[[folder:Tomoko Kuroki]]
->'''Voiced by:''' Creator/IzumiKitta (Japanese), Creator/MonicaRial (English)

The main character of the series, who struggles with becoming "popular", making friends and coping with adolescence. Unfortunately, this is not helped by her [[NoSocialSkills social ineptitude]] and [[{{Jerkass}} unpleasant]] [[TheEeyore personality]].

Despite being incredibly anti-social, she craves the companionship and attention of others. She suffers from a raging superiority complex, [[IndulgentFantasySegue vivid delusions of grandeur]], intense self-loathing, and social anxiety so severe that she can barely get out a sentence when talking to someone she is not intimately acquainted with.

The dark circles under her eyes are genetic (and shared by her brother).
* ACupAngst: It's not apparent as most examples of this trope, but it's there.
* ADateWithRosiePalms: One particular infamous chapter/episode has Tomoko buy a [[YaoiGenre BL visual novel]] and then when a personal body massager. Tomoko even notes that if anyone saw her with both, [[DoesThisRemindYouOfAnything they'd get the wrong idea]]. Of course, that's exactly what she had in mind.
* {{Adorkable}}: In spades, when her {{Jerkass}} tendencies aren't in play.
* AllGirlsWantBadBoys: Although she doesn't actually hook up with a "bad boy", she seems to be fond of BastardBoyfriend characters, as evidenced by her enjoyment of a drama CD about {{Yandere}} boys.
* AmbiguouslyBi: Has pretty obvious sexual lust for Yuu, as well as being shown enjoying the memory of a stranger's panties. That said, she's constantly trying to get with boys, including her own brother, and she enjoys {{Otome Game}}s as well as BastardBoyfriend characters. Amusingly, while thinking about what it would be like to be with another girl, Tomoko thinks that her harassment of Yuu is totally normal. It could be argued that Tomoko has been very confused by all those [[HGame H-Games]] she's played. In chapter 51, she sees her lust after Yuu as something natural and normal, and so too her BigBrotherAttraction towards Tomoki, but she doesn't actively think about getting with girls the way she does about getting a boyfriend, or see herself as a lesbian... until it's a chance to be popular.
* AnnoyingYoungerSibling: Acts like one for Tomoki despite actually being older. [[spoiler:According to the volume 5 omake, it was her obnoxiousness that caused their once-loving relationship to turn sour. On the other hand, one WhatIf omake shows that he would end up disliking her even if she were to remain kind to him.]]
* BecauseYouWereNiceToMe: As time goes on and Tomoko finds herself on the receiving end of more PetTheDog moments, she feels the need to repay the people who show her kindness even if she doesn't really know them.
** She makes a batch of chocolates for everyone who gave her some for Valentine's Day, like Mako, Yuri, and Ucchi. And she even gives some to Yoshida, despite their dysfunctional relationship.
** Because Megumi came to her aid a few times in the past, Tomoko congratulates her for graduating high school and even asks the former StudentCouncilPresident if there's anything she can do for her. She feels rather crushed when she realizes she won't be able to give anything back to Megumi.
* BerserkButton: When Yuu makes a joke about Kotomi marrying Tomoki this is one of the few times that we see Tomoko get legitimately angry at Yuu, making no attempts at hiding her anger at all.
* BigSisterBully: Tomoko tries to pass herself off as a CoolBigSis to Tomoki, and was infact one at a time, but in actuality is extremely negative and manipulative whenever she's around him. It's also implied that this is the reason why Tomoki stopped being friendly with her to begin with.
* ButForMeItWasTuesday: She has made a huge impact on Ucchi's life, to the point where the girl is utterly obsessed with her. However, Tomoko never intended to do such, their first real interaction was on the last night of their field trip, and Tomoko was just being her [[NoSocialSkills normal]] [[CovertPervert self]]. Later "interactions" were mostly Tomoko doing something else and it just so happened Ucchi was the target or a witness.
* ButtMonkey: Any of her attempts to become popular ''always'' come out wrong for her.
* CaughtWithYourPantsDown: Tomoko has been walked in on playing her Hentai games, ''[[RunningGag multiple times]]''.
* CharacterDevelopment: Slowly but surely, Tomoko matures a good deal over the course of the manga, particularly in her second year. She dials back on her ill-thought schemes to become popular to the point where she eventually gives up on them entirely, doesn't stutter nearly as often as before, is more comfortable in public places like cafés, lets go of a lot of the resentment she felt towards her peers, shows occasional bouts of consideration for others, and is more studious and responsible in general. By the end of the year, she even manages to get herself a small circle of friends and acquaintances to regularly socialize with.
* ChronicVillainy: She's never managed to break her bad habit of doing {{Jerkass}} things.
* ClingyJealousGirl: When it comes to Yuu or her brother, the latter of which she declared if he ever brought home a girl, she would take responsibility and ''[[{{Yandere}} kill her]]''.
* ConvenientlySeated: At first, she seats in the back row seat by the window. When the second semester and Tomoko loses her seat, she lampshades it by commenting about how lucky she was getting "the seat main characters always get in anime and light-novels" in the first period, lamenting that she now has to dwell in an awkward spot, surrounded by people.
* CosmicPlaything: She doesn't realize it, which might be a good thing as the truth might plunge her into the pit of despair or worse, since she can't realize why her attempts to make friends are massive failures.
* CovertPervert: Played with; since the viewers are always privy to her thoughts, it's easy for us to see that she's ''very'' perverted, but most other characters (aside from Tomoki) are unaware of how perverted she really is.
* CreepyShadowedUndereyes: Seems to be a family trait; however, Tomoko's habit of staying up late at night probably doesn't help, as she notes [[{{Meganekko}} before trying on glasses to hide them]].
* DesperatelyCravesAffection: To the point of making BrotherSisterIncest overtures, with Tomoki none too pleased. Also part of why she's so attached to her only real friend, Yuu.
* {{Determinator}}: Despite the universe doing [[CosmicPlaything everything it can]] to make her give up.
* DontYouDarePityMe: As shown in chapters 33 and 42, she doesn't like it when others take pity on her, as she feels patronized by this.
* DullEyesOfUnhappiness: In addition to being very large and roughly-sketched, her eyes lack a notable sheen that's present in most other characters, illustrating her perpetually dour mood.
* EeriePaleSkinnedBrunette: The bags under her eyes only serve to further emphasize this aspect of hers.
* TheEeyore: She falls into bouts of self-loathing and has a lot of negative thoughts in social situations. Even when she acknowledges that her life got better than how it used to be, such as in chapter 115, she doesn't expect good times to last.
* ExpressiveHair: Sometimes, you can tell how exasperated she is just by seeing how much her hair is flaring out.
* {{Expy}}[=/=]DistaffCounterpart: Downplayed ''very hard''. An {{otaku}} LoserProtagonist who's a master of {{Dating Sim}}s and [[NoSocialSkills near-zero communication skills]]? Sounds a lot like a PlayedForDrama version of [[Manga/LuckyStar Konata Izumi]], and a lot like a gender-flipped fusion of [[Manga/TheWorldGodOnlyKnows Keima Katsuragi]] and [[Anime/WelcomeToTheNHK Tatsuhiro Satou]]. But unlike Keima, who's a loner by choice and is perfectly capable of dating real girls in much the same way as fictional ones (given enough encouragement, or coercion for that matter), or Satou, who eventually outgrew his {{Hikikomori}} ways, Tomoko [[CringeComedy repeatedly fails at socializing in real life]].
* FailureHero[=/=]FailureIsTheOnlyOption: [[TropesAreNotBad Done rather well.]] She can't do ''anything'' right. Every time she has a goal, it's bound to fail or backfire horribly.
** The few ThrowTheDogABone moments she gets are usually down to luck and the kindness of others, or when she's not actually trying so hard to become popular.
* FemaleMisogynist: [[GreenEyedMonster Her jealousy]] leads to a general resentment of other girls aside from Yuu, often viewing girls who are more socially adept than her as "bitches" or "sluts". [[spoiler: However, this doesn't appear to apply to Yuri, probably because she recognizes that Yuri is almost as socially inept as she is]].
* FoolishSiblingResponsibleSibling: The Foolish to Tomoki's Responsible.
* FriendToAllChildren: She's fond of kids and enjoys their company. This is PlayedForDrama, since it serves as a reminder that she doesn't have any friends of her own age.
* GamerChick: Effortlessly plays a Pop'N Music knockoff with only a blank stare on her face, not to mention her constant playing of otome games.
* {{Gonk}}: Often, when emotional.
** There was also the time where she tried to change her appearance, which worked out well until she decided to mess with her face.
* GreenEyedMonster: She enjoys the misfortune of others and frequently wishes for horrible things to happen to people that she perceives as having happy, carefree lives. She also ''does'' have big green eyes, and calls girls more socially successful than herself, including her best friend Yuu, "bitches", "sluts", etc.
--> '''Tomoko:''' ''"If you're not a worthless god, I'd like to see you try and make me happy... If you can't manage that, at least make everyone as unhappy as me. If you can't, it's fine I guess... But I'll despise you forever..."''
** Also why she couldn't get along with Kotomi in middle-school despite being much alike, as she wanted to keep Yuu to herself.
** As of chapter 97 she seems to have realized that her former classmates who are more sociable than her don't act sociable to spite her, [[CharacterDevelopment and she doesn't hate them for this anymore]].
* HeyYou: In general, she is very bad at remembering names, or just doesn't care to learn them in the first place, leading her to often refer to the people around her by (often derisive) descriptors in her mind. In Chapter 124, Tomoko even notes that she's never once actually called Yuri by name, even though Yuri's ostensibly the best friend she has in her high school. [[spoiler:This comes to a head in 126, when she tries to get Yuri's attention by just repeatedly calling out "Hey," resulting in a frustrated Yuri telling her that her name is not "Hey."]]
* HollywoodNerd: ''Mostly'' averted. She's an introverted shut-in, with the disheveled appearance and complete lack of social skills to highlight it. In a departure from the archetype, she's also not particularly accomplished academically.
* HormoneAddledTeenager: Tomoko implicitly UsedToBeASweetKid, but as she entered adolescence, she became a more self-centered {{Jerkass}} who only ever thought about sex.
* {{Hypocrite}}: She angrily denounces anyone more popular than her as shallow, vapid and selfish, and refers to any girls more sociable than her as "sluts". She's the real shallow and selfish one, who seeks popularity above all else, and proclaims: "Without doing anything, I can get into the pants of the boys for three years!" in the very first chapter. At the same time, she looks down on anyone ''as'' unpopular as she is as being losers, freaks and weirdos who are somehow beneath her despite them generally having the same interests that she does.
** HypocriticalHumor: is a RunningGag in this series.
* IJustWantToHaveFriends: ...and get laid, apparently.
** As the series progresses, there's a subtle development in that Tomoko's goal moves down from "getting popular" to just "making a friend", and at the very least "talking to people".
* IneffectualDeathThreat: Frequently wishes death and worse on her classmates for the smallest of offences, like someone apparently taking her umbrella.
* InferioritySuperiorityComplex: While she's rather self-centered and looks down on a lot of people for petty reasons, it's still clear that her self-esteem is actually very, very low.
* InnerMonologue: Keeps her thoughts to herself more often than actually speaking.
