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    Tetsuo Takahashi 

Tetsuo Takahashi
Voiced by: Junichi Suwabe (Japanese), Cris George (English)

A biology teacher at Shibasaki High School. Takahashi was always interested in working with demi-humans, but was never allowed to do so due to their rarity and lack of government aid. As luck would have it, he'd encounter four demi-humans at the very school he works at, and so he interviews them to gain a better understanding of demi-humans.

  • Adorkable: The guy has a scientific mind through and through, so him bringing up embarrassing subjects to the Demis without thinking and out of sheer curiosity overrides the due appropriateness of the subject at hand. One of the reasons the girls approach him is because the guy is a massive dork with whom they can talk about their Demi-specific problems that they couldn't bring out to other people because the Demis are too particular for just anyone to relate to them.
  • Alliterative Name: His first and last names both begin with "T".
  • Audience Surrogate: He's primarily the one who'll ask the questions the viewers are probably asking, being the interviewer and all.
  • Beady-Eyed Loser: He noticeably has dot-like pupils with barely any iris, and Hikari sometimes makes fun of him for being a bit older than most.
  • Buxom Is Better: Subtle hints reveal him as such a person.
    • He finds hugging Machi's body as crossing the line of professionalism and very inappropriate behavior for a teacher.
    • Whenever Satou uses her powers, he tries to advert a Male Gaze to her chest.
    • When Satou gave him an official taste of her seduction powers during an interview during Episode 9, he was able to conceal the effect it was having on him. However when she decided to not "cheat" for his affection and earn it fairly, she zips up her jacket and accidentally gets her Gag Boobs caught, revealing how large they are in the process. Upon seeing this, he looses his composure and almost has a total breakdown.
    • Satou appears to have realized this preference and attempts to capitalize on it during the Beach Episode to flirt with him. Once she reveals her bikini, he has a few Male Gaze moments.
    • He secretly enjoys seeing women in clothing that accentuates their bust, such as tank tops and form fitting aprons.
  • Chick Magnet: Kyouko and Sakie have things for him, and both Hikari and Yuki have been flustered around him a couple of times.
  • Cool Teacher: Students consider him among the most sociable teachers.
    • He isn't afraid to have frank conversation with his students and doesn't mind discussing sensitive topics. For example his conversation with Hikari concerning a vampire's sex drive (particularly whether blood-sucking is as Hemo Erotic as stories and legends portray it as), without entering the realm of harassment or having ulterior motives.
  • Covert Pervert: He's just as affected by Satou's Succubus-ness as any other dude, he's just better at hiding it. Also, it's implied he thinks Buxom Is Better.
  • Foil: He and his old friend Souma are complete opposites. Souma has a handsome appearance and works at a university, a job far more prestigious than a high school teacher, but he's a big oddball behavior-wise. Takahashi more thickly built and is a high school teacher, but he connects easily with his students.
  • For Science!: How Machi and Satou try to trick him into romantic situations. Neither are bold enough to do it on their own initiative, so Hikari and Ugaki respectively push them.
  • Genius Bruiser: Not that there's fighting here. Takahashi, however, is very muscular for a biology teacher. You'd think he wrestled pigs growing up or something. Machi is particularly fond of his arms.
  • Gentle Giant: For a simple biology teacher, Takahashi's huge. Even Hikari's first words after meeting him is to just point and say "You're huge!" That said, he's a very decent guy.
  • Heroic Build: He's a Nice Guy who genuinely wants to learn about, and befriend, the monster girls. He also has the physique of a god.
  • Hunk: Satou and Machi seem to think so. He's admittedly rather built for a simple biology teacher.
  • In-Series Nickname: Students call him "Tetsu-sensei." Due to what "Tetsu" means (iron), fan-translation translates that to "Ironman." In both cases, it lampshades his Genius Bruiser nature.
  • Insecure Love Interest: Kurt deduces Takahashi hasn't made a move on Sakie because he's insecure about his feelings for her. He's clearly attracted to her physically and mentally (she's even an embodiment of several fetishes), but makes up excuses to not pursue her.
  • Intergenerational Friendship: He's closest to Hikari (considering he calls her by her first name, allowing which being a sign of endearment in Japan). That said, they're Just Friends due to him being a teacher.
  • Male Gaze: While good at hiding it, he's not able to resist Satou's seductive powers. Whenever she loses control of them in his presence, he will helplessly steal a glance at her bosom and curves. One of the reasons Satou likes and appreciates him is because he actually makes an effort not to act upon the urge and maintain an air of civility between them, which most men are unable to do.
  • Muggle: He's the only pure human member among the main cast.
  • Nerves of Steel: On the contrary to Satou's assumption, her seductive aura does affect him. However, he's just really good at hiding it. As a bonus, his name contains the Japanese word for "Iron".
  • Nice Guy: A good teacher who always has his door open for his students, who makes the demi girls feel welcome and relaxed, who has gradually made them less ostracized, who has become a dear friend to them and a person with integrity to rely on. This, of course, is the main reason Satou likes him and wants to be with him. The guy's just awesome.
  • Not So Above It All: Satou thinks he's immune to her natural charms. He isn't really, he just has a world-class poker face.
  • Oblivious to Love: Machi and Satou are crushing hard on him, but he's completely unaware of it. He's also not quite sure whether he likes Satou back, as the lustful effect that she produces interferes with his rational thinking; still, he considers her a friend and colleague.
    • He seems to be under the mistaken impression that Satou enjoys using him as a platonic test subject to experiment her succubus powers on, because he's been suppressing how much of an impact they have on him.
  • Perma-Stubble: Sports a thin goatee at all times.
  • Reasonable Authority Figure: He may be interviewing the girls, but he's also their teacher and still manages to keep a hold of his authority.
  • The Reliable One: For the Demi girls and Satou. Deconstructed in episode 11 when it is wondered if he is going too far or making the girls dependent on him. Reconstructed in the same episode where it is shown he isn't going too far, and showing that being reliable is inspirational to the other students.
  • Running Gag: In the anime, whenever the girls hear Takahashi say something that gets their hearts racing, the words echo again in their head, but sounding more baritone and sensual each time it's repeated. It doesn't help since his voice actor is Junichi Suwabe, who is known for his deep and suave voice.
  • Science Hero: He uses his expertise in biology and The Scientific Method to help the students and Satou feel at ease about their unique abilities. Rather than base his judgement on prejudicial or tragic mythological tales, he attempts to ground them on actual facts. With the exception of Satou, the demi-humans are mostly harmless in their current condition.
  • The Smart Guy: He is a biology teacher. Despite the general public's lack of knowledge of demi-humans, his already existing knowledge of human physiology also proves quite useful.
  • Smoking Is Not Cool: Takahashi smokes on very rare occasions, so far smoking only one with Ugaki after his last one years ago. When Hikari smells it however, she's instantly revolted by it.
  • Spiky Hair: Which Takahashi notices he has in common with Machi.
  • Stern Teacher: Invoked. He has almost no conditions regarding the demis approaching him for help, but he does not abide that they get bad grades, as Hikari finds out.
  • Tall, Dark, and Handsome: His imposing figure is one of his defining features, commanding respect out of the demi girls, and causing Satou to like him as a man.
  • Thinking Out Loud: Takahashi has a bad habit of doing this, sometimes at the worst moments.
  • Vague Age:
    • He's called an old man by Hikari and Sakie notes the age difference between her and him is greater than her and the girls (24 vs 16ish). Whether this leads him in his assumed thirties is unknown.
    • Kurt has stated Takahashi's is not quite 10 years apart from Sakie, though the insinuation indicates it's close. Sakie was confirmed as 24 in a previous chapter.

