only in that she is covered in spikes. That said, if one can reach her core and extract it, the core seems to be relatively helpless.
- Super-Persistent Predator: Her entire purpose for sneaking into Japan was to find and absorb Suu, who is assumed to be the most extraordinary of experience gathering type slimes, to produce even more powerful slimes after they combine and split once more. Neither rivers nor hydrophilic polymers do much to slow her down.
- Unskilled, but Strong: Nega-Suu's tentacles aren't as dexterous as Suu's, but she makes up for it with colossal strength granted by her gel-like body and internal skeleton.
Lamia Tribe
Miia's friends from her village are Shequa, Sanka and Maru.
- Curtains Match the Windows: Shequa has blonde hair and golden eyes.
- Has a Type: Discussed in an omake. Sanka would like a guy she could just have fun with, basically a friend with benefits. Shequa dreams of landing a really kind guy who would remember and celebrate all kinds of anniversaries with her (first date, first time having sex, and so on). Maru on the other hand is down for just about anyone provided they are really into all kinds of sex all the time.
Echidna Tribe
One of the four Serpentine tribes present at the Stud Tournament
- Dude, She's Like in a Coma: The Echidnas intended to strangle Kimihito into unconsciousness before getting him off so they wouldn't have to face him in the intended fashion in the tournament.
- Facial Markings: Echidnas have lightning bolt shaped marks on their face as a coming of age symbol. They call them "tattoos", but they're actually (washable) paint.
- Has a Type: One of the key traits the Echidnas seek in their men is power, so their mates tend to be incredibly muscular.
- The Lad-ette: Seems to be their hat: Echidna are (at least on the outside) violent, crude and tough as nails.
- Real Men Wear Pink: As it turns out, their boyfriend is an excellent craftsman and made their earrings, rings, and necklaces.
- Tomboy with a Girly Streak: Despite their rough, boyish exteriors, they still wear adorable snake jewelry and are squishy romantics at heart. They like strong men because of how it feels when they are hugged by one, and are also fond of romantic comedies.
Melusine Tribe
One of the four lamia tribes present at the Stud Tournament
- Entertainingly Wrong: When they finally get Kimihito's pants off, they discover he doesn't have an erection around them. The tribe collectively believe he's "a pure boy" who can only be aroused by someone he genuinely loves, meaning they can't have their way with him. The narration reveals that in reality their excessive lewd and crass behavior was just a turn off for him.
- Extreme Libido: You thought other Lamia tribes or even the Satyr were bad? They have NOTHING on the Melusine. They flat out admit to Kimihoto that they couldn't care less about the tournament's rules, and immediately try to have their way with him.
- Wings Do Nothing: Played with. Melusine wings lack the musculature to get them off the ground and are useless on land. However, they are noted to be used to help them swim.
Medusa Tribe
One of the four lamia tribes present at the Stud Tournament
- Face of a Thug: Medusae have a perpetual scowl, which has been known to scare anyone who looks at them, so they try to alleviate their gaze by wearing glasses.
- Not So Above It All: They normally have little interest in the Stud Tournament and overall behave very conservatively compared to the other types of lamia who focus heavily on sex. However, should the "manliness" of their chosen mate be challenged/insulted they will readily show off how passionate they can be with him.
- Sexy Secretary: Rather than turning people to stone with their gaze, Medusa in this series seem to have a 'stony' demeanor, dressing in fancy suits and sporting Scary Shiny Glasses. Kimihito outright asks if its some kind of fetish they are into, which they promptly deny.
- Stating the Simple Solution: In the face of the Exchange program outlawing kidnappings and reducing the number of men exposed to the Serpentine races, the Medusa Tribe came up with a very practical plan. To simply hire men to join their society to reproduce. It would bring in far greater numbers than the kidnapping, and the potential of these men falling in love and staying for free would greatly help the species long term. Miia still objects to the plan because she believes in finding one's personal soulmate.
- Stoic Spectacles: Due to the fact medusae have an inherently intimidating gaze, enough to sometimes make others freeze in terror, every member of this tribe wears glasses in an effort to give a less menacing impression, which does well to highlight both their overall stoicly intelligent demeanors and their more understated, yet still very much present, sensuality compared to other lamia.
Alusia Van Dalsia
A young lightweight centaur who has come to train under Cerea in order to improve her racing form.
- The Ace: She's the fastest among her peers at the centaur sports school she attends. She also clears Cerea's (hastily-assembled) obstacle course with ease.
- Meaningful Name: She is named after the Andalussian breed of racehorses.
Rem Nighdrem
A nightmare centaur looking for a way to fulfill her species' special needs.
