Boku Wa Tomodachi Ga Sukunai revolves around the daily lives of the seven members — six students, one adviser — of the Neighbors Club, a school club within St. Chronica Academy whose ostensible goal is to help its members learn social skills and open up to society.
The main protagonist and a second-year transfer to St. Chronica after he and his younger sister Kobato decide to stay behind when their father Hayato went to America to work. Unfortunately, his naturally blond hair (inherited from their deceased English mother Airi) earned him an unwanted reputation as some delinquent. He, together with fellow loner Yozora, is a co-founder of the Neighbors Club.
Accidental Pervert: Twice, towards Sena — completely naked during his visit to the Kashiwazakis' mansion in Season 1 Episode 8, and then topless during the Beach Episode. Subverted with Kobato (his little sister, of course), whom he doesn't mind seeing naked (and neither does Kobato). He also stumbles in on Kate in the shower, but since it was clearly an accident and he apologizes immediately she doesn't care.
All Men Are Perverts: Inverted — It's his female clubmates (mainly Rika and Sena) who create the impression among his schoolmates that he is one, like that one time Rika liberally talked about the thrills of rape in front of him and in the presence of his stunned classmates.
Berserk Button: Hayato may be an absentee parent (justifiable with his career as an archaeologist), but Kodaka doesn't take too kindly to his father being called "trash". Even if that was just a light-hearted quip from Pegasus.
Celibate Hero: Eventually it turns out he is not so clueless - he is just pretending that he is.
Comically Missing the Point: When Sena hands off a galge to him, he spends the entire playthrough hanging out with the Bromantic Foil rather than talking to the girls and is completely satisfied even when he gets a Downer Ending because it means he still has that friend.
Did I Just Say That Out Loud?: In episode 2 of Season 2, Kodaka runs into a Rika in the club room without her glasses on. She tells him her vision is perfect, and the glasses are actually fake. She then asks him what he thinks of her, and he has a brief Imagine Spot where he says she's like a wildflower blooming on a hill, and right in his strike zone. Rika's face then turns red, and he earns himself some slight scorn from Yozora, Sena, and Yukimura.
Kodaka pulls this off AGAIN in episode 7 when he comments that Rika looks cute and that cute clothing would look good on her, as opposed to her school uniform which she seemed to wear all the time. Once again, Rika's face turns red and none of the other girls are too pleased about hearing that.
Epiphany Therapy: At the end of Season 1 Episode 11, seeing Yozora with her hair cut short on their first day of school after summer break finally made him realize that "Sora", his Forgotten Childhood Friend, is her all along.
Master of the Mixed Message: Whatever his reasons, Kodaka refuses to pick one of the girls in the club to date, despite the obvious fact that every single one of them is in love with him. It's because he doesn't want to get into a relationship; he really just wants to make friends.
Nice Guy: Contrary to his classmates' instant assumptions. He has seen Sena completely naked on one occasion, and topless on another, but each time he denied having seen it, the first by claiming he was drunk when she was chasing after Kobato naked in her mansion, and the second time he claims he was putting suntan on Kobato so didn't get a look at the beach.
No Guy Wants to Be Chased: The poor guy is put off by Rika's promiscuously open advances and fails to realize any genuine interest in him she may have. This is notwithstanding the fact that he has shown some signs of attraction towards Rika when she is not being perverted, though he has yet to display any explicit romantic intentions.
Only Sane Man: Kodaka seems like the one sane and normal member of the group, if a bit dense. However, like Kobato, he actually holds people at arm's length, refusing to get close or acknowledge things he doesn't want to.
Selective Obliviousness: When his failure to recognize the girls around him grows too strong, Rika begins to suspect that he's going out of his way to never, ever notice how they feel. Further events make it plain that he knows and is intentionally ignoring the issue. This culminated with Rika confronting him at the end of the novel, where Kodaka made it clear he'd rather ignore their feelings. Rika was willing to pretend it never happened like he wanted, but made it clear that one of the other girls was going to take a shot soon and he really needed to be ready for that. He wasn't: Sena openly confessed and he ran away.
Shrouded in Myth: Has the unfortunate reputation of being a delinquent thanks to his blonde hair and an intimidating facial expression (especially when angry). It also doesn't help that he goes to school with the lower ends of his pants folded up to below his knees and wears loafers. Then the rumors keep growing. From the second novel:
Kodaka: There's all kinds of rumors like how I supposedly raped Yozora and Sena, forced Yukimura to be my errand boy, raped Rika too, made a move on a sister, and even that I make a little girl walk around school in goth loli clothes...note original quote: 夜空と星奈を手籠めにしているだの、幸村を無理矢理パシリにしているだの、理科を陵辱しただの、シスターに手を出しただの、幼い少女にゴスロリ服を着せて連れ回しているだの……。
Supreme Chef: His food is good according to Maria and Kobato, and in episode 10 he laments that of all the club members, he's the only one that can cook.
