Voiced by: Hina Kino
A hyperactive girl from a wealthy family who ended up in the Pastimers Club by being assigned as Olivia's guide. She's rich, athletic, and academically intelligent, but her erratic personality and otaku interests keep her from being popular, giving her a seething resentment toward any girl with any hint of a social life. While smart, she's not very clever and is generally the one who escalates any situation that the girls get into.
- A-Cup Angst: Hanako is really flat, which is passed down from her mother. When measured in Episode 12, Hanako's measurements add up to a AA cup size, which is even smaller than A. Not helping matters is how it is vastly overshadowed by Kasumi's Gag Boobs, who adds fuel to the fire by her constant D-Cup Distress.
- Academic Athlete: Hanako is not only academically good, but she also used to be the ace player of her school's Soft Tennis Club. Ironically, she joined that club not so much out of love for the sport as much as love for boys, and the resulting lack of a social life due to athletic pressures made her quit for good.
- Ain't Too Proud to Beg: She will grovel hysterically if her first proposal is rejected, and may force Kasumi and/or Olivia into doing it with her. It very rarely ever has any effect, however.
- Allergic to Routine: She gets bored rather easily and is prone to falling into bored slumps unless she partakes in activities that give her a sense of fulfillment.
- Alliterative Name: Hanako Honda.
- Always Second Best: Despite her academic aptitude and hard work to top it off, Hanako always ranks second in the class due to one or two less-than-perfect scores, much to her dismay.
- Berserk Button: Any mention or implication whatsoever of someone having a boyfriend will cause Hanako to have a hissy fit. Having big boobs while in her presence invokes a similar reaction.
- Black Bead Eyes: While Hanako does have a "normal" eye design like everyone else, hers often devolve into these whenever she's excited or agitated.
- Brutal Honesty: She has no sense of subtlety. Her idea of carefully confirming Olivia's relation to her otaku brother is asking if she adopted him straight from Akihabara.
- Charles Atlas Superpower: Her ability to train a beetle to pick lock a door, read and possibly do basic arithmetic.
- Cloudcuckoolander: Just because Hanako is the most academically proficient of the trio does not necessarily mean her head is screwed on properly. For example, she thinks she can somehow siphon Kasumi's boobs unto herself before begging the "boob gods" to not take any more boob away from her, after learning she measures as an AA cup bra size.
- Comical Overreacting: When the Pastimers Club is threatened to close, which is her only claim to having a social life, she gets on her hands and knees and hysterically grovels to save it. Failing to secure ¥10,000 (about $100) for the club funds she wanted to use to buy toys and fun trips results in her crying, despite being wealthy enough to easily cover the expenses.
- Comically Missing the Point: When Olivia tells Hanako that a weird dress the latter bought could kill virgins, Hanako somehow thinks it's about a conspiracy to punish them for refusing to do their part in populating the Earth. Furthermore, when Olivia tells her to go to Harajuku to "hunt" virgins, she imagines the place as a Mad Max-type dystopia that the government hides from the public.
- Culture Blind: Hanako doesn't know what shogi really is, and grew up under the false impression that it was a sport where one fires Frickin' Laser Beams from their butt. It's revealed that this explanation was given to her by her family butler Maeda, who can fire laser beams from his butt.
- Cute, but Cacophonic: She may look like a cute middle schooler, but when agitated her voice can become an ear-splitting screech which Olivia at one point even compared to that of a mandrake.
- Ditzy Genius: Has high grades but less common sense than the other members of the trio, which is saying quite a bit.
- Expressive Hair: Hanako's long pigtails become more animated when she is in an erratic mood.
- Foolish Sibling, Responsible Sibling: The Foolish to Kentaro's Responsible. The latter has a really dim opinion on her due to her questionable intellect and weird antics. Up until they finally met, he believed Hanako made up Kasumi and Olivia just to sound cool.
- Genki Girl: Hanako is the most hyperactive of the trio, and often leads the way regarding the club's antics.
- Green-Eyed Monster: Her hatred for popular girls with boyfriends is very clearly shown to stem from her jealousy over having no social life. Back when she was in the Soft Tennis Club, her Signature Move was even her "Green-Eyed Serve".
- Guile Hero: "Hero" is a bit of a stretch, but Hanako usually resorts to trickery in order to win a dispute. She almost never succeeds in this venture.
- Hartman Hips: Hanako doesn't have much up there, and has a very narrow waist, but is actually quite ample down below, if the sugoroku segment is any indication. Even during normal situations, she is usually illustrated with much larger hips and butt compared to Kasumi or Olivia.
- Heroic Comedic Sociopath: She enjoys devising games where she can humiliate her clubmates, such as a game of "sugoroku" which imposes embarrassing scenarios as dares, as well as a guessing game she rigged by most of her submitted words being "poop". Both times, it bites her in the ass, the latter figuratively, when she is the only one who gets one of those "poop" tags, the former literally, as she gets spanked as a dare.
- Hidden Depths: Despite looking like a hyperactive simpleton, Hanako is actually the smartest member of the Pastimers Club, as well as being rich and athletic. It's implied that the only thing keeping her from the popular girl she wants to be is her own erratic personality.
- I Just Want to Be Special: Hanako is especially ordinary and lives a generally unremarkable school life, which she is painfully aware of and strongly resents.
- Inelegant Blubbering: Whenever she is humiliated, Hanako is frequently reduced to a tearful wreck, such as after enduring a humiliation game of sugoroku with her clubmates and after easily losing to Kasumi at an arm wrestling match.
- Ink-Suit Actor: Unintentional, as the manga came out first, but Hina Kino seems to resemble Hanako in more than just looks. She even shares Hanako's terrible luck at games and often manages to lose spectacularly without the other person even trying, so Hina Kino as Hanako is just her being herself in costume, basically.
- Innocently Insensitive: Her humor and words of encouragement to others can often come across as insulting or condescending.