- Dark Is Not Evil: She is mentally compelled to create nightmares, looking for any excuse to give them to people, but she's not an outright bad person, only doing so when she's intentionally and willingly allowed the chance.
- Everyone Has Standards: She may be desperate for a way to fulfill her compulsion to inflict nightmares, but she refuses to break into people's houses just to have more targets. She may have an urge to do something that stresses people out, but she's not an outright criminal.
- Face of a Thug: She has a rather creepy disposition, particularly her having Creepy Shadowed Undereyes (which bring to mind sleep-deprivation-induced Exhausted Eye Bags brought by intense nightmares), but outside of her sheer compulsion to give people stressfully terrifying nightmares, she's actually a rather sweet and considerate girl, refusing to afflict people unless she's given explicit permission, and apologizing to Kimihito when she accidentally did so unprompted after seeing him napping peacefully.
- The Gadfly: While she's against forcing nightmares on people, she does get a bit of a kick out of creating dreams her targets find incredibly humiliating, such as a Dream Within a Dream where they wake up the first time to find that they've soiled themselves in front of their lover, only to then wake up for real.
- Interspecies Friendship: Develops one with the baku(dream-eating tapir) by the end of her chapter
- Meaningful Name: She is a NIGHtmare who can affect DREaMs. Her given name also brings to mind REM sleep.
Cheron du Pell
A heavyweight centaur who has taken up farming, now that strength of arms is no longer as important as it once was.
- Accent Adaptation: She has the classic case of a thick Kansai accent getting turned into a heavy southern accent in the English translation.
- Amazonian Beauty: She's a very attractive centaur lady with an impressive busom, and she is also visibly muscular, having nicely built arms, well-toned stomach muscles, and thick legs. When she goes through her temporary Art Shift this is even more pronounced, still being just as attractive while becoming outright buff, her arm muscles getting thicker and her stomach getting notable abs.
- Call to Agriculture: With centaur culture changing in recent times (jousting becoming simply a sport for instance), she decided that becoming a farmer who can optimize work in places where her strength and mobility were useful over machines was the best way for her to live out a life as a "knight".
- Let's Get Dangerous!: She acts like a bumbling and kindhearted, if strongly forward-thinking, lady under normal circumstances. But if anybody tries to threaten her livelihood, she performs an outright Art Shift into something out of Fist of the North Star before showing the offending threat who they're dealing with. She goes right back to normal after the problem is dealt with.
- Meaningful Name: She is named after the Percheron breed of workhorses.
- Retired Badass: Like many other heavyweight centaurs, she used to be one of the fiercest knights in centaur society, specifically being "The Great Warrior of the Pell Family", as stated by Cerea. Also like other heavyweights, she had a Call to Agriculture once knighthood became obsolete, lovingly tending to her crops when she can. Just because she's retired doesn't mean she's any weaker, though, as some wannabe produce thieves learn the hard way.
- Smarter Than They Look: Cerea and Kimihito initially had the impression that she was simply a farming-obsessed country girl, but she later shows she actually has well thought-out plans to create a self-sufficient and highly-profitable agricultural system for extra-species by utilizing their skills and physical abilities in order to get work done without the need for costly high-maintenance stuff like tractors. Hearing all this really surprises them.
- Underestimating Badassery: Cerea heavily underestimated her strength at first, despite being a strong heavyweight centaur, since she seemed like a Kindhearted Simpleton. She realizes her mistake after seeing her beating a biker gang to a pulp when they tried to steal her produce.
Meamil Airagu
A dairy breed centaur who asks Cerea for advice on dealing with her overproduction of breast milk. Her true motives are actually quite different...
- Baby Morph Episode: Downplayed. A side-effect of her breast milk is that anyone who consumes it is affected by the maternal hormones and mentally reduced to an infantile state. She manages to subject all the satyrs at the farm to this, and temporarily gets Kimihito into this state after forcing him to drink some of it, intending on breast feeding him afterwards to keep him for herself.
- Bitch in Sheep's Clothing: While she passes herself off as sweet and innocent, she's actually extremely manipulative and perverted, pretending to need advice from Cerea all as an elaborate plot to seduce Kimihito and make him hers.
- Covert Pervert: She acts innocent enough, but she actually has a large breast milk and mothering fetish, tricking people into drinking her breast milk and reducing them to an infantile state, so that she can be their "mommy" and get them to keep nursing off of her. She's even willing to suck her own breast to entice her victims, and is defeated by being mesmerized by Cerea's breast milk and sucking her breast, leaving her in a similar infant state and begging for more of "Mommy's Virgin Breast Milk".