For a moment at the start of the story, Kodaka thinks he might be the hero in a supernatural Shōnen Genre show. Nope, he's the main character in a Harem Anime with socially-challenged hot girls in the mix.
Following this he refuses to recognize that he's in a harem anime rather than pure slice of life.
An abrasive loner with a strange hobby of talking to an "air friend" named "Tomo". After a small talk with Kodaka who caught her "talking" to "Tomo", she becomes a co-founder of the Neighbors Club.
Aloof Dark Haired Girl: She's distant from her classmates and her looks are appreciated at least, but then it turns out she's so distant because she's a complete Jerkass who can't socialize with others.
Clingy Jealous Girl: Will often hit Kodaka if he stares too long at one of the other girls, or makes a comment that suggests he's interested in them. She also stopped Sena and Kodaka from kissing in a king's game, claiming it was indecent, despite having been the one who wrote that order. *
In a king's game, players draw lots/cards, and whoever is the king can order the other players, based on their numbers, to do things. In this case, Yozora wrote a note stating number 3 and the king would have to kiss, but it backfired on her when Sena became the king with Kodaka was number 3, and drew the note with the kiss.
A Day in the Limelight: Chapter 1 of the Shobon! spinoff manga, where she snarks at the situation of the Club but is nevertheless willing to put up with them as long as Kodaka is happy (and so is she)... and develops a fetish for having her armpits touched.
Dialogue Reversal: The first time Yozora gets cut down to size by Sena, she angrily storms out of the room.
"Kashiwazaki Sena you stupid!"
Expository Hairstyle Change/Important Haircut: After Kodaka accidentally burning her hair with a firework near the end of summer break, Yozora returns to school with her hair cut short. At this very moment Kodaka finally recognizes her as "Sora", the "boy" who used to be his only childhood friend. This also marks the point where she starts to show her deredere.
Foe Romance Subtext: Her constant squabbles with Sena imply something beyond their name-calling and the occasional catfight, a fact that wasn't lost on Kodaka.
Forgotten First Meeting: She was the "boy" who once saved Kodaka from, and then joined him in fighting, a bunch of bullies when they were children. They quickly became friends, but then Kodaka had to move just when Yozora was confident enough to dress up as a girl in front of him.
Friend to All Children: Season 1 Episode 12 reveals that she actually has a soft spot for children, going so far as to put up with Maria's bratty attitude while she tried to politely ask for her permission to lend her favorite naptime room to the Club before finally losing her patience. She is also shown to be protective of Kobato, and is often the first to try to keep Sena in check.
Friendship Moment: She has at least two. One occurs early on when she says she won't tell Kodaka her nickname, because nicknames are something only friends give to each after. Not long after, she gives Sena the nickname "Meat". Insulting, but still a nickname. Later, in Volume 6 of the novels, she shows genuine remorse over hurting Sena's feelings, unlike when they seem to be mostly playing around. She's apparently pretty happy when Sena's mood improves thanks to Kobato.
Green-Eyed Monster: While on a roller-coaster ride with the rest of the Club, she starts blurting out some of her resentment towards Sena, blaming her for things going wrong in her life and Kodaka not paying enough attention to her. Nobody hears any of that part instead of the creepy chanting about cursing and killing she starts after that in her panic.
Important Hair Cut: She has one at the end of episode 11 in the first season due to her hair getting singed and doused with water used to put out fireworks. As a result, Kodaka is able to recognize his Childhood Friend Sora, who was Yozora with shorter hair.
It's All About Me: Extremely self-centered to sociopathic levels, easily upset when things don't go her way, to the point of throwing a tantrum, and holds extreme hatred against "popular" people, no matter whether they deserve it or not.
Jerkass: Yozora denies being a bully, but Sena would probably disagree. However, her abrasive nature is really just what Sena and Maria need, as both are rude, selfish and demanding. When forced to interact with someone that doesn't kowtow to them, they both start behaving more like decent human beings.
Hidden Heart of Gold: Special mention goes to episode 11 of NEXT, when she cancels their films because Rika got sick saying it wouldn't be fair if all seven of them couldn't watch it.
Lack of Empathy: Subverted, she does show some remorse sometimes when joke goes too far.