    Hikari Takanashi 

Hikari Takanashi
Voiced by: Kaede Hondo (Japanese), Bryn Apprill (English)

A vampire girl. Hikari is a very hyperactive girl who often causes trouble for the others.

  • Agony of the Feet: Hikari usually pitter-patters around her house in bare feet in casual clothes. She learns the downside of this when she stubs her pinky toe on a table leg.
  • Always Identical Twins: With her younger sister Himari, from which she differs only in the color of eyes and hair.
  • Ambiguously Gay: In addition to the stuff mentioned in Les Yay over in YMMV, Chapter 43 has Hikari become outright drunk off Sakie's seduction, which would normally only work on men, due to vampires naturally linking the processes of eating and fulfilling sexual desires.
  • Animal Motifs: Housecat for her playful nature. Also the vampire bat.
  • Book Dumb: Her grades are simply awful, to the point that as early as Chapter 3, Takahashi has to pay a visit to the Takanashis just to discuss her grades.
  • Character Tics: She sometimes has to nibble on things or people (without breaking the skin) to appease cravings to bite stuff.
  • Cuddle Bug: She is very fond of hugging Yuki, even before they become friends. This is due to the fact that Yuki is naturally cold, providing a refuge from the heat. It later becomes a less self-serving effort from Hikari, as the girls grow mutually fond of each other.
  • Cute Little Fangs: Well, she's a vampire, sure, but this also indicates her bubbly personality.
  • Daywalking Vampire: While she's Weakened by the Light, vampires can walk out in daylight.
  • Foolish Sibling, Responsible Sibling: Is the Foolish to Himari's Responsible.
  • Friendly Neighborhood Vampire: For the most part she doesn't look or act like a vampire other than a few quirks regarding light and heat.
  • The Gadfly: Oh yes. Whether it's glomping Kusakabe, looming up behind Takahashi and pretending to bite him (the sharp points he feels are not her fangs, but two pencils), or messing with Machi's body while her head is on a date, er, experiment, with Takahashi, she does enjoy being the little prankster.
  • Genki Girl: Hikari is almost never seen without being hyperactive to some degree or another. From the first hours of the morning to the end of the school day, she's energetic and demanding others be the same.
  • The Glomp: It's her way of greeting people and showing enthusiasm. She actually feels uncomfortable when she's not allowed to do this with people she considers friends or family.
  • Glowing Eyes: Gets these in any sort of flash photography. Takahashi speculates that vampires have the same additional reflective membrane in their eyes hat most wildlife with nightvision have, leading to this effect.
  • Hurricane of Puns: Has a habit of making constant blood-related puns one after another, much to Himari's chagrin.
  • Ironic Name: Due to the meaning behind "Hikari" in Japanese, Hikari is a creature of darkness named "light".
  • Know-Nothing Know-It-All: Hikari acts like she knows plenty about love when talking with Machi, but in reality she has zero experience with it.
  • Meaningful Name: Hikari generally means "Light" in Japanese. "Bright" would be an understatement for her personality. There's also some irony, since vampires are almost always associated with darkness.
  • Mukokuseki: Discussed even. She has blonde hair for some reason, likely a trait of being a vampire, which obviously stands out from the rest of her family. To make it seem like it's biologically feasible, her father dyes his hair blonde.
  • Nice Girl: In droves. It's Hikari's enthusiasm and natural curiosity that brings Machi, Yuki and Satou into Takahashi's office and counsel. She is the first to assure them that it's safe and worth it to be open to him. Due to her, Takahashi was able to approach the three other Demis with confidence.
  • The Nicknamer: Usually gave them to her friends and teachers on the fly. Such as Macchi (or Macchy), Yukki, and Sakki (or Succey). But just plain "Sensei" for Takahashi.
  • Non-Uniform Uniform: She wears brown socks, has a shorter skirt, doesn't button her collar, and leaves her blouse untuck.
  • The Nose Knows: As a vampire, she has a sharper sense of smell than normal. It doesn't stop her from chowing down on garlic, and liver & onions; but she does get repulsed by the stench of tobacco on Takahashi after he's smoked a single cig with Ugaki.
  • Not a Morning Person: Naturally, as the sun is rather unpleasant for her as a vampire.
  • No Sense of Personal Space: She'll be up in people's face without hesitation, and often hugs Kusakabe, with the added bonus of Kusakabe having a lower body-temperature as well.
  • Odango Hair: Used as a replacement for the vampiric pointy ears. She actually styles hairdo this way on purpose, and has trouble donning the hairstyle without the help of her younger sister.
  • Our Vampires Are Different: Mostly played straight.
    • Defying archetype, Hikari does not perish when exposed to sunlight, although it stresses her out and she does actively try to stay in the shade as much as possible.
    • She can see herself just fine in the mirror, as well as polished tile flooring.
    • She isn't repulsed by crosses, nor does garlic dive her away. She in fact loves the latter because of its strong odor.
    • She does seem to have body heat unlike a typical vampire, as she finds hugging Kusakabe "cool".
  • Polar Opposite Twins: Hikari and Himari are nothing alike whatsoever, right down to appearances. Their faces are the same, but Hikari is so expressive compared to Himari that it's almost impossible to tell.
  • Shipper on Deck: She doesn't mind scheming ways for Machi to get closer with Takahashi.
  • Sliding Scale of Vampire Friendliness: She definitively belongs to the friend end of the spectrum:
    • Blood Requirement: While she does need blood, this is fulfilled by state-rationed blood packs, so no exogenous blood needed. (Friendly)
    • Craving Type: Not discussed, but seems more animalistic than utility; she does bite on Yuki and Himari out of urges. (Friendly)
    • Conversion: Does not convert. (Friendly)
    • Superpowers: Slightly superhuman senses, particularly smell and night vision. (Neutral)
    • Weaknesses: Intolerant, but not fatally so, to light and heat. (Towards either end of the spectrum)
    • Appearance: Few differences from a muggle: her fangs are short enough to pass as Cute Little Fangs, and the pointy ears turned into triangular Odango Hair. (Neutral)
  • Trademark Favorite Food: She loves Tomato Juice because it feels the most like drinking blood outside of her monthly pack, not to mention she also has shown a fondness for Liver and Onions. Also, despite the stereotype, she loves garlic.
  • Vegetarian Vampire: She receives blood packs on a monthly basis and does drink it, but she enjoys tomato juice and liver. She still feels the temptation to bite, though, so she often nibbles on her sister to sate that urge.
  • Weakened by the Light: Not to any harmful levels. She, like other vampires, are sensitive to heat in general.
  • Your Normal Is Our Taboo: Whereas vamps in fiction feed for food, etc., Hikari's description makes it sound akin to a romantic or sexual act.
  • Your Vampires Suck: Not that she takes it seriously. She's not harmed by crosses, and can easily eat garlic. The sun hurts, but vampires don't like heat in general. And a stake to the heart? Well, that would kill anyone!

    Kyouko Machi 

Kyouko Machi
Voiced by: Minami Shinoda (Japanese), Terri Doty (English)

A Dullahan girl. Machi is a sweet girl who falls in love with Takahashi.

