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Main Characters
Yoshiko Hanabatake
"Even death can't cure idiocy."
— Yoshiko in episode 2 of the anime
Voiced by: Aoi Yūki
The titular idiot girl, notorious throughout her neighborhood and school for her sheer stupidity, both in academics and social interactions.
- Abhorrent Admirer: As far back as their childhood, she really wants to be A-kun's wife. He refuses to return the favor, what with her sheer stupidity and shamelessness.
- Achievements in Ignorance: Scoring zero points on a multiple-choice test is incredibly hard to do and seemingly only works because of Yoshiko's enormous anti-talent in math. Doubles up as Epic Fail, although Yoshiko seems to be rather proud than ashamed. note
- Ambiguously Bi: She does have an incredibly unhealthy obsession with A-kun, but she also frequently gropes the other girls vigorously and even made out with Sayaka in the manga. Considering how stupid she already is and how much of what she does runs on Insane Troll Logic, it's hard to say if she really is bisexual or not.
- Animal Motifs: The monkey, on account of her shockingly low IQ and a fondness for bananas.
- Anti-Role Model: The neighborhood children are quick to pick up on the fact that Yoshiko is not someone to look up to. They enjoy her company as a playmate, but even they know she needs to do her schoolwork.
- Anthropomorphic Personification: Of idiocy. The title refers to this and she comes with almost all possible stupidity tropes in the book: The Ditz, Idiot Hero, Insane Troll Logic and Too Dumb to Live.
- Attractive Bent-Gender: As "Yoshio", who manages to capture the heart of Oshieda-sensei.
- Attention Deficit... Ooh, Shiny!: Has the attention span of a spastic squirrel, especially when bananas are involved.
- Berserk Button: Diss anything about bananas or mess with her friends, and your ass is going down!
- Blonde, Brunette, Redhead: The Redhead to Sayaka's Blonde and the Iinchou's Brunette
- Book Dumb: She sucks so bad at school, especially math, that she should be awarded a medal.
- Brainless Beauty: She's reasonably attractive and has the mental acuity of a drunk ant.
- Butt-Monkey: She gets hit by A-kun at regular basis.
- Cloudcuckoolander: To say that she doesn't have a fair grasp on reality is beyond an understatement.
- Comically Missing the Point: Many of the show's gags come from the fact that she doesn't understand the most simple things and freaks everybody out with them.
- Crouching Moron, Hidden Badass: She effortlessly takes down a group of delinquents with ease. And hurls a bear away.
- Dirty Kid: Even as a five-year-old, she was more than eager to jump into A-kun's pants at every opportunity.
- The Ditz: The main premise of the show is her being world-class stupid, however this get played up (when she's Too Dumb to Live) and down (Genius Ditz), depending on the episode.
- Dumbass Has a Point: She was right to point out that Fuuki-Iinchou was trying to grope A-kun and the latter even supported her claims, for once.
- Epic Fail: Scoring zero points on a multiple-choice test requires a huge amount of anti-talent. Or actual effort into failing it. See Achievements in Ignorance.
- Establishing Character Moment: Her first appearance has her showing off zeroes on all of her tests, and when A-Kun says she's too dumb to survive society (which isn't necessarily wrong, all things considered), she freaks out and says her last wish... is to eat a banana. Yeah, thats sums up all you need to know about her.
- Fan Disservice: She oftentimes strips down to her underwear in front of A-kun, and is also the greatest source of Panty Shots in the series. Such scenes are not so much played for fanservice as much as they highlight her sheer stupidity and/or shameless attempts to seduce A-kun.
- Fearless Fool: There are certain times when Yoshiko's so dumb she doesn't seem to process that she's supposed to be afraid. For example, when a dog was about to attack her and the kids in episode 3, she tries to ride it without showing a hint of fear, and when it tries to bite her head off, Yoshiko simply laughs and says its mouth stinks before resuming her attempt to try ride it.
- Genius Ditz: Despite her lack of intelligence, she is shown to be adept at anything that requires speed and stamina. She's able to run for three hours straight without breaking a sweat, manages to out-dance the local men during the Obon Festival, and during idol training under Oshieda-sensei not only does she immediately memorize her dance steps, but near-effortlessly dodges ants at her feet while eating a banana. Then there's her intimate knowledge about bananas, covering such details as variety, texture and cultivation methods. She's also good at drawing manga, although she's not good at writing manga dialogue and storylines to go with her art.
- Genki Girl: Yoshiko's only goals in life are to play and eat bananas, and she does so with gusto.
- Girlish Pigtails: To show her bubbly and childish personality, she ties her hair up in twin-tails.
- Idiot Hero: She's so hare-brained she even fails multiple-choice tests.
- Idiot Houdini: Just from her pure idiocy she shouldn't live longer than 20 seconds, however she always finds a way to at least go through the day unharmed, either through sheer dumb luck, her physical toughness, or even A-kun's conscience barely keeping him from leaving Yoshiko to her fate.
- Ignorance Is Bliss: Dumber than a bag of hammers, happy as can be.