- Jerk with a Heart of Gold: She tends to be the biggest jerk out of the three main girls, and she can be especially mean when she's jealous or losing at something, but when it comes down to it she genuinely appreciates her friendship with Kasumi and Olivia.
- Large Ham: She's prone to having over the top emotional outbursts, usually over very mundane or silly things.
- Living Lie Detector: Hanako can detect very specific lies, namely when someone popular is faking their demeanor. Ironically, she is also Super Gullible in the face of Olivia's boldfaced lies.
- Modesty Shorts: Hanako wears sports shorts underneath her skirt, as shown when the trio's Tsugumi-skirt-peeking shenanigans went wrong.
- Nightmare Face: Like all the other characters, she has one for comedic purposes, but she displays it more often than Kasumi and Olivia.
- Ojou: Her family is rich enough to own a mansion and retain a butler, and she's shown to be able to buy anything she desires. Other than that, though, she doesn't act like a rich person at all. Even her friends believe that she thinks like a poor person.
- Rich in Dollars, Poor in Sense: For all her wealth, Hanako has no sense of fashion; specifically, she has no idea what constitutes acceptable fashion, and believes Harajuku style to be the be-all-end-all of fancy clothing. She then takes this Up to Eleven with the gaudy outfit she wears to the group study at a local cafe. Admittedly, she bought it under the assumption that either Olivia or Kasumi liked it, which neither did.
- The Scrooge: Despite her wealth, not only is she modest, but is also quite the cheapskate. She offers to buy an extremely rare and valuable Blue-Eyed Delinquent card from Olivia for ¥60, and in Episode 7, after proclaiming that she can't be bought, Tsugumi bribes her with cheap nail polish from the dollar store.
- Smarter Than You Look: Kasumi is shocked to hear that Hanako made some "careless mistakes" and "only" got a 92 on her English test:Kasumi: "Wait, Hanako's actually smart?"
- Sore Loser: Hanako really hates being beaten at something, be they test scores, mobile games, romantic relationships, or cup sizes.
- Sour Grapes: For all her habit of Slut-Shaming any girl with a love life, it's pretty obvious she is bitter that she has yet to find her significant other.
- Strong Family Resemblance: The Honda siblings both have Tareme Eyes, and really wide foreheads covered by loose short bangs. Additionally, Hanako inherits her washboard chest from her mother.
- Suicide as Comedy: When Kasumi comments on how she got her large breasts through genetics, Hanako tries to drown herself in the club's kiddie pool, claiming she is going to reincarnate from a buxom woman's womb because her mother happens to also be a washboard.
- Super Gullible: Hanako almost always falls for Olivia's various lies, at least initially.
- Tareme Eyes: Subverted. Normally, Hanako's eyes seem droopy, slow and peaceful, but her personality is anything but.
- Troll: Hanako is prone to playing pranks on Kasumi and Olivia simply to amuse herself. An example is when she said nothing when Olivia, who she knows cannot speak English, was chosen for the English speech contest because she thinks it's funny. More often than not, this backfires on her, such as when she rigged a word guessing game in order to make Kasumi and Olivia say "poop", only to be forced to say the word herself.
Voiced by: Konomi Kohara
A straight-laced, studious girl who is terrible at English. Her sister constantly beating her at games in order to boss her around has led to her hating games, but all the practice has also made her intensely good at them. She forms the Pastimers Club with Olivia and Hanako in hopes of Olivia teaching her English, not knowing that Olivia is just as bad at the subject as she is.
- Abnormal Limb Rotation Range: Kasumi seems capable of bending her body in absurd ways, like bending her thumb a good 90 degrees sideways in a game of thumb war, or folding sharply backwards at the waist while playing faux sumo with Hanako:Hanako: "[Kasumi's] doing her Chinese contortionist shit again."
- Ambiguously Gay: She becomes absolutely flustered and flabbergasted when Tsugumi (assuming they are a girl) kissed her out of the blue.
- Awesome by Analysis: Subverted. Kasumi is good at physics, so she thinks she can succeed at tennis by anticipating the trajectory of the ball. Unfortunately, her body cannot keep up and she fails miserably.
- Beware the Nice Ones: Hanako and Olivia are always caught off-guard by her sudden change in demeanor when Kasumi goes from her usual demure self to her angry or competitive moods.
- Buxom Is Better: She's noticeably shapelier than Hanako, causing A-Cup Angst on her. Suspiciously, lecherous babies also seem to prefer Kasumi's bust.
- Catapult Nightmare: Jolts up screaming after having a nightmare where Tsugumi revealed their genitals to her.
- Charles Atlas Superpower: The only possible reason why she is so flexible.
- D-Cup Distress: Kasumi is not exactly proud of her shapely figure; if anything, she frequently laments that nothing good has ever come of it—she has a hard time buying clothes of her size, and the shirt she makes for her Home Economics homework exposes her cleavage.
- Does Not Like Men: Kasumi is an extreme androphobe, having the assumption that men would fire Frickin' Laser Beams from their groin when turned on. When she meets Maeda for the first time, she reacts to him suddenly appearing behind Hanako by slashing at him with an umbrella. Given that she's not fazed by Hanako's younger brother Kentarou and (possibly) Tsugumi, however, it may have also have to do with being distrustful around sketchy men, such as Maeda and Olivia's otaku brother.
- The Dreaded: Kasumi is quite threatening towards Olivia and Hanako in the first chapters. While she does mellow down afterwards, she is still quite scary when she gets competitive.
- Dreadful Musician: The OVA shows just how horrible her singing is.
- Freudian Excuse: Kasumi's older sister would always beat her at various games and force her to do things as punishment. As a result, Kasumi generally dislikes games, but becomes fiercely competitive if she must partake.
- Gag Boobs: Played with. While Kasumi undoubtedly has the largest breasts among the Pastimers Club, they aren't all that huge normally, let alone the subject of much discussion, unless they are brought up in conjunction with Hanako's A-Cup Angst, whereupon they seem to quadruple in size.