Love Hungry: She feels entitled to Kodaka since she's known him the longest. Her usual methods are Relationship Sabotage and being a Manipulative Bitch. That's about as far as she's willing to go though since she doesn't outright hate the rest of the group.
Plagiarism: She simply took the movie script for a moderately popular Japanese movie and hoped that no one would recognize what she had done. Then they started filming it. Without Sister Kate pointing out the similarities to Kodaka she'd have gotten away with it too.
Sitcom Archnemesis/Vitriolic Best Buds: With Sena. According to her, only true friends can give each other nicknames, so even if she gave Sena the insulting nickname of "Meat", it's telling something about their relationship.
Sour Prudes: Lampshaded by Rika, who couldn't care less for Yozora's uptight rebukes (unlike poor Sena).
Stepford Snarker: Talking to an Imaginary Friend and acting like a total Jerkass towards everybody else (especially Sena) may indicate some issues beneath her snarkiness. May or may not have something to do with her past with Kodaka.
Tall Poppy Syndrome: She prefers to sabotage everyone else rather than put forward any effort regarding Kodaka herself if she ever feels someone is doing or looking better than her. This frequently backfires on her. This syndrome also serves as the basis of her disdain for "popular" people, as she'd rather make death wishes to them rather than improve her own image.
Tsundere: A vicious Type A — utterly abusive to everybody (especially towards Sena), but occasionally shows a softer side towards Kodaka.
What Is This Thing You Call Love?: Apparently finds inter-gender relations a confusing, somewhat disturbing mess, and would prefer being Just Friends. In fact, her dislike of Sena's eroges stems not so much from their sexual content as they are about romance. It just so happens that Sena is very protective of her games and the characters therein. Hence, she finds herself more comfortable watching a BL movie recommended by Rika, keeps insisting that the relationship between its male characters are "pure camaraderie" despite the movie's not-so-subtle homoeroticism. This seems to change as the series goes on; in Volume 7 she even propositions Kodaka for sex, although he doesn't hear her and may not have been meant to.
Why Did It Have to Be Snakes?: Dislikes parlors. Being a girl who values privacy, she dislikes how people there keep babbling about things best left private, such as romance, careers, etc., so she takes care of her hair all by herself. Part of her dislike of crowds.
Daughter of Pegasus Kashiwazaki, headmaster of St. Chronica Academy. Her connections, wealth and beauty — alongside a huge pair of knockers — has boys fawning all over her, and likewise girls casting many an envious eye on her. Despite being constantly surrounded by boys, all she wants are true friends, driving her to become the third member of the Neighbors Club.
All of the Other Reindeer: Sena's Rich Bitch attitude may have come from the fact that she's smart, good looking, athletic, well-stacked and seemingly popular with the boys. Which causes other girls to develop some jealousy and therefore isolate her as well as spread rumors about her to make her look bad and probably make themselves feel better. Kodaka points this out in the first episode when she introduces herself formally.
Bastard Girlfriend: Invoked. She thinks stepping on someone is a kind of reward since her fanboys approve of it and fails to understand Kodaka's dismay at the idea, though she largely ceases making such offers as time goes on.
Bi the Way: As long as she's cute (like Kobato), Sena will be as affectionate to any girl as she would a guy she likes.
Berserk Button: Never ever insult her games and/or the characters therein.
Break the Haughty: Sena's mind-boggling arrogance ran unchecked... until she met Yozora.
Expy: A friendless achiever who's also a galge addict trying to push her hobby on the main character and has an unhealthy fixation with his little sister? She might as well be an older, blonde, big-breasted Kirino.
(In Season 1 Episode 5): "There's no way your [Kodaka] little sister [Kobato] can be this cute!"
Foot Focus: She is rather fixated on having people lick her feet. Cranked up to several references per episode in NEXT.
Forgotten First Meeting: In Volume 7/Episode 9 of NEXT, it turns out that Kodaka and Sena have known each other ever since kindergarten age, joining Yozora as one of Kodaka's childhood friends. Moreover, their fathers have also arranged for the two to marry each other when they grow up.
Freudian Slip: In Volume 8, she inadvertently proposes to Kodaka while playing a galge, setting in motion the series' Wham Episode.
In Season 1 Episode 2, during a Friday meeting, Yozora asks Kodaka and Sena to bring PSPs with the Monster Hunter-esque game to next Monday's meet. Come Monday, Sena claims she barely touched the game. Kodaka mentions he's still a Level 1, while Yozora boasts she's at Level 3, but somehow Sena is already at Level 6, the highest class/level in that game. Yozora immediately yanks her PSP, and discovers that Sena's gameplay time was at 53 hours, and that Sena had some bags under her eyes, meaning she spent the entire weekend playing the game extensively with little sleep.