* InnocentlyInsensitive: Towards Yuri. Yuri is bothered by how aloof Tomoko seems to act towards her despite spending most of their time at school together, but Tomoko has no idea there's even a problem in the first place. She's also oblivious to the effect she's had on Ucchi, disturbing the girl with her mere presence at first, and going on to making her jealous at the drop of a hat.
* InSeriesNickname: "Mokocchi." Only Yuu gets to call her that, though. [[spoiler:In chapter 126 Hina Nemoto comes up with another nickname for her, "Kuro".]]
* IronicName: Depending on what kanji you spell it with, the name "Tomoko" can mean "beautiful girl" or "wise child", among others. Needless to say, she's neither of these things.
* ItsAllAboutMe: She's a very self-centered person who doesn't have any particular empathy for anyone around her. Thankfully, Tomoko's been [[CharacterDevelopment growing out of it]], acknowledging that even more social people have problems of their own, and is willing to show genuine consideration for others every now and then.
* {{Jerkass}}: Downplayed. In the main series, she can come off as a condescending jackass who can occasionally show humility and self-esteem, although she most often keeps her negativity to herself. However, Tomoki and Komiyama tend to see and feel the more unpleasant side of Tomoko.
* JerkassHasAPoint: As maladjusted, unpleasant, and warped as she is, Tomoko does raise valid points every now and then.
** When Akari's friend, Sayaka, confronts her over the former's feelings for Tomoki and her eagerness to see his genitals, Tomoko is correct when she points out it's perverse and inappropriate to say such things in front of his older sister.
** She accuses Akari and Kotomi of being perverts. While her poor treatment of them is usually uncalled for, she's not wrong, and the latter in particular takes her attraction towards Tomoki to very creepy levels.
** While it evolves into a nonsensical rant about how all baseball players are smokers and delinquents, Tomoko is correct when she notes that the baseball club gets preferential treatment in how it forces the whole student body to come cheer for its games when other clubs work just as hard for less recognition.
* JerkassRealization: In Chapter 97, she admits that she was a horribly judgmental person in her first year of high school, and lets go of a lot of the resentment she feels toward her more social peers.
* KickTheDog: Her treatment of her brother when he fell ill was pretty appalling. She tried to lower his temperature and poured hot porridge on his face out of spite, and otherwise annoyed him at every opportunity. [[LaserGuidedKarma This went on to bite Tomoko in the ass]] when she caught his disease at the beginning of a three-day weekend.
* LazyBum: When left to her own devices, Tomoko would rather just laze around her room, playing video games, watching anime, and surfing the web. When called out on her unwillingness to help around the house by her mother as opposed to her younger but more responsible brother, Tomoko's first instinct is to [[NeverMyFault blame Tomoki for making her look bad]].
* LittleBigSister: She's considerably shorter than her younger brother. Not very unusual given he's only a year younger, but it still highlights her immaturity.
* LonelyDollGirl: On occasion, Tomoko will use her plushies to act out her fantasies of a better social life, from envisioning what her time in a school club could be like, to...imagining how sex with Yuu would go.
* LonersAreFreaks: Her mindset, which she desperately wants to avoid.
* LoserProtagonist: Though, she tries hard to not be this.
* MagneticHero: As the series has continued, she has consistently shown to be able to attract the interest and attention of pretty much anyone who spends even a small amount of time with her. Even characters who initially display complete indifference to her become obsessed with learning more about her after witnessing her bizarre behavior firsthand.
* ManicPixieDreamGirl: She acts as a [[DownplayedTrope downplayed]] version for Yuri. While their relationship is purely platonic and Tomoko is by far the more asocial of the two, she tends to encourage Yuri to try things she wouldn't do otherwise, like make Valentine's Day chocolate for her friends. She's even caused [[NotSoStoic the normally stoic girl to laugh]], which Mako has noted she's never seen Yuri do before.
* ManipulativeBastard: She tries. Dear lord, she tries.
* MeaningfulName: "Kuroki" can literally mean "black mood". It sums up her character pretty well.
* MessyHair: Her long hair is rarely combed.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Tomohiro_Kuroki Tomohiro Kuroki]].
* NerdsAreVirgins: Several storylines are about Tomoko's lack of experience and sexual frustration.
* NeverMyFault: Zigzagged. She often derides herself and finds faults with her social skills and appearance, but never dwells on it and immediately finds something else to blame for her social failings.
* NiceHat: As part of her casual wear, she'll frequently wear a newsboy hat.
* NoSocialSkills: Pretty much the entire conflict of the plot is based around the fact that Tomoko's skills leave a lot to be desired. As she begins to socialize more, her complete lack of social awareness causes her to regularly put her foot in her mouth and unintentionally piss off others.
* NotSoDifferent: From her brother, Tomoki, especially in later chapters. The initial assumptions both have after meeting the same person for the first time are often identical. Even more recently, Tomoko like her brother barely acknowledges that people have crushes on them, though Tomoko's case is more downplayed than her brother's: [[spoiler:while two girls have admitted to Tomoki's face they want to see his dick, Ucchi has been less direct in her crush on Tomoko, simply trying to find some excuse to be near Tomoko during some activity while she herself is thinking more about the activity itself, or the strange behavior of the other girls she knows]].
* ObliviousToLove: Tomoko is completely unaware of Ucchi's growing fixation with her and is confused whenever Ucchi does something nice for her. More understandable than many examples, as after the school trip the two rarely interact directly, so Tomoko has few opportunities to notice Ucchi's overtures.
* OlderThanTheyLook: She's 15 when the manga and anime begin, but she's so short, thin, and physically undeveloped that you'd be forgiven if you thought she was 10.
* {{Otaku}}: Of Otome games. So much that she attempts to socialize in real life with tactics from the games. See the {{Expy}}[=/=]DistaffCounterpart entry for details.
* OtakuSurrogate: Downplayed; while she does have interests in anime and video games that male otaku in real life would have, she's also into things that are aimed specifically at girls, such as otome games. Unfortunately, her interests in all the perverted media aimed at otaku only make her more unapproachable and unable to function in social situations.
* PeekABangs: Although both of her eyes can occasionally be seen, this trope is largely in play for her through much of the series.
* PersonAsVerb: In Chapter 39, she tries to stand out more in her class by performing a wacky introduction during the first day of second year. For her efforts, among her classmates, her name becomes a synonym for [[EpicFail doing something exceptionally poorly.]] Fortunately, it seems to have gone out of fashion by Chapter 42.
* PlayboyBunny: Dresses as one in a fantasy sequence that's a ShoutOut to ''LightNovel/HaruhiSuzumiya''. She somehow manages to make it look ugly and unappealing.
* TheQuietOne: She once went a month and a half without talking to anyone outside her family -- her streak was broken when she managed to tell her teacher "goodbye". In contrast, she tends to be ''very'' chatty in her [[InnerMonologue Inner Monologues]].
* SanityBall: Tomoko gets to enjoy being the [[OnlySaneMan Only Sane Girl]] whenever she interacts with Akari. The girl's crush on Tomoki, her easily flustered demeanor, and her terrible habit of misreading the situation all combine to turn her into a sobbing, stammering mess. And this goes double whenever Kotomi gets involved, whose infatuation for Tomoki leads her to commit all sorts of craziness as well that leaves her in the same position. Either way, Tomoko is left equally bemused and annoyed by their antics.
* SelfServingMemory: Whenever Tomoko tries to guilt Tomoki into hanging out with her, she frequently brings up how [[BigBrotherWorship he used to look up to her when they were kids]]. She conviently ignores the fact that the reason why Tomoki is currently so distant from her is because she started ''[[BigBrotherBully bullying him]]''.
* ShesAllGrownUp: [[http://www.mangago.me/read-manga/watashi_ga_motenai_no_wa_dou_kangaete_mo_omaera_ga_warui_anthology/bt/207725/Ch6/4/ A page in the anthology]] [[ThrowTheDogABone reveals that she could grow up to be quite pretty.]]
* ShrinkingViolet: Combined with NoSocialSkills, this is the reason she can barely put together a full sentence with anyone she doesn't know.
* SiblingYinYang: With Tomoki.
* SitcomArchNemesis: With Komiyama, whom Tomoko dislikes because she feels that she has to compete with her over Yuu's attention, [[spoiler:as well as because Komiyama is romantically and sexually interested in Tomoki, causing Tomoko to be disgusted with her, and, as of chapter 47 of the main story, also because Komiyama admitted that she didn't like Tomoko back in middle school.]]
* StrongFamilyResemblance: As we see in Chapter 121, she gets her particular brand of CreepyShadowedUndereyes from her father.
* ThrowTheDogABone: Overall Tomoko's second year in high school became a lot better and she was actually able to make sort of friends with people.
* TomatoInTheMirror: Chapter 1: After 5 months trying to convince herself that she's popular, Tomoko literally sees herself at the mirror and admits the horrible truth:
--> ''Now that I look in the mirror after a few years, I see that I turned into some creepy entity!''
* {{Troll}}: She enjoys pranking, insulting, or otherwise getting under the skin of people she knows purely [[ForTheLulz for lulz]]. Tomoki and Kotomi are her favorite targets.
* TheUnsmile: Pretty much every attempt she makes at smiling ends up coming off as looking more like a SlasherSmile. Combined with her CreepyShadowedUndereyes, the effect is... rather unsettling.
* UnsympatheticComedyProtagonist: Her portrayal switches between this, CosmicPlaything and some combination of both depending on the chapter. She can be very pitiable, but at the same time rather self-centered, condescending (especially to her classmates, though this is restricted to her {{Inner Monologue}}s and never expressed outwardly) and, in Chapter 33, is shown to be a devotee of [[ComedicSociopathy schadenfreude]]. In the spinoff, she's portrayed much more unsympathetically than in the main story.
* WeirdnessMagnet: Tomoko seems to have developed a knack for attracting a lot of oddballs to her, or at least in making people develop their own idiosyncrasies. Yoshida is a [[HairTriggerTemper short-tempered]] but [[AmbiguousInnocence oddly innocent]] teen who's often mistaken for a delinquent, Ucchi has grown progressively more obsessive over Tomoko to the point of stalking her, Kii-chan has gone from a normal girl to a borderline CreepyChild, and both Kotomi and Akari have become incredibly perverse ([[ButtMonkey and unlucky]]) in pursuing their mutual crush on Tomoki. Lampshaded in Chapter 116, where Tomoki notes that all of his sister's friends appear to be a bunch of weirdos.
* WhyDidItHaveToBeSnakes: Nothing frays Tomoko's nerves more than attractive boys. Even after her social skills improve enough that she can communicate with strangers without tripping over her words too much, she still turns into a nervous, stuttering puddle of goo in the presence of hot guys.
* WideEyesAndShrunkenIrises: She has this expression a lot.
* WrongGenreSavvy: One of the major factors behind her inability to adapt to society is the fact that she tends to "learn" social skills through anime and video games, and mistakes many character interactions therein (including those that are, from an objective viewpoint, downright outlandish) for actual practice, and tries to emulate them in real life, which more often than not only serves to further humiliate her.
* YouAreWhatYouHate: The reason she despises Kotomi. Both are antisocial and their OnlyFriend is Yuu. Each one of them believes the other is below her.

