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Girlfriends 21 -
Momoha Bonnouji
Debut: Chapter 108
Rentarou's 21st girlfriend. She is the school's Ethics teacher and groundskeeper who lives in a tent near the vegetable garden.
- Anti-Role Model: She tells Rentarou not to end up like her, a hedonistic drunk who can't save money.Uto: If we take her to be an example one shouldn't follow, few could surpass her in the act of impressing ethical insight.
Kurumi: That doesn't excuse her being a teacher at all. - Berserk Button: She goes absolutely livid if people express a desire to be like her. She doesn't even like seeing Mimimi impersonate her as part of her acting practice.
- The Cobbler's Children Have No Shoes: Momoha has a firm grasp on what ethics are and is diligent in making sure people don't end up like her, but her own life is an unethical mess.
- Confession Triggers Consummation: She attempts to invoke this trope by asking for sex where the other girls would confess to Rentarou. The boy refuses to submit himself.
- Corruption of a Minor: She got her first taste of gambling and alcohol when she was only 3 years old.
- Cute Little Fangs: She has a prominent fang in her mouth that adds to her carefree attitude.
- A Day in the Limelight:
- Chapter 113 shows that Momoha actually does know a thing or two about ethics, the subject she teaches, her everything-else-about-her notwithstanding. Later in the chapter, it's Momoha who helps Nano and Mei realize how best to enjoy the light show they've all gone to see.
- Chapter 129, with Hahari and Iku. The three of them team up to keep their vices in check on a do-over date with Rentarou after feeling they messed up their previous date.
- Chapter 170, with Mai. She joins Mai at the Maid Certification for moral support, then joins in with the Bunny Girl Certification alongside Mai.
- Deconstructed Character Archetype: Of The Hedonist. One would expect such a character to be selfish, lazy, and bratty when she can't indulge her vices. In actuality, she is extremely grateful and generous toward those who have shown her kindness, works very hard to repay that kindness many times over, and only gets upset if she has to choose to repress her passions. If she doesn't have access to something she wants or other people refuse to indulge her, she is fine with doing without in that circumstance.
- Disproportionate Reward: If anyone shows her charity, she pays them back immensely. Yamame got a shed full of new gardening equipment as thanks for some excess vegetables, and Hahari got the entire school's grounds cleaned every day for letting Momoha live on campus.
- Do You Want to Copulate?: Instead of asking Rentarou to go out with her, she straight up asks if he'll have sex with her. When he turns her down, she says she'll wait patiently until he changes his mind.
- Dye Hard: In-Universe. Her present-day hair color is light brown at the top and dark brown the rest of the way. Volume 13's bonus chapter shows the light brown is likely her natural hair color. When she's turned into a baby in the third Baby Morph Episode, her hair then is also brown.
- Everyone Has Standards: Subverted given she joins to the group anyway, but despite her very carefree lifestyle, she still finds it questionable when she discovers Rentarou has twenty girlfriends including an 89 year-old woman, going so far as to ask him if he even knows the concept of ethics.
- Expository Pronoun: The casual atashi.
- Foil:
- To Mei. Both were kicked out of their family's homes and eventually found by Hahari, and they both do work for her in exchange for living where they work. But while Mei's parents disowned her due to being crippled by loan shark debts, Momoha was disowned because her parents thought she was doing too much for them and wanted her to be independent.
- To Mai. Momoha is slovenly and viceful but shows selfless gratitude to others for their kindness, and is very patient. Mai is proper and diligent but is mainly motivated by jealousy and vanity, and is clumsy and impatient. Mai even serves as a caretaker of sorts to her, as Mai is usually the one who helps Momoha get back to her tent when she's too drunk to get there by herself.
- To Rin. Momoha commits all manner of vice without caring that people notice but chews people out for admiring her. Rin cares so much about people discovering her vices that she hid them for years so no one would ever find out.
- Forgets to Eat: Or rather, forgets to have money for food. Because she blows through her whole salary on frivolities as soon as she receives it, she regularly goes hungry. It doesn't seem to bother her much, though, and Yamame supplies her with excess vegetables from her garden.
- The Gambling Addict: Loves pachinko and horse betting, among her other vices.
- Gambling Ruins Lives: Her homelessness is partially a result of her gambling addiction.
- Good Bad Girl: Downplayed. While she's never had a partner, she has a lot of solo experience, and she's also very generous.
- Hard-Drinking Party Girl: Is always drinking or drunk thanks to her love of vice. Her family owns a brewery so she can get free booze whenever she wants. She also drinks a special booze made from flowers, which is why she doesn't have the odor alcoholics usually have.
- The Hedonist: Holding back on her desires makes her angry, which inconveniences those around her, so she decided never to hold back. If getting booze or sex is impossible, however, she's totally fine waiting.
- Heroic Self-Deprecation: Despite how charitable she can be, she doesn't think highly of herself as a person due to all of her vices.
- Homeless Hero: Momoha lives in a tent on school grounds because she can't afford rent, but puts all her effort into helping others instead of taking care of herself.
- The Hyena: When Momoha gets drunk enough, she'll laugh incessantly.
- Hypocritical Humor:
- She's the ethics teacher, but her lifestyle is anything but ethical, leaving her in no suitable position to call out Rentarou dating 20 girls at the same time, one of whom is 89 years old.
- She is shocked to learn that Tama has never had sex before, suggesting she thinks any pretty adult is certain to be sexually active, which is awfully hypocritical coming from someone who is a virgin herself.
- Improbable Self-Maintenance: Downplayed. She’s a homeless hedonist who lives in a tent at the school where she teaches. Despite subsisting almost entirely on booze and surplus vegetables from the gardening club, she’s quite well-endowed and beautiful. Though it’s mentioned that the school chairwoman lets Momoha use the school’s facilities as she likes, so it’s easy for her to maintain her looks.
- I Owe You My Life: She was kicked out of her family home because she wouldn't stop pampering her parents. She still sends them most of the money she earns.
- Masturbation Means Sexual Frustration: In her own words, she has experience out the wazoo when it comes to solo stuff.
- Meaningful Name: "Bonnou" is the Japanese term for the 108 earthly desires, and the kanji in her given name spells out the same number. Both allude to how Momoha is ruled by her vices.
- Moment Killer: Momoha tends to ruin romantic moments between herself and Rentarou by suggesting they have sex.
- Money Dumb: She never has any cash on hand because she always spends it immediately.
- Money Fetish: Momoha becomes giddy whenever an opportunity to get a large amount of money arises, to the point where it can outweigh her alcoholism.
- Mood-Swinger: She can switch between carefree and crying buckets at the drop of a hat. It's hard to tell how much of it is due to the alcohol and how much of it is just how she is.
- Ms. Vice Girl: She's reckless with money, a slave to her hedonism, shameless about bringing up her sex drive, and unwilling to clean up her act, but she's also very generous and hardworking for the people she cares about.