Gullible Lemmings: Her cluelessness about many "normal" things is mercilessly exploited by Yozora.
Instant Expert: Despite her quirks, she's rather smart and can pick up on things fairly quickly. In Season 1 Episode 3, Kodaka was amazed at how she managed to become a proficient swimmer after only an afternoon's worth of lessons, and in Next Episode 1, she defeated him rather easily several times in a fighting game despite being a complete novice compared to Kodaka, who's played the game with Kobato many times.
Love at First Punch: In Season 1 Episode 3 (Volume 1 of the novels), Sena realizes that of all the boys she has interacted with, Kodaka was the first (and likely only) boy to have called her out on the consequences of her Rich Bitch tendencies. She finds herself enamored with him afterwards while before she had only expressed a mild interest.
Love Confession: Right after sending Aoi away, Sena openly confesses to Kodaka in front of everyone. He tries to pass it off and ignore it and she does it again. Lacking any way to maintain the status quo, Kodaka runs away.
Screw the Rules, I Have Connections!: Being the headmaster's daughter really helps. When Aoi points out the fact that Maria is not an official teacher/nun in order to delegitimize the club, she manages to turn the tables with just a brief phone call to her papa, who decides to make Maria a special part-time lecturer.
Sitcom Archnemesis/Vitriolic Best Buds: With Yozora. Despite being given the insulting nickname of "Meat", Sena confessed to Kodaka that she is secretly happy with it because she has never been given a nickname before.
Stalker Shrine: Her ceiling, which is covered with Yozora pics, reminds Kodaka of this.
Super Drowning Skills: Claims to lack basic swimming knowledge, blaming her primary school's lack of such an education for it. She asks Kodaka, who's a decent swimmer, for help. To his surprise, she's a quick learner.
Tsundere: Type A, which doesn't help her reputation among girls. She's nicer to the club members though so long as she doesn't get carried away. Which happens a lot. In the eighth novel she gives a classic 'I didn't do it for you' line, but it's noted that she really means it. Helping Maria become a special lecturer was just a byproduct.
Voiced by: Nozomi Yamamoto
An extremely effeminate freshman who idolizes Kodaka, whom he deems to be a "man among men", and joined the Neighbors Club due to his presence there, hoping he can teach him how to become more manly. Yukimura is, perhaps unsurprisingly, a girl who was raised to believe she was male.
All of the Other Reindeer: According to him, the other boys would often distance themselves from him whenever he undresses, and they don't throw him the ball at dodgeball. Makes a whole lot of sense once it is revealed that "he" is a girl all along.
Bad Bad Acting: Apparently has a problem changing the usual deadpan tone when acting in a movie made by the Neighbors Club.
Big Brother Attraction: Of the sorts, towards Kodaka, whom he calls "Aniki" (literally, "big brother", but in this context, an honorific used by yakuza towards their superiors).
Undying Loyalty: Claims to have one towards Kodaka. The latter plays along, knowing how emotionally fragile Yukimura is.
Unsettling Gender Reveal: A partial one to Kodaka on Episode 8, and a full one to the entire Club come Volume 5 of the Light Novel/NEXT episode 4. Yukimura was the most unsettled, in a rare inversion/reflection of the trope.
A freshman and scientific genius whose presence at St. Chronica was designed to increase its prestige. Otherwise she's a loner whose classroom is a laboratory the school made for her. After Kodaka saves her from a mishap involving sleeping gas, she joins the Neighbors Club to get close to him... while revealing an extremely perverted side with an unhealthy passion for mecha-on-mecha H-doujins.
Bunny-Ears Lawyer: Sena mentions her father built the science lab at school solely to have Rika attend there so she could do more research. She's also mentioned helping various companies out as well, hence why she has access to prototype products they're developing, as well as having them acquire manga and games for her from Comiket so she doesn't have to go herself.
Girl Next Door: Kodaka keeps getting this feeling from her... when she's not talking about her perversions.
The Glasses Come Off: Before Season 2 of the anime and up to halfway through Volume 4 of the light novels, Rika wears her glasses. During this time, she's largely comic relief. She takes them off just as she begins to seriously try to get Kodaka's attention and to understand his behavior, gradually becoming a much more serious character.
Intelligence Equals Isolation: The only reason she's even in St. Chronica is because Tenma, Sena's father and school headmaster, personally had her enrolled in order to boost St. Chronica's reputation.
It's What I Do: Don't even bother to lampshade her perversions. She knows it and for her, it's nothing to be ashamed of.