  • The Ace: Believe it or not, Machi is actually one of the best performing students in her own grade, being great at both athletics and academics. Headlessness may be an inconvenience to daily life, but is certainly no handicap in school.
  • Animal Motifs: Teddy bear wearing a red scarf.
  • Attack Its Weak Point: Not that it'll kill her, or anything like that. According to Machi, touching that weird flame thing where her head would be is very uncomfortable, akin to having her body pressed down.
  • Awesomeness by Analysis: Machi is on a whole different level of variation of all the Demi girls, as her condition borders on the very fringes of science, even opening the possibility of fueling the research to understand the very fabric of the universe. She's a scientist's dream subject, so much that she even considers becoming a scientist to investigate herself.
  • Bizarre Alien Biology:
    • She has a totally functional neck. The problem is we never get to see it—from the outside she's Losing Your Head, but a gastroscopy shows up completely normal. Takahashi's old friend, Souma, speculates that Machi's "neck" is actually a wormhole of sorts that connects the head and body.
    • Takahashi explains to her that regular people compensate for the head-bobbing produced by the walking motion unconsciously by using their necks, and that it is a part of the normal process of walking; in the case of Machi, he elaborates, she does these very same compensating motions with her arms, which functionally fill in for her lack of a physical neck by holding her head with them. This even includes the mechanics of head-tilting and environment awareness, and it's so fine-tuned that otherwise she wouldn't even be able to walk. This, Takahashi explains, is one of the many aspects that make Machi so fascinating to study and interact with.
    • In a conversation with Takahashi, Souma compares her to a dimensional door that could be utilized by other dimensionally related demis such as Yoko, Zashiko, or Kaoru. He compares the use to a game breaking bug, that in the worst case scenario the world itself would end. At the same time, she meets up with all of said dimensional demis along with her friends and reality does indeed start changing as everyone present is now capable of interacting with Zashiko, her head becomes connected to her body by an actual neck, and the auras begin combining into an ominous "dead fish eye" color.
  • Boyish Short Hair: Has it out of necessity, as she has trouble holding her head if her hair is too long.
  • Cry into Chest: Having a detached head, she's able to do this to herself when crying.
  • Cuddle Bug: Machi is fond of people holding her head, and is upset when her parents stop after she enters high school. Takahashi theorizes that, since dullahans like Machi need their heads to be carried by either their body or by someone else, they naturally desire physical contact and affection.
  • Damn You, Muscle Memory!: Unfortunately, Machi's body acts upon whatever she's seeing, even when miles away. One Potty Emergency causes her body to try and stand up when Machi sees a public restroom... except her body's stuck at Hikari's house.
  • Hidden Buxom: To be fair, she is quite well-endowed & viewers can see that when she's taking a bath. However, in episode 9, Hikari & Yuki wonder why Machi wears a vest during hot summer weather. Machi explains that the sweat will make her undergarments show through her shirt. Machi lifts up her vest, cue watermelons.
  • Huge Schoolgirl: She's pretty tall as she's about a head above her friends. As Takahashi imagines Machi with her head and body attached, she'd theoretically be rather tall, maybe about as tall as Satou.
  • The Ingenue: She doesn't get any of the wordplay innuendos that occasionally get spoken, and she was oblivious to the obvious lies from Kurtz. She doesn't see anything wrong with a Teacher/Student Romance, though Takahashi could be twice her age.
  • Last of Her Kind: Not because dullahans are dying out. Machi is simply one of only three known dullahans in the entire world.
  • Nice Girl: Machi is just pleasant to be around in general.
  • Only Sane Man: Machi's behavior is the most normal out of the demi-girls, despite having the most glaring trait out of them.
  • Silver Tongue: As shown in episode 11, Machi is very succinct and reassuring when giving words of kindness and praise towards Takahashi, even eliciting Yuki to unconsciously erupt in applause when she finishes talking.
  • Smitten Teenage Girl: Takahashi is her first crush, so her actions around him are innocently adorable.
  • Something Else Also Rises: When Takahashi calls her by her first name, the flame on her torso practically becomes a welding torch.
  • Spiky Hair: Has the same hairstyle as Takahashi.
  • Student Teacher Romance: Machi has a crush on Takahashi, but he isn't aware of it.
  • Super Drowning Skills: Zigzagged. She can swim just fine... as long as she isn't holding her head, seeing as she probably wouldn't be able to even tread water while holding it. She's even understandibly a little afraid to put her head underwater. Machi even surmises that the old legends of Dullahan being unable to cross running water may in fact be because they didn't want to risk dropping their heads. Because if they did, they'd be screwed.
  • Talking with Signs: She can write perfectly, even when her head is miles away, to communicate with whoever's with her body.

    Yuki Kusakabe 

Yuki Kusakabe
Voiced by: Shiina Natsukawa (Japanese), Sarah Wiedenheft (English)

A yuki-onna (snow woman). Kusakabe is initially a shy, withdrawn girl who doesn't particularly hang around people.