[[folder:Tomoki Kuroki]]
->'''Voiced by:''' Creator/YuuichiNakamura (Japanese), Creator/DavidMatranga (English)

Tomoko's younger and more responsible brother. He is a fairly average and well-adjusted person for his age, and treats his sister with the usual level of sibling-related intolerance. Despite this, he ''does'' care for his sister and tries to support her when she needs it.
* TheAce: In comparison to Tomoko, at least. He's mature, reliable, athletic, has a large social circle, and multiple girls that are interested in him. During the sports festival, it's revealed that even the [[{{Bishonen}} attractive]] and [[BigManOnCampus popular]] third year students on the soccer team respect Tomoki, despite him only being a first year.
* AnnoyingYoungerSibling: Played with. He does tend to get on Tomoko's nerves, though not so much due to obnoxiousness as due to the fact that he's guilty of such "crimes" as staying home sick while Tomoko has to go to school, having friends who care enough to visit him while he's sick, or cleaning his own room and making his lunch himself (much to their mother's praise - and unlike his sister, and thus making her look bad in comparison). Also inverted, as Tomoki definitely sees Tomoko as his annoying ''older'' sibling.
* BerserkButton: While he always braces himself whenever his sister approaches him, he gets particularly angry at her when she barges into his room unannounced, which is frequently.
* BigLittleBrother: He's considerably taller and older-looking than his older sister. While it's not particularly strange, as they're only one year apart and both teenagers, it emphasizes how down-to-earth and mature he is in comparison to her.
* ChasteHero: While his sister is a raging pervert, Tomoki is completely unfazed by two girls telling him that they want to see his dick, [[CluelessChickMagnet to the point of failing to pick up that either is interested in him at all]].
* CluelessChickMagnet: In addition to Tomoko making BrotherSisterIncest overtures, both Kotomi and Akari pine for him. He barely even remembers they exist, remains oblivious to their feelings even after they both blurt out in his presence that they would like to see his dick, and shows no interest in romance in general. In later chapters he seems to catch on to Kotomi's crush on him (mostly as a result of Kotomi repeatedly embarrassing herself in his presence because of said crush), but at this point he is too weirded out by her to reciprocate.
* CovertPervert: Subverted. Tomoko constantly accuses him of being [[CaughtWithYourPantsDown Caught With His Pants Down]] whenever she enters his room, but he's always shown to simply be listening to music, reading a book or sleeping. Likewise, whenever Tomoko accuses him of [[BrotherSisterIncest being attracted to her]], he expresses disgust and confusion about why she would even suggest it. Later, when forced to sit down and have lunch with Kotomi and Akari by Tomoko, it's made pretty clear that he simply isn't particularly interested in having a girlfriend.
* CreepyShadowedUndereyes: Like his mother and sister, although their mother's are less pronounced.
* DeadpanSnarker: In response to Tomoko's antics.
* {{Expy}}: Of sorts to [[LightNovel/{{Oreimo}} Kyousuke Kousaka]].
* FacePalmOfDoom: When ticked off, he simply grips his sister's head really hard.
* FatherIWantToMarryMyBrother: In a home video their mom found in episode 7, he said as a little kid he wanted to marry Tomoko. He was notably disturbed when he saw this video (also because of how much more affectionate he was towards her).
* FoolishSiblingResponsibleSibling: The Responsible to Tomoko's Foolish.
* GetOut: Practically his {{Catchphrase}}, as he says it whenever his sister enters his room without permission.
* HiddenDepths: Generally comes off as a grouchy loner, though this is almost entirely because we almost only ever get to see him when he's forced to put up with Tomoko's obnoxious antics. On the occasions where we get to see his life outside of his sister, he is shown to be a surprisingly popular guy with a large friend group, multiple female admirers and an active spot on his school's soccer team.
* [[IHaveNoSon I Have No Sister]]: Exclusively refers to Tomoko as "that girl", even in his own thoughts. This is in stark contrast to when he was young, where he affectionately called her "nee-chan".
* JerkWithAHeartOfGold: Tends to physically rein in his sister if needed. That said, deep down he is a generally good-natured guy who is shown to be perfectly nice and friendly when dealing with people who aren't Tomoko.
* NotSoDifferent: Both he and Tomoko are quick to assume that Masaki is a delinquent, and share the belief that delinquents like cute things. [[spoiler:On the other hand, the trope is subverted in Chapter 41. Tomoko visits Tomoki in his classroom and sees him sitting alone and by himself; this gives her the impression that he is a loner just like her. However, when she visits him later she finds out that he is actually very popular in class and has not only friends but also admirers. Tomoko doesn't take the revelation well.]]
* TheOneGuy: Currently the only major male character. Justified due to Tomoko having problems working up the courage to talk to other girls, let alone guys. This is briefly lampshaded when, after realizing that she has begun interacting with other girls more frequently, Tomoko vows to try to talk to a guy, only to awkwardly barge into Tomoki's room, wave at him and then leave.
* OnlySaneMan: The only major character who is able to completely shut down Tomoko's antics before they escalate even further. It helps that [[WouldHitAGirl he's willing to get violent with her]].
* OrdinaryHighSchoolStudent: All evidence points to him having a perfectly normal and fulfilling school life, in contrast to his sister.
* PerpetualFrowner: He's always wearing a grumpy expression of some sort, at least when around his sister.
* PetTheDog: Sometimes he takes pity on Tomoko. Notably, he expresses relief during her second year graduation that she had managed to make some friends by the end of the year. Of course, he also makes a point of noting [[WeirdnessMagnet how all of her new friends seem to be a bunch of weirdos]].
* ThePowerOfHate: Thinking about various occasions when Tomoko has pissed him off causes him to tap into an UnstoppableRage that has allowed him to become the star player of his soccer team. In comparison, thinking about the few occasions when the two of them have actually gotten along causes him to be thrown off his game and miss scoring the winning goal.
* TheQuietOne: Even when talking to people that he doesn't hate (as in, anyone other than Tomoko), he still rarely says more than a few words at a time.
* TheReliableOne: Viewed as this by his parents. While Tomoko's laziness and rude personality results in her frequently screwing up, their parents can always count on Tomoki to meet, or even occasionally exceed, their expectations.
* ScrewThisImOuttaHere: One of his most frequent responses to his sister's wacky antics is staring at her for a few moments and then promptly walking away without even so much as asking what she's doing.
* SiblingYinYang: With Tomoko.
* TheStoic: His only emotion is seemingly a perpetually-annoyed calm. Even when he isn't particularly agitated, his expressions remain dour and his speech remains curt.
* StraightMan: Serves as this whenever he shares a scene with his sister.
* StrongFamilyResemblance: Invoked in chapter 106. Ucchi claims that his eyes and mouth are very similar to Tomoko's, which is how she is instantly able to tell that the two are siblings. While her conclusion is correct, it's not clear how strong the resemblance actually is, as no other character has commented on it.
* TranquilFury: While he's frequently pissed off at his sister, he only explodes at her when she's being particularly obnoxious. Otherwise he remains fairly stoic when dealing with her.
* UnkemptBeauty: Despite sharing his sister's CreepyShadowedUndereyes while also being a PerpetualFrowner, giving him a fairly disheveled and unfriendly appearance at all times, he is seen as attractive by girls. This may be because AllGirlsWantBadBoys.
* WouldHitAGirl: He's not above lashing out when Tomoko's getting on his nerves (giving her a kick, grabbing her face, etc.). He invoked [[WouldntHitAGirl the other trope]] one time Tomoko was annoying him. Then when her antics went too far, he had no choice but to strike her into calming down.

[[folder:Yuu Naruse]]
->Voiced by: Creator/KanaHanazawa (Japanese), Creator/EmilyNeves (English)

Tomoko's best friend from middle school, who managed the transition to adolescence far more gracefully than Tomoko. She was originally very quiet and nerdy; however, after moving to high school she dyed her hair, improved her fashion sense and personal appearance, became more outgoing and eventually got a steady boyfriend. Despite changing so much, she remains a kind friend to Tomoko, though she remains blissfully oblivious to how different their social lives are and is unaware of the more unpleasant aspects of Tomoko's personality.

She is the protagonist of the spin-off manga ''It's Your Fault My Friend's Not Popular'', which details her middle-school life with Tomoko from her perspective.
* AttentionDeficitOohShiny: In the final episode of the anime, she starts to chase after a distraught Tomoko out of concern for her but ends up being distracted by a cat.
* BeautifulAllAlong: An interesting case where she's introduced after having this already happen to her. Back in middle school she wore thick glasses and unflattering clothing, but was still beatiful underneath them.
* BewareTheNiceOnes: [[spoiler: After embarassingly winning a bet in the Christmas special of 2016 Yuu makes Tomoko and Komiyama sing Christmas carols together for an hour.]]
* BrainlessBeauty: Despite her beauty and kindness, she's oblivious to Tomoko's unsavory nature and has below average grades. In the second Christmas special Tomoko opines that even using Twitter or keeping a blog would be too complicated for Yuu to handle. She also remains oblivious to the animosity between Tomoko and Kotomi [[spoiler:until chapter 54 of the main story. In chapter 124 she also does not pick on Yuri's jealousy of her friendship with Tomoko, and is just happy that Tomoko's new friends like her so much]].
* ClosetGeek: She's currently this, due to her popularity having soared at her high school after she cleaned up her appearance. At one point she says that she's happy that she can still hang out with Tomoko since she doesn't have anyone else to talk to about anime-related things.
* CoolPet: In chapter 64, while catching bugs with Tomoko and Kotomi, she manages to catch a [[https://en.wikipedia.org/wiki/Dynastinae rhinoceros beetle]]. Tomoko and Kotomi comment on its coolness and rarity, and Tomoko convinces Yuu to keep it as a pet.
* CluelessChickMagnet: She's completely unaware of the effect she had on Tomoko and Kotomi in middle school, and even in high school, she still hasn't caught on to Tomoko's blatantly obvious attraction to her.
* CovertPervert: One thing she ''isn't'' oblivious about is innuendo.
* DecoyProtagonist: In the spin-off she is set up as the protagonist at first, but the narrative focus eventually moves from her to Tomoko and Komiyama, and the story is mostly about the two's "[[SitcomArchNemesis friendship]]."
* DudeMagnet: She draws guys to her without even trying, much to Tomoko's eternal chagrin.
* DumbBlonde: Her hair is dyed, but otherwise applies.
* EroticDream: [[spoiler: Implied in chapter 7 of the spin-off. Tomoko and Kotomi are pretty delighted by it.]]
* EvenTheGirlsWantHer: Tomoko and Kotomi both have pretty obvious crushes on her in middle school and separate high schools have done little to ebb their lust.
* {{Foil}}: To Tomoko, also to Kotomi. She had been, initially, shy like her two friends but was able to overcome it and build a social life, unlike Tomoko. In middle school she already had a hidden natural beauty that drew attention. Most importantly, she has shown negative feelings towards other people the least, unlike her friends.
* FriendToBugs: Played with. She doesn't particularly deal well with insects, but when she goes bug-catching with her friends, she insists on letting the critters go when Tomoko wanted to watch them eat each other. She also keeps a rhinoceros beetle she catches as a pet.
* TheGlassesGottaGo: After taking her glasses off, her popularity soared.
* GreenEyedMonster: [[spoiler:Surprisingly, in chapter 57! She deals with it in a completely different way than Tomoko, though.]]
* TheHeart: She is pretty much the only reason Tomoko and Kotomi even talk to each other, and also the only reason they are willing to be civil when they do talk. [[spoiler: In chapter 54 she takes an active role to the trope.]]
* ImportantHaircut: In Chapter 100, Yuu cuts her hair to shoulder length, due in part to [[spoiler: breaking up with her boyfriend.]]
* InformedAttractiveness: Everyone who sees Yuu always makes a note on how cute and attractive she is. While the manga has plenty of attractive and fashionable girls, she stands out as the only one who is consistently given this treatment.
* InnocentlyInsensitive: Her casual remarks indicating that she has a much more fulfilling social life than Tomoko can hope for, including having a boyfriend, cause Tomoko a lot of distress.
** Komiyama was also hit with this, in chapter 6 of the spin-off.
** During Tomoko's, Yuu's and Kotomi's Christmas party in the 2016 Christmas special Tomoko comes up with the idea for the trio to buy one another funny gifts that would be completely useless to the recipient rather than ordinary Christmas gifts. In response Yuu [[spoiler:buys Tomoko a pack of condoms. Yuu claims to have thought about it simply as a funny gift, and is embarrassed when Tomoko points out what such a gift implies about [[NerdsAreVirgins what Yuu thinks of Tomoko]].]]
** In chapter 124 Yuu says that she would love to meet Kotomi's friends, and claims that they have to be kind if they are friends with her; Kotomi notes in her InnerMonologue that the way Yuu phrased that is a bit hurtful for her.
* {{Meganekko}}: Wore glasses in middle school. Still wears them at home.
* MoralityPet: She was the only person for whom Tomoko displayed any kind of empathy for in the early parts of the manga.
* MsFanservice: Or at least this is how Tomoko sees her.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Yoshihisa_Naruse Yoshihisa Naruse]].
* NiceGirl: Overall, a pretty nice and sweet (if somewhat airheaded) person.
* ObliviousToLove: Doesn't notice Tomoko's crush on her.
* OnlyFriend: To Tomoko (who even admits this in one of her {{Inner Monologue}}s in chapter 29) in the early chapters, and also to Kotomi in the prequel. Not so much in later chapters, as Tomoko makes a few more friends, while Kotomi befriends a girl named Itou and has a somewhat OddFriendship with her romantic rival Akari. Even then, Yuu seems to remain the closest friend to Tomoko and Kotomi.
* OpaqueNerdGlasses: In anime flashbacks, though her eyes are visible in both manga.
* {{Otaku}}: She was this during middle school. Now that she's in high school and has a better social life, she's more of a ClosetOtaku around everyone except Tomoko and Kotomi, whom she feels she can be more open about otaku-related things with.
* OutOfFocus: Yuu has fewer appearances in the story since Tomoko managed to get some semblance of a social life at her school.
* RapunzelHair: In middle school.
* StupidGood: Her niceness can be very high when it comes to her friends. For example, when they were in the pool:
--> '''Tomoko:''' ''"If I peed in here, would you pull away from me?"''\\
'''Yuu:''' ''"I wouldn't. Because we're friends."''
* ThousandYardStare: Whenever she gets upset, she has this vacant look on her face complete with an empty smile that displays no happiness whatsoever. Tomoko thinks she looks like a rape victim this way.
* ZettaiRyouiki: Type A, when wearing her school uniform and working at her uncle's cafe.