- Insane Troll Logic: Almost everything she says and does is due to her own strange logic (or lack of any logic whatsoever). One particular example is in episode 5; after being in a movie theater, she can't remember how she got home so she believes she learned how to teleport.
- Ironic Name: Yoshiko means "good child." This has a bit of an ironic double meaning: she's not exactly what you call good in terms of her character alone, yet she is good at one thing all too well: being absurdly stupid.
- Kiddie Kid: She's so emotionally immature that even the playground kids tell her that she should go study.
- Kindhearted Simpleton: Yoshiko is so pure and naive she's one of the few people willing to put up with A-kun's antisocial behavior. She was also able to befriend Ryuunosuke despite his first appearance trying to bully her, A-kun and Sayaka because she thinks he was only trying to be friends with them instead of trying to look like a badass (as he intended).
- Large Ham: As befitting her loud, hyperactive, and enthusiastic personality, Yoshiko is always 120% when expressing even the most basic sentiment.
- Made of Iron: Considering all the physical abuse she receives, it's almost a miracle she isn't incapacitated yet.
- Muscles Are Meaningless: Yoshiko has an average build for a girl her age, but she's much stronger than she looks.
- Nice Job Breaking It, Hero: Because she constantly exposed herself in various states of undress throughout childhood from prepubescence, A-kun has little arousal in the presence of nudity and/or fanservice.
- No Indoor Voice: Yoshiko literally screams majority of her lines and depicts every emotion as directly as possible.
- O.O.C. Is Serious Business: When she gets invited by Satou to a conference dedicated to spreading the appeal of locally grown bananas, Yoshiko is far more mature and serious than she's ever been shown in the series. When they ask for her opinion on Japanese grown bananas, she actually says her opinion (that they're not good) quite articulately and backs it up with a reasonable amount of tact as opposed to normally blurting out her feelings. She wants to help the banana farmers that much.
- Phrase Catcher: Almost everybody will say "you are an idiot" to her at one point.
- Savvy Guy, Energetic Girl: The energetic Genki Girl to A-kun's serious Savvy Guy.
- Shameless Fanservice Girl: She frequently and unashamedly strips down to her underwear in her (failed) attempts to entice A-kun, sees little problem squeezing his face against her chest, and didn't need much convincing to wear a Playboy Bunny outfit for one of her mom's hare-brained schemes. And then there's her Carnaval-esque costume for the Obon Festival, which the other dancers didn't want to let her use (but she did anyways).
- Smart Jerk and Nice Moron: The nice moron to A-kun and her mother's Smart Jerk. Granted, everyone's smarter than she is, but specifically with these two the trope is at its most prominent.
- Sobriquet Sex Switch: Yoshiko goes by "Yoshio" when crossdressing.
- The Social Expert: What she sorely lacks in terms of academic intelligence, she more than makes up for with her incredible intuition on social interactions, and romance in particular, albeit if only because Yoshie has been grooming her since childhood to become A-kun's wife.
- The Three Faces of Eve: The energetic, simple-minded Child to Sayaka's Wife and the Iinchou's Seductress.
- Too Dumb to Live: Her stupidity is so infuriatingly astronomical that if she weren't Made of Iron, she'd be a goner long ago. The covers for the first three volumes of the manga compilations even show her following a trail of bananas leading to increasingly dangerous traps.
- Trademark Favorite Food: Bananas. They can be used to motivate her and she can and will go out of her way for especially high-quality bananas. The fact that her favorite food is a simple, sweet fruit emphasizes how immature she is.
- Very Punchable Man: Main character example. Her idiotic and incredibly annoying behavior gets her frequently beaten up by A-kun.
Akuru "A-kun" Akutsu
Voiced by: Tomokazu Sugita (teenager) and Makoto Koichi (child)
Yoshiko's studious, much-belabored neighbor and childhood friend, and her intellectual opposite, being an academic achiever who nevertheless attends the same high school as hers because better schools are too far away.
- Alliterative Name: Akuru Akutsu, hell. If you count his nickname that would make him triple A.
- Anger Born of Worry: Although most of his anger at Yoshiko is due to annoyance with her, a significant part of it is genuine concern for her wellbeing and education. Additionally, while he's initially grateful that Sayaka's actions were able to keep the Iinchou and Yoshiko from bothering him for a time, it quickly turns into him getting angry at all of them for letting their grades suffer as a result and he ends up forcing them to cram at his house.
- The B Grade: He frequently fails to earn perfect scores in tests, much to his dismay.
- Berserk Button: Yoshiko's idiocy is an easy way to make him want to punch someone in the face.
- Celibate Hero: Has no other interests besides studying, something that neither the Iinchou nor Yoshie understand despite his repeated insistence. In his defense, while he is usually surrounded by pretty girls, most of them are incredibly stupid and/or naïve to the point no sane person would willingly hang around them. Later on during the summer vacation, he's forced to sleep over in Sayaka's room and when she understandably gets worried, he gets irritated and tells her he's not interested in that. And in the post-series oneshot, he flat out says he doesn't care whether or not sexual relations occur in his hypothetical marriage with Sayaka, who he only wishes to marry because she's the only one he doesn’t hate and he hopes it'll keep Yoshiko away.