  • Afraid of Their Own Strength: She fears her freezing ability will become so powerful, it will lethally freeze everyone and everything around her. An experiment by Takahashi proved her abilities are nowhere near that deadly and she has nothing to worry about for the moment.
  • All the Other Reindeer: The other normal schoolgirls insult Kusakabe behind her back because they think that she's being full of herself. Thankfully, Hikari is able to sort it out.
  • All Therapists Are Muggles: Her self-imposed social isolation was having a severe emotional impact. For this reason, Takahashi brought all the demi-girls together for a therapy session where they could share burdens humans wouldn't understand. He specifically cites Satou as the foremost authority for being a teacher, demihuman, and woman.
  • Animal Motifs: Penguin.
  • Closet Geek: She freakin' loves manga, especially gag and comedy manga. However, she tries hard to hide this from the others, with the only one even having the slightest idea being Satou-sensei.
  • Covert Pervert:
    • In episode 8/ Chapter 27, after she heard from Satou that the Josei manga Snow Love contains some mature scenes, she chuckled and said the following to herself, while publicly pretending a fly flew into her mouth:
    If it has dirty stuff like that, I should check it out.
    • She desperately tries to suppress her laughter (anime) and blushes madly (manga) when Hikari describes Takahashi's arm as hard, thick, and hairy.
  • Cry into Chest: Takahashi does this to help calm her down. That she got the opportunity made the other girls jealous.
  • Empty Eyes: Kusakabe's eyes notably don't have pupils.
  • Girly Run: Kusakabe runs this way in gym class, while Machi and Himari run a bit more efficiently.
  • I Just Want to Be Normal: Kusakabe especially wishes she was just a normal human, rather than a demi.
  • An Ice Person: She can reduce her surroundings to below freezing, cries frozen tears, and maintains no body heat.
  • Just Friends: Satake has a crush on her. She's mostly unaware of that, seeing him as this.
  • Leave Me Alone!: Because she's afraid of her own strength, she initially refuse to communicate with others.
  • A Lizard Named "Liz": A yuki-onna whose name translate to "Snow Under-the-Sun".
  • Logical Weakness: Anything that differs too much from her internal temperature, such as dry summer heat, obviously has some harmful effects on her, more so than Hikari. What's making it worse is she has far fewer sweat glands than muggles, which makes heat dissipation more difficult for her. Although she can take hot baths, she does note that she takes them shorter than average.
  • Not So Above It All: Once she opens up thanks to Takahashi and the girls' efforts, she turns out to be just as nutty as everyone else.
  • Power Incontinence:
    • Kusakabe unconsciously freezes the air around her whenever she's under heavy mental distress. She also unconsciously freezes the cold sweat from her feet, which causes the fear that she may catastrophically lose control of her powers and hurt people. Thankfully, Takahashi is able to figure out that such a thing is unlikely to happen.
    • Brought up again in Episode 9 in an Anime-only segment where she goes to Takahashi to see if she can consciously invoke her cryogenic powers, rather than do so unconsciously under stress and negative emotion, such that she won't overheat so easily. Humorously, it doesn't work out quite so well.
  • Shipper on Deck: She tries to help Machi get closer to Takahashi.
  • Shrinking Violet: Yuki was very shy and withdrawn to the point of seeming aloof and arrogant. This perception is ultimately the real cause of her bullying. Thanks to Character Development she grows out of her shell.
  • Silent Snarker: When she grows out of her withdrawal she develops into this, often snarking off the view of the cast (but not the viewers) over the wackiness of the situation.
  • Took a Level in Cheerfulness: After learning that her Power Incontinence was not horrifically dangerous, she opens up to the other girls, ultimately becoming happy and cheerful, which is lampshaded by those that didn't remember her being that cheerful.
  • Visual Pun: Kusakabe emits cold vapors from her body as sweat, starting with her feet, whenever she feels nervous, which condenses into ice crystals. Yes, the resident Yuki-onna gets literal cold feet.
  • You Gotta Have Blue Hair: Kusakabe noticeably has teal hair, possibly a trait of being a yuki-onna.
  • Yuki-onna: She has fewer sweat glands (thus more adopted to colder climate), and, keeping in line with the yuki-onna legends' sad theme, would freeze her body fluids when under emotional stress.

    Sakie Satou 

Sakie Satou
Voiced by: Yoko Hikasa (Japanese), Morgan Garrett (English)

A succubus. Satou is the newest teacher at the school, her field being math. Despite the stereotype, she is not a sex maniac in the slightest, and in fact very much wishes her sex appeal would just go away-not because she's prudish, mind, but she recognizes just how shallow the feelings she induces are.