- Mystical 108: Has a lot of references to the 108 earthly desires built into her character info. Aside from her name and her introductory chapter, her birthday is October 8th, 10/8.
- Numerical Theme Naming: Her name is a reference to the 108 earthly desires, and she was introduced in Chapter 108.
- Perpetual Poverty: Can never keep any money due to spending it on drinking and gambling and acts of charity.
- Really Gets Around: Subverted. While she has no trouble asking for sex or masturbating, she admits to Hakari that she has no experience with a partner, due to being a hot mess.
- Sensei-chan: She manages to be even less professional as a teacher than Naddy.
- Seven Heavenly Virtues: Despite her hedonism, she's shown to exercise pretty much all of them:
- Charity: She provides financial support to her parents and the school where she works.
- Chastity: She respects Rentarou's refusal to have sex with her.
- Diligence: She does grounds-keeping work at the school every day.
- Humility: She's fully aware of how bad her personal lifestyle is.
- Kindness: She's always grateful to those who help her and/or show kindness of their own to her.
- Patience: If she's unable to indulge in her desires, she has no problem waiting until she can.
- Temperance: She tries to discourage others from making the same life choices as her.
- Smoking Is Not Cool: Momoha used to smoke but the smell would bother other people, so she quit.
- Support Your Parents: Momoha's parents kicked her out of their home due to her providing them with financial support and them wanting her to be more independent. She's still sending them money by the time she meets Rentarou.
- Teacher/Student Romance: She's the second teacher to go out with Rentarou after Naddy.
- The Tease: Yet another one. Only she openly requests that Rentarou have sex with her and makes an attempt at seduction when they just met.
- Trash of the Titans: When Rentarou sees how messy her tent is, he imagines Chiyo would blast a beam from her mouth to tidy it up if she saw it.
- Whole Episode Flashback: Volume 13's bonus chapter reveals how 3-year-old Momoha came to develop a love of gambling and drinking.
- Wingding Eyes: Momoha's eyes sometimes turn into yen coins when she's given a chance to get a lot of money.
- Your Approval Fills Me with Shame: A variation. She's against any approval towards herself or her lifestyle, less because she thinks poorly of the rest of the harem and more because she doesn't want any of the girls to end up like her.
Rin Baio
Debut: Chapter 115
Rentarou's 22nd girlfriend. She is a second-year middle school student and scion of a family of talented violinists.
- Astonishingly Appropriate Appearance: Her ladylike appearance hides some very sharp teeth, reflecting how her genteel exterior hides a fetish for violence.
- Character Catchphrase: In the scanlation, she exclaims "Molto Violento"note whenever she sees something violent. (In the original Japanese, she says "Violensuwa", a portmanteau of "violence" and "desuwa", which would usually be rendered in English as "Oh my, violent!" or "Violence!".)
- Dark Secret: She's terrified of people discovering her love for violence, as she's afraid it will get her labeled a perverse freak.
- Deconstructed Character Archetype:
- Shows that some Casual Kinks won't be accepted, since they're bizarre and antisocial enough that at best you'd get funny looks and at worst they'd cause people to think you're a pervert and a freak. Fear of this happening caused Rin to hide her desires from everyone.
- Her initial backstory also makes fun of the hysteria over violence in media, since she (rather unrealistically) became a total violence fanatic after watching mere seconds of family-unfriendly programming. Volume 14's reveal that she loved violence since she was a toddler pokes fun at it in a different way, since even the slightest hint of violence set her off. She has also never visited an arcade because her parents think all video games are Murder Simulators… which causes her to get excited over whack-a-mole when Rentarou takes her there anyway.
- Distinctive Appearances: She has red eyes, sharp teeth, and hair that shades from black to red.
- Early Personality Signs: The Volume 14 extras reveal that Rin showed a proclivity for violence even when she was a baby. Her parents (specifically her father) spent her childhood sheltering her from violence when they noticed.
- Elegant Classical Musician: Rin loves playing the violin and is extremely talented at it. Her parents play the violin as well and started her lessons at a young age to build a dynasty.
- Entertainment Above Their Age: She’s a middle schooler who enjoys violence of all forms, with her favorite video game being Resident Evil.
- Expository Pronoun: The formal, polite watashi.
- Face of an Angel, Mind of a Demon: Downplayed in that she isn't cruel or malevolent, but beneath her sweet exterior is an intense love of violence.
- Foil:
- To Hakari. Both are ojous with very unladylike character traits - Rin is a Nightmare Fetishist and Hakari is a Lovable Sex Maniac.
- To Iku. Iku is a tomboy who plays baseball and openly engages in her masochism despite denying it, while Rin is a girly girl who plays the violin and tries to hide that she's a sadist.note
- To Naddy. Both discovered their true selves after watching a television program their parents disapproved of, but while Naddy showed this off in public and got disowned for it, Rin hid this from everyone in fear of getting shunned for it.
- To Kishika. Both present themselves as upstanding and well-disciplined in public but secretly have desires they desperately try to keep hidden from everyone around them. When Rentarou and the girls find out about them, they're still willing to be friends with them in spite of that. The main difference is that Kishika's desires are below her age group, while Rin's desires are above her age group.
- Goroawase Number: Her birthday, August 10th (8/10), can be read as ba (8) i (1) o (0), referencing the puns in her name.
- The Ingenue: Subverted. She's had a sheltered upbringing, has been raised to be polite and formal, and has little experience of the wider world, but she hides a fetish for violence, which is about as far from the traditional ingenue's purity as you can get.
- Milholland Relationship Moment: She accidentally lets slip that she's a Nightmare Fetishist to Rentarou in her debut chapter and fears that he'll dump her over it, but Rentarou assures her that he still loves her in spite of it.
- Nightmare Fetishist:
- Seeing a scary movie (from the Resident Evil franchise) at a young age reignited a dormant fetish for blood, gore, and violence. Seeing it in real life or in fiction makes her drool and grin like a madwoman. Fortunately, she's kind enough to never hurt others in real life. Nonconsensually, at least. Rin and Iku bond quickly because Iku loves to be paddled and Rin loves doing the paddling.
- Naturally enough, she's very admiring of Karane's violent outbursts.
- It extends to conceptual violence too, as a Dreadful Musician like Uto doing violence to music also gets her excited.
- Only One Finds It Fun: The only member of the family until Himeka joins who enjoys Uto's music - although that's not because she thinks it's any good, but because it's beyond all repair.
- Parents as People: Rin's father has no issue with her love of violence, but is aware not everyone else feels the same way, so he did his best to tamp down on it to avoid her suffering heartbreak. As a result, when Rin rediscovered her fetish, she kept it secret from her parents, believing they wouldn't approve.
- Perverted Drooling: She tends to drool when indulging in her violence fetish.
- Punny Name:
- With surname first, "Baio Rin" sounds just like Violin, Rin's signature instrument. Since her parents are also violinists, they might have done this on purpose. It also sounds like Violence, Rin's secret fetish.