- Charles Atlas Superpower: As a result of his training from his childhood, a single punch at full power can throw Yoshiko several miles away.
- Chick Magnet: Without trying and to his displeasure he's attracted Yoshiko, the Iinchou, Oshieda-sensei and Akane.
- Cool Big Bro: He tries his damnedest to be a good brother to Ruri and help her feel good about herself despite her poor academic record. Subverted because his insensitivity constantly gets in the way and Ruri is not too fond of him as a result.
- The Cynic: His insistence of focusing on the negatives of life and people in general strongly comes from him having to deal with Yoshiko's stupidity, however he is also unpleasant to other people.
- Dirty Kid: He tries to pull this act as a kid in order to put Yoshiko away for good, since she claims she hates perverts. It backfires spectacularly when she states she'll make an exception for him.
- Dope Slap: Will very often hit Yoshiko for saying/doing something stupid (and this happens a lot), luckily she's Made of Iron.
- Enraged by Idiocy: He usually reacts to his friends' stupid antics by blowing off, usually with the exception of Sayaka. He also tries his best not to vent out on Ruri, but sometimes her own idiocy will cause him to slip up and get pissed off.
- Hilariously Abusive Childhood: His life has never been the same since Yoshiko moved into his neighborhood ten years ago. Between stealing his first kiss, stalking him at every opportunity, and brazenly chasing after him, every day has become an ordeal for him even as a five-year-old.
- Ignore the Fanservice: He completely ignores Yoshiko and the Iinchou's various attempts to seduce him.
- Innocently Insensitive: Even at his better moments he's shown to be quite emotionally tone-deaf, such as buying his sister Ruri a book on living without a school diploma as a gift for her eleventh birthday (when all she wanted is to improve her school grades), and making a casual remark about Oshieda-sensei's age in a manner that really got under her skin.
- Insufferable Genius: He's smart, but he's such a boor his Only Friend is the neighborhood idiot.
- Interspecies Friendship: With Yoshiko's pet dog, who is probably one of the few characters he is able to confide in. He even admits that the dog is probably the one good thing that happened to him since he started putting up with Yoshiko's antics ten years ago.
- Jerk with a Heart of Gold: With a strong emphasis on being a Jerkass. On one hand, he's so insensitive, rancorous and aloof, Sayaka thinks only such a Kindhearted Simpleton as Yoshiko would want to be his friend. On the other hand, he tries his best to be a good brother to Ruri and, to an extent, a voice of reason for Yoshiko; he just has a hard time expressing himself properly. Later chapters also have him complement and even buy aspirin for Sayaka when even she was at her limit putting up with Yoshiko's madness.
- Laser-Guided Karma: A lot of the bad things happening to him are often direct results of him being a douchebag to just about everybody.
- Loners Are Freaks: Despite his intelligence, his aloofness and vitriol is a turn-off to anyone except such a Kindhearted Simpleton as Yoshiko, and even Sayaka decided to befriend him out of pity.
- Meta Guy: He constantly points out how much of a moron Yoshiko is, just as the viewer would do.Akun (to Yoshiko): "You are an idiot."
- No Guy Wants to Be Chased: As if Yoshiko's stupidity and the Iinchou's perversions aren't enough to put him away, their eagerness to get under his pants is a further turn-off. A-kun genuinely admires Iinchou's academic intelligence and determination. He also doesn't mind holding casual conversations with her. What turns him off is her perverted nature and lack of self control.
- No Social Skills: In contrast to the academically-deficient but socially-aware Yoshiko, A-kun's devotion to study gives him little time for interaction with his classmates, let alone time to develop any semblance of emotional intelligence.
- The One Guy: He's the only guy of the main quartet.
- Only Sane Man: He occasionally shares this role with Sayaka, as the rest of the cast are usually off their rocker.
- Only Known by Their Nickname: Subverted, since technically Oshieda-sensei refers to him by his proper first-name, "Akuru". Everybody else calls him "A-kun", which gets hilarious when the incredibly polite Sayaka adds an additional honorific and calls him "A-kun-san".
- Perpetual Frowner: He always walks around with his frowned face. Will he ever smile? Surely not as long as Yoshiko is in his life.
- Pet the Dog:
- Despite his many faults, A-kun does genuinely care for Ruri, and wants to be a brother she can look up to in spite of his emotionally tone-deaf responses to her needs (particularly those pertaining to academics).
- Back when they were kids, A-kun was genuinely touched when he heard how Yoshiko watched over him when he was sick for two days, and even felt bad when he made her cry by pretending to be a pervert. However, both of these moments get subverted when he learns that Yoshiko spent those two days kissing him trying to catch his cold, and when Yoshiko said she'd make an exception of letting him see her panties.