[[folder:Kotomi Komiyama]]
->'''Voiced by:''' Creator/KaoriMizuhashi

One of Yuu's old middle-school friends. She immediately takes a dislike to Tomoko, who sees Kotomi as a rival for Yuu's attention. Unfortunately, Kotomi proves to be just as passive-aggressive and anti-social as Tomoko.

Kotomi is formally introduced in the spin-off manga ''It's Your Fault My Friend's Not Popular'', and later on she is re-introduced in the main series. Kotomi does not appear in the anime as it only adapts stories from before her first appearance. However, she appears in a special {{OVA}}, bundled with the Japanese release of the main series's seventh volume.
* ACupAngst: Just like Tomoko.
* AlliterativeName: Both her first and last name begin with "K".
* AscendedExtra: She first appeared in Tomoko's flashback to her middle-school years in Chapter 30 of the main series as the third, unnamed girl running the the marathon with Tomoko and Yuu; she's only seen in three frames and has no speaking lines. In the spin-off series, starting with Chapter 2, she is one of the main characters. She then makes her formal debut in the main manga in Chapter 46.
* BerserkButton: Badmouthing her crush Tomoki, as Tomoko found out in chapter 54.
* {{Bookworm}}: Always shown reading a book during her job as the school librarian.
* ButtMonkey: Not only is her crush on Tomoki unrequited, as he barely knows she even exists, but the plots revolving around said crush tend to end with her in some embarrassing situation or otherwise miserable.
* TheCameo: She makes a short appearance in the OVA that's about a minute long, which constitutes the only time she's ever been animated (and voiced).
* CovertPervert: Revealed to be one in Chapter 7 of the spin-off, though she is in denial about it. Also, in chapter 91 of the main series she blurts out that she is interested in Tomoki's dick... in Tomoki's presence, no less. As of chapter 101 she seems to have accepted that this is a part of her personality.
* CrossPoppingVeins: When Tomoko pisses her off. Which is often.
* DontYouDarePityMe: If there's one thing Kotomi hates more than Tomoko being a {{Jerkass}} to her, it's the rare times when Tomoko actually expresses pity for her.
* {{Foil}}: To Tomoko. She's basically her but more proper looking and with more common sense.
* FriendlyRivalry: With Akari. They both pine for Tomoki, but so far there seems to be no animosity between the two, and Kotomi actually seems to care about Akari's well-being a bit. Kotomi encourages Akari to be honest about her feelings for Tomoki in chapter 101, and later, in chapter 108, she hesitates whether to tell Akari that Tomoki greeted her, because she didn't want to rub it in Akari's face. Akari, in turn, wanted to badmouth Kotomi when asked about her by Tomoki, but backed off when she realized that Kotomi's feelings for Tomoki are the same as her own. In chapters 112 and 113 Akari is even shown helping Kotomi prepare the Valentine's Day chocolates for Tomoki and it turns out it was Akari who convinced Kotomi to give the Valentine's Day chocolates to Tomoki.
* GameOfNerds: She's a massive baseball enthusiast who follows the Chiba Lotte Marines with almost religious zeal. Of note is that she knows the make, model, and plate number of every player's car on the team. Chapter 117 reveals that she was once a member of the baseball cheer squad.
* GreenEyedMonster: In chapter 83 she is [[LoveMakesYouCrazy distraught]] by the revelation that she has a romantic rival who is also interested in pursuing Tomoki (something [[SitcomArchNemesis Tomoko]] gleefully takes advantage of to troll her). She also does not take kindly to Yuri interacting with Tomoki in chapter 123.
* IAmWhatIAm: While Tomoko's accusations on her fixation with Tomoki's genitals used to be a source of angst, Kotomi has made peace with that perverse side of her and freely admits that she would in fact love to see his dick. As of chapter 101, Tomoko's accusations no longer bother her.
* ImpossiblyTackyClothes: In a clothes store she hinted an interest for cosplaying. In chapter 79 she looks like the protagonist of a Final Fantasy game. Averted on the beach trip, because Yuu chose her bathing suit.
* InSeriesNickname: "Komi-something". Also: "Glasses". Both given by Tomoko.
** FanNickname: Many fans use those nicknames.
* LoveMakesYouCrazy and LoveMakesYouDumb: Tends to lose her common sense and act irrationally whenever the plot involves her crush Tomoki in some way.
* {{Meganekko}}: Is actually a cute girl with glasses.
* MyParentsAreDead: [[spoiler:Has revealed that her father died from an illness when she was five. Yuu gets awkward, Tomoko... not much.]]
* NamedAfterSomebodyFamous: Fittingly, she shares the surname of [[https://en.wikipedia.org/wiki/Satoru_Komiyama Satoru Komiyama]].
* NotSoDifferent: Apparently neither she nor Tomoko had any friends in their class before befriending Yuu. She and Tomoko both like the same anime, got the same type of hairstyle in Chapter 3 of the spin-off, got insecure with Yuu's beauty in Chapter 4, found themselves unable to talk to guys [[spoiler:and ended up in the same high school. Chapters 47 and 48 of the main manga show her walking home from school alone and eating her lunch in the bathroom, implying that she doesn't have many friends in high school either]]. Notably this does not make them less hostile towards each other at all.
** Their NotSoDifferent nature is even lampshaded by the title of one of the 4-Komas from Chapter 7 of the spin-off, "Cut from the same cloth".
** [[spoiler: They appear to be showing some small progress when it comes to getting along. They accept having to hang together to be with Yuu during Summer break, and chapter 71 shows them taking a picture together (though it was played off as awkward).]]
** According to chapter 83 their similarity even extends to their appearance (at least whenever Kotomi is distraught and without glasses) [[spoiler:as they get mistaken for each other (albeit by someone who had little prior contact with either of them.]]
** [[spoiler: One could think that chapter's 83 title ("Because I'm Not Popular, I'll Tell Lies") was referring to Tomoko. While Tomoko does tell an obvious troll lie in the chapter, it is Komiyama who says the more significant lies.]]
* OnlySaneWoman: Has more common sense than her two friends, at least in matters not related to her crush Tomoki or potential romantic rivals.
* OpaqueNerdGlasses: Sometimes she is presented like this depending on the situation. Her glasses are a little variant of this trope because they are not so big.
* {{Otaku}}
* PrecisionFStrike:
--> ''[[InnerMonologue "That fucking bitch!"]]''
* RightInFrontOfMe: In Chapter 2 of the spin-off she tried to break the ice with Tomoko by telling her a story about having a laugh in the previous year when she heard that some middle schooler was still riding a bike with training wheels. Guess who that middle schooler was?
* SitcomArchNemesis: With Tomoko. She dislikes Tomoko because the latter tends to act like a {{Jerkass}} towards her for [[GreenEyedMonster reasons she can't fathom]], and only ever strikes back at her when provoked.
* StalkerWithACrush: Acts like this towards Tomoki in some chapters, though this is PlayedForLaughs. In chapter 88 she is shown taking photos of him during the athletics meet, getting turned on when he is made to wear baseball uniform and hoping he would be wearing the kind of uniform where the understocking is showing. In the very next chapter, when let into Tomoki's room by Tomoko, she considers looking through his drawers or his trash before deciding to lie in his bed instead.
* TeethClenchedTeamwork: In spite of their mutual dislike, she and Tomoko are at least willing to cooperate to keep Yuu happy.
* UnknownRival: When they reunite in Chapter 46 of the main story, Tomoko has forgotten about Kotomi. On the other hand, Kotomi bears a grudge against Tomoko. (The next chapter reveals that they didn't spend all of their middle-school years in the same class.) Now both are aware of the other's dislike.
* VitriolicBestBuds: With Tomoko on their ''best'' of days, particularly past Chapter 57. On their worst, it's a SitcomArchNemesis relationship.
* WideEyesAndShrunkenIrises: When she is surprised and/or angry.
* WithFriendsLikeThese: Yuu is the only link that makes her and Tomoko tolerate each other.
* YouAreWhatYouHate: The reason she despises Tomoko. Both are antisocial and their OnlyFriend is Yuu. Each one of them believes the other is below her.

->'''Voiced by:''' Creator/RieKugimiya (Japanese), Juliet Simmons (English)

Tomoko and Tomoki's thirteen-year-old cousin and a seventh-grade schoolgirl. Having been fed a steady stream of face-saving lies by Tomoko, she idolises her older cousin.
* AnnoyingYoungerSibling: Ever since she lost Kii's respect, Tomoko has come to see her cousin as this and always dreads their meetings.
* AudienceSurrogate: Her reaction to Tomoko's card game.
* BrokenPedestal: How she sees Tomoko after all her attempts to look cool backfires spectacularly on her. Unlike other examples though, she takes the revelation well, and the next time they meet her admiration is replaced not with utter disdain, but with pity and appreciation that at least she tried her best.
* CreepyChild: When she gets in a bad mood, Kii becomes very...unsettling. It's bad enough that Tomoko regards her as TheDreaded and she's always painted in a sinister light in Tomoko's dreams. [[spoiler:To say nothing of the nightmare she had where Kii-chan implicitly [[BlackComedyRape raped her with an eggplant.]] As Tomoko woke up from that nightmare it turned out that Kii was actually in her room, watching her sleep.]]
* DeathGlare: Pulled one mixed with a ThousandYardStare when she was angry with Tomoko, also...
-->''"No! Just take it."''
** This has become a regular expression for her when she is angry, with an added {{Stepford Smile|r}}.
* InnocentlyInsensitive: She means well when she tries to take care of Tomoko after finding out the truth about her, but so far her actions just drive it home to Tomoko how pathetic she has gotten.
* NiceGirl: An unusual role for a Type-A {{Tsundere}} specialist like Creator/RieKugimiya. She's so nice she doesn't harbor any grudge against Tomoko for unwittingly breaking her good impression of her.
* OnlyKnownByTheirNickname: Until chapter 60, where it's revealed that her name is Kiko.
* ReplacementGoldfish: In chapter 60 Tomoko speculates that Kii tries to take care of her because she treats her as a replacement for her deceased dog. [[spoiler: At the end of that chapter Kii even gives Tomoko that dog's hairpin (the one she is always wearing).]]
* TokenMiniMoe
* UnwantedAssistance: She wants to help Tomoko become a better person, but Tomoko, who knows she's driven by pity and finds Kii's efforts demeaning, wants nothing to do with it.
* WideEyesAndShrunkenIrises: Whenever she gets unpleasantly surprised, aggravated, disapproving, or devious, her eyes take on this look, which never fails to unnerve Tomoko. This is practically her default look in Tomoko's mind, since Kii always has these eyes whenever Tomoko thinks or dreams about her.