- "Baio" also sounds like Biohazard, which is the Japanese name of Resident Evil, her favorite franchise.
- Red Eyes, Take Warning: Subverted. Rin has red eyes, but while she may have a violence fetish, she's not in the least bit dangerous.
- Scary Teeth: She has notable jagged teeth, which are more clearly displayed when she's turned on.
- Signature Headgear: She has two long hair ribbons, each tied into a braid on either side of her head.
- Signature Laugh: A creepy "Ee hee hee hee!"
- Slasher Smile: Once Rin gets excited, she'll form a menacing smile that shows off her sharp teeth. People unfamiliar with her find her smile terrifying.
- Strict Parents Make Sneaky Kids: Her family forbade her from watching a scary movie as a child, leading her to explore the horror genre in secret on her phone for the next several years.
- Too Kinky to Torture: She's not above being on the receiving end of violence, as shown when she finds Uto's ocarina playing enjoyably bad, and became aroused when Momiji in Rentarou's body suddenly started groping her chest.
- Video Game Cruelty Potential: Before meeting Rentarou she had never played a video game before and immediately indulges this trope as much as she can in the Arcade.
- Whole Episode Flashback: Volume 14's bonus chapter charts her father's attempts to shelter her from any form of violence as a young child.
- Yamato Nadeshiko: She appears to be one on the surface, but she's secretly a Nightmare Fetishist.
Suu Hifumi
The Number Obsessed Student with No Social Skills
Debut: Chapter 123
Rentarou's 23rd girlfriend. She is a first-year high school student and is obsessed with numbers above all else.
- Brutal Honesty: She's very direct about saying what she thinks, particularly if she doesn't give a shit about something.
- Companion Cube: She's in love with numbers - that is to say, she's in love with each and every number for their own individual qualities, though she doesn't stop there, seeing every version of a number as having their own individual qualities. She likes seeing them as Arabic numerals the best, though she appreciates the other numeral systems too, feeling like it's seeing them in new outfits and hairstyles.
- Deadpan Snarker: Suu can be very snarky when dealing with the other girls' eccentricities, especially if it's Iku.
- Deconstructed Character Archetype: Of the Number Obsessed. She has a lifelong love of numbers to the exclusion of everything else. Not only does this cause her trouble in learning math, but she also can't remember most people's names or even their faces since they aren't numbers, Rentarou and Ahko being the exceptions. The only time she's able to engage with people is if they're able to involve numbers in some way.
- Early Personality Signs: She's had a Number Obsession since kindergarten.
- Elmuh Fudd Syndwome: Had a lisp in kindergarten.
- Foil: To Iku. Both of them have unusual paraphilia, but Iku's has a basis in reality while Suu's is unheard of in real life. Iku always has a cheerful and friendly attitude while Suu is usually cold and snarky.
- Friendless Background: Didn't have any human friends before meeting Rentarou, having no interest in anything outside numbers and being unable to remember people's names and faces. However, she did have the number 7 on her jacket as a childhood friend.
- Good Parents: When little Suu started bawling about being separated from the numbers on the podium at kindergarten, her mother recognized how much the podium meant to her and arranged to take it off the kindergarten's hands so Suu could keep it.
- Good with Numbers: Amusingly double subverted. Though she is obsessed with numbers themselves, she is very poor at actual mathematics because she can't wrap her head around basic arithmetic. To her, 1+1 should equal 11, not 2, since she can't imagine where the '1s' would go. That being the case, she doesn’t have any trouble with counting, and will happily volunteer to count if the need arises.
- Goroawase Number:
- Hi (1) fu (2) mi (3), which in her name is written with the kanji for those numbers. Her birthday is January 23rd, 1/23. On top of all that, she happens to have been introduced in Chapter 123.
- She uses these to get to know the other girls, either using existing number puns or creating new ones.
- Hypocritical Humor: Suu often points out how weird the other girls' quirks are, even though her Number Obsession is pretty strange itself.
- Implausible Hair Color: Grey hair with pale streaks.
- Inconsistent Spelling: The manga's official Twitter spells her name "Su", the scanlation spells it "Suu", and The Other Wiki spells it "Sū".
- Loony Friends Improve Your Personality: She has zero interest in people or anything unrelated to numbers. This gradually changes after becoming a girlfriend; she puts effort into integrating with the group in gratitude for Rentarou taking her love of numbers seriously and, thanks to some help from Ahko, memorizes everyone within a day. Later, when she's taking part in a Fall Guys parody with five other girls, she doesn't understand why everyone's helping each other when it isn't a team game, but quickly takes to heart the idea that it would be more fun to win the contest together.
- Meaningful Name: "Suu" is Japanese for "Number", and "hi-fu-mi" means "one, two, three".
- Mood-Swinger: Suu can go from grumpy to upbeat the moment numbers are brought up.
- No Social Skills: She's blunt and direct in her speech, but she can leave people confused because they don't understand what she's saying or doing. Her sole interest aside from Rentarou is numbers, and she makes no secret of it, or of the fact she doesn't care about anything else. She's also rather obvious about her inability to remember other people.
- "Not So Different" Remark: Loves numbers like Rentarou loves his girlfriends, which he lampshades in her introduction.
- Number Obsession: She has a deep obsession with numbers. She's introduced in Chapter 123 and has a lifelong love of numbers to the exclusion of all else. She's so obsessed with numbers that it even interferes with her understanding of mathematics—for example, to her 1+1 should equal 11, not 2, since she can't imagine where the 1's would go.
- Odd Friendship: With Ahko. Suu is a prickly, number-obsessed girl with No Social Skills while Ahko is a low-energy shopaholic gyaru who wears her heart on her sleeve, but they get close enough while Ahko's helping Suu learn how to remember the rest of the harem that Suu doesn't need a mnemonic to remember her, and Ahko very much appreciates what that says about their relationship even if Suu herself may not quite realize it. On top of that, Suu values Ahko's opinion as much as she does Rentarou's.
- Older Than They Look: She's short enough that she can participate in a competition for youngsters alongside Shizuka, Chiyo, Momiji, and the Yakuzens.
- O.O.C. Is Serious Business: Suu usually turns cheerful whenever a number is mentioned, but she remains very solemn when she reminds everyone that Rentarou can only marry 1 of them, not all 25 of them.
- Photographic Memory: She can remember numbers in any form without any difficulty, from knowing where certain numbers are located to extracting numbers recited from a list.
- Straight Man: She occasionally provides remarks of this nature, thanks to her grumpy nature.
- Strong Family Resemblance: She looks similar to her mother, although her mother doesn't have glasses (at least not when Suu was in kindergarten) or pale streaks in her hair.
- Third-Person Person: Talks like this in the original Japanese, possibly because of her love of numbers (Suu means "number") and/or her lack of social skills.