- In a strangely literal sense, his gentler, affectionate side comes out whenever he's around Yoshiko's dog, whom he absolutely adores because said dog is smarter and nicer than most of the cast.
- Chapter 117 has him acknowledge the earnestness of Fuuki Iinchou's attempts to improve herself and control her perversions. He also gently and seriously tells Sayaka that she works too hard at helping Fuuki Iinchou, and in general others, and that she should think of her own well-being from time to time. Of course, he immediately scolds her after and subjects her to his harsh studying regimen since he's annoyed that her grades have suffered from her over helpfulness, but even then this is motivated by honest concern for her.
- Politically Incorrect Hero: Refers to the Philippines as "The Large Banana Country" in chapter 122. The context in which he makes the remark (a discussion with Yoshie on where they could set Yoshiko loose in the wild with no repercussions) probably doesn't help either.
- Restraining Bolt: After being bested by Ryuuichi, A-kun states that Yoshiko is this for him. Given that he consistently obtains results in the high 90s while he's being harassed by Yoshiko nearly every second of the day, he's probably right.
- Savvy Guy, Energetic Girl: The serious Savvy Guy to Yoshiko's energetic Genki Girl.
- Ship Tease: With Sayaka, although in typical A-kun fashion he's coldly pragmatic about it. In a oneshot written by the mangaka, a magical talking banana ghost (actually the author himself) forcibly transports the two into a sealed room where they can't get out unless she fulfills his wishes (though the banana just wants the two to have sex). A-kun wishes to marry Sayaka, though it is undercut by the fact that he sees marriage as an out from Yoshiko's romantic advances. Keep in mind that this was his second choice; his initial wish was to make Yoshiko disappear from the world.
- Smart Jerk and Nice Moron: He is the smart guy to Yoshiko's personification of dumbness, although he struggles with The B Grade.
- Throw the Dog a Bone: In Chapter 116, he finally manages to get perfect scores on his exams, an achievement that can be attributed to him having the past few weeks to study peacefully without anyone bothering him due to Sayaka's plan to keep the Iinchou under control and keep Yoshiko distracted.
- Training Montage: Parodied by a five-year-old A-kun training himself to be able to physically rein in Yoshiko.
- Tsundere: A harsh example with regards to Yoshiko. His patience with her antics wears thin most of the time, resulting in him beating her up regularly. However, the fact he tries to put up with her foolishness shows that deep down, he really does care about her and wants to help her.
- Vitriolic Best Buds: With Yoshiko. She's easily been the biggest source of frustration in his life since they were children. And even though he can't stand her idiocy, she's the only person who'll be his friend through thick and thin.
- Would Hit a Girl: Zigzagged. A-kun isn't above giving Yoshiko a Dope Slap or even using suplex moves against her, but would simply dodge the advances of the Iinchou rather than attack her like he does Yoshiko. It's also implied that A-kun does so mostly out of frustration with Yoshiko's antics than anything else. He also tries really hard to avoid upsetting Ruri, albeit she too occasionally gets into his nerves.
Sayaka Sumino
Voiced by: Sayaka Harada
Yoshiko and A-kun's mutual friend, a sweet girl who is too nice to deserve their company.
- A-Cup Angst: She has a complex over her flat chest, and in Chapter 66 (Part 35 / Episode 9E), drunk on the fumes of a glass of beer, she starts crying after Yoshiko mocks her for it in song and admits to padding them.
- Beat Them at Their Own Game: When her second attempt at forcing the Iinchou to see the error of her stalking habits seems to fall flat again, she resorts to taking a page off the latter's playbook to finally make her realize what it feels like to be on the receiving end of her antics.
- Beware the Nice Ones:
- She makes an startling outburst when she Can't Hold Her Liquor during karaoke.
- When she decides to teach the Iinchou a lesson, her Stalker without a Crush gambit proves to be effectively creepy and disturbing. She follows it up with an equally successful "The Reason You Suck" Speech that seems to finally force the Iinchou to rethink her life.
- While trying to help the Iinchou make a better impression on A-kun, Sayaka ends up pulling a lot of weight for the sake of the plan, including outmaneuvering Yoshiko's mom and restraining the Iinchou by exerting the same kind of physical force that A-kun usually employs against Yoshiko.
- Blonde, Brunette, Redhead: The Blonde to Yoshiko's Redhead and the Iinchou’s Brunette.
- Brutal Honesty:
- In Chapter 53 (Part 29 / Episode 8D), she tries to warn the Iinchou that her habit of stalking A-kun is chipping away at her romantic chances with him. This is ultimately subverted when, seeing the Iinchou fall into a Heroic BSoD, she realizes she cannot bring herself to break the latter's heart and comforts her with a false promise that A-kun is definitely falling for her.
- Played straight in Chapter 109 in the same circumstances, with the Iinchou going into denial yet again. This time, Sayaka doesn't back down and eventually succeeds in giving a "The Reason You Suck" Speech.