- Ink-Suit Actor: An unintentional case like Hanako, but just put a pair of glasses on Konomi Kohara and you'd get a pretty damn close approximation of a live-action Kasumi.
- Irony: Despite her extreme fear of men, one of Kasumi's hidden passions is writing yaoi.
- Male Gaze: Kasumi is the subject of this when Hanako stares at her breasts.
- Meganekko: She wears a pair of glasses.
- Neat Freak: Episode 8 reveals that she cleans her desk with alcohol, so much so that Olivia can't find a single bacteria on it through her game. After learning that Hanako's writing mat has fecal bacteria on it, Kasumi offers to sterilize everything that she owns.
- Nice Girl: Played with. She is the most agreeable, bashful and kind of the Pastimers Club, and the only one that would rather keep to herself instead of forcing her views on others. When she's fired up, though, she could bite someone's head off given the chance. As such, Olivia and Hanako are understandably wary of her.
- Nightmare Face: Like all the other characters, she has one for comedic purposes.
- Opaque Lenses: Appears whenever she is shocked.
- Scary Shiny Glasses: Whenever she is emitting her intimidating aura.
- Serious Business: Kasumi treats any type of game as this, much to the other Pastimers' terror.
- Ship Tease: With Tsugumi.
- Shrinking Violet: She is normally rather shy and withdrawn in most situations, though she can change her demeanor rapidly if annoyed or angered.
- Sickening "Crunch!": Happens every time Kasumi demonstrates her Chinese contortionist shit to no ill effects.
- The Straight Man: She generally acts as this to her two friends, but sometimes she can act just as goofy if not goofier than them.
- Stronger Than They Look: Kasumi has a lot more upper-body strength than her introverted personality would suggest, as she effortlessly beats her friends in physical activities.
- Suicide as Comedy: Hanako discovering her raunchy boy-on-boy fan fictions results in Kasumi trying to strangle herself.
- Thinks Like a Romance Novel: Kasumi hates men, but is able to be coaxed into tolerating them if she twists her perception into thinking of them in terms of her BL fictions. She can only put up with Olivia's older brother by imagining him being involved with the school's security guard.
- Yaoi Fangirl: Hanako discovers Kasumi writing smutty yaoi novels, to the latter's great embarrassment. When Hanako questions why Kasumi likes BL despite being an androphobe, Kasumi says that 2-D stuff is fine since they aren't real men and they don't hit on women.
- You Fight Like a Cow: She's perfectly willing to trash talk Hanako just to win a demonstration round of sumo slap.
Voiced by: Rika Nagae
A foreign exchange student from America who is excited to learn all about Japan... at least, that's what she tells people. In reality, while her parents are foreigners, she was born and raised in Japan and doesn't know a word of English, but she really wants to learn about Japanese pastimes and so she forms the Pastimers Club with Kasumi and Hanako on the promise of her teaching Kasumi English. She tends to be the most airheaded and sentimental member of the club, and she's often the instigator of the club's shenanigans.
- Accent Upon The Wrong Syllable: Her "bad" Japanese is spoken like this in the anime.
- Artistic License Biology: Played for Laughs: when Hanako picked up Olivia's phone, the Bacteri Go mobile game points out that Olivia is riddled with bacteria on her armpits. In reality, while body odor can be caused by bacterial accumulation, it's pointed out that Olivia's body odor is due to the fact that she has active apocrine sweat glands as a person of Caucasian descent, a problem that has very little to do with bacteria as a whole. All in all, the joke further implies that Olivia, apart from the body odor, is untidy.
- Bad "Bad Acting": Olivia starts off speaking with a terrible American accent in order to hide the fact that she can't actually speak English. She mostly drops the act after the first episode, but it still pops up whenever she's trying to tell a lie.
- Big Brother Worship: Olivia has a glowing opinion of her older brother despite him being an overweight, amazingly embarrassing and shameless Otaku. It does help that he was academically excellent and is quite the charmer on the phone.
- Book Dumb: She is repeatedly shown to be needing remedial classes and Hanako and Kasumi unanimously agree Olivia is the least studious amongst them.
- But Not Too Foreign: Of the ethnic/cultural dissonance variant. While she is of foreign ethnicity (though it isn't clear where exactly her family is from), she was born and raised in Japan.
- Character Tics: Olivia tends to pause and divert her eyes from someone when she's about to lie.
- Comical Overreacting: Her reaction to Kasumi and Hanako suggesting that she should study in order to improve her English is to throw a full-blown tantrum.
- Consummate Liar: Played with in that Olivia very frequently and easily can pull lies over on Hanako, but Kasumi generally sees through them.
- Different in Every Episode: Her hair style is different every episode.
- Digging Yourself Deeper: Olivia does this when she tries to maintain the illusion that she's a foreigner when she agrees to teach Kasumi English.
- Dumb Blonde: She isn't studious like Hanako and Kasumi, who is only bad in English, and is consistently the most scatterbrained member of the Pastimers Club.
- Fauxreigner: Zigzagged. While Olivia is of genuine foreign descent, she was born and raised in Japan and thus can't speak a word of proper English. She is in fact worse at it than Kasumi, whose best score in the English exam is one.
- Funny Foreigner: Her various foreign games and family activities originating from her parents' country are labeled as bizarre by Hanako. This is in spite of the fact Hanako herself generally behaves more strangely than Olivia in day-to-day life.
- Girly Girl with a Tomboy Streak: Despite being the most outwardly feminine of the Pastimers Club, she has a passionate love of sumo wresting and is distraught when she learns that only men can become sumo wrestlers.
- Gratuitous English: Her attempts at speaking actual English comes across as this.