  • Above the Influence: Invoked. She could easily get Takahashi by appealing to his lust with little effort, but he happens to be a man she both likes and respects, which would make such endeavor a bad choice. She strives to make him approach her out of his own volition and tries to take little steps herself, though there's very little that she can actually do about it without eliciting the lustful effect.
  • Accidental Pornomancer: Does not really like the fact that she can induce lust on anyone around her.
  • Alliterative Name: Her first and last names both begin with "S".
  • Animal Motifs: Plain looking teddy bear with it's eyes closed.
  • Attractiveness Isolation: Her relationship with Takahashi. He finds her incredibly attractive and intellectual, but wonders how much is due to her super pheromones. She worries about being too aggressive in courting him, as she wants him to love her through freewill and not her powers.
  • Beergasm: The third episode in the anime pays homage to Neon Genesis Evangelion with her saying Misato's Hard-Drinking Party Girl quote about beer, while wearing a yellow tank-top and blue shorts.
  • Blessed with Suck: Being a succubus certainly has its drawbacks. Just touching a human causes them to become instantly sexually aroused, so Satou lives far, far out in the countryside in a small cabin, completely alone. She wakes up every morning at 4 a.m. in order to have enough time to walk the several miles from her house to the train station (she has to take the earliest train to avoid as many people as possible), and at the end of the day, she takes the last train of the night (for the same reason). It's very difficult to stay awake due to having to get up so early but be unable to sleep until she gets home very late at night (as well as other reasons stated in the Erotic Dream entry below).
  • Christmas Cake: Satou has willingly forced herself down this path. With her power unleashed she could have any man she desires, but detests the idea of a fake romance. She therefore seeks a man who's Oblivious to Love. The manga likes to poke fun of her being single.
  • Consulting Mister Puppet: Episode 8 starts with her doing this with her teddy bear. Eventually it turns out the teddy bear is a stand-in for Takahashi.
  • Covert Pervert: Satou tends to let her imagination run wild—let's say, erotic—when it concerns Takahashi.
  • Eating the Eye Candy: She can barely contain her enthusiasm after seeing Takahashi in swim trunks.
  • Erotic Dream: If Satou falls asleep, she induces these into those around her. And unlike her pornomancer abilities that only works on people who are attracted to females, it affects everyone. Because of this, succubi aren't welcome in apartments or high-concentration neighborhoods, and she is shown in the anime to live in a house where there are no other dwelling in sight.
  • Hates Being Touched: Because she can arouse people at the slightest touch, it's rather understandable that she try to shirk physical contact. However, she doesn't "hate" it per-se, as she longs for both male companionship and meaningful contact
  • Hidden Badass: She used Judo to stop bullies from harassing her as a teenager, and the close proximity forced said bully to make an absolute idiot of himself in front of the whole school. As a result she's also a Badass Teacher.
  • Hidden Buxom: She wears baggy clothes in an attempt to conceal her curves. She's so busty that doing so makes her appear above average, which still counts as a success since she's a lot bigger when relaxing in house clothes. During the Beach Episode, Satake falls out a tree and goes unconscious after spying her in a bikini.
  • Hot Teacher: She tries hard to avoid becoming one. Despite her efforts she has a secret fan club among male students.
  • Horny Devils: Although not personality-wise.
  • I Just Want to Be Loved: Satou-sensei is markedly lonely and her line of thought early in the series (resigned to be alone for the rest of her life at age 24) wouldn't be normal for an attractive young woman otherwise, but there's only so much that a lovesick succubus can do on that respect. Cue Takahashi-sensei... and for the first time, she's charging into the love battlefield.
  • I Love You Because I Can't Control You:
    • She desires to court Takahashi under the mistaken belief he's immune to her supernatural seduction. Her feelings become more sincere as she learns more of his kind personality and physique.
    • After discovering he's not immune to her powers, she still finds his ability to resist and not immediately act upon the lust she induces as exhilarating. From time to time she fantasizes how much of her power would it take to make him breakdown or submit.
  • Irony: As Ugaki realizes, there's something certainly curious about a Succubus, a living embodiment of wanton lust, actually falling in love head-over-heels with a guy.