- Can't Hold Her Liquor: Exaggerated. At the karaoke place at the near end of Chapter 66 (Part 35 / Episode 9E), the waiter gives Sayaka the wrong order and she instead ends up with a beer. And she gets drunk off it… not by taking a sip, but by inhaling the fumes.
- The Cutie: Unlike the idiotic Yoshiko, acerbic A-kun, and the perverted Iinchou, Sayaka is a ray of sunshine among the quartet, so much so Episode 9's opening credits show her being forced by Yoshiko to cosplay as an angel.
- Extreme Doormat: She is so sweet and innocent she frequently gets suckered into Yoshiko and Yoshie's schemes. She also ends up taking back her What the Hell, Hero? callout to the Iinchou when the latter nearly goes over the Despair Event Horizon from Sayaka telling her that her stalker behavior creeps out A-kun. She slowly grows out of this in the later chapters.
- Goofy Print Underwear: Yoshiko and Yoshie discover that she wears kitty-print panties. The latter concludes that this means she's "safe" for interaction with A-kun, because there's no risk that she'd seduce her prospective son-in-law. She does try to avert this later by wanting to buy some "mature" panties, but got caught by Yoshie who forces her to wear the kitty-print panties again.
- Inelegant Blubbering: Played for Laughs at the end of Chapter 66 (Part 35 / Episode 9E), accidentally drunk and complaining over the lack of respect towards her and Yoshiko mocking her flat chest.
- Kamehame Hadoken: In the Tenshi Girl oneshot, the Author Avatar turns her into an angel with the power to use an Angelic Destruction Beam, but warns her that she risks shrinking her chest if she uses it.
- Nice Girl: To a fault. She legitimately wants to be friends with Yoshiko and is generally sweet to every character, even when they walk all over her. The few times she loses her cool, gets treated seriously by the other characters.
- Only Sane Woman: Aside from A-kun, Sayaka is one of the only characters who isn't off her rocker (most of the time).
- Parody Sue: She's so pure and innocent it's a farce, and her only reward for her generosity is to get taken advantage of, and she's only too submissive to do something about her situation.
- Pose of Supplication: She does a dogeza in Episode 3 to ask a farmer for train fare after chasing Yoshiko for over three hours.
- Prone to Tears: She is often quick to tears every time she gets caught up in the gang's shenanigans.
- Rage Against the Author: In the Tenshi Girl oneshot, she gets fed up with the Author Avatar’s attempts to force her and A-kun to have sex and blasts him with her Angelic Destruction Beam.
- "The Reason You Suck" Speech: When the Iinchou gets fed up with her Stalker without a Crush gambit, Sayaka turns it around on her and tells her that she can't do the same things to A-kun and then try to brush it off as a misunderstanding.
- Ship Tease: With A-kun. Endorsed by the author in a doujin no less, though nothing has come of it. She's one of the few people A-kun truly respects, so much so that he considers her a potential marriage partner. Of course, what little atmosphere that was present in the doujin is utterly obliterated when he goes on to explain how a relationship will be his get-Yoshiko-away-from-me-card, and that he doesn't care whether or not sex will be involved. Sayaka is still willing to admit that she likes him, though she despises his heartless and cavalier attitude.
- Stalker without a Crush: She briefly plays stalker to the Iinchou in Chapter 109, in order to give her a taste of her own medicine and show her just how creepy she's been to A-kun.
- Straight Man: She tries, often without success, to act as middleman between Yoshiko's idiocy, A-kun's vitriol, and the Iinchou's perversions.
- The Three Faces of Eve: The sweet, lovely Wife to Yoshiko's Child and the Iinchou's Seductress.
- Took a Level in Badass: She's slowly growing out of her Extreme Doormat status, as shown when she doesn't back down on her Brutal Honesty to the Iinchou a second time and finally breaks through to her.
- Sayaka subsequently takes even more levels in badass over the course of her plan to help the Iinchou, outsmarting Yoshiko's mom when she tries to interfere and doing a lot of physical activity in the process of restraining the Iinchou from her temptations.
- Xanatos Speed Chess: Sayaka's efforts to get the Iinchou to tone down her pervertedness toward A-kun start from an attempt at Brutal Honesty and turns into a Stalker without a Crush gambit, then steadily spirals into a long plan that's constantly on the edge of total failure and forces her to make quick adjustments. She ends up having to work around sudden developments like Yoshiko's antics, Yoshie's interference, and A-kun forcing an impromptu study session at his house, to say nothing of the Iinchou's own temptations.
"Fuuki Iinchou"
Voiced by: Sumire Uesaka
Yoshiko, A-kun, and Sayaka's upperclassman and head of their school's Discipline Committee… with a much filthier mind than she shows in public.
- Abhorrent Admirer: Between her tendencies for stalking and attempts at seduction, it's clear that A-kun would have none of her antics.
- All Girls Want Bad Boys: A-kun's harsh and unfriendly attitude (primarily seen when provoked by Yoshiko) seems to be what she finds most attractive about him, as she mentions his brutality and coldheartedness whenever she talks about what she likes about him.