- Tsundere: An odd variation. She is very cold to Rentarou at the start but absolutely melts into happiness whenever numbers are brought up. More generally, she's tsun to most non-numbers and dere to numbers.
- Whole Episode Flashback: Volume 15's bonus chapter is about Suu and her first loves, the numbers on the victory podium at kindergarten.
- You Are Number 6: Parodied. She acts on Ahko's suggestion to associate numbers with each of the girls, resorting to puns as opposed to ranking them by a certain metric. Ahko herself is the sole exception.
Eira Kaho
Debut: Chapter 132
Rentarou's 24th girlfriend. She is a second-year university student and half-Japanese, half-Brazilian. She is an extremely strong martial artist but is plagued by numerous phobias.
- Absurd Phobia: She's scared of anything she can't beat up. This either means anything so small or immaterial she simply can't kick it (germs, ghosts, being late) or anything so fragile she fears a mere touch will kill it, never mind a kick (babies, Shizuka). In contrast, she has no fear at all of anything she can beat up (oncoming traffic).
- Action Girl: She can easily take down things she's not scared of.
- Afraid of Their Own Strength: Though she could physically take out small animals and children with a kick, she cannot do so morally so they terrify her instead.
- Afraid to Hold the Baby: Her fear of babies comes from this, worrying she'll hurt them if they get too close.
- As Long as It Sounds Foreign: After Rentarou points out that her first name is unusual, she "explains" it by revealing she is half-Brazilian. Except Eira would be just as weird of a first name in Brazil as it is in Japan. The real reason, obviously enough, is that it is a Punny Name.
- Bully Hunter: Eira won't hesitate to fight anyone who attacks an innocent. When she was a kid, she would kick other kids who were bullying her friend.
- But Not Too Foreign: She is the first girlfriend that's not purely Japanese, being half-Brazilian. She was raised in Japan but her Brazilian father taught her capoeira.
- Charles Atlas Superpower: Able to stop an approaching car or bulldozer with a single kick and suffer no backlash.
- Cowardly Lion: Thanks to her martial arts training, she will not hesitate to deal with scary things that can be beaten with capoeira, including moving cars. Additionally, seeing other people afraid overrides her own fear as she acts to protect them.
- Deconstructed Character Archetype:
- Of Charles Atlas Superpower. She's perfectly trained in the art of capoeira and is more than capable of using it as she needs to. However, this becomes a case of Crippling Overspecialization to the point where she's absolutely terrified of anything that can't be dealt with through capoeira.
- Also When All You Have Is a Hammer…, taking the idea of the badass who's terrified of enemies they can't hit (like ghosts) and extrapolating it so that she's scared of anything she can't hit.
- Expository Pronoun: Atashi, in keeping with her casual style.
- Fashionable Asymmetry: Her initial outfit has her jeans full length on the left leg and cut off on the right. She also lets a strand of hair down the right of her face.
- Fearless Fool: When she was younger, she thought anything could be taken out with a kick, including colds, so she charged into situations without fear of the consequences.
- Fear of Thunder: She can't kick thunder, so it terrifies her.
- Foil:
- To Kishika. Both of them initially present as capable, mature Action Girls with contrasting styles (Kishika wears formal 17th century clothing, while Eira goes for modern casual. Kishika practises kendo, a Japanese martial art using wooden or bamboo swords, while Eira practises capoeira, an unarmed Afro-Brazilian martial art that focuses on use of the legs.) but if their buttons get pushed they reveal their other sides - for Kishika, being shown affection causes her to descend into infancy, while for Eira, encountering something she can't fight causes her to fall over in terror. Naturally, the two have a duel when they first meet.
- To Uto. Eira is regularly tormented by her fears and anxieties, but is competent and mature when they're not bothering her, while Uto is calm and takes most things in stride, but starts panicking when she's startled or scared. Uto's philosophical outlook helps relieve Eira's anxieties.
- Freudian Excuse: When she was a kid, her father used a Bedsheet Ghost to teach her that not everything could be dealt with by attacking it, resulting in her being terrified of literally anything that can't be taken out with a kick.
- Heir to the Dojo: A flashback in Chapter 138 shows that she's slated to inherit her father's dojo and become an instructor. One of her anxieties is whether she's up to the job.
- Heroic Self-Deprecation: Drifts into this during Chapter 138, reflecting that she had to be bailed out by Chiyo, Uto, and Rin, all of whom are middle-schoolers.
- Implausible Hair Color: She has light grey hair despite being only a few years older than Rentarou.
- Insecure Love Interest: She notes how weird a college student dating a high schooler would be after confessing to Rentarou. After that, she assumes the worst and immediately freaks out at the thought of rejection; closing her eyes, covering her ears, and loudly singing to try and ignore his response.
- Kick Chick: Uses powerful kicking moves from her capoeira practice.
- A Lesson in Defeat: In elementary school, Eira was extraordinarily reckless due to her belief that anything, even catching colds or strong river currents, could be beaten with a kick. Concerned, her father scared her with a Bedsheet Ghost that she couldn't just kick into submission to try and teach her to fear what she should fear. The whole incident ended up working too well; as an adult, Eira has an Absurd Phobia of anything she can't attack with kicks, be it lightning, germs, ghosts, or babies (due to being so fragile that a mere touch would break them, nevermind a kick).
- A Lesson Learned Too Well: When Eira learned that not everything can be taken out with a kick, rather than just learning to be more cautious, she becomes paralyzed with fear if she ever encounters anything she can't kick.
- Mad Libs Catchphrase: "I can't take out [X] with a kick!"
- Meaningful Name: Read surname first, Kaho Eira sounds similar to Capoeira.
- Negatives as a Positive: Chiyo, Uto, and Rin point out that Eira being a scaredy cat leads her to empathize when others are afraid, even driving her to forget her own fear if need be. Uto goes so far as to say cowardice is her strength.
- Nerves of Steel: As paradoxical as that sounds. Despite being deathly afraid of anything physical force can't be used against, Rentarou takes note of the fact that she doesn't fear getting hit by a car at all. She's not afraid of something like that because it can be kicked, as she casually explains.
- The Paranoiac: Getting attacked by animals if you interact with them, the idea of getting rejected during a love confession, hypothetically saying "goodbye" to her new boyfriend immediately after they become an item, fearing she'll kill a baby from a light touch, etc.
- Pedestrian Crushes Car: Cars are one of the few things she's not afraid of because she can kick them so hard they stop moving. She does so on multiple occasions.
- Performance Anxiety: She's always had trouble performing in front of a crowd.
- The Pratfall: Exaggerated. She somersaults backwards if she sees something that scares her.
- Punny Name: Her full name under the Japanese order convention is Kaho Eira, and under the original Japanese kana spelling, it's literally one punctuation away (in "ho") from becoming Kapo Eira, as in Capoeira, the martial art she practices as part of her half-Brazilian heritage.