- The Heart: Olivia is generally the most empathetic and understanding amongst the girls, and is often the most vocally supportive of the club's activities. Kasumi imagining the Pastimers Club without Olivia is a nightmarish situation where she is trapped with only a bitter Hanako who has no one to entertain her.
- Hidden Depths: Despite her goofy and air-headed mannerisms, Olivia actually managed to score 90 on the Japanese grammar test during the entrance exams.
- I Just Want to Have Friends: She seems to really appreciate the friendship of her fellow Pastimers, especially when they continue to be her friend even after they find out her accent isn't real.
- Irony: Olivia is constantly misunderstood to be good at English due to her looks and facade, but she doesn't speak a word of it.
- Lazy Bum: Her poor academics is a result of genuine laziness and aversion to studying.
- Loophole Abuse: She'll occasionally resort to this in order to win games. For example, when playing shoe launcher, she utilizes a swing for momentum, reasoning that no one said she couldn't do so.
- Modesty Shorts: Like Hanako, Olivia wears gym shorts underneath her skirt that could be seen during the same scene where Hanako revealed hers.
- Nightmare Face: Like all the other characters, she has one for comedic purposes.
- Only One Name: Her last name is never revealed.
- Only Sane Man: Olivia is often the only one with her head screwed on properly, and is more often than not completely flabbergasted by whatever antics Hanako and Kasumi get into. Apart from her trying to be a foreigner, she also doesn't have any major "issue", unlike her two friends.
- Ooh, Me Accent's Slipping: When in stressed situations or not paying attention, she can sometimes forget to speak in her fake accent and actually mixes different Japanese accents.
- Phenotype Stereotype: Blonde-haired, blue-eyed Olivia fits the Japanese stereotype of what an American "should" look like to a T, which is why all the other characters so readily believe she's fluent in English and poor in Japanese.
- Signature Scent: She's noted by others to have terrible body odor. She is oblivious to it at first, but when she catches on, she becomes self-conscious about it.
- Situational Sociability: Olivia is actually incredibly shy and awkward, but is able to express herself better by speaking in broken accents. She eventually becomes perfectly comfortable with Hanako and Kasumi, but still regularly falls back on her fake dialects with strangers, both consciously and unconsciously.
- Truth in Television: When Hanako smells her armpit, she says that Olivia has apocrine sweat glands. East Asians have very few apocrine sweat glands compared to Caucasians and Africans, and thus have little to no body odor. Therefore, it makes sense that Olivia, a Caucasian, would have bad body odor compared to the Japanese Hanako and Kasumi. Also, as with most people with bad body odor, she doesn't quite notice her own funk, and also happens to be at the age where peers of her ethnicity (13-14 years old) start using deodorant. The problem is that not only does Olivia have few, if any, fellow teenage Caucasians around to let her know, but that she also lives in a society where simply pointing out her personal hygiene (or lack thereof) can be considered impolite.
- Verbal Tic: Tends to end her sentences with a very pronounced "desu" when using her fake accent.
- What the Hell Is That Accent?: When she's scared, she'll start talking in random dialects.
- Wild Card Excuse: In order to get out of teaching other people English, Olivia says this. It is even lampshaded by the narrator:Olivia: Conversational English and Examination English are quite different.
Schoolmates and Teachers
Student Council President
Voiced by: Honoka Inoue
The Student Council President of the Pastimers Club's middle school. Her meek and timid appearance forms a remarkable contrast with the outright cruel things she tends to say.
- Beat Them at Their Own Game: She curb-stomps the main characters, even the over-competitive Kasumi, in Othello.
- Bitch in Sheep's Clothing: While she looks meek and timid, she often says incredibly rude and abrasive things, possibly accidentally.
- Brutal Honesty: Despite meaning well, the president is terribly blunt when it comes to expressing her opinions, which horrifies whomever she is speaking to; what makes it even worse is the fact that she doesn't quite realize how harsh she sounds. She also is very bad at concealing her true feelings, as her attempts at subtlety often fail completely.
- Cloudcuckoolander: Has shades of this despite her overall normal disposition. She seems to be this the most whenever the Pastimers Club is involved:
- Her reaction towards Olivia crawling on all fours away from her is to burst into a mad dash and laughing maniacally the whole way.
- When it is her turn to visit the neighboring all-boys school, she sprints at full speed across the hall while Thinking Out Loud about it.
- Comically Missing the Point: When Olivia is forced to crawl through the halls on all fours, the Student Council President thinks she's trying to outrace her and breaks into a sprint after Olivia, laughing maniacally the whole way.
- The Dreaded: The Pastimers Club trio are terrified of her due to how unavoidable she is whenever they try to get anything done at all. Her tendency of saying cruel things while wearing an absolutely pants-wetting expression doesn't help matters.
- Everybody Calls Him "Barkeep": Her real name hasn't been revealed.
- Evil Laugh: She pulls a pretty great one while chasing Olivia through the hall.
- Face of a Thug: Her demeanor and expressions become downright horrifying whenever she tries to get her intentions across, despite her supposedly peaceful nature.
- Hidden Depths: She is a much, much better person deep inside (or at least she thinks she is), but there's a thick filter between her brain and her mouth. She seems largely unaware of this, or is in great denial about it.
- I Did What I Had to Do: As she argues, she does her Student Council duties because she has to, and not because she particularly likes it. Goes to show why she doesn't beat around the bush when in official duties, and comes off as completely ruthless as a result, as she'd rather be done with it rather than dwell in ceremony.
- I Just Want to Be Special: As she herself admits, she only ran as student council president so she could be in the limelight. While she did get the position, she laments the fact that the job isn't as exciting as she thought.
- I Just Want to Have Friends: If her words are any indication, she's rather lonely with very few friends due to her boring job, Shrinking Violet personality, Brutal Honesty and (unintentional) Face of a Thug. Most notably, despite beating the Pastimers Club soundly in a game of Othello, while also scaring the crap out of them in the process, she genuinely cherishes the time spent with them and wonders if they would drop by and hangout sometimes.