- Blonde, Brunette, Redhead: The Brunette to Yoshiko's Redhead and Sayaka's Blonde
- Broken Tears: Played for Laughs at the end of Chapter 109, after Sayaka finally forces her to realize why A-kun refuses to pay heed to her overtures.
- Covert Pervert: Attempted, but failed. She mostly uses her position as a cover for her to get involved in Zany Schemes, which just as often as not revolve around lustful, perverted overtures towards A-kun, like seeing him naked or stealing his clothes from his house. Nobody is fooled by her supposed covertness.
- In Chapter 111, she tries to tone down her perverted behavior with Sayaka's help, but Yoshiko's prodding ends up being too much temptation for her to handle and she ends up using Sayaka's advice to mask her perversion instead. Sayaka internally lampshades that she's just going from an obvious pervert to a Covert Pervert.
- D-Cup Distress: She's aware most boys are attracted to her because of her bust. She finds their unwanted attraction annoying. More annoying than that is when Yoshiko draws attention to it and tries to cop a feel.
- Dude Magnet: Boys constantly confess to her. She's constantly rejecting them.
- Generation Xerox: Her mother has the same obsessive nature to throw away everything for the person she loves, even if doing so is insane. It's also clear that it's her side of the family that her giant knockers were inherited from.
- Hidden Buxom: As ridiculous as it may seem, she's actually bustier than she looks and wears bras or swimsuits that conceal a few more inches. Moreover she's still growing each year. If the anime spa fan service is any indication, each is about the size of her head when not suppressed.
- Hypocritical Humor: She refers to her position as an excuse to get closer to A-kun under the pretense of an investigation.
- Impossible Thief: During her argument with Yoshie over her getting too close to Ruri, the latter steals her panties, then accuses her of being a pervert. The Iinchou saves face by stealing Ruri's panties and putting them on herself with no one noticing until after Yoshie flips her skirt.
- Irony: She is supposed to be the paragon of morality in her school, yet she is also a total pervert towards A-kun.
- No Name Given: Her real name is unknown. She is only referred as "Fuuki Iinchou" literally meaning "Discipline Committee Chairperson".
- O.O.C. Is Serious Business: After Sayaka's "The Reason You Suck" Speech in Chapter 109 finally gives her a Heel Realization, she begins taking instructions from Sayaka to avoid creeping out A-kun. After a week of not bothering him, she greets him politely in a normal fashion, much to Yoshiko's shock. Yoshiko immediately sees that she's not acting how she usually does and tempts her with increasingly lewd images of A-kun to bring her back to her old perverted self.
- Only Known by Their Nickname: Played straighter than with A-kun, as she only gets referred to by her position, or by Yoshiko as "Boob President".
- Single-Target Sexuality: She was completely uninterested in befriending male students until she encountered for A-kun. It's also evident she acted with normal behavior throughout childhood until then. Once the two met however, her perverted imagination is unleashed whenever he's involved.
- Stalker with a Crush: Is obsessed with A-kun and repeatedly follows him around (generally for lewd reasons).
- The Three Faces of Eve: The voluptuous, promiscuous Seductress to Yoshiko's Child and Sayaka's Wife.
- Throw the Dog a Bone: After suffering weeks of withdrawal from Sayaka cracking down on her perverted antics towards A-kun, when the Iinchou eventually gives in to temptation and it seems that the plan was All for Nothing, A-kun assures Sayaka that he does appreciate the Iinchou's genuine efforts to improve and is completely understanding that she won't always be able to stay clean, but still tries.
- Tsundere: She makes a bad attempt at the act with A-kun, but it doesn't really matter since he finds both the act and her real personality abhorrent anyways.
- Worthy Opponent:
- Yoshie is impressed when she manages to slip Ruri's panties on in a flash without notice and leaves to fight another day.
- Yoshiko expresses this opinion of her in Chapter 111 in regards to their fighting over A-kun, which is why she's so desperate to get her back to her old self.
Secondary Characters
Yoshie Hanabatake
Voiced by: Yōko Hikasa
Yoshiko's mother, who often concocts plans to hook up her daughter with A-kun.
- Abusive Parents: Invoked for laughs. She frequently hatches plans to get A-kun together with her daughter, all of which involve drugging him so Yoshiko can have her way with him. She's also not above drugging her own daughter if it suits her, such as in chapter 76 when she wants Yoshiko to be asleep so she can bang her husband uninterrupted after he returns from work. Yoshie even punches Yoshiko when the latter interferes with her plans. It's understandable as Yoshiko is such an idiot that her mother has to go to such drastic steps.
- Berserk Button: Nobody calls her an "old hag" and gets away with it.
- Clingy Jealous Girl: A proxy version. She has every intention for A-kun to become her son-in-law. Woe to anyone who threatens that pairing from happening.
- Gold Digger: Her attempts to ship A-kun with Yoshiko is very much driven by her goal of mooching off the former once he gets a well-paying job so she can easily coast off into retirement. She also openly identifies herself as one when warning Yoshiko of potential competition for A-kun.