[[folder:Megumi Imae]]
->'''Voiced by:''' Creator/AiNonaka (Japanese), Juliet Simmons (English)

President of Tomoko's (and later Tomoki's) student council.
* EarlyBirdCameo: In the anime, when she replaces the random girl holding the stack of papers that Tomoko accidentally runs into. Downplayed because this first appearance is an earlier part of the chapter/episode she would appear in.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Toshiaki_Imae Toshiaki Imae]].
* NiceGirl: Some female students mention that she's popular with both boys and girls at the school due to her helpfulness. She is noticeably kind and even protective toward Tomoko, and regularly goes out of her way to watch over the latter.
* PutOnABus: Since she's a year older than Tomoko, she graduates at the end of Tomoko's second year of high school.
* StudentCouncilPresident
* ThrowTheDogABone: She does this frequently for Tomoko.
** Chapter 21[=/=]Episode 12: [[spoiler:Seeing Tomoko down after Yuu leaves at the end of the school festival, Megumi borrows a mascot costume and gives her a hug and a balloon. In Episode 12, she also mentions having to keep an eye on that "cute girl" after Tomoko ends up getting flustered out of trying to strike up a conversation with her after a gust of wind gave her a good view of Megumi's panties.]]
** Chapter 42: Steps in once she sees Ogino browbeating Tomoko at the school gate for being such a loner, going so far as to say that she's her friend.
** Chapter 50: She helps Tomoko after the latter slips in the hall, and accompanies the latter to the infirmary to have her nosebleed looked at.
** Chapter 98: Despite her home being in the opposite direction, she joins Yoshida in walking Tomoko to the train station, after Tomoko gets stuck at school due to the rain.


[[folder:Hina Nemoto]]
->'''Voiced by:''' Yūko Kurose (Japanese), Creator/MargaretMcDonald (English)

Tomoko's classmate and the first person in Tomoko's class that Tomoko is able to talk to on a semi-regular basis.
* AdaptationDyeJob: Subverted. She seems to have light-colored hair in the manga, and the cover of volume 11 (published after the anime concluded) shows her with red or pink hair, while she has brown hair in the anime. However, in the manga she dyes her hair, and the flashback in chapter 110 shows her natural hair color is indeed brown or black.
* AscendedExtra: Appears as a background character as early as chapter 4 of the manga/the first episode of the anime. She becomes a recurring character starting with chapter 39.
* BitchInSheepsClothing: While she was the first person to make an effort to talk to Tomoko semi-regularly, and generally comes off as a polite and friendly person, Tomoko's efforts to get closer to her reveal that she is quite callous. Despite being nice to Tomoko, she still clearly looks down on her as an outcast and has no desire to be friends with her, to the point of cheerfully insulting her attempts at making conversation by trashing Tomoko's taste in the anime. Later chapters hint that Hina might not necessarily look down on Tomoko, but she certainly is worried that hanging out with a known loner and weirdo could undermine her attempts to fit in with the popular kids. She might actually like Tomoko, or at least she respects her because Tomoko does not hide her nerdy and quirky side to get along with her classmates, unlike Hina herself. [[spoiler:In chapter 117 she wants to ask Okada whether Tomoko will be in the same class as the two of them during their third year of high school, but decides that it would be weird of her to ask about that. In chapter 122 she is actually disappointed when she finds out that Tomoko wants to give an ordinary introduction on the first day of their third year of high school, noting that Tomoko turned into a normal girl.]]
* ClosetGeek: Likes SliceOfLife anime and wishes to be a voice actress, which she hides from her friends. [[spoiler:In chapter 97 she tells Tomoko they can talk about anime from time to time, but only in secret.]]
* {{Foil}}: She is pretty much what Tomoko would be like if she had better social skills and cared about fitting in with the popular crowd--while keeping her geeky hobbies and abrasive attitude.
* ForgottenFirstMeeting: Chapter 110 reveals that she and Tomoko took their high school entrance exam together, and afterwards even talked briefly and fist bumped. However, Tomoko ignored Hina when she was trying to introduce herself. Zig-zagged, as Tomoko remembers the meeting itself, but not that the girl she met was Hina. [[spoiler:Even in chapter 117, after Hina made an impersonation of Tomoko that directly referenced the event, Tomoko still has trouble connecting the dots.]]
* IAmWhatIAm: Zigzagged in chapter 122. [[spoiler:Tomoko boldly proclaiming that she is looking for a boyfriend during her introduction at the beginning of the third year of high school inspires Hina to stop being a ClosetGeek and admit that she wants to be a voice actress in her own introduction. However, Tomoko notices that her hands are shaking afterwards, and Hina asks Tomoko to teach her how to live as a loner if the worst comes to the worst, showing that Hina isn't sure that she did the right thing.]]
* InSeriesNickname: Tomoko comes up with a nickname "Nemo" for Hina, but she only uses it in her inner monologues [[spoiler:until chapter 126, when she says it out loud, and Hina demands her to use it when talking to her from now on]].
* LivingProp: Started out as this. In the early chapters and in the anime she was simply yet another popular kid in the background, and she had even less presence than [[ThoseTwoGuys Okada and Kiyota]]. Hina's line in chapter 39, when she notes that her presence is usually forgotten, [[LeaningOnTheFourthWall seems to refer to this more than to anything shown in the story itself]]. Her importance in the story gradually increases starting with that very chapter, where she and Tomoko talk for the first time.
* MistakenForGay: After Hina lends her some chapstick, Tomoko interprets it as an IndirectKiss and starts to believe her classmate must be a lesbian who has a crush on her. Tomoko seems quite open to the idea of swinging the other way, despite her insistence that she is completely straight...until Hina shares her chapstick with another girl, [[YourCheatingHeart leading Tomoko to assume she just got two-timed]].
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Shunichi_Nemoto Shunichi Nemoto]].
* NotSoDifferent: The way she looks down on Tomoko is quite similar to how Tomoko herself looks down on most of the otakus she encounters as losers.
* TheUnsmile: Hina almost ''never'' stops smiling. She keeps smiling even when she's angry or annoyed, and Tomoko finds those particular expressions of hers very unnerving.
* UnwantedAssistance: On two occasions her well-meaning attempts to reach out to Tomoko ended rather poorly for Tomoko:
** In chapter 39, when the time comes for Tomoko to introduce herself at the first day of her second year, it turns out that Hina not only thought that Tomoko's introduction at the beginning of the first year was great, but also told everyone about it, and thus everyone in the class is looking forward to another great introduction. This causes Tomoko to panic and publicly embarrass herself.
** In chapter 43, Hina gets curious about what Tomoko is searching the Internet for on her phone (during class) and asks Tomoko about this. This startles Tomoko so much that she drops her phone and it ends up in their teacher's hands with some NSFW images still onscreen.

[[folder: The Kuroki Parents]]
->'''Mrs. Kuroki voiced by:''' Creator/RisaHayamizu (Japanese), Creator/ShelleyCaleneBlack (English)
->'''Mr. Kuroki voiced by:''' Ryō Iwasaki (Japanese), Creator/DavidWald (English)

Tomoko's and Tomoki's parents.
* ADayInTheLimelight: Well, "limelight" isn't exactly right, but the chapter "Because I'm Not Popular, I'll Spend Time With My Dad" marks the first time Mr. Kuroki has ever had a significant amount of screen time, and focuses on Tomoko going on a fishing trip with him.
* CreepyShadowedUndereyes: Like both of her children, Mrs. Kuroki sports a pair of these. Though unlike theirs, hers are substantially less visible. Also, judging from [[https://www.reddit.com/r/watamote/comments/61m6y4/volume_11_bonus_postcard_young_watamom_and_her/ a bonus drawing by Nico Tanigawa]], she got her eye bags at a later age than her kids did. Mr. Kuroki is also revealed to have these in the single panel where we get to see one of his eyes reflected in a rear view mirror.
* DisappearedDad: While Mr. Kuroki ''has'' made a small number of appearances, they can be counted on one hand and are extremely brief. At all other times, it can be easy to forget that Tomoko even has a dad. Presumably justified by the fact that he is almost always at work supporting his family.
* TheFaceless: During the few occasions where he actually appears, Mr. Kuroki's face is never completely shown. We've been shown, at various different points, his hair, mouth and eyes, though, so we have a decent idea of what he looks like.
* LockedOutOfTheLoop: Mrs. Kuroki has no idea that Tomoko is a loner with no friends [[spoiler:until chapter 90, when Ogino mentions this during their parent-teacher conference]]. In fact, Tomoko actively tried to hide this from her mother, e.g. by lying to her about having fun with her classmates in one of the Christmas specials. Mr. Kuroki has it even worse, getting almost all of his information about his children secondhand from his wife.
* NoNameGiven: The only reason we even know their last name is because we know their children's. They're exclusively called "mom" and "dad" in-universe.
* ParentalFavoritism: Played with. Mrs. Kuroki loves both Tomoko and Tomoki equally, but is often exasperated at her daughter for being lazy and irresponsible. This causes Tomoko to become slightly resentful whenever her mom praises Tomoki for his maturity and self-reliance.
* {{Salaryman}}: Judging from his usual clothing of a suit and the fact that he's almost never around the house due to being too busy working, Mr. Kuroki is one of these.
* StrongFamilyResemblance: Mrs. Kuroki was shown to resemble a tidier-looking Tomoko when she was younger, and, from what we've seen of his face, Mr. Kuroki resembles an older Tomoki.
* WhatTheHellHero:
** After Tomoko complains about having to help with housework, Mrs. Kuroki calls her out on the fact that Tomoki not only helps out without complaint, but he does so on top of also having Club Activities and studying for his High School Entrance Exam.
** When Tomoko forgets to mail Tomoki's application to the entrance exams for a school in Saitama, the furious mother subjects her daughter to a very harsh lecture about how she ruined her brother's future.

->'''Voiced by:''' Sanae Nakata (Japanese), Beth Lazarou (English)

Tomoko's P.E. teacher. During Tomoko's second year she becomes Tomoko's homeroom teacher.
* AdultsAreUseless: Zig-zagged. She is one of the few people who actually noticed how isolated Tomoko was in her class, questioned her about it and tried to help her. Unfortunately, her initial efforts to help Tomoko make friends failed due to her bluntness and mostly just put Tomoko in more awkward situations. However, Ogino grouping Tomoko with Yoshida, Yuri and Ucchi for a school trip did result in Tomoko's social circle expanding a bit, as after the school trip Tomoko started regularly hanging out with Yuri [[spoiler:(who ended up viewing Tomoko as a friend)]] and occasionally interacting with Yoshida (though this turned out to be at best a mixed blessing for Tomoko).
* AscendedExtra: Made her first, brief appearances in chapters 10 and 25 of the manga. Once she became Tomoko's homeroom teacher she was also given a larger role in the story.
* BoyishShortHair: Makes her look androgynous as a result.
* CannotKeepASecret: Zig-zagged. She likes to spill out her students' secrets as long as she doesn't mention their names.
* CoolTeacher: ''Attempts'' to be one, at least. She frequently tries to help Tomoko come out of her shell and socialize, and generally acts like a relatively lenient ReasonableAuthorityFigure when around her. Unfortunately, all of her efforts end up being seen as UnwantedAssistance by Tomoko, causing her to develop something of a grudge against her.
* DeconstructedCharacterArchetype: Of the CoolTeacher trope. Her efforts to connect with her students on a personal level end up making them view her with contempt as an invasive annoyance rather than as a mentor that they can confide in.
* LastNameBasis: Justified due to her being a teacher that Tomoko isn't particularly close to.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Takashi_Ogino Takashi Ogino]].
* ReasonableAuthorityFigure: While Ogino can be very stern and authoritative, she is willing to let things slide in extenuating circumstances. For instance, when Tomoko's field trip group tried sneaking out at night to get some food, she allowed them to go to a nearby convenience store since they slept past dinner, provided she accompany them.
* UnwantedAssistance: Tomoko's opinion on her attempts to help her make friends. Hina didn't seem thrilled about Ogino helping her prepare for her future career as a voice actress, either.