- Alternative: Meamil has a strong nursing/milking fetish, as indicated by her comparison of Kimihito's and the satyrs' techniques. She may get a power kick out of reducing her marks to an infantile state, and in any event that makes it easier for her to ditch her victims when she gets bored and wants to seek out another toy.
- The Hedonist: Her sole motivation in seeking out Kimihito as her boy toy is to have a supreme breast massager at her beck and call. She initially targeted the satyrs at the dairy farm but found them lacking in multiple ways. In particular, while she much appreciated the satyrs' technique, their self-interest kept them from satisfying Meamil's self-interest. After overhearing how Kimihito's technique was superior and tiring of her romp with the satyrs she sought him out.
- Hypocrite: Condemning the satyrs as perverted is hardly inaccurate, but it's mighty rich coming from her.
- Laser-Guided Karma: Gets her tactic accidentally turned back around on her after she ends up drinking Cerea's breast milk, and is left a womanchild throwing a tantrum on the ground begging for more of Cerea's "virgin breast milk".
- Motherly Side Plait: She wears her hair as such, all the better to put forward a maternal air.
Nicole Unicole
A unicorn centaur and a groupie of the ANM48 extraspecies idol girl group who seeks help in curbing her overspending habits.
- Ascended Fangirl: She later becomes a virtual idol under the pseudonym Yunico Monokerosu as part of the Broker's project to promote less human-like extraspecies girls as idols in the hope of redirecting her passion to livestreaming and reducing her expenses. It fails because Nico now focuses on purchasing livestreaming equipment instead.
- Groupie: She's a fanatical one for all 48 members of ANM48, with most of her expenses consisting of attending their concerts and buying their various merchandise.
- Money Dumb: Her bad spending habits leave her constantly short of money, even with the exorbitant fees she receives from selling her horn shavings to the Broker! Unfortunately, this could potentially ruin Nico's health if she shaves her horn too much. When Nico gets into livestreaming, she overspends on various livestreaming equipment instead.
- Otaku Surrogate: She's basically a non-human version of a cute otaku girl obsessed with her hobbies and fantasies.
- Unicorns Prefer Virgins: A variant. Unicorn centaurs value goodness, persistence and purity and, for Nico, ANM48 symbolizes these values.
Pegasania Bellerophon
A pegasus that just showed up in the living room looking for a dear friend that seemed to have forgotten about her.
- Charm Person: She's constantly giving off a powerful regal aura just like Mero, which helps conceal that she's every bit the scatterbrained ditz that Papi is.
- The Ditz: She and Papi get along so well because they're Birds of a Feather, no pun intended. Pegasania also has little concept of modesty, doesn't know how the world works, and tends to accidentally cause problems simply because she doesn't think things through.
- Innocent Fanservice Girl: Much like Papi, she has no concept of modesty.
- Pegasus: Of the centauroid variety.
- Seemingly Profound Fool: Because of her regal bearing and antiquated, royal speech habits, she comes across as being extremely wise and profound in her statements when she's actually an airhead who just doesn't understand the concepts of things like money or modesty.
- Sleepwalking: A variation as she occasionally takes naps while flying.
Arbatel
A grimoire that has been trapping people's minds inside herself, having them live out a high school rom-com style manga.
- Animate Inanimate Object: She's not technically an extraspecies monster herself, rather she's a magic tome brought to life by all the magic and information she's been made to contain. Agent Smith even admits it's kind of a grey area as to whether she counts as extraspecies as a result. Upon finding her archive of rom-com manga, Manoko theorizes that her love of high school rom-coms came as a result of the information she absorbed being nothing but high school rom-coms.
- Arc Villain: Villain is a stretch, but she's the main antagonist of the "Grimoire High School" arc.
- Brainwashing for the Greater Good: Played with. She seals away the memories of the various people she takes inside her world so as to let them live out a rom-com scenario and develop legitimate romances, and doesn't do anything further than that, not discriminating from heterosexual nor homosexual romances, only that they be monogamous. While the various couples end up grateful for the experience after they're freed, even sending in thank you letters and petitions for leniency for her, as Cerea points out it was still kidnapping and brainwashing. And while that case turned out for the best, she was planning on brainwashing Kimihito after he found out her identity purely out of disgust for him being a "polygamist" so she could "fix" him, only being stopped due to her succumbing to Love at First Sight herself.
- Exotic Eye Designs: Her true eyes have her pupils replaced with a magic glyph comprised of an encircled triangle.