  • Living Aphrodisiac: The ultimate existence of a succubus and how she describes herself.
  • A Lizard Named "Liz": A succubus (サキュバス, read as sa-kyu-ba-su) named Sakie.
    • This gets discussed in Chapter 41. The similarity was a complete coincidence, and after it was discovered that she was a succubus she was frequently teased about it as a child.
  • Meganekko: She's inexperienced in romance, a mathematician, has supernatural beauty, and wears glasses. Her need for corrective vision is authentic, but cannot wear contacts without increasing her allure. As if to emphasize this point, when trying to seduce Takahashi for a hug she temporarily takes them off.
  • Nerds Are Sexy:
    • She falls in love with Takahashi even more, after hearing him deliver a scientific thesis on how her powers work.
    • Her own intellect and constant attempts at downplaying her physical beauty, also cause the trope to apply to herself.
  • Nervous Wreck: To call Satou "jumpy" would be an understatement. Satou's liable to freak out at the slightest surprise.
  • Not So Different: Her mutual interactions with Takahashi show that she and him happen to react to one another very similarly, though unlike Sakie, Takahashi isn't quite sure that his attraction to her is due to her lustful effect. Still, she is very attracted to him to a surprisingly similar degree.
  • Paper-Thin Disguise: Invoked. She tries to appear as physically unflattering and plain as possible as to not elicit attention towards her appearance; it does work to a certain degree as long as people don't look too closely. However, people do find her to be gorgeous upon closer inspection, making her disguise somewhat iffy.
  • Property of Love: Why she never pursed a romantic relationship with anyone. She is quite aware she can instantly cause men to enjoy her presence and obey her whims, but does not desire a lover from Happiness in Slavery.
  • Reluctant Fanservice Girl: While she dresses modestly to suppress her aphrodisiac effect, she's also embarrassed to show too much skin. Though she'll make an exception for Takahashi.
    • In the opening, she tries to cover up a picture of herself in a seductive outfit.
  • Reluctant Monster: While not to the point of I Just Want to Be Normal, she doesn't want to seduce anyone.
  • Sensei-chan: She becomes this for the demi-human students.
    • When asked how she refers to Satou, Hikari replies "Succey", prompting Takahashi to ask if they're best friends.
    • She humorously considers Machi a secret rival for Takahashi despite the age difference between them. She's easily jealous how Machi gets more fawning attention than she does.
    • She has the same interests in anime and manga as Yuki. They also share a peculiar humor in puns and innuendo.
  • Single-Target Sexuality: Takahashi is the only man she has romantic desire for.
  • Single Woman Seeks Good Man: She picks up a crush on Takahashi after when she mistakenly believes that he isn't affected by her supernatural charm.
  • Sliding Scale of Beauty: She is between Level I (Divine) and Level II (World Class). Takahashi already considers her a 10/10 beauty, though the lustful effect she elicits is already "superhuman", to say the least. According to Ugaki, Satou is beautiful even among succubi.
  • So Beautiful, It's a Curse:
    • Being a succubus, she's sex appeal personified. This unfortunately causes a lot of problems for her because of what can happen if she loses control over her lust aura.
    • Takahashi theorizes that succubi release powerful pheromones that are a source of Smells Sexy. Under this hypothesis, the artificial hormones also create a Beer Goggles effect. Ugaki points out that Satou is naturally beautiful and already a "ten" on the sexy scale. This results in her being one of the most powerful registered succubi in Japan, as it takes her Up to Eleven in attractiveness.
  • Strangely Arousing: As a succubus, Satou has the natural ability to arouse people around her, even through slight physical contact.
  • Supernatural Is Purple: She's a succubus and has purple eyes to show she isn't normal.
  • Tarnishing Their Own Beauty: Due to being a succubus, even slightly attractive appearances makes her arousing aura that much more effective. To suppress it, Satou wears a track jacket and pants, and gives herself an unflattering hairdo. Even all that doesn't stop others from considering her to be pretty.
  • Unknown Rival: To Machi for Takahashi. Even she admits its very childish, considering the age gap between them and she has a tremendous unfair advantage as a succubus.
  • Wham Shot: In-universe and twice in episode 9. She leaves Takahashi basically paralyzed when she removes her coat and glasses, letting her hair down; then, she unintentionally lifts up her breasts in front of him when zipping up her coat back. These go to demonstrate just how professional Takahashi is around her.