- Implacable Man: She's relentlessly efficient at her student council duties, and even when she's trying to be nice, she comes across as cornering and unbudging on her decisions.
- Obstructive Bureaucrat: She has a knack for shooting down the Pastimers' proposals whenever they try to ask for approval.
- Opaque Lenses: Her glasses become these when she's surprised or speechless.
- Open Secret: Her desire to visit the adjacent all-boys school is known to everyone, despite her wanting to keep it a secret. This is due to her yelling it out loud as she runs down the hallway.
- Scary Shiny Glasses: Usually accompanies her terror-inducing bouts of Brutal Honesty.
- The Un-Smile: Smile she tries. Smile she fails. Horror ensues.
Student Council Vice-President
Voiced by: Mai Kanazawa
The Student Council President's Number Two, first seen in a flashback in Episode 2 and fully introduced in Episode 11. However, she is hardly ever at the office.
- Bitch in Sheep's Clothing: While the VP looks and behaves like a cheerful and bubbly girl in the presence of boys, she's actually very mean, vain, and self-centered. Furthermore, her monologues reveals that she has utter contempt towards many of her peers. She's only interested in handsome men, often dating many at once behind their backs, and is quite shameless about the fact.
- Exotic Eye Designs: She has star-shaped pupils whenever she's dolled up as a Gyaru Girl. These are just contacts, though, since she has normal pupils whenever she has to take her makeup off.
- Everybody Calls Him "Barkeep": Similar to the President, her real name hasn't been revealed.
- Genki Girl: The Vice-President is always brimming with energy, unlike her meek superior.
- Gyaru Girl: The way she dolls herself up and conducts herself whenever there's no teachers around. She's actually quite plain-looking, and was remarked to be as plain as the President herself when she first got elected, until a makeover from a male student during her first visit to a neighboring all-boys' school made her who she is now.
- The Makeover: She was given a Gyaru Girl makeover during her first visit to the all-boys school by an effeminate male student who couldn't tolerate how meek and dull she actually looks. This also greatly boosted her confidence and gave her personality a 180 degree flip to the point that the Student Council President didn't recognize her when she returned.
- Really Gets Around: She's secretly dating all six members of the neighboring all-boys school's own Student Council. This apparently leads to the worst bloodshed in the school's history. However, that's a story for another time.
Voiced by: Mai Kanazawa
The sole remaining member of the Supernatural Phenomena Science Club. She looks terrifying, but she's earnest in her love of the occult and is a very nice person in general.
- Agent Scully: When Olivia asks why she hasn't tried using magic to heal Agrippa, Oka admits that she doesn't actually believe that that stuff works.
- The Bus Came Back: Oka makes a reappearance along with Agrippa in Episode 11, after being absent since Episode 5.
- Creepy Loner Girl: An extremely creepy girl and the last remaining member in the Supernatural Phenomena Science Club, she's generally by herself despite her nice personality.
- Creepy Monotone: Oka speaks like this all the time.
- Dark Is Not Evil: She looks terrifying and has an active interest in things like hauntings and voodoo magic, but she's actually very nice. She genuinely enjoys hanging out with the Pastimers Club and was absolutely heartbroken when she learned that her clubmate Agrippa had told her that she was being teleported in order to hide the fact that she was sick and going to the hospital.
- Meaningful Name: The Japanese ordering of her name is one syllable away from sounding similar to "occult".
- Nice Girl: She's a sweetheart, but her creep factor is amped up to eleven.
- The Un-Smile: Hers is harrowing enough that it gives even the Student Council President a run for her money.
Aguri "Agrippa" Mato
Voiced by: Megumi Toda
Oka's friend and fellow Supernatural Phenomena Science clubmate. She was on leave at the start of the series due to an unspecified illness, while telling Oka she was teleported away to ease her worries.
- The Bus Came Back: Returns in Episode 11 along with Oka.
- Chuunibyou: Aside from fashioning herself an alias that she uses widely, Agrippa also talks about completing the Fifth Pentacle of the Sun and tells Oka that if she disappears suddenly, she probably used it to teleport.
- Genki Girl: Agrippa is a lot more energetic and enthusiastic than her friend.
- It Runs in the Family: In a flashback, she's shown getting her "secret ingredient" from her grandmother, who is dressed in her own witch outfit and just as deep in the occult:Grandma: "I'll be waiting at Walpurgis Night."
- Nice Girl: Agrippa appears as an overall pleasant person to be around, and if their interactions are any indication, is Oka's only friend until the latter met the Pastimers Club.
- Nightmare Fetishist: While Oka proposes a witch hat-and-broom design for their cultural festival bake sale, Agrippa prefers to create cookies in the shape of rats slamming headfirst into blocks of concrete.
- Only Known by Their Nickname: Inverted. Most of the school's staff know Agrippa's real name, just not her alias.
- Pain to the Ass: The real reason why Agrippa had to take a leave of absence was due to her worsening hemorrhoid.
- Tareme Eyes: Her eyes are always droopy, which suits her Nice Girl personality quite well.
- Theme Naming: Her alias may be taken from Heinrich Cornelius Agrippa, German theologian and prolific writer of books on the occult and ritual magic.
- The Un-Smile: Hers is demonic-looking, just like Oka's.
Voiced by: Aoi Yuuki
A quiet "girl" known to the Pastimers as the cutest in the school. This perception naturally changes when Olivia overhears Tsugumi revealing to a suitor that "she" has a penis. Regardless of whether Tsugumi was telling the truth that night, Tsugumi's calculating and ruthless, easily manipulating the Pastimers.
- Ambiguous Gender: Whether Tsugumi is actually a boy or a girl is never made clear, as nobody has ever been able to provide confirmation. To make matters worse, there are various self-admitted lies, Red Herrings and contradictory statements coming from every direction, making it all the more confusing.