- Significant White Hair, Dark Skin: She's a silver-haired Brazilian who's a master capoeira practitioner, notable for being the first college student to join Rentarou's harem, the first to be half-Japanese, and the first whose birthday is firmly established.
- Terrified of Germs: She can't kick germs, so Eira is scared of getting sick. She makes a habit of carrying bandages with her at all times, though they tend to fall out of her pockets when she tumbles over.
- When All You Have Is a Hammer…: Deconstructed. If there's an issue presented to her that can be kicked (like a moving car), then there is no issue. If the problem can't be kicked, she'll fall on the ground and scurry away in sheer terror.Rentarou: As strong as your physical stats may be, you're totally open to special attacks.
- Whole Episode Flashback: Volume 16's bonus chapter is about how Eira developed her fear of anything she can't take out with a strike.
- Why Did It Have to Be Snakes?: Eira has many fears! Bugs, thunder, darkness, cats, dogs, and babies are just the start of the list.
Tama Nekonari
Debut: Chapter 141
Rentarou's 25th girlfriend. She is a 21-year-old former office worker who grew so miserable in corporate life that she decided to live life as a cat, complete with ears, paws, and tail.
- Abandoned Pet in a Box:
- Rentarou meets Tama when she's in one of these. She put herself there hoping to get adopted because she ran out of money and wants someone to take care of her.
- Hahari subsequently leaves her like this in an attempt to get her up off her feet and looking for a job again.
- Animal Motifs: Went all-in on living as a cat, both in appearance and behavior.
- Be Careful What You Wish For: She finally gets the Lazy Bum life she wanted in Chapter 147, only to find her guilt over not working getting in the way.
- Brutal Honesty: Tama is completely upfront about herself and her motives... which is a bit of a problem when she keeps telling job interviewers she doesn't want to work.
- Buxom Beauty Standard: Despite how short she is, Tama is very well-endowed (Momiji reveals her cup size is second only to I-cup Hahari in Chapter 171). She's a frequent subject of Momiji's groping, and Momoha is surprised that Tama never had sex despite her "ballistics."
- Cat Girl: Invoked. She's human but she believes life as a cat is better than being a human. She wears cat ears, a cat tail, and a sweater with cat paws on the sleeves (though she removes everything around outsiders). Art-wise, she looks indistinguishable from an actual cat girl, with her ears and tail matching her movements and feelings as though they were real. Some shots even make her look like a giant cat.
- Cats Are Lazy: Tama's main motivation for becoming a cat, as she thinks it's better than work.
- A Day in the Limelight: Chapter 147 spotlights what happens when she gets a job as Hahari's cat.
- Death Seeker: Seems well aware that nobody would actually believe she is a cat, let alone be willing to adopt her (read:let her mooch off them). So if her adoption scheme didn’t work, she would be resolved to die and accept her fate. The whole reason she even tried living as a Cat Girl was because she is suicidal and wants to reincarnate as a cat.
- Deconstructed Character Archetype:
- Of the Lazy Bum. Tama struggled with studying and working her entire life to the point where it nearly drove her to commit suicide so she could be reincarnated, but because she was afraid she'd end up struggling in her new life too, she decided to quit her job and become a cat in this life instead. Additionally, while she wants to kick back, relax, and be coddled, she's considerate of others and doesn't want to be a burden on them, so she can tolerate working if it's for Rentarou's sake.
- Also of the Cat Girl. They don’t exist, and somebody would have to be seriously depressed to want to forsake their humanity and live like a stray cat.
- Desperately Looking for a Purpose in Life: Tama's of the variant that finds their life empty and doesn't have a greater ambition to aim towards or find study and work meaningful in themselves. Becoming a cat got her out of the struggle of working but it didn't give her meaning; it wasn't until she met Rentarou that she found a motivation in life (getting pampered by him).
- Didn't Think This Through: She quit her job without considering the fact that she needs money to live, and put herself up for adoption as a cat to get a new food source.
- Driven to Suicide: Very nearly was, believing she'd reincarnate into a better life as a cat. Fortunately, she decided she couldn't risk failing and decided to become a cat more directly.
- Early Personality Signs: She was struggling to cope as far back as elementary school. She wanted to be a cat for exactly the same reason she does as an adult: They don't have to work or learn and can just laze about.
- Expressive Accessory: Tama's ear and tail accessories move as if they really are a part of her body.
- Foil:
- Mei is associated with dogs and takes her job as a maid extremely seriously, to the point of offering to do dangerous or unhealthy things to herself. Tama is associated with cats to the point she's sunk her identity into becoming one and tries to avoid any kind of work or effort whatsoever.
- Both Tama and Uto insist that they are something they are really not, but Uto is just a chuunibyou and otherwise all right, while Tama is so depressed that she has considered suicide — more than once — only decided against it to avoid risking even more pain, and her forsaking her humanity and insisting that she is a cat is both a sign of how messed up she is and a serious cry for help.
- Fun T-Shirt: After deciding to become a cat, she wears a sweater with the kanji for 'cat' on it in her cat persona, and a t-shirt with the kanji for 'person' on it in her human persona.
- Honor Before Reason: She'd literally rather die pretending to be a cat than go back to work. Rentarou's love gives her the motivation to tolerate a part-time job so she can keep living just to see him.
- Human Pet: After she settles in, everyone effectively treats her as the family pet, courtesy of her commitment to living as a cat.
- Implausible Hair Color: She has white hair at the age of 21 without any obvious reason, whether medical or magical.
- Lazy Bum: She hated her job so much that she stopped coming into work and decided to live life like a cat; to be more precise, she thought her job was so soul-crushing that human life is mere survival without any fulfillment or happiness whatsoever, and that such an existence would not be worth living, so she hoped she would reincarnate as a cat when she died, being well aware that most stray cats just starve to death or die of exposure. She found life so unbearable that this was an acceptable risk.
- Liberty Over Prosperity: Her old job as an office worker seemed to pay pretty decently, but Tama believed it didn't grant her enough freedom to make it worth it.
- Meaningful Name: "Tama" is a common Japanese cat name, while "Nekonari" means "become a cat".
- Mirror Character: Naddy pretty much immediately latches onto her as someone else who's decided to be what they want to be.
- Morton's Fork: Tama is in an unfortunate situation where her desires are at complete odds with each other. She hates working because it's a struggle and just wants to slack off, but if she does nothing but slack off, she feels guilty over doing nothing.
- Office Lady: Lived as one for some time, growing more and more disillusioned.
- One Head Taller: Particularly noticeable in Tama's case, as she's at least a head shorter than other adult women. Some group shots show Tama is about the same height as the shortest people in the family like Kusuri or Chiyo.
- Parents as People: Her mother was sympathetic to her struggles, but told her to keep persevering like everyone else because she couldn't live a coddled life without struggle, not realizing how bad it was for her.
- Serious Business: Being a cat. In Tama's mind, to properly become a cat you need to discard your pride as a human being, then observe cats, imitate them, learn from them, and stop any and all human activity. (She's not entirely being a hypocrite here, as she herself admits she still has some human vestiges.)