[[folder:Masaki Yoshida]]

A girl with blonde hair and a bad temper that Tomoko has a habit of pissing off.
* AsleepInClass: If she's attending class, chances are good she's sleeping at her desk.
* BerserkButton: When first introduced she has two: 1) perverted acts in general, especially being groped, and 2) being called a delinquent. [[NoSocialSkills Tomoko]] being [[AccidentalPervert Tomoko]], she manages to repeatedly hit both these buttons, and it seems she is becoming yet another BerserkButton for Yoshida.
* DelinquentHair: She's a bleached blonde.
* FaceOfAThug: Certainly ''looks'' like a standard delinquent girl, but is heavily suggested to simply be an ordinary girl who is into punk fashion that Tomoko just ''assumes'' is a delinquent.
* {{Flanderization}}: Early chapters portrayed her as an ordinary girl with a FaceOfAThug who Tomoko was exceptionally good at pissing off. By the latest chapters, she seems to possess a HairTriggerTemper that can be set off by basically anything, regardless of who or what they are. She also generally yells and swears with much more frequency.
* GirlsLoveStuffedAnimals: She seems to have an affinity for cute things in general.
* GoofyPrintUnderwear: Tomoko mentions that she wears Hello Kitty-print panties. A later chapter suggests that ''all'' of her underwear features cute mascot characters on them, to the point where Tomoko claims that the fact that she wears them is an OpenSecret.
* HairTriggerTemper: She is always quick to threaten or even hit Tomoko, sometimes with little provocation. On the other hand she doesn't act like this when interacting with other characters, so maybe it's just that Tomoko is really good at hitting her {{Berserk Button}}s. Notably, in chapter 106 she does not lash out at her friend who called her a moron to her face. Chapter 123 shows that she can be quite friendly, even to people she barely knows, when in a good mood.
* HiddenDepths: Despite what Tomoko thinks of her, she is shown to like cute things, couldn't recognize a love hotel when every other character could and apparently plans to celebrate her [[https://en.wikipedia.org/wiki/Coming_of_Age_Day Coming of Age Day]] in Disneyland.
* HotBlooded: The angry type. She also gets extremely fired up when she's excited about something, such as when talking about how cool Disneyland is.
* HugeSchoolGirl: Much taller than her female classmates, which stands out especially when opposite [[OlderThanTheyLook Tomoko]].
* JapaneseDelinquents: Invoked in-universe, as Tomoko is completely convinced Yoshida is a delinquent. As Tomoko was repeatedly shown to be WrongGenreSavvy, this may or may not be correct.
* JerkWithAHeartOfGold: While she's generally angry and annoyed, this is mostly because she is justifiably pissed off at Tomoko for saying or doing something insensitive to her. Otherwise, she is shown to be a relatively pleasant person who seems to actually like Tomoko to some degree.
* LastNameBasis: Mostly because Tomoko hasn't bothered to learn her first name. It isn't until she introduces herself to her third year class several chapters after her debut that we learn her full name.
* MisunderstoodLonerWithAHeartOfGold: Her intimidating appearance and short temper cause others to overlook her softer side. In a sort of twist on this trope, Tomoko ''also'' completely overlooks her softer side when interacting with her, but interacts with her much more openly than others do, allowing Yuri (and the reader) to see that there's more to her than her tough looks.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Yuta_Yoshida Yuta Yoshida]].
* NotHelpingYourCase: Beating up Tomoko for calling her a delinquent only further convinces Tomoko that Yoshida is a delinquent.
* OddFriendship: She and Tomoko couldn't be any more different, and going off of most of their interactions, you'd think they'd hate each other's guts. In reality, they're both pretty much friends, even if neither really acknowledges it.
* PerpetualFrowner: There's a seldom a moment when she isn't scowling, which only fuels how intimidated Tomoko is by her.
* PervertRevengeMode: Her preferred response to Tomoko's antics.
* PetTheDog: She does occasionally do nice things for Tomoko, like offer to share an umbrella as they walk home on a rainy day. It's just that Tomoko always runs her mouth off at the wrong time and gets punched in the face. In chapter 116 she actually drags Tomoko over to Megumi, who was graduating, so that Tomoko, who was too nervous to approach, could say good-bye.
* TomboyWithAGirlyStreak: A tough-talking and thuggish girl who likes all things cute and is generally pretty naive and innocent.
* {{Tsundere}}: A platonic example. She's almost always (justifiably) pissed off at Tomoko, but still seems to like and care about her.
* VitriolicBestBuds: The vast majority of her interactions with Tomoko consist of Tomoko saying or doing something insensitive or perverted to her and Yoshida responding with anger and violence. To onlookers, Yoshida appears to be bullying her. Despite this, however, she is shown to genuinely like Tomoko somewhat, and is gradually becoming one of the closest things she has to a friend.

[[folder:Yuri Tamura]]

A fairly ordinary girl from Tomoko's class who ends up in her group for their class trip after a falling out with her friend.
* AudienceSurrogate: She's more or less taken up the role of the audience's representative within the story in recent chapters. She's a bit of a loner herself, but not nearly to the same degree as Tomoko, and while she is constantly bewildered by the other girl's behavior, she is also both amused enough by it to develop a fondness for her and empathetic enough to it to develop a sense of kinship with her.
* BerserkButton: While Yuri is not fond of Minami to say the least, most of the time she is able to stay calm even in Minami's presence. However, in chapter 124 [[spoiler:when Mako calls her out on barging into Tomoko's meeting with Yuu and points out that she is acting like Minami would, Yuri actually punches Mako's arm in anger.]]
* CloudcuckoolandersMinder: In chapter 106, she prevented Tomoko from saying something to Yoshida that would get her punched. Overall, she has a better grasp on what kind of person Tomoko is than the rest of the school.
* TheHeart: Since Tomoko, Mako, and Yoshida are more friends with her than they are with each other, Yuri is pretty much the glue that holds them together. Despite being an introvert, she convinces them to attend the class end-of-the-year party with her just so they can all have one last chance to hang together.
* GreenEyedMonster: A (presumably) platonic version of this trope occurs in Chapter 124 [[spoiler: when Yuri barged into the meet-up Tomoko was having with her middle school friends and made the conversation all about shared field trip stories because she was jealous of the pet names and other displays of intimacy between Yuu and Tomoko. Yuri's jealousy reemerges in chapter 126 when she sees Tomoko and Hina calling each other nicknames, to the point when Hina notices Yuri giving her a DeathGlare in a group photo]]. It also seems that Minami's attempts to include Mako in her GirlPosse are at least one of the reasons for Yuri's dislike of Minami.
* HiddenDepths: Seems like a stoic and even apathetic girl at first, but later chapters show that she is strongly attached to the few friends she managed to make, and treasures their company. She is also shown to have something of a jealous streak.
* InSeriesNickname: In Chapter 124, Tomoko considers calling her by a nickname after knowing her for so long, indicating that she conceivably might receive one of these in the near future. [[spoiler:Chapter 126 shows that the fact that Tomoko did not come up with a nickname for her is a sore spot for Yuri.]]
* LoonyFriendsImproveYourPersonality: Zig-zagged. Yuri's friendship with Tomoko and Yoshida seems to make Yuri more expressive and openly affectionate to her friends, but eventually it also brought her issues with jealousy to light.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Tatsuhiro_Tamura Tatsuhiro Tamura]].
* NiceGirl: While she thinks Tomoko is a bit of an idiot, she nevertheless treats her with respect and kindness, and even invites Tomoko to eat lunch with her and her friend Mako in chapters 82 and 84.
* NoodleIncident: She spends most of the Class Trip thinking about how to make up with her friend Mako, but it's never said what caused the falling out, and they seem to have made up by the end.
* NotSoDifferent: Her social life isn't actually that much better than Tomoko's. Both girls are shown to only have one person they consider a true friend (who in both cases is a girl who is more popular and sociable than themselves - Yuu in Tomoko's case, Mako in Yuri's) and aren't shown to be socializing much with other students (though eventually Tomoko and Yoshida become Yuri's friends). Before the second year class trip, when Yuri found out that she can't be in the same group as Mako, she did not join any other group of her own will. The main difference is that Yuri's OnlyFriend is in the same school and class as Yuri, unlike Yuu. [[spoiler:During the class farewell party in chapter 120, when Yuri gets separated from Mako, Tomoko and Yoshida, she is actually the only one who completely fails to socialize with the rest of her classmates.]] Furthermore,[[spoiler: when she first meets Yuu in chapter 124, her behavior towards Yuu resembles a toned-down version of Tomoko's middle-school behavior toward Kotomi, exhibiting the same sort of paranoia about losing Tomoko to someone better that Tomoko displayed about losing Yuu to Kotomi. After she is called out for her behavior, she implicitly invokes this trope herself, saying that ''neither'' she ''nor'' Tomoko were truly nice people like Yuu.]]
* OnlySaneWoman: She notices how much of an idiot Tomoko is, but still makes an effort to befriend her. She does the same for Yoshida. She's by far the most normal of the three and usually takes it upon herself to try and keep them civil with each other.
* OrdinaryHighSchoolStudent: Probably the single most ordinary character in the entire series.
* TheStoic: Downplayed. She's not emotionless, but she maintains a pretty firm poker face no matter what happens around her.
* UnfazedEveryman: Her reactions to her new kind-of-friends' behaviors are much more subdued than you'd expect.
* WhenSheSmiles: She very rarely smiles, and when she does, she'll always be quick to hide it. She almost never laughs either, so when a biting remark from Tomoko gets a small chortle out of Yuri, Mako reacts with visible happiness that someone could actually make Yuri do that.