- Impossible Thief: She can somehow steal people's underwear in a Flash Step despite the fact that the victim is standing.
- Jerkass: Aside from her plans to get A-kun and Yoshiko laid, she becomes downright unpleasant to any girl that hangs around A-kun (considering them a threat to her plans), frequently tormenting the Iinchou for having big breasts and harassing Sayaka by flipping her skirt to make sure she doesn't wear any adult underwear to "tempt" A-kun (though she ultimately relents and deems her "safe" after discovering that she wears kitty-print panties). It's also implied that her first time with Yoshiko's dad may have not even been consensual on his end.
- Motherly Side Plait: Subverted, despite having this hairstyle. She's just as insane as her daughter, and she can be outright abusive towards Yoshiko at times even though it's Played for Laughs.
- Mum Looks Like a Sister: According to A-kun, she's already pushing forty, but can be easily mistaken for her daughter's older sister with her youthful appearance (and personality).
- Shipper with an Agenda: She wants A-kun to marry Yoshiko, if only to be able to mooch off him when he eventually gets a well-paying job.
Ryuuichi Kurosaki
Voiced by: Taku Yashiro
A delinquent befriended by Yoshiko, who he sees as his "boss".
- Butt-Monkey: Yoshiko frequently forgets who he is, and despite his attempts to befriend him, A-kun treats him like crap. To make matters worse, both treat him more as an underling (although he does bring this upon himself due to his shy nature). Even Yoshie finds him repugnant.
- Defeat Means Friendship: Played With, in that he technically starts warming up to Yoshiko after being overwhelmed with her innocence.
- Delinquent Hair: He is bleached-blond, fitting with his thug image.
- The Friend Nobody Likes: He deeply admires Yoshiko and A-kun. The latter refuses to repay the favor, and even the former tends to forget who he is.
- Hidden Depths: He actually manages to achieve the perfect grades that A-kun covets when he decides to emulate A-kun's dedication to studying.
- Japanese Delinquents: He tries to act like one. He's actually too shy to live the life.
- The Team Wannabe: He really tries to cozy himself into Yoshiko's circle of friends, with little success.
Ruri Akutsu
Voiced by: Sayaka Senbongi
A-kun's little sister and a fifth-grader.
- Book Dumb: She's not The Ditz like Yoshiko, but her academic performance is just as poor.
- The Chew Toy: Every time she appears something bad happens to her. Her Running Gag revolves around the fact that not only is she as bad at academics as Yoshiko, she's just as bad at everything else and aware of the fact.
- Determinator: She may be bad at everything but she won't give up easily. After spending an entire day failing at learning to ride a bicycle, Yoshiko thinks that Ruri does have something she is good at, she is good at not giving up.
- Dumb, but Diligent: She may be Book Dumb but has common sense, determination, and works hard to become a better student, unlike Yoshiko.
- Foil: While Yoshiko is mind-numbingly stupid, at least she is shown to be skilled in everything except academics. On the other hand, Ruri, try as she might, is just as much of a failure in many, if not all, aspects of her life, while also having more common sense than Yoshiko.
- Hard Work Hardly Works: Like Yoshiko, she frequently fails exams. Unlike Yoshiko, however, A-kun actually considers her case tragic, especially because she actually tries to study.
- Morality Pet: Ruri is one of the few people A-kun is nice to. Unfortunately, his Innocently Insensitive responses to her needs (emotional, academic, etc.) isn't endearing him to her any time soon.
- Token Mini-Moe: Downplayed — while there are characters younger than her, eleven-year-old Ruri is the most prominent among them, being the younger sister of one of the main quartet.
Mamoru, Tadashi, and Nozomi
Three kids who Yoshiko always plays with.
- Corrupt the Cutie: Played for Laughs with Nozomi, who starts cottoning into Yoshiko's antics, much to the boys' chagrin.
- Two Guys and a Girl: Nozomi is the only girl among the three.
- Wise Beyond Their Years: Downplayed. They're only children, and thus have the appropriate mindset, but even they are aware that Yoshiko is not someone to look up to. Eventually subverted with Nozomi, who began to copy Yoshiko's antics.
Atsuko Oshieda
Voiced by: Rina Sato
Homeroom teacher to Yoshiko, A-kun, Sayaka, and the Gal-girls.
- Hot for Student: Because she's twenty-eight and desperate, she begins to eye A-kun, much to his annoyance.
- Old Maid: She's twenty-eight, and has never had a lover, a fact that she's made painfully aware of whenever she's with Yoshiko.
- Sensei-chan: She's twenty-eight, so desperate for romantic attention she began flirting with her students, and tends to get ignored by Yoshiko and co.
"Dog"
Voiced by: Daisuke Namikawa
A dog that Yoshiko finds at the park, wrestles into submission and ends up adopting.
- Badly Battered Babysitter: After saving a boy from being hit by a car, the boy's mother discovers him in Dog's mouth, and assumes Dog was attacking him. Dog is forced to run away to avoid getting captured by authorities.