- The Teetotaler: She doesn't normally drink since cats get drunk off catnip.
- There Are No Therapists: While her mother was right about most people needing to work in order to support themselves, her words did nothing to help Tama with what can only be assumed to be severe depression. There's no evidence that she ever spoke to anyone besides Rentarou about her struggles either.
- Third-Person Person: One of her defining speech habits. As a human, however, she uses watashi instead.
- Verbal Tic: As a Cat Girl, her speech is littered (ahem) with meows, purrs, cat puns, and Trrrilling Rrrs. In the original Japanese, she uses cat puns (mainly substituting 'nya' for similar syllables) and nyans at the end of her sentences; the trilling and purring is courtesy of the scanlators.
Himeka "Kiki" Saiki
Debut: Chapter 150
Rentarou's 26th girlfriend. She is a first-year high school transfer student and a genius Idol Singer who desperately wants to be seen as abnormal.
- Broken Pedestal: Downplayed. None of Kiki's fans in the harem despise Himeka's true colors, but Kurumi is weirded out by her desire to appear abnormal, though even she can't help but think she's kind of cool.
- Bunny-Ears Lawyer: She tries to invoke this by doing weird things so she'll look like an abnormal genius. However, her attempts at looking weird just make her look like an idiot instead.
- Child Prodigy: Himeka has been a talented singer since her childhood.
- Compliment Backfire: Since Himeka thinks Freaky Is Cool, she's being complimentary when she calls someone abnormal, but most people assume she's insulting them. Even people who do know what Himeka means feel a bit uncomfortable with her comments.
- A Day in the Limelight: Chapter 158, which sees her ask Uto to help her learn how to be abnormal.
- Deconstructed Character Archetype: Of I Just Want to Be Special. Himeka has been called a genius her whole life, to the point where it doesn't make her happy anymore. To that end, she tries to act abnormal to make herself stand out. However, since she's actually a sensible person, her attempts at being abnormal end up making her look stupid instead of weird.
- Distinctive Appearances: Aside from her eyes, she also has a pattern of stars resembling a diadem or crown across her hair.
- The Ditz: Subverted. Himeka initially seems like she's Lethally Stupid when she suggests treating a scrape by pouring sparkling water on it and covering it with a sticker, but when she actually treats one, she uses regular water and a bandage. Himeka is trying to make herself seem abnormal, but her attempts at being weird just make her look dumb instead.
- The Diva: She's called an utahime (lit. "song princess", usually translated as "songstress"), the Japanese equivalent of a diva, and she has the talent and confidence to live up to it. Catch is, she takes being a genius so much for granted she feels the need to make herself stand out some other way.
- Exotic Eye Designs: Zig-zagged. Himeka has normal pupils, but she also has a constant twinkle in her eyes, which sometimes makes her pupils look star-shaped.
- Expository Pronoun: Watashi, reflecting how she's fundamentally sensible at heart.
- Foil:
- To Meme. Himeka wants to be abnormal so she can stand out, while Meme does everything she can not to stand out. Himeka's attempts to make herself seem abnormal just make her look inept, while Meme's attempts to not be noticed just draw more attention to her.
- To Chiyo. Their initial interactions with Rentarou and the other girls revolved around their reactions to everyone else's bizarre quirks. While Chiyo took issue with the others' eccentricities and tried to shoehorn her way of order into the group, Himeka wasn't keen on getting to know the other girls until she got to see their eccentricities and embraced them.
- To Uto. Uto seems comfortable with her status as a Dreadful Musician but is secretly aware of how bad she is, while Himeka makes no secret that she wants to be abnormal. Uto struggles to improve no matter how much she practices, while Himeka can't make her songs abnormal no matter how hard she tries.
- Freaky Is Cool: Himeka is a firm believer in this, as she thinks being abnormal is cool. She even refuses to date Rentarou because she thinks he's an ordinary student. Finding out he has 25 other girlfriends instantly makes her ask him out.
- The Heart: An Idol Singer's iconic role is inspiring others, and Himeka excels at it, convincing people they're capable of being better than they think they are.
- Heroic Self-Deprecation: Since she takes her talent for granted, she doesn't think she's genuinely amazing, she only appears to be amazing. Uto muses that it's an egotistical line of thought, being in a position to dismiss her own talent like that.
- Horrible Judge of Character: Zigzagged. She doesn't see any of Rentarou's girlfriends as out of the ordinary when she first meets them, but she immediately eats her words as the girls show off their bizarre quirks one by one. Once she's got to know them, however, she's very good at assessing their capabilities (e.g. her assessment of Meme in Chapter 153).
- Idol Singer: She's first introduced as one before Rentarou meets her in person.
- I Just Want to Be Special: She's been called a genius for so long that being called one doesn't make her happy anymore. She'd rather be seen as an abnormal genius.
- Innocently Insensitive: Himeka means no offense when she calls someone abnormal, but since most people don't like being called that, she comes off as rude and insulting.
- Insult Backfire: Being called weird is exactly what Himeka wants since she wants to be seen as abnormal.
- Meaningful Appearance:
- The way Himeka's pupils switch from being normal to star-shaped reflects how she wants to be seen as abnormal even though she's actually quite sensible.
- Her appearance in her school uniform is rather plain compared to the other girls, as she just wears a white shirt, a skirt, and a tie, with the most distinctive part about her being the twinkle in her eyes and the star pattern in her hair. This reflects Himeka's belief that she doesn't stand out and her desire to be abnormal.
- Meaningful Name: Himeka roughly translates as "princess (of) song" (switching the kanji in "utahime"), Saiki as "weird talent", and Kiki, her Stage Name, as "weird princess", all of which reflect some part of her character.
- Mutual Envy: She admires Uto's effortless eccentricity, to the point of asking her to be her mentor and thoroughly enjoying the entire process. However, Uto herself envies Himeka's natural talent, even trying to call off the mentorship because compared to Himeka, she's just a 'fraud.'
- New Transfer Student: She recently transferred to Rentarou's school in her introductory chapter.
- Obfuscating Stupidity: An accidental example. Himeka says and does stupid things because she thinks they make her look abnormal when they just make her look like a moron instead.
- Pride: Has absolutely no trouble casually describing herself as a genius; to her, it's just how she is. What she really wants is for people to see her as an abnormal genius, and she gets smug whenever it happens.
- Smug Smiler: Whenever someone points out how weird Himeka is or Himeka thinks she's being weird, she makes a really smug smile since she wants to look abnormal.
- Stage Names: Kiki is the name she goes by when she sings. Her actual name is Himeka Saiki.
- Talented, but Trained: Himeka may be a prodigy, but she puts the work in too, attending after-school idol lessons.
- Your Approval Fills Me with Shame: The other girls feel a bit uncomfortable when Himeka compliments them for being abnormal. Their reaction to realizing Himeka was being complimentary is to feel like just taking the compliments would be conceding something.