- Aroused by Their Voice: The mere sound of Tsugumi's voice is enough to make Kasumi all fidgety and weak.
- Bokukko: Tsugumi frequently addresses themselves in masculine pronouns, though it wasn't until Olivia brought up suspicions that Tsumugi may be a boy that it became noticeable.
- Manipulative Bastard: They can easily outmaneuver the Pastimers Club when they try and confirm their gender. Later on, they bribe them into stealing the Banana Papers containing records of the Club's (specifically, Hanako's) shenanigans. Once Tsugumi gets their hands on it, they decide to use the information as future leverage over the Club.
- Non-Standard Character Design: In the anime, they're colored a shade lighter than all the other characters, as if their character is slightly illuminated.
- Ship Tease: Seems to get a lot of this with Kasumi, culminating in kissing her out of the blue.
- Stronger Than They Look: Tsugumi easily defeats all three Pastimers in an offscreen arm wrestling match in the OVA.
- Wholesome Crossdresser: Feminine and beautiful enough to fool even "her" boyfriend and the entire school, assuming Tsugumi really is a boy.
Voiced by: Shuu Uchida
The best English speaker in the class after Olivia. She was switched in to replace the latter in an English-speaking contest to cover for her horrendous actual English.
- Ambiguously Gay: If her expressions are any indication, Fujiwara starts having certain feelings for Kasumi after receiving a kabe-don from her. She even invites Kasumi out on a date in exchange for keeping Olivia's terrible English a secret:Shock...Suspense...I might be opening a new door.
- Big Ol' Eyebrows: Comes as part of her Noh mask-like face.
- Creepy Monotone: Imagine her and Oka having a chat.
- Dull Surprise: She hardly ever emotes at all, and the fact that her face resembles a Noh mask doesn't help.
- Early-Bird Cameo: Appeared briefly during Episode 9 before being formally introduced in Episode 10.
- Foil: To Olivia. Both featured very stereotypical visual traits of their heritage, and people expect them to be experts at said culture's language while it's the opposite. Unlike the foreign-looking Olivia who is better at Japanese than English, Fujiwara is an expert in English and admittedly sucks at Japanese literature. It doesn't last very long, however.
- Gratuitous English: Fujiwara peppers her (predominantly) Japanese speech with occasional English words. Sometimes multiple times per sentence.
- Despite acing the English speaking test, Fujiwara is admittedly terrible at Japanese classic literature.
- Adding to the previous point, she's terrible at said literature, in spite of the fact that she looks like she stepped out of an Ukiyo-e print.
- Leitmotif: A mangled rendition of "The Star-Spangled Banner" on recorder plays everytime she appears onscreen.
- Non-Standard Character Design: Her face resembles a Noh mask with very stiff expressions.
- Ooh, Me Accent's Slipping: Meta example. Shuu Uchida lived in Australia for 17 years, and as a result had developed sort of an Aussie accent to her English. The most notable bleeds are "no more [classical literature]" and "no problem", which came across as "nar mar" and "nar prarblem".
- Only One Name: Her given name is never revealed, since everybody is content with addressing her by her surname.
- Surprisingly Good English: Fujiwara tends to insert English words into her speech and inner monologue. That being said, hers is actually very good for a Japanese speaker, though always spoken in a dull monotone with emphasis sometimes being placed on the wrong syllable. Notably, she's the only character to refer to English as such instead of the common eigo that everyone else uses. This is justified in that her voice actress, Shuu Uchida, was born and raised in Australia.
- Traumatic Superpower Awakening: Played for Laughs. Her latent aptitude for classic literature is awoken after Tsugumi snatches Kasumi away from her.
Shogi Club President
Voiced by: Ryoko Maekawa
The president of the Shogi Club, who tried to take over the Pastimers' club room for their own use.
- The Bus Came Back: After her disastrous fall and injury, the President finally returns in Episode 12 of the anime.
- Everybody Calls Him "Barkeep": The President's real name hasn't been revealed.
- Eyepatch of Power: The extent of her injuries results in her having to wear a patch over her right eye.
- Sore Loser: The President is an incredibly sore loser, perhaps second only to Hanako. Despite technically coming out the winner in their shoe tossing contest, her getting injured basically makes the Club lose by default, which remains a sore spot for her that she'll ruthlessly avenge whenever possible. Like, say, in a mobile battle royale app.
- Unsportsmanlike Gloating: As she destroys the main trio in the battle royale game, the President repeatedly sends text messages to gloat at them.
Voiced by: Ryoko Maekawa
The English teacher at the girls' middle school who gets roped into becoming the advisor for the Pastimers Club. Her nervousness around boys and surrounding herself with girls all her life left her with absolutely zero dating experience as an adult, and now she desperately wants to get married.
- Big Ol' Eyebrows: Chisato sports a huge pair of caterpillar eyebrows on her forehead. As they are drawn as immensely dense series of lines, it is safe to assume they are rather bushy.
- Black Bead Eyes: Sensei's eyes have no whites at all.
- Catch Phrase: She'll always say "Sorry I'm late, everyone!" whenever she enters the club room.
- Cat Smile: Her mouth looks like this on occasion.
- Christmas Cake: She has a huge complex over not being married yet (especially considering three-fifths of her female friends during high school are already married), and at one point notes that she's older than her mom was when she gave birth to her. A Running Gag consists on her having Felix Mendelssohn's Wedding March as her phone ring tone, further showing how fixated she is on the issue.
- Closet Geek: She's implied to be a bit of an Otaku, since in Episode 4 she makes a reference to Tokyo Big Sight, the convention center where Comiket is held.
- Does Not Like Men: She had a fear of men throughout her life, leading her to only stick to female friends and to get a job at an all-girls school. Now she laments that this kept her from having any romantic experience whatsoever.
- Engrish: Downplayed. While her grammar is impressive, her speech is noticeably slurry and accented, though her pronunciation is still leagues above that of a typical Japanese native, befitting her position as an English teacher.