    Himari Takanashi 

Himari Takanashi
Voiced by: Lynn (Japanese), Jamie Marchi (English)

Hikari's human twin sister, the younger of the pair. She does a lot to put up with Hikari, which makes her helpful to Takahashi for learning more about living with demi-humans.

  • The Ace: She's one of the very best students at school, ranging from first to second overall in standardized tests
  • Always Identical Twins: With her older sister Hikari, from which she differs only in the color of eyes and hair.
  • Aw, Look! They Really Do Love Each Other: Though she is the first to raise her voice in protest to Hikari's behavior and the slack she has to pick up, there is little that Himari wouldn't do for her twin sister.
  • Cloudcuckoolander's Minder: She is the first person that makes sure that Hikari does what she's supposed to do, though Hikari still manages to lag in spite of her efforts. Still, even when Himari moans and groans a lot on her twin's account, she is the first that comes to Hikari's defense if she feels that she's been wronged or hurt.
  • The Cynic: Invoked. She tends to assume that the people that approach Hikari don't have the best intentions and would either harm or take advantage of her due to Hikari's Demi nature and natural kindness.
  • Fiery Redhead: Averted, as she is calm and coolheaded, though her hair is simply dyed auburn for fashion.
  • Foolish Sibling, Responsible Sibling: The responsible one to Hikari's tomfoolery.
  • Girlish Pigtails: Most often wears her hair like this.
  • Girly Run: During a dramatic scene in Episode 6.
  • Idiot Ball: When Takahashi suggest that Hikari might need help with her hair because she doesn't have a reflection, she freaks out over her earlier rejection of her, nevermind that she had seen Hikari's reflection before, which was lampshaded by Hikari herself.
  • My Sister Is Off-Limits!: She takes this frame of mind with Takahashi, when she became suspicious of his curiosity with Hikari.
  • Polar Opposite Twins: She and Hikari are nothing alike, right down to appearances. Their faces are the same, but Hikari is so expressive compared to Himari that it's almost impossible to tell.
  • Security Blanket: Surprisingly, she's the blanket to Hikari, as Hikari nibbles on her to sate her vampiric biting urges.
  • Token Human: Out of the main female cast, Himari is the only human out of them.
  • You Gotta Have Blue Hair: Invoked. Her hair is actually dyed auburn for fashion.

Side Characters

    Yuusuke Satake 

Yuusuke Satake
Voiced by: Yuusuke Kobayashi (Japanese), Austin Tindle (English)

Yuki's male classmate.

  • Audience Surrogate: Regarding the Girl Watching of the female cast.
  • Butt-Monkey: Put it simply, the demis don't seem to notice him.
  • Dogged Nice Guy: He likes Yuki a lot, though he's at his wit's end on how to approach her without sounding insensitive, making him practically out of boundaries.
  • Hormone-Addled Teenager: Perversion is his defining trait.
  • No Name Given: In the manga. In the anime he was given the name Yuusuke, the first name of his voice actor.
  • The One Guy: The only boy that has a recurring speaking role.
  • Stating the Simple Solution: In episode 11, after much ado and spending a considerable time outside looking in, he and his friends realize that the way to approach the demis and become friends with them is to follow Takahashi's example and familiarize themselves with the "demi" aspect of Hikari, Macchi and Yuki, and not try to ignore it like most people unwittingly do.


Voiced by: Kenjiro Tsuda (Japanese), Bill Jenkins (English)

A detective working for the demi-human department, specifically handling succubi. He's also Satou's handler and more or less her father-figure

  • Beleaguered Bureaucrat: Between being partnered up with a kid, trying to keep tabs on succubi who're unhappy with the additional surveillance, and having to deal with often ambiguous and hazy seduction incidents where determining the culprit is difficult, Ugaki's got it pretty tough.
  • Getting Crap Past the Radar:
    • He's more of a father figure to Satou than her own biological dad. Ugaki claims no heterosexual man can resist her abilities without extensive training, and a youthful Satou had difficulty controlling her powers. Her estranged relationship with her father, was from him keeping away from her out fear for a dangerous consequence.
  • If You Thought That Was Bad...: He explains to Takahashi the precarious, extremely delicate and poorly understood nature of succubi-related sexual crimes and how it's basically the bread and butter of his department. As a matter of fact, this is implied to be one of the reasons he took special interest in the care of Satou and this partly explains why she's such a straight arrow in that matter.
  • Large Ham: Ugaki seems to have a lot of fun approaching almost any conversation with the subtlety of a truck.
  • Parental Substitute: To Satou. Satou even tells him that he was more of a father than her own.
  • Shipper on Deck:
    • Ugaki approves of Satou's infatuation with Takahashi, and subtly tells him to take good care of her.
    • He actually encourages Satou to let loose and seduce Takahashi with her powers. He justifies it morally as Satou and Takahashi are good people and would make a great couple.

Voiced by: Sora Amamiya (Japanese), Mikaela Krantz (English)

A German boy working alongside Ugaki.