A popular girl from Tomoko's class who has strange eyes and has similar hair to Yuu. After spending most of her time with her friends in a different group during the class trip, the short time she actually spends with Tomoko permanently sours her opinion of her.
* AllGirlsWantBadBoys: Bad ''girls'' in this case. In Ucchi's mind, Tomoko is a [[ReallyGetsAround sexually promiscuous]] creeper who peeped on her in the shower, stole her panties, watched her while she slept, stalked her relentlessly, and makes a pass at just about every attractive girl she encounters. While it scared her at first, it also got Ucchi interested.
* AmbiguouslyGay: She thinks Tomoko is stalking her to sexually harass her, [[RapeAsComedy maybe more]], which of course frightens her, but when it looks like Tomoko isn't interested in her, Ucchi becomes noticeably miffed.
** In later chapters it starts to look like she might actually have a crush on Tomoko, going by her reaction to Tomoko giving her a secret "Thank You" note or how she was able to instantly tell Tomoki was Tomoko's brother just by looking at his face. [[spoiler:In chapter 112 she actually leaves Valentine's Day chocolates in Tomoko's locker. In chapter 117 she openly admits in front of Hina, Okada and Kiyota that she finds Tomoko's creepiness strangely charming. And in chapter 122 she has a breakdown in public when she finds out that she and Tomoko won't be in the same class during their third year of high school.]]
* ArentYouGoingToRavishMe: Due to Tomoko's [[NoSocialSkills mannerisms]], [[AmbiguouslyBi comments]] and [[CovertPervert actions]] when interacting with her, she's convinced Tomoko is stalking her, and is obviously creeped out when Tomoko is trying to peek under her skirt. However, when she notes her also peeking under the skirts of other girls, her reaction shows this:
--> "So long as you've got a girl to stare at, you don't care who it is?!"
** She later has the same reaction again when she sees Tomoko going shopping with Yuu, who looks similar to herself. Ucchi is convinced that Tomoko is trying to replace her with Yuu.
* AscendedExtra: Made a brief appearance in chapter 59 (as the girl sitting next to Tomoko in a bus and ignoring her to chat with her friends instead) before becoming a recurring character.
* CrushBlush: She does this more and more around Tomoko.
* {{Flanderization}}: In the chapters that followed the second year school trip she was at first portrayed as legitimately creeped out by Tomoko, but with hints that her interest in Tomoko might go beyond that. She gradually turns into a SmittenTeenageGirl who is completely obsessed with Tomoko, actively looks for opportunities to meet her and seems to be disgusted with Tomoko [[GreenEyedMonster only when she thinks that Tomoko is flirting with other girls]].
* {{Foil}}: To Yuu. They both have active social lives, fairly similar appearances, and a connection of sorts to Tomoko. However, while Tomoko bears an obvious lust for for Yuu, who knows absolutely nothing about it, Ucchi misinterprets ''everything'' Tomoko does as being in relation to a perverse lust towards ''her''. That, and Ucchi appears to be well on her way to developing a lust for Tomoko, who has no clue about it.
* GreenEyedMonster: Whenever Tomoko shows or receives attention from someone who isn't Ucchi, Ucchi always reacts with visible jealousy. In one of the panels in chapter 115 she can be [[FunnyBackgroundEvent seen in the background]] angrily clenching her teeth as she watches a graduating upperclassman patting Tomoko's head.
* HeWhoFightsMonsters: Her beliefs that Tomoko is a creepy stalker who's utterly obsessed with her are so strong that Ucchi has in turn taken to obsessing over Tomoko and effectively stalking ''her''.
* HypocriticalHumor: By all accounts, she's guilty of everything she accuses Tomoko of being. [[spoiler:For instance, when Tomoko leaves some chocolates for Ucchi in her locker, Ucchi calls her a creep for not giving them to her in person, even though she did the exact same thing the day before.]]
* IdenticalStranger: Somewhat resembles ([[NonstandardCharacterDesign a highly-simplified]]) Yuu. This actually gets [[LampshadeHanging lampshaded]] in one chapter, where, after seeing them together, Ucchi assumes Tomoko is using Yuu as a proxy for her.
* LoveMakesYouCrazy: Ucchi's growing obsession with Tomoko has made her act increasingly more erratic. She stares at her intensely from a distance, actively stalks her, tries to contrive meetings and encounters with her through incredibly roundabout ways, and throws childish tantrums every time something gets between her and Tomoko.
* MeaningfulBackgroundEvent: She doesn't say or do anything every chapter, but she can often be seen in the background. [[StalkerWithACrush Always watching Tomoko]]. Crosses over with FunnyBackgroundEvent with some of the humorous expressions she makes, particularly whenever she starts [[GreenEyedMonster angrily gritting her teeth]] every time Tomoko pays any sort of attention to someone else.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Tatsuya_Uchi Tatsuya Uchi]].
* NonStandardCharacterDesign: Always has BlackBeadEyes. It's so unusual, that even in-universe, Tomoko compared her to an emoji.
* NotSoDifferent: She has more similarities to Tomoko than she realizes or would care to admit.
** Both tend to make negative snap judgments about other people, and in particular take the most innocuous things as proof of perversion.
** Both have feigned sleep in order to silently observe the other.
** Both have tried to wake Yoshida up by tickling her (and got punched in the process).
** Both get flustered around people that interest them (Tomoko to attractive boys, and Ucchi to Tomoko).
** Both display AmbiguouslyGay [[AmbiguouslyBi and/or Bisexual]] tendencies while being in complete denial about it. Tomoko insists that she's straight even though she lusts after Yuu, makes a habit of looking up girls' skirts, and enjoys close physical contact with females, while Ucchi constantly rails against Tomoko in her head even as she offers gifts to her.
** Both have a NonStandardCharacterDesign that makes them stand out from everyone else. Tomoko has incredibly large, roughly-drawn eyes, while Ucchi's are small and beady.
** Ucchi's plan to get herself invited into Tomoko's group during the trip to Disneyland in chapter 125 (lamenting her bad luck and wishing for someone to help her within Tomoko's and her friends' earshot) is very similar to Tomoko's plan to make her schoolmate invite her to watch fireworks together back in chapter 12. Though the big difference is that Ucchi did not give up when her plan failed.
* OnlyKnownByTheirNickname: Until chapter 114, where her surname (内, Uchi) can be seen on her locker [[spoiler:when Tomoko is looking for her locker to leave the Valentine's Day chocolates there]]. "Ucchi" is just what her friends call her. Tomoko doesn't even ''know'' her actual nickname due to how little time they actually spend directly interacting, and instead just calls her "emoji girl".
* RightForTheWrongReasons: She's one of the few people who sees Tomoko for the perverted creeper she is, but only because she comically misunderstands everything Tomoko does, no matter how innocuous, as having perverted intentions.
* StalkerWithACrush: Thinks Tomoko is hers. [[HeWhoFightsMonsters In her paranoia, she has become Tomoko's]].
* SuspiciouslySpecificDenial: As much as she loves to talk about how creepy and weird Tomoko is, she sure doesn't seem to mind her. [[spoiler:Chapter 114 shows her to be somewhat pleased that Tomoko gave her chocolate for Valentine's Day, and as she's inwardly berating the fact that it looks like poop, she's still eating it.]]
* ThroughHisStomach: She's making a habit of trying to attract Tomoko's attention via food, [[spoiler:first by making [[ChocolateOfRomance chocolates for her on Valentine's Day]], and later by grilling and seasoning a strip of meat at a Korean BBQ restaurant - and then sneaking it onto Tomoko's plate.]]
* {{Tsundere}}: A quiet, long-distance variation. Whenever she thinks about Tomoko, her thoughts are always full of unmitigated disgust, but she frequently goes out of her way to do nice things for her (complete with extensive rationalization [[SuspiciouslySpecificDenial that it's not because she likes her or anything]]), and blushes whenever Tomoko returns the favor.

[[folder:Akari Iguchi]]

Tomoki's classmate from middle school, and later also from high school. Revealed to have a crush on Tomoki, much to Kotomi's distress.
* AscendedExtra: She made her first, brief appearances in chapter 25/episode 3 of the anime (as one of the girls who brought Tomoki printouts from school when he was sick) and in chapter 41 (where she was revealed to have a crush on Tomoki). After chapter 83 she becomes a recurring character.
* BrokenPedestal: [[spoiler: Eventually when she figures out that Kotomi isn't Tomoki's sister. She's willing to admit, at least in her InnerMonologue, that the girl is a huge pervert.]]
* ButtMonkey: Pretty much every chapter featuring Akari will just end with her flustered and humiliated.
* CannotSpitItOut: She turns into a ShrinkingViolet in Tomoki's presence and is paralyzed by fear of embarrassing herself in front of him, which prevents her from confessing her feelings. It doesn't help that the one time she mustered the courage to try to act on her crush did result in her embarrassing herself in front of Tomoki in chapter 91.
* ImaginaryLoveTriangle: For a few chapters she was convinced that Tomoko is her romantic rival. Neither Tomoko nor Tomoki had any idea she felt that way.
* InSeriesNickname: After the events of chapter 91, Tomoko coins "Dicky-chan" for her.
* LoveHurts: So far her crush on Tomoki has only caused misery and embarrassment for her.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Tadahito_Iguchi Tadahito Iguchi]].
* NiceGirl: [[spoiler: When straight out asked about Kotomi by Tomoki, she thinks for a moment of admitting that she thinks Kotomi is perverted but sympathizes too much with her affection for Tomoki to actually do so. She insteads tells him that Kotomi is a really innocent girl.]]
* ParalyzingFearOfSexuality: Later chapters show that Akari believes [[SexIsEvil having sexual desires is something that makes one "impure"]]; as a result, she spends the first chapters after becoming a recurring character insisting that her crush on Tomoki has no sexual element whatsoever. In chapter 101 she finally acknowledges that she is also sexually interested in Tomoki, but this realization makes her loathe herself; in chapter 108 she calls both Kotomi and herself "[[SlutShaming vulgar perverts]]" in her thoughts.
* PyrrhicVictory: Feeling some measure of animosity for Tomoko during the sports meet due to the latter seeming to have some kind of relationship with her crush, Akari soundly beats her in a cavalry battle. However, not only does the victory feel shallow to her, but it gave Tomoko a chance to grope her, figure out her bra size, and report it to Tomoki. Akari gets nothing but thorough humiliation.
* UnknownRival: For the longest time, Tomoko had no idea that Akari considered her to be her chief rival for Tomoki's affections.
* UnwantedAssistance: Gets some from her friend, Sayaka, in chapter 95 when the latter attempts to debate Akari's so-called perverted tendencies with Tomoko. All she ends up doing is embarrassing poor Akari and further solidifying Tomoko's impression of her.
-->'''Sayaka''': Akari's been in love with Tomoki-kun since middle school! She's just a pure-hearted girl who wants to see Tomoki-kun's dick! \\
'''Akari''': Please just stop!
* WrongAssumption: She makes two in chapter 83, when she manages to both mistake Kotomi for Tomoki's sister[[note]]though Kotomi was also at fault here, as she wanted to take advantage of the misunderstanding in order to discourage Iguchi from romantically pursuing Kotomi, and thus did not correct Iguchi[[/note]] and mistake Tomoko for Tomoki's suitor.

->'''Voiced by:''' Creator/JunFukushima (Japanese), Johnny [=DeLaCerda=] (English)

A friendly older student who lent a sleeping Tomoko his umbrella during a rainy day. Since then, she's developed a crush on him.
* AnimeHair: Complete with a little tuft of hair across his face
* {{Bishonen}}: He's drawn with a noticeably more feminine face than most other male characters, and is seen as very attractive by Tomoko.
* BoyfriendBluff: Tomoko attempts to pretend that she's dating him in an effort to impress Kii-chan. It works at first, but she's eventually forced to tell the truth after Kii-chan [[NotWhatItLooksLike mistakes him tutoring another girl]] for [[YourCheatingHeart him cheating on Tomoko]] and confronts him.
* LastNameBasis: He only told Tomoko his last name when introducing himself to her, further demonstrating how nonexistent their "relationship" actually is.
* LoveInterest: A one-sided and very minor example. Tomoko has a crush on him, but she also barely knows him. While he's pleasant towards her whenever they meet, he also pretty clearly doesn't harbor any particularly strong feelings for her.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Makoto_Kosaka Makoto Kosaka]].
* NiceGuy: Seems to be generally pleasant and kind, giving Tomoko his umbrella during a rainy day and acting patiently towards her usual awkwardness. The second time we see him, he's tutoring a girl, once again showing that he's a helpful individual.
* OldSchoolChivalry: Appears to be a rather classic gentleman, as seen by his polite and courteous treatment of even the strange and awkward Tomoko.
* SatelliteLoveInterest: Mostly because his status as a potential love interest is entirely in Tomoko's head. Tomoko has only spoken to him a few times, and outside of being a NiceGuy, not much can be seen of his personality from their exchanges.
* UmbrellaOfTogetherness: He first meets Tomoko when he lends her an umbrella during a rainy day, and she later becomes smitten with him.
* TheUnsmile: While generally an overall NiceGuy, Tomoko's BoyfriendBluff stunt and getting confronted by Kii for "cheating" on Tomoko kind of strains Kosaka's ability to be nice. When he tries to smile off Tomoko's apology, it's shown that he is struggling to.

[[folder:Mako Tanaka]]
A friend of Yuri's who becomes acquainted with Tomoko through their mutual relationship with her.
* TheAtoner: She and Yuri implicitly got into a fight that resulted in the latter not being grouped up with her. While they have made up since then, Mako still feels guilty about it. She similarly feels guilty when she doesn't have lunch with Tomoko, and decides to befriend her to make up for it.
* CloudcuckoolandersMinder: [[spoiler: In Chapter 124, she serves as this trope to ''Yuri'', who out of jealousy inserted herself into Tomoko's meetup with Yuu and Kotomi and made the conversation all about field trip inside stories she shared with Tomoko. Mako had to pull her away from the table and call her out on her behavior before she realized how immaturely she was acting]]
* HorribleJudgeOfCharacter: She's convinced that ''Tomoko'' is a selfless, kind, and misunderstood soul. If only she knew what dark thoughts lurked in that girl's head.
* MistakenForGay: Her often emotional and touchy-feely behavior around Tomoko has convinced the latter that she's a lesbian.
* NiceGirl: Aside from a fight she got into with Yuri (which is implied to be pretty one-sided), she's impeccably sweet.
* NoSenseOfPersonalSpace: The incident in chapter 99 that made Tomoko think that Mako might be a lesbian involved [[spoiler:Mako following Tomoko to the bathroom stall, covering Tomoko's ears so she wouldn't hear her classmates badmouthing her, then holding Tomoko's hands and asking Tomoko to be her friend (with her face very close to Tomoko's) - while they were still in the bathroom stall.]]
* OnlyFriend: For Yuri before Tomoko and Yoshida entered the scene.
* WhatTheHellHero: In Chapter 124, [[spoiler:after noting how Yuri inserted herself into Tomoko's meetup with Yuu and took over the conversation out of jealousy for the closeness the two displayed to one another, Mako takes her friend aside and lambasts her for her behavior, going so far as to say she's acting NotSoDifferent from Minami, whom Yuri ''really'' doesn't like.]]