Matsuri Dei
Debut: Chapter 159
Rentarou's 27th girlfriend. She is a first-year at Ohanamitsu Middle School who wears Gothic Lolita fashion and loves Japanese Festival culture. She also has a major foul mouth, despite looking so prim and proper.
- The Baby of the Bunch: She's in the same class as Chiyo, who is already mentioned to be 12 years old.
- Berserk Button: Matsuri's hot temper comes from her pride; if you challenge her on something she's proud of, or if she even thinks you're trivializing what's important to her and her friends, she's going to let you have it.
- But Not Too Foreign: Her father's Japanese and her mother's English.
- Character Catchphrase: "Teyandei ba-ro chikusho", roughly "da hell idjit damn". The scanlation uses riffs on "you wot, ya daft sod?" (in more familiar English, "What you going on about, you daft idiot?").
- Clothing Reflects Personality: She thinks this is what she's doing, her clothes reflecting her love of festivals; to outsiders, she just looks like an uncharacteristically boisterous Elegant Gothic Lolita.
- Custom Uniform: In a school that embraces Non-Uniform Uniform, Matsuri still manages to stand out, wearing a Gothic Lolita outfit modelled on the middle school uniform: a Gothic Lolita headdress, a sleeveless jacket with a frilled hem, a sleeveless shirt with a ruffle collar, a large neck bow with long tails, a pair of wrist cuffs, a short crinoline, opaque fishnet tights, and platform shoes, all in the uniform's colors. It's not terribly surprising to learn Hahari signed off on it because it was cute.
- A Day in the Limelight: Chapter 164.
- Deconstructed Character Archetype: The typical Elegant Gothic Lolita in fiction is usually presented as if they're middle or upper class, with the polite speech to match. Matsuri is working class, and speaks very informally with lots of casual swearing. She doesn’t even understand what Gothic Lolita is, thinking these are just English clothes that her parents gave her.
- Don't You Dare Pity Me!: Matsuri gets mad when Chiyo says the former's yakisoba was better than hers because she thinks Chiyo's pitying her.
- Elegant Gothic Lolita: While she dresses like this, she's completely unaware about Gothic Lolita fashion; her parents made her clothes for her, saying they were like English festival wear.
- Establishing Character Moment: Despite speaking in an extremely rude dialect, she's quick to help cheer up a lost child at the festival.
- Exotic Eye Designs: The highlights in her eyes are shaped like flowers or four-leaf clovers.
- Expository Pronoun: Atei, a variant of atai, fitting her rough, brash attitude.
- Family Business: Her family have run a yakisoba stand for generations, and she's extremely proud of the quality of her yakisoba.
- Festival Episode: She and Rentarou meet when she is working at her grandparents' yakisoba stall at a festival, and her limelight chapter in Chapter 164 takes place at another festival.
- Foil:
- To her classmate, Chiyo. Both of them are the actual youngest girls in the family, but Chiyo is polite and formal while Matsuri is crude and casual. Chiyo wears the standard uniform at school while Matsuri wears a heavily customized one. Chiyo is usually kind but becomes aggressive if her OCD is triggered, while Matsuri is usually boisterous but occasionally shows a more bashful side.
- To Mimimi. Neither Mimimi or Matsuri are ojous, but they both look the part. However, while Mimimi actively works at portraying herself as an ojou, Matsuri was entirely oblivious she was dressing like an ojou, and has no interest in behaving like one.
- A Friend in Need: Helping people is second nature to Matsuri, and she often draws on her knowledge of festival activities to do so.
- Global Ignorance: Despite being half-English - and the daughter of two fashion designers - she's clueless about actual English fashion; Rentarou has a better idea of what she's wearing than she does. It turns out she's not much better with fashion from elsewhere in the world, thinking Eira's midriff-baring top is a Brazilian happi.
- Insult of Endearment: Calling people a "daft sod" would normally be an insult, but due to Matsuri's upbringing, that's what she calls everyone, as it's meant to be neutral or affectionate. When she's actually mad at someone, she calls them a "berk" instead.
- Life of the Party: Matsuri loves festivals, to the point where she once wished for an everlasting one.
- Meaningful Name: Matsuri literally means "Festival". Her surname "Dei" sounds like "Day", making her full name "Festival Day".
- My God, What Have I Done?: She suffers this in Chapter 164 after she wishes for an unending festival, because it caused her fellow festival goers to enjoy the festival at the expense of their normal desires .
- Only Sane Man: Overlapping with Straight Man. Matsuri's one of the more practically-minded members of the family, and tends to comment on the others' weirdness from that point of view.Iku: Try throwing it [a ball] at me, next!Matsuri: 'Cuz you wanna play some catch, ey? Right? That it?
- Pride: Matsuri holds a lot of pride in her yakisoba and doesn't take kindly to anyone besides her family outdoing her in making it, though with Chiyo she's able to move past it when Chiyo gets the chance to explain herself.
- Raised by Grandparents: Her parents are fashion designers traveling abroad, so she was raised by her Japanese grandparents.
- Rich Language, Poor Language: In contrast to most of the cast, she uses the Shitamachi dialect, which is a low town working class dialect (albeit one old enough that it's used mostly in fiction as a joke). Combined with her being half-English, the scanlators chose to translate it as Cockney complete with rhyming slang.
- Serious Business:
- Matsuri initially hates couples because they only pay attention to each other at festivals instead of enjoying the attractions, which she takes very seriously. It takes Rentarou trying all the stalls, games, and food to convince her how serious he is.
- She's invested in her yakisoba, coming from a family of yakisoba cooks, and won't be outdone by anyone outside her family.
- Signature Headgear: Her Gothic Lolita headdresses.
- Sir Swears-a-Lot:
- Learned to swear constantly from her Japanese grandparents. She even uses rude pronouns when speaking to others, though she's trying to be cheerful instead of spiteful.
- In the scanlations her go-to is "daft sod"* for casual use, and "berk"* when she's being more serious.
- Sleeves Are for Wimps: Matsuri is a boisterous young girl who prefers to keep her sleeves rolled up or go sleeveless, even on her gothic lolita outfits, which typically have long sleeves. When she was turned into a baby, one of the first things she did was roll up her own sleeves.
- Unintelligible Accent: Quite a few readers had trouble understanding the thick Cockney accent the scanlators gave her, many being unfamiliar with the slang she uses. Some mistook it for other British accents entirely, such as Scottish. As a result, she ended up getting ranked with Naddy and Uto for incomprehensibility.
- Verbal Tic: In Japanese, she adds "dei" to the end of her sentences, shorthand for "desu".
Shiina "Usa-chan" Usami
Debut: Chapter 168
Rentarou’s 28th girlfriend, who first appears on the rooftop with the rest of the Rentarou family while he's busy, acting as if she was always with the group and tricking the others into thinking they just overlooked her. She's a second year high school student who can't bear to be alone. Is referred to by the others as "Usa-chan" at her request.