- Forehead of Doom: Owing to her very short bangs that she cuts for herself.
- Meekness Is Weakness: She's a huge pushover, and a little too kind for her own good. It's also shown that she's physically weak, as Hanako, Kasumi and Olivia can easily overpower her in arm wrestling.
- Nice Girl: She is one of the sweetest and most innocent characters in the series, to the point of leaning on being The Ingenue.
- Press-Ganged: The Pastimers pretty much shanghaiied her into becoming their advisor. By the time she realized the fact, she's already in far too deep to turn them down.
- Sensei-chan: She's a sweet, kind teacher who's also a pushover, has a huge Christmas Cake complex, and still hasn't grown out of her love for romantic shoujo manga. The Pastimers Club like her a lot, but at the same time they don't have much respect for her as a teacher since they're quick to bring up that she's still single.
- The Talk: Hanako and Olivia don't understand how babies are made so Chisato tries to explain using dolls, but only succeeds in confusing them even further.
- Thinks Like a Romance Novel: To be precise, like a shoujo manga. She never grew out of those, even referring to Please Save My Earth as her "bible", and she says that her type include handsome engineers from the moon.
Voiced by: Mitsuki Saiga
She is the teacher in charge of PE and morals at the school where the Pastimers attend.
- Comically Missing the Point: Mistakes Olivia and Kasumi's makeup failure on Hanako's face for the latter being physically assaulted by them. She also mistook Kasumi's powder puff for an ice cream mochi.
- The Dreaded: As she is the head of public morals of the school, Takayanagi has developed a reputation for confiscating any and all items she considers to be contraband from the students, ranging from makeup to manga.
- Gonk: Takayanagi has a very muscular, almost Herculean build for a woman of her age. In fact, her features are more masculine than most male characters.
- Lady Looks Like a Dude: To an extreme. She is the manliest character at school and in the series at large, despite being explicitly a woman.
- One of the Guys: She's apparently so masculine she's unfamiliar with typical female accessories such as makeup kits.
- Strong Family Resemblance: She has an equally-masculine younger sister who is the captain of the school's swim team.
Voiced by: Yasunori Masutani
The Japanese language teacher who is often the victim of his students' mischief.
- Butt-Monkey: He is often the go-to teacher for when his students require a teacher for their pranks or antics. He would play along with them sometimes, but this usually ends up Gone Horribly Right.
- Cloudcuckoolander: He was so engrossed playing detective following the events of Episode 1 that he went around the entire school doing it and ended up suffering cyanide poisoning from it.
- Descent into Addiction: Ever since taste-testing cookies made by the Supernatural Phenomena Science Club doused with a magic potion, he's gone into a zombified frenzy craving for more cookies over the night, and since then would be triggered into a frenzy over the sight of any cookie. The narration had even called him the true Cookie Monster.
- Disappointed in You: After he manages to prove that the liquid seeping out from under the door is water, not Olivia's urine, he calmly says that he's saddened that the girls lied to him. He changes his tune when they confess that it's water.
- Irony: He has been so proud of his Detective Conan investigation moment in Episode 1 that it has been said he went around the school taste-testing whatever suspicious liquids he finds off the floor... and somehow ends up ingesting potassium cyanide, which landed him in hospital for a few days.
- Nice Guy: Is always willing to help and support his students, even though this gets him into various degrees of trouble.
- Punny Name: His name is pronounced similarly to the Japanese word for "calamity", though written with different characters. Fitting for him due to the amount of predicaments he gets himself into.
- Reused Character Design: An identical character to him appeared in Rin Suzukawa's previous work, Little Chaos, but as a grade school teacher instead.
- Running Gag: His biggest disasters so far are all from doing taste-testings:
- He gets hospitalized from cyanide poisoning due to playing detective all around school by tasting every suspicious liquid he finds on the floor.
- He becomes a literal Cookie Monster ever since tasting potion-laced cookies from the Supernatural Phenomena Science Club.
Voiced by: Ryotaro Okiayu
Hanako's family butler who has a habit of appearing behind Hanako out of nowhere. When aliens probed him and left a laser in his butt, he thought his life ruined until Hanako's grandfather gave him a second chance at life. Thus, Maeda is intensely loyal to Hanako's family, including Hanako herself, which creeps her out a bit.
- Alien Abduction: He was abducted by aliens before his fifth attempt at passing his college final, where he had an alien Wave-Motion Gun shoved into his rectum.
- Amazingly Embarrassing Parents: Butler in this case, as Hanako tends to find Maeda's Cloudcuckoolander personality and ass laser to be cringeworthy.
- Blessed with Suck: His butt laser led to him being unable to hold down a job because he would destroy his employers' toilets every time he used the bathroom.
- Butlerspace: He always comes into the scene by appearing suddenly behind Hanako, often right after she mentions him. According to Maeda himself, he is always by Hanako's side or rather, behind her seat, only very carefully hidden so that nobody notice him.
- Cloudcuckoolander: He never seems to express shame or hesitation in the many eccentric and bizarre feats he will perform in Hanako's name. He has also come to accept his anal laser and the aliens that gave it to him as facts of life.
- The Friend Nobody Likes: He's always around to support Hanako, but everyone, even Hanako, finds him off-putting and bizarre.
- Jump Scare: Maeda has a nasty tendency to pop right out of nowhere when Hanako so much as mentions his name. Every. Single. Time.
- Know-Nothing Know-It-All: Downplayed, but the reason why Hanako was convinced that shogi was a game that involves firing lasers out of your butt is because of him; when Hanako asked him how shogi worked when she was little, he didn't actually know the rules of the game but also didn't want to disappoint her by admitting he didn't know something. Thus, he gave her the first explanation that came to mind.
- Nice Guy: Always willing to lend a helping had, even if it's not needed or asked of him.
- Undying Loyalty: Hanako's grandfather gave him a new lease on life by teaching him to control his butt laser, and as a result serves his family unquestioningly.