- Hate at First Sight: She unambiguously hates Kimihito due to recognizing him as a rom-com Harem Genre lead. As someone who prefers monogamous love and hates polygamy in stories due to feeling it's a Writer Cop Out over having to actually choose a romantic partner, she instantly sees Kimihito as the kind of person she hates the most, and deliberately refrained from brainwashing him so that she could change his "filthy harem obsessed heart" by giving him the chance to have a "proper" and healthy romantic relationship. Zombina even notes that despite her impressive manga collection in her archives, there's not a single harem story in it.
- Hidden in Plain Sight: While her identity isn't actually revealed until the last chapter of the arc, her cover identity of "Honma Shiori" is present from the very first chapter of the arc, being part of a group of students suffering Cuteness Proximity whenever a couple gets together. It's actually said detail that lets Kimihito figure out who she is, as while the group has six people in it, she's the only female in it completely unrelated to any romantic situation, following Zombina's theory that the real Arbatel would rather be a "watcher" than an active romantic interest.
- Hoist by Her Own Petard: The two things that lead to her downfall come down to her decision to not brainwash Kimihito and MON, and to brainwash Agent Smith. With the former, Kimihito retaining his memories allows him to easily free the others, and even though MON are kept isolated to the school to serve as various ghost stories, Zombina retaining her memories lets her draw from her own love of rom-com manga to help Kimihito figure out that the real Arbatel is likely not involved in a relationship. Brainwashing Agent Smith meanwhile turns her into a Love Freak that keeps tabs on the various up and coming romances, something that Kimihito exploits to determine the one female student not involved in any romances and determine that she's the real Arbatel.
- Love at First Sight: What ultimately forces her to admit defeat. As a Love Freak, she's obsessed with watching couples get together, but she isn't immune to the cliches she loves so much. So when another member of her usual group, the one male in her group to not be involved in any romantic situation, has a Crash-Into Hello with her and accidentally gropes her, she ends up falling in love with him. She quickly lampshades this, and admits defeat since she feels she has no right to keep people in her "perfect world" when she herself is involved in the same kind of story now.
- Love Freak: She's a massive fan of rom-com manga, and becomes a Shipper on Deck for any couple she sees as fitting the mold of one found in one of her manga. She prefers watching romances though rather than experiencing them, so she refrains from finding a partner herself, which is what lets Kimihito figure out who she is when everyone is involved in some form of relationship but her.
- Mind-Control Device: The school uniforms she puts on the people she traps inside herself seal away their memories of the outside world, instead making them think they're high school students at an extraspecies co-ed school. Taking the outfit off allows one to regain their memories, as Kimihito discovers when Papi gets hers back after accidentally stripping again.
- Mysterious Past: Who exactly owned her original tome form, and how she originally was brought to life, is unknown. The only theory available is one proposed by Manako, that her love of rom-coms comes from the information she's absorbed prior to being brought to life, suggesting she was exposed to a lot of them at some point.
- Troperiffic: The world she brings everyone's minds into is very heavy on the rom-com cliches. When everyone finds her archive is filled with countless rom-com manga, it leads them to theorize she's trying to create the "perfect" high school rom-com, using her many manga as a source of inspiration.
- Villainy-Free Villain: Downplayed. While she is indeed trapping people's consciousness inside her, she has the decency to bring their comatose bodies to the hospital so nothing happens to them. And outside of surpressing their memories, she doesn't actually force them to do anything outside of live out a rom-com scenario. Once she admits defeat, a bunch of the people she trapped actually petition for her to receive leniency since they became genuine couples from the experience and are thankful for what she did.
Sekmeti Letopolis
A mummy with whom the Broker wants to make a contract for the rights to produce and sell cards for the Collectible Card Game, Duel Monmusus.
- Childhood Friends: Her childhood friend, the sphinx Abul, is also her servant.
- Crippling Overspecialization: Her card deck consists exclusively of the most powerful monster cards of the game. While this seems impressive, Kimihito uses a spell card during their duel to eliminate all monster cards on both sides. Since Sekmeti's deck consists of only monster cards, she loses by default.
- Duels Decide Everything: Like all mummies, she believes in using Duel Monmusus to settle any dispute, whether as major as deciding to sign a contract with the Broker or as minor as deciding what to have for dinner.