->'''Voiced by:''' Creator/TomokazuSugita (Japanese), Corey Hartzog (English)

An overweight student in the manga club who Tomoko is partnered with in order to complete a portrait-drawing assignment for her art class. While Tomoko believes that the cute-looking portrait he drew of her meant that he found her attractive, it is later revealed that [[OnlySixFaces he draws all female characters with the same face]].
* AbhorrentAdmirer: Tomoko is immensely grossed out by the idea of him being into her at first. After she sees the picture he drew of her, though, she becomes more keen on it. [[SubvertedTrope Of course, it's later made clear that he has no interest in her at all, and his attraction to her was all in her head]]. Also counts as HypocriticalHumor on Tomoko's part, as she's a huge loser and geek herself who constantly pervs on people who barely know her.
* TheBusCameBack: Makes a surprise reappearance five volumes after his debut as a person checking out books from the library while Komiyama was on duty. Not only does Tomoko still think that he has a thing for her, but Komiyama mistakes Tomoko as having a thing for ''him''. [[spoiler:Even later, in chapter 122, he becomes Tomoko's classmate.]]
* GeekPhysiques: He's fat and a member of the manga club.
* {{Gonk}}: He's fat, has a strange and unattractive face, and acts in an unappealing manner.
* {{Jerkass}}: Downplayed. He's not outwardly hostile, but he's so apathetic that considering the needs of other people is just something he can't be bothered with. For instance, he rushes through his portrait assignment with Tomoko and leaves, not caring at all that she still needed to use him as a reference.
* LastNameBasis: Mostly because Tomoko doesn't know him very well.
* {{Nerd}}: Certainly ''seems'' like one, at least. He's [[GeekPhysiques fat]], wears [[NerdGlasses glasses]] and [[{{Otaku}} is in the manga club]]. Tomoko even guesses that he he has no friends at all just by looking at him. Since we don't actually get to see what his social life is like though, this is entirely an assumption.
* NonStandardCharacterDesign: His lips and nose look nothing like any other character's.
* OnlySixFaces: He draws all of his female characters with the same stock {{Moe}} face. His portrait of Tomoko in this style convinces her that he has a crush on her.
* TheQuietOne: Doesn't say much at all.
* TheStoic: Maintains the same expression throughout all of his screen time.
* TerribleArtist: Played with. He's actually quite good at drawing, but is incapable of giving his characters different-looking faces.

[[folder:Akane Okada]]
->'''Voiced by:''' Ayaka Asai (Japanese), Ashley Miller (English)

A popular girl in Tomoko's class who is friends with Hina.
* ADayInTheLimeLight: She gets a very short 5 page one in Chapter 118, where she grudgingly saves Tomoko from Yoshida, but gives her back once she learns why she Yoshida was angry at her in the first place.
* BullyHunter: Despite her usual indifference to Tomoko, she immediately steps in to defend her from (what appears to be) Yoshida bullying her.
* InnocentlyInsensitive: Generally appears to be well-intentioned in her interactions with Tomoko, but only ever ends up making her more self-conscious when doing so. Even when she ''isn't'' interacting with Tomoko, she still manages to make her feel bad about herself by bringing up her fulfilling teenage life when around her.
* LastNameBasis: Only ever referred to by her last name until chapter 124.
* LovableAlphaBitch: To a degree. She has a large social circle and appears to be quite popular, but also always acts pleasantly towards Tomoko whenever they interact. Despite this, she is generally shown to be disinterested in or even put off by Tomoko, showing that, while friendly, she still isn't exactly clamoring to spend time with unpopular kids.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Yoshifumi_Okada Yoshifumi Okada]].
* OrdinaryHighSchoolStudent: Seemingly an entirely ordinary teenager with a fulfilling school life. Tomoko at one point even refers to her as a "normie".
* PlatonicLifePartners: Kiyota appears to be her best friend, but their relationship seems to be completely platonic, with Okada even teasing Kiyota about his love life.
* SatelliteCharacter: Exists mostly to serve as a "popular kid" for Tomoko to grumble at. This is highlighted multiple times to be entirely the result of Tomoko's ProtagonistCenteredMorality preventing her from seeing her as anything more.
* ThoseTwoGuys: Almost always appears with Kiyota. Strangely, he's totally absent from her focus chapter.
* WhatTheHellHero: She doesn't hesitate to call Yuri out for [[BystanderSyndrome just standing back and passively watching]] what appears to be a bullying incident. Of course, this is before she learns what was really going on.

[[folder:Yoshinori Kiyota]]
->'''Voiced by:''' Kengo Takanashi (Japanese), Creator/BlakeShepard (English)

A popular boy in Tomoko's class who is friends with Hina.
* AdaptationDyeJob: Has brown hair in the anime, while the cover of volume 11 of the manga (published after the anime concluded) shows him with blond hair.
* ButtMonkey: Seems to be something of this within his friend group, as he regularly gets teased for his romantic failings. It's all shown to be good-natured ribbing, though, and he frequently instigates it by making self-deprecating jokes about himself.
* InnocentlyInsensitive: Generally appears to be well-intentioned in his interactions with Tomoko, but only ever ends up making her more self-conscious when doing so. Even when he ''isn't'' interacting with Tomoko, he still manages to make her feel bad about herself by bringing up his fulfilling teenage life when around her.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Ikuhiro_Kiyota Ikuhiro Kiyota]].
* TheOneGuy: While the popular clique ''does'' include multiple guys, they are reserved entirely for group shots. Outside of these instances, Kiyota is the only popular male student we ever see, making all of his close friendships seemingly be with girls.
* OrdinaryHighSchoolStudent: Seemingly an entirely ordinary teenager with a fulfilling school life. Tomoko at one point even refers to him as a "normie".
* PlatonicLifePartners: Okada appears to be his best friend, but their relationship seems to be completely platonic, with Okada even teasing Kiyota about his love life.
* SatelliteCharacter: Exists mostly to serve as a "popular kid" for Tomoko to grumble at. This is highlighted multiple times to be entirely the result of Tomoko's ProtagonistCenteredMorality preventing her from seeing him as anything more.
* ThoseTwoGuys: Almost always appears with Okada.


A nerdy boy who sits next to Tomoko in class.
* ButtMonkey: Tends to get slightly humiliated every time he appears, and Tomoko loves to mock him inside her own InternalMonologue, clearly viewing him as being beneath her.
* CannotTalkToWomen: Becomes very flustered when he's forced to compete in a three-legged race with a cute girl during the school's athletic meet.
* DoubleStandard: When Tomoko is told to wake up after falling asleep in class, everyone goes silent, when he does the same, everyone laughs. Tomoko Lampshades this.
* EeriePaleSkinnedBrunette: He's gangly, pale and has shaggy black hair.
* GeekPhysiques: He's a skinny, scrawny nerd.
* LastNameBasis: Justified, since Tomoko doesn't know or care about him very much.
* {{Nerd}}: Has all of the standard traits of one, at least. He's [[GeekPhysiques rail-thin]], [[OpaqueNerdGlasses wears thick glasses]] and [[CannotTalkToWomen gets anxious around pretty girls]]. Tomoko even calls him one in her thoughts. Like Hatsushiba, though, we see so little of him that this is entirely an assumption.
* NerdsAreVirgins: Tomoko assumes this trope when judging him in her InternalMonologue.
* NoSocialSkills: Is always shown to be visibly nervous whenever he interacts with another person.
* OpaqueNerdGlasses: His glasses completely conceal his eyes, and make his status as an unpopular nerd immediately obvious.
* {{Otaku}}: Tomoko describes him as one, though this is entirely an InformedAbility as we don't get to see enough of him to confirm it.
* SatelliteCharacter: We don't know much about him besides the fact that he's unpopular and sits near Tomoko. This is [[JustifiedTrope justified]] as being the result of Tomoko's disdainful indifference to him.
* SpearCounterpart: Seems to be one to Tomoko, being an awkward EeriePaleSkinnedBrunette {{Otaku}} with poor social skills. Naturally, [[HypocriticalHumor Tomoko overlooks their similarities in order to mock him]].

[[folder:Asuka Katou]]
Tomoko's classmate with an interest in make-up.
* AscendedExtra: Made brief appearances in chapters 71 (sitting next to Tomoko on the train) and 90 before becoming a recurring character. She's also very likely to be Tomoko's classmate who called her home in chapter 58.
* CosmeticCatastrophe: Unwittingly subjects Tomoko to this in chapter 106, if Hina's reaction is anything to go by. Though it's debatable whether Hina was reacting to Katou's incompetence as a beautician or to Tomoko getting a makeover in general.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Shohei_Kato Shōhei Katō]].
* NiceGirl: Shown to be kind and helpful to her classmates, even unpopular ones such as Tomoko or one of Kakinuma's nerdy friends in chapter 120.
* TeamMom: Her eagerness to help out and accommodate her fellow students prompts Tomoko to wonder if Katou thinks of herself as the class mom. Being her usual bitter self, [[DontYouDarePityMe Tomoko tends to find her attempts to be nice patronizing]].

A popular girl in Tomoko's class. Minami is the reason for Yuri's and Mako's falling out before and during the school trip, as she invited Mako to join her group for the trip, which meant that Yuri and Mako could not be in the same group. She takes an interest in Mako in general, and wants her to join her group of friends. On the other hand she does not get along with Yuri, and neither of them tries to befriend the other.
* AlphaBitch: A common fan interpretation of her, and this seems to be how Yuri sees her as well. She did find it funny when Tomoko tripped and fell in chapter 117, and might have badmouthed Tomoko in chapter 99. She also puts a strain on Yuri's and Mako's friendship [[spoiler:and ignored Yuri when seated next to her during the class farewell party in chapter 120 to chat with Mako instead]], but whether she did all that out of malice is unclear.
* CuteLittleFangs: Has an enlarged left fang, which is visible when she's talking. [[spoiler:Tomoko making a quip about it in chapter 117 almost made Yuri [[NotSoStoic burst out laughing]] for the first time.]]
* TheFriendNobodyLikes: Becomes this in her third year of high school, as she gets separated from her old friends and struggles to fit in with established cliques in the new class. It seems that most of the time she ends up (rather awkwardly) tagging along with Akane and Asuka. Notably, during the trip to Disneyland in chapter 125, when her group splits into smaller groups, no one thinks to invite her to join them, forcing her to invite herself into Akane's and Asuka's group.
* HairDecorations: She's always got a pair of matching ornaments in her hair. They're usually triangular in shape, but she occasionally mixes things up.
* LaserGuidedKarma: After splitting Yuri up from her OnlyFriend and leaving her isolated for the field trip, Minami finds herself separated from her own friends in her third year of high school.
* NamedAfterSomebodyFamous: Shares the surname of [[https://en.wikipedia.org/wiki/Masaki_Minami Masaki Minami]].
* VillainOfAnotherStory: For a given value of "[[VillainyFreeVillain villain]]," but she has this vibe. There's some animosity between she and Yuri that's strongly implied, but not outright shown. Tomoko, meanwhile, seldom crosses paths with Minami and the two never interact with one another outside of the very rare derisive comment, which is usually unheard by the receiving party.