- Wave-Motion Gun: The weapon stashed into his ass is a scaled-down version, being capable of blasting through anything, be they cotton trousers, metal doors, ceramic toilets, and brick houses, but strangely not his butt itself. To make matters worse, Maeda cannot fully control when and where he will blast his laser despite his training, so anything standing behind him is at a constant risk of being zapped as it tends to go off at very random moments, though fortunately the beam's width is rather narrow and condensed, so there's (usually) no Splash Damage.
Lord of Pastimers
Voiced by: Mai Kanazawa
One of the legendary Four Lords of Pastimers, she is a student of another all-girls' school nearby and introduced by one of Chisato's friends. She dropped by during Episode 4 to hangout with the Pastimers Club while simultaneously weirding them out to an untold degree.
- Blatant Lies: She states that she's not wearing any makeup; in reality, she could not possibly fit more cakeyness even if she tried. She also claims that the butterfly decoration she wears landed on her head and became her friend, even though it's clearly not a real butterfly.
- Everybody Calls Him "Barkeep": Apparently, she's so famous that people only ever refer to her by her nickname.
- Gyaru Girl: Manba-style, albeit an exaggerated example, so much so that her appearance is heralded by tribal drums.
- Hidden Depths: Despite looking and acting like a trashy ganguro girl, the Lord actually made the top 100 in the national mock school entrance exam, is better at games than the Pastimers Club and is a lot nicer than them to boot, letting Hanako use her cleanser after Kasumi and Olivia do a disastrous makeup job on her.
- Really Gets Around: She got her nickname from sleeping around with students from a neighboring all-boys school.
- Smarter Than You Look: She says studying at home is boring, leading Hanako and Olivia to think that she must be as dumb as she looks, but she immediately follows up with stating that it's a lot easier to just learn everything in class, and mentions that she was in the top 100 in the national mock exams.
Olivia's older brother
Voiced by: Toshiyuki Morikawa
Olivia's Otaku older brother who dropped by during Episode 9 to resolve the issue of his sister's confiscated manga.
- Ain't Too Proud to Beg: He gets down and grovels on his knees after he fails to retrieve Olivia's confiscated manga twice. Amazingly, this works, which was probably in large part due to him creeping out Takayanagi far more than she could stomach, as lampshaded by Hanako.
- Badass Baritone: A nice bonus by virtue of him being voiced by Toshiyuki Morikawa.
- Big Fun: Considered to be this by Olivia, who greatly adores him, despite not being able to grasp a single word he speaks.
- Chivalrous Pervert: In spite of his kinks towards middle school girls and lack of filter, he is nothing but extremely polite and never once goes past talking about it. One of the most upsetting and surprising things Hanako finds about him is how cordial and reassuring he is when texting.
- Everyone Has Standards: Even considering the things that come out of his mouth, he never once goes past the point of imagination and never once oversteps his boundaries.
- Family Eye Resemblance: He and Olivia look nothing alike, aside from how they both have blue eyes.
- Fat Slob: Given how stereotypical his Otaku getup is, being this is practically a given.
- Gratuitous English: Subtle, but it's there when he talks about his blue eyes, or "burū aizū" in his words.
- Hidden Depths: Despite his stereotypical otaku tendencies, he graduated with honors from academy, uses very eloquent vocabulary bordering on Purple Prose, and actually holds two PhDs, despite only being in his early thirties.
- Nice Guy: Is actually quite friendly and charming despite his overtly perverted tendencies.
- No Name Given: Is only ever referred to as "Olivia's brother", unlike his little sister who gets an actual first name.
- Otaku: A rather stereotypical example, being overweight, having long unkempt hair, and wearing a backpack with pins that have female anime characters all over it.
- Phenotype Stereotype: Greatly downplayed in comparison to his sister; unlike Olivia, his hair is black (which adds to his overall image as a stereotypical Japanese Otaku), but he does have blue eyes like she does.
- Sesquipedalian Loquaciousness: He is very verbose and descriptive, usually talking at extreme lengths about certain subjects. It reaches a logical conclusion when his entire speech in Episode 11 starts out normally, then gradually fast forwards to ridiculous speeds as the terminology gets fancier.
- Skewed Priorities: His desperate attempt to retrieve Olivia's confiscated magazine was because he himself wants to read it, not because he wants to reprimand his sister for breaking the school's rules by bringing it to class.
- Silver Tongue: He comes off as extremely nice and dedicated when he's texting, to the point that Hanako is touched by his kind words.
- Verbal Tic: "-de gozaru" or just "-gozaru".
Voiced by: Eishin Fudemaru
Hanako's younger brother. Unlike his erratic older sister, he is very serious and studious.
- Child Prodigy: He's able to effortlessly use physics to figure out how to curve a marble around a soda can into a hole on his first try.
- Disappointed in You: He finds Hanako's fascination with Maeda's butt laser rather weird, and points out how late she is in realizing how creepy that laser was until just a few days prior to Maeda's introduction into the series.
- Foolish Sibling, Responsible Sibling: As Responsible as a gradeschooler could be.
- Precocious Crush: He becomes visibly flustered and blushes when Olivia and Kasumi shower him with affection.
- Sugar-and-Ice Personality: He's generally very reserved and cool toward his older sister, but at the end of the first special admits to himself that he really enjoyed spending time with Hanako. He'll never admit it to her, though.
Voiced by: Bin Shimada
The patriarch of the Honda family and Maeda's savior in his youth.
- Dirty Old Man: If Hanako and Maeda are to be believed, grandpa Honda has quite the perverted mind, having come up with at least two androids that either fling expletives left and right, or constantly hit on girls without a lick of shame or self-consciousness.
- Gadgeteer Genius: He, along with Maeda, made the boyfriend robot for Hanako and the Olivia-lookalike robot that speaks fluent, but crass, English.