  • Bad Liar: Makes a very distinctive face whenever he's lying. The anime takes this further with him speaking in a deeper, stilted voice that makes it even more obvious than it already is.
  • Badass Adorable: A cute young teen that can even wrestle Ugaki.
  • Bratty Half-Pint: He's a handful to work with, due to his immaturity.
  • Expy: Kodansha Comics' translator's notes noted his design is basically a clone of Kitaro from GeGeGe no Kitarō, except that his hair was parted to the other side.
  • Genius Ditz: He's exceptional at deducing people's emotional states and offering relationship advice.
  • Horny Devils: Chapter 42 of the manga reveals his immunity towards the succubus' allure comes from him being an incubus, the male equivalent of a succubus, though his own alluring power is quite weak. This also explains Hikari initially mistaking him for Sakki-sensei when almost bumping into him in the hall.
  • The Matchmaker: In a single evening he's able to bring Sakie and Takahashi closer together than they did on their own for a year.
  • Oh, Crap!: The way you can tell he's lying is through this facial expressions.

Voiced by: Natsuki Hanae (Japanese), Dave Trosko (English)

Takahashi's friend from back in college. Souma works as an assistant in the Musashino University of Science. However, he's a bit of an oddball.

  • Art Shift: In contrast to Takahashi, Souma has a much thinner build, and is drawn is more like a Bishounen from a 70's anime.
  • Ditzy Genius: He is quite brilliant to be working in a University in Japan. However, he is, in Takahashi's words, a weirdo. Specifically, whenever he's in deep thought, he completely freezes in place and practically loses all cognition of the real word.
  • Foil: To Takahashi. Souma is working in a much more prestigious position in a university, and is thinner and more classically handsome, but he has a couple screws loose in his head; while Takahashi is a high school biology teacher, more strongly built, but is also more down to Earth.
  • Large Ham: Once he goes on a scientific tangent, there's no stopping him.
  • Nightmare Fetishist: He breaks out laughing at his own thought that Machi could theoretically be used to end the world.
  • Perpetual Smiler: The first thing Takahashi says is to point out that Souma has only one expression as always, specifically this.

     Yoko Takahashi 

Yoko Takahashi

A freshman at Musashino University, Tetsuo's niece, and a Spiritual Medium Demi. Due to her eyes she's the only one able to see and knowingly interact with Zashiko.

  • Perception Filter: She functions as one herself, subconsciously acting in a way that would obscure Zashiko's actions. This, in turn, presents one for her. While she believes she's simply observing or physically pointing out what Zashiko is doing, she will actually be acting in a way that would attribute those actions to herself such as holding on to a ball that would otherwise appear to be levitating or perceiving herself to be watching Zashiko sit on Tetsuo's lap when she is in fact sitting on him herself over the child's position within the physically observable dimension.



A young Zashiki-warashi living with Yoko.

  • Invisible to Normals: She exists entirely in a different dimension, similarly to a Dullahan's neck.

     Kaoru Higa 

Kaoru Higa

A Kijimunaa from Okinawa
  • Aura Vision: She's able to see people's auras as a colored fog and can see how they mingle as well.
  • Mind Control: Subconsiously attracts fish. With the understanding that her powers are potentially beyond the normal scope for a Kijimunaa, Takahashi theorizes that she could potentially exert control over humans as well. Essentially if a yuki-onna can turn negative thoughts to cold and a succubus can control sexual thoughts, then she could potentially use the ability to read thoughts to overwrite them as well. She wants nothing to do with that.
  • Mood Ring Eyes: To her everyone else has these, giving her a way to roughly read minds.
  • Power Limiter: Her shades are used to help block out the sight of people's auras and eye color changes to help avoid alienating people by knowing too much about them.
  • Shipper on Deck: According to her Takahashi and Satou have a great combined aura, and that it's only a matter of time before they get together. She lets Machi know to try to avoid having the girl's heart broken.

     Spoiler Character 

Invisible Girl

An unnamed demi-girl who appears in the Episode 13 OVA. Her physical body is completely invisible, which she uses to go out and have fun.

  • Didn't Think This Through: When she accepted Takahashi feeling her face to form a mental image of her, she certainly wasn't expecting for him to grasp her face full-handed, notwithstanding that he's a huge guy, thus, huge hands.
  • If You Thought That Was Bad...: Because of the ingrained perception of communication as a mutual endeavor, Takahashi has problems grasping the possibility of talking with a person that is, for almost all senses, immaterial. As such, and aside from the fact that she is naked, Takahashi asks her to cover herself so that he can at least know where to talk to.
  • Innocent Blue Eyes: When we get a peek at how she would probably look, she has noticeably blue eyes. Considering she's also an Innocent Fanservice Girl...
  • Innocent Fanservice Girl: She feels no embarrassment about being naked, seeing as she's invisible anyway. Though this unnerves Takahashi because he doesn't know where to look except for her butt indent on the chair she's sitting on, and later after Takahashi discerns how she would look by feeling her face, she actually does get embarrassed.
  • Invisible Streaker: Her body is completely transparent, but any clothing on her would stick out like a sore thumb. However, she has absolutely no qualms about walking around naked, saying that it seems to suit her anyway.
  • Last Episode, New Character: Even beyond the last episode, since she appears in a post-anime OVA that already Overtook the Manga.
  • Rose-Haired Sweetie: When we get a peek at how she would probably look, she has red hair. She also helped direct Satou and Takahashi to the demi-girls when they were in the forest alone offscreen.


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