- Big Friendly Dog: Big enough for Yoshiko to ride, and a contender with Sayaka for the friendliest character in the series.
- Defeat Means Friendship: Played With. Yoshiko adopts Dog after wrestling him into submission and protecting the three kids from him, but it's likely he thought he was simply playing with them.
- The Determinator: Accompanies A-kun and Yoshiko on their school trip to Okinawa by hanging on to the airplane. How? According to Dog, "I can do it if I try!"
- A Dog Named "Dog": Taken to its most literal conclusion with Yoshiko's acquired pet.
- Heroic Dog: In his own segment in Episode 11, Dog spends his day saving a child from being swept down a river, saving another child from being hit by a car, and saving an entire bank full of people from armed robbers (by single-handedly taking them out).
- Horse of a Different Color: He's so big that Yoshiko can ride him (though she has some trouble staying on at first).
- Hypercompetent Sidekick: While Dog being smarter than Yoshiko is almost a given considering her level of intellect, Akuru finds out in one chapter that he is able to understand English movies and show appropriate emotions towards complex plots.
- Interspecies Friendship: With A-kun, who deeply appreciates his intelligence and empathy for his situation despite being only a pet.
- Love at First Sight: With Sayaka's pet Pomeranian, Pome.
- Undying Loyalty: Was willing to hang onto the outside of an airplane midflight in order to join A-kun and Yoshiko on their school trip to Okinawa.
Akane Eimura
Voiced by: Mao Ichimichi (credited as "M.A.O")
Leader of a trio of "kogals" who alternate between antagonizing and getting caught up with Yoshiko and her antics.
- Ambiguously Bi: She has grown less resilient to Kii's continuous advances and, as of 129, she has admitted that Kii is her "most precious person," and had a tough time deciding on a whim whether or not she'd rather date Kii or her ideal man. The series ends with Akane asking Kii for more time to properly respond to Kii's feelings.
- Blonde, Brunette, Redhead: The Redhead to Kii's Blonde and Kuroko's Brunette.
- Gamer Chick: She's actually an avid video gamer, thus she gets suckered into an all-nighter with Yoshiko, causing her to miss work on their classroom's School Festival booth (despite supposedly being the project leader).
- Gyaru Girl: Downplayed. Of the "Gal-girls", only Akane more or less fashions her school uniform like that of a stereotypical kogal (such as super-short skirts and loose socks). Otherwise, she is just a normal girl.
- The Three Faces of Eve: The energetic, simple-minded Child to Kuroko's Wife and the Kii's Seductress.
- Tsundere: However hard she tries to deny it, she is a lot more interested in Yoshiko and A-kun than she lets on. And in the extra chapters, even amidst her play-dates with Kii she tries to deny enjoying it because they're both girls.
- Vitriolic Best Buds: Of the main trio, she has the most chemistry with Yoshiko and A-kun.
Kii Hiragi
Voiced by: Rena Maeda
A friend of Akane.
- Blonde, Brunette, Redhead: The Blonde to Kuroko's Brunette and Akane's Redhead.
- Really Gets Around: She's gone through 10 different boyfriends, although it's questionable if she's ever even kissed any of them. The breakups were because she was unable to get close to them due to her inability to express herself.
- Satellite Character: She mostly appears alongside Akane. Entire chapters centered around the three kogals can go by without her having a single line of dialogue. Lampshaded in Chapter 114, where Kuroko realizes that Kii's boyfriend troubles are due to her inability to express herself. Amusingly, Kii is actually the focus of that chapter and has more dialogue and personality in that single chapter than she's ever had in the past 113 chapters of the manga combined.
- The Three Faces of Eve: The Seductress to Akane's Child and Kuroko's Wife. She isn't voluptuous, but she's beautiful to the point that guys are constantly asking her out. Her actual active seducing seems to be mostly just towards Akane.
Kuroko Shiina
Voiced by: Yuka Iguchi
The third member of Akane's circle of friends.
- Blonde, Brunette, Redhead: The Brunette to Kii's Blonde and Akane's Redhead.
- Hidden Depths: Of the three kogals, she is the only one with a boyfriend.
- Nice Girl: Like Sayaka she is more or less the moral compass of her group, trying to gently keep Akane on track during the preparation for the School Festival and supporting her dream of getting into a prestigious university (despite her poor academic record). Unlike Sayaka, however, she's not as much of an Extreme Doormat and is definitely less tolerant to Yoshiko and A-kun, though to be fair the former is dragging Akane deeper into idiocy in the first place, and the latter is just all-around unpleasant.
- Really Gets Around: Subverted. Contrary to the promiscuous stereotype of kogals, the trio are pretty pure. In particular, she is in an Anchored Ship due to her shyness.
- Shrinking Violet: For someone in a romantic relationship, she is too shy to truly express that she loves her boyfriend and had to be prodded by Yoshiko.
- The Three Faces of Eve: The sweet, lovely Wife to Akane's Child and the Kii's Seductress. Although her sweetness is mostly towards Akane.