- Expy: Her deck is filled with ones to the various monsters, and later cards in general, used by famous Yu-Gi-Oh! rival character Seto Kaiba, just as cute monster girls. Her ace monster is the "Brutal Eyes Jade Dragon", an obvious nod to Kaiba's famous "Blue-Eyes White Dragon", she revives it with "Revivification", the spell "Monster Reborn" and she even upgrades it into "Brutal Eyes Chaos X Dragon" with a ritual card, a nod to Yu-Gi-Oh! The Dark Side of Dimensions where Kaiba used the spell "Chaos Form" to summon "Blue-Eyes Chaos MAX Dragon". A group shot of monsters in her deck also shows monster girl versions of "Obelisk the Tormentor", "Saggi the Dark Clown", "Vorse Raider", "The Wicked Worm Beast", and "Battle Ox".
- Good Old Ways: She will always play according to the classic rules of Duel Monmusus from ancient times (e.g. no costs for using monster cards, no matter their strength) and has no intention of learning or using the game's fairer modern-day rules. Sekmeti also expects her opponents to follow the classic rules as well.
- Really 700 Years Old: She is over 3,000 years old and was one of the designers of the original game that would eventually be known in modern times as Duel Monmusus.
- Seductive Mummy: She mostly appears to be an exotic, beautiful woman, wearing most of her bandages like a long tight skirt.
- Sore Loser: Downplayed. While she is generally a good sport, Sekmeti doesn't take being defeated in a Duel Monmusus game that well. She often insists on a rematch until she wins.
- Suspiciously Similar Substitute: Of Yami Yugi from the manga Yu-Gi-Oh! since both are keen card game duelists with Egyptian origins. The stylized eye that Sekmeti wears on her forehead evokes the iconic eyes on Yu-Gi-Oh!'s Millenium Items and the Duel Monmusus game itself is basically the Yu-Gi-Oh! card game with monster girls.
- Worthy Opponent: After playing several duels with Kimihito, Sekmeti comes to respect him as both a player and as a person.
Abul
A sphinx looking for a direction in life after modern Japanese children fail to live up to her fantasies about Ikkyū, a cunning boy hero from Japanese folklore.
- Childhood Friends: She is a servant and a childhood friend of the mummy Sekmeti, who sends Kimihito and his friends to help Abul with her life crisis.Abul: Is that so wrong?!Miia: No, I mean... Yeah, I think it is wrong if they're kids...
- Has a Type: As a result of her fascination with Ikkyū and his stories, she is attracted to cute young boys, especially those who are clever.
- I Have Boobs, You Must Obey!: At Rachnera's suggestion, Abul uses her sex appeal to motivate boys to try harder in answering more difficult riddles. It works but Kimihito is worried about how this might affect the young minds of Abul's audience.
- Our Sphinxes Are Different: Like all the sphinxes of her world, Abul enjoys telling riddles but does not eat those who answer incorrectly, unlike many other fictional sphinxes.
- Pædo Hunt: She's a shotacon due to loving stories about Ikkyū, and is initially hesitant to admit to Kimihito and the gang that her reasoning for not asking anyone other than grade school boys her riddles is that. Everyone's reactions, Miia's in particular, highlight their unease with the revelation, especially since her trying to bribe kids with snacks comes off a lot more sketchy in that regard, but it's largely Played for Laughs still.
- Wishful Projection: When she first arrived in Japan, she assumed that most of the children there were as clever as her beloved hero Ikkyū despite Ikkyū's stories being more or less fictional. When reality hits her, Abul finds herself gradually simplifying her riddles to make them more interesting, which results in the more selfish children taking advantage of her and asking for large piles of snacks as rewards for answering simple riddles correctly.
Aluca, Garu, and Vikki
A vampire (Aluca), werewolf (Garu), and flesh-golem (Vikki) who Smith met in Arbatel's rom-con world.
- Age-Gap Romance: To their dismay, their boyfriends turned out to be high schoolers once they're freed from Arbatel's world. According to Aluca, they have the species exchange to relax, but their relationship complicates things.
- Bait-and-Switch: Initially, it looks like Ms. Smith successfully managed to recruit the three for MON, the three admiring the work she does and understanding how useful their skills are thanks to her coordination. Instead, they get jobs as bodyguards for the Black Lily Research facility, the President having found out they were looking for work and undercutting Ms. Smith's offer by offering them better pay, less overt danger, and more free time for their boyfriends. They're still grateful for what Ms. Smith does, but Ms. Smith is more focused on the Prez screwing with her again.
- Chekhov's Gunman: Initially appear only in Chapter 78, appearing as the three girls while Ms. Smith is on her high school stage, and returned in Chapter 84.
- Hair-Trigger Temper: Garu notably has this trait.
- Meaningful Name: Aluca's basically a derivative of Alucard.
- Our Werewolves Are Different: Garu's a fully transformed wolf girl like all the werewolves in the world.
- Technopath: Vikki can manipulate electricity through her electric waves