- Animal Motifs: It's subtle, but she has a rabbit motif to her. Her hair is styled in two large horns resembling rabbit ears, she has numerous rabbit accessories on her outfit, she has prominent upper teeth, and she runs like a hare. Personality-wise, she shares a similar trait with rabbits in that she Hates Being Alone, her behavior directly being compared to how some rabbits are known to die from being isolated. Whether she has any relation to the similarly themed Newbie Idol is unknown.
- Animal Stereotypes: Rabbits are highly social animals who don't take loneliness or loss well.
- Artistic License: When explaining her issues to the Rentarou Family, she specifically says she has "Reverse Trypophobia". The reverse of a dislike of multiple holes would be more accurately "Trypophilia" though, with what Usa-chan is describing more accurately being "Kenophobia", being a fear of open spaces, and "Autophobia", being anxious when alone.
- Bavarian Fire Drill: Joins the family as if she'd always been there, getting away with it because none of the other girls are willing to call her out. It's only when Rentarou himself asks who she is that she's busted.
- Deconstructed Character Archetype: Of Hates Being Alone. Her fear of being alone is so strong that she ended up stalking Rentarou and his girlfriends before she had any reason to believe that she was one of his soulmates. When she slips into the crowd, all the girls are disconcerted about her knowing so much about them despite never meeting her before. When Rentarou learns the truth, the All-Loving Hero tells her that he’ll only let her join if it’s because she has feelings for him and not just because of all the other girls he’s dating. Her fear of being alone is near-crippling too, as she nearly has a panic attack when on a nearly empty train platform until Rentarou gives her a Cooldown Hug, and she makes mention of having accidentally driven other friends away with how clingy she can be in her desperation to not be alone.
- Distinctive Appearances: In addition to her rabbit motif, she has red eyes and black hair with numerous pink streaks.
- Expository Pronoun: The default watashi.
- Eyes Always Shut: In her introductory chapter, her eyes are continuously shut, with the exception of when she shows her own photo of Rentarou. This makes it hard to tell if she's actually a soulmate since, when Rentarou does meet her for the first time, her eyes are still shut, and as Hahari and Mei proved the "Zing" won't occur unless direct eye contact happens. She does open them in the next chapter, and she does catch a Zing with Rentarou.
- Foil:
- Usa-chan struggled to make friends due to stalking them and getting clingy, while Meme struggled to get people to not pay attention to her.
- Like Eira, her life's dominated by her phobia, but Eira's dealing with things she can't handle physically while Usa-chan's dealing with things she can't handle emotionally.
- Forms a natural contrast with her fellow 2nd Year, Mimimi. Mimimi has long, blonde hair; Usa-chan's hair is black and shaped into upright 'bunny ears.' Mimimi focuses on beauty, ergo emphasizing individual characteristics and distinguishing features. Usa-chan focuses on commonality and the sense of a group over its constituent parts. In spite of this, both of their debuts focus on an incident of them being vulnerable and seeking fellowship with another person and facing rejection. (Perceived rejection only, in Usa-chan's case)
- Both Usa-chan and Ahko Hate Being Alone. This drove them to hang out with people who didn't actually care about them (or even knew they existed) so they wouldn't feel alone: Usa-chan stalked the Rentarou family, while Ahko hung out with her former friends even though they mistreated her. Both finally found real friends when they formally join the Rentarou family.
- Friendless Background: She mentions that she had attempted to make friends in the past, but she constantly failed due to her stalking them and making them uncomfortable.
- Hates Being Alone: Usa-chan can't handle being alone, her behavior directly compared to how some rabbits can die from loneliness. Being in open spaces can easily send her into a panic, seeing empty spaces and isolated things freaks her out to the point of buying stuff to keep things from being lonely, and the idea of being alone causes her to find cramped spaces filled with people to squeeze into so as to not feel isolated, suggesting she suffers from both autophobia and kenophobia. It's because of this she's initially attracted to the Rentarou Family, as they are such a large and tight-knit group, they seem like the perfect way for her to not be alone, and is overjoyed when they accept her since she now no longer feels alone.
- Huge Schoolgirl: Downplayed. She's nowhere near as tall as Yamame, but she's on the tall end of the various girlfriends despite only being a second year like Mimimi, being half a head taller than Rentarou.
- Last-Name Basis: An informal version, with her asking everyone to call her "Usa-chan". Rentarou calls her "Usami-senpai" before she joins the Family, and afterwards calls her "Usa-chan-senpai". Momiji refers to her as "Usa-chan-san".
- Lonely Doll Girl: Due to her crippling lack of friends, Usa-chan reveals in Chapter 172 that during her down-time she would have conversations with her favorite stuffed animal. Said stuffed animal has a playback function built into it, so she would essentially be talking to herself.
- Morton's Fork: She hates being alone and always wants to be with other people. However, she gets so clingy when she finds a friend that she ends up driving them away. The family are the perfect solution as far as she's concerned, because they're already super-clingy.
- Mysterious Stranger: Introduced as a mystery, showing up out of the blue without introduction or explanation, and already familiar with Rentarou and the girls despite none of them recognizing her, before her identity's revealed in the next chapter.
- Punny Name: Her name is based on a portmanteau of "usagi"note and "samishii na"note .
- Remember the New Guy?: Parodied. When she debuts in Chapter 168, she looks and acts as if she was already part of the Rentarou Family, expressing familiarity with everyone. Every time one of the girlfriends interacts with her though, they briefly pause from a feeling of uncertainty over whether they actually know her (Momiji even groping her and realizing she felt unfamiliar), but are willing to brush it off since Rentarou tends to bring new people into the group all the time, something Suu lampshades by wondering if this girl is Girlfriend #28. It helps that she knows everyone else's names and characteristics, that her photo of Rentarou seems to have genuine love behind it, and that gets support from Nano stating the odds of anyone outside their family taking it would be close to 0. It's only when Rentarou shows up and expresses confusion over who she is that the girlfriends realize that their intuition was right and they don't know her.
- Stalker with a Crush: Implied initially but ultimately downplayed. She's intimately familiar with all of the girlfriends and their quirks despite none of them actually knowing her, and she acts genuinely in love upon pulling out the photo of Rentarou she has, because she's been stalking the entire Rentarou Family and fallen for their mutual love, rather than actually falling in love with them, until she and Rentarou lock eyes. It's for that reason Rentarou initially turns her down, since he feels he doesn't deserve to date someone who doesn't truly love him, prompting Usami to make clear she does truly love him and kiss him after he spent so long trying to chase after and comfort her.
- Technicolor Eyes: Red eyes, as part of her rabbit motifs; rabbits are known for red eyes, which for them is a sign of albinism.
- Wingding Eyes: When she's finally accepted into the Rentarou Family and surrounded by the other girlfriends, she gains heart eyes.