Obfuscating Insanity: While genuinely quirky, she plays up the attitude a great deal and seems to be more friendly, well adjusted and perceptive than the rest of the club. It's not Sena or Yozora that catch on to Kodaka's distant attitude, it's Rika.
Sir Swears-a-Lot: She's not an angry or spiteful girl by any stretch, but her absolute frankness in usage of sexual vocabulary (e.g., "Rape me", "Care for a fuck", "I'm so horny", etc.) in public would make any conversation with her a very harrowing experience.
During the rollercoaster ride in Volume 5/Episode 4 of NEXT her mouth goes berserk on her and she pretends to have no memory of the event afterwards. To Quote:
"Fuck, fuck, fuck, fuckkkkkkkkk! God damn gravity you piece of shit...! You don't care who it is as long as you can pull down on them, do you, you little bitch!! Gravity, you piggy bitch slut! Holy fucking shit what a god damn whore you are...! Hah, you're Earth's greedy little slut, you damn bitch in heat! Fuck you universal gravitation, you're just Newtonian Mechanics' dirty little whore! You're just the crusty semen left over in that slutty apple's pussy after that son of a bitch Isaac fucked its rotten juices! Special theory of relativity, you impotent phimosis piece of shit! Einstein, you old limp dick fuck! What, got something to say!? Then move that tiny little twig of yours faster! Cum faster than the speed of light! A pig that can't fly through space-time is just a piece of shit that reeks of semen and can't even last 5 seconds in his wet dreams! Fucking fucking fucking fucking fucking fucking fucking UNIVERRRRRRRRRSSSEE!!"
Took a Level in Jerkass: In Season 2, she constantly voices her frustrations with Kodaka either ignoring her, or his apparent Oblivious to Love attitude. In episode 6, when she puts up a Tsundere front while practicing for a maid cafe, she also kicks him repeatedly, and goes a bit too far with the attitude, possibly venting some frustrations with the way he's been treating/ignoring her.
Too Kinky to Torture: There's a good reason Yozora stopped trolling her — any attempt to do so backfires spectacularly on her with an additional erotic context that leaves her exhausted. She decided that simply following along anything Rika says and/or does would be less of a stretch.
Unlimited Wardrobe: A variation. In season 2 (volume 4 onward, in the light novels), she begins to regularly change her hairstyle and accessories.
Kodaka's thirteen-year-old little sister and a second-year junior high transferee to St. Chronica, who claims to be a centuries-old vampire named "Reisys V. Felicity Sumeragi". She becomes the sixth member of the Neighbors Club (with Yozora's approval) despite her juniority.
A-Cup Angst: She gets upset when she realizes her elementary school clothes still fit her — a fact made worse by having a chest even smaller (for a thirteen-year-old, even) than Maria's. And no, Maria is no bustier than an average ten-year-old. Then she gets even more upset after seeing Kate's body.
Accent Relapse: Her Reisys accent goes out the window and her normal Kyushu tongue comes out when she gets flustered.
Hate At First Sight: Sena instantly gets on her bad side by being a complete creep and being all over Kobato, who obviously prefers a level of distance. Subverted with Maria, though, since the two actually appear to be best friends.
Innocent Fanservice Girl: Doesn't mind being naked around her older brother, who likewise doesn't mind. She runs into him nude twice — in Season 1 Episode 3, upon realizing her bathwater has gone cold; and again in Episode 9, while being chased by an equally naked Sena apparently trying to go frisky on her in the bath. Also, she makes Kodaka watch her "transform" (as in undressing and changing into another outfit) in Episode 8.
Japanese Pronouns: "Ware" when using her vampire persona, "uchi" when being an ordinary little girl.
Limited Wardrobe: Subverted starting Episode 8 — due to their house's air conditioner breaking down and with a replacement three days away, she, with Kodaka's prodding and inspiration from the same anime from which she took her current style, starts dressing up in normal, less stuffy outfits. Even when she returns to her usual style, her subsequent wardrobes are at least reasonably comfortable for any kind of weather.
Mismatched Eyes: Invoked. Episode 5 reveals that she has a complete pair of blue eyes; she just likes to put red contacts over her right eye to evoke a sense of otherworldliness as part of her vampire cosplay.
Misplaced Accent: When in-character she speaks with an accent that is so alien from her native Kyushu tongue that she has trouble with a lot of words, though this could be attributed to her age as well.
Our Vampires Are Different: As "Reisys V. Felicity Sumeragi", Kobato claims she's over a thousand years old, believes that vampires already had an advanced civilization ever since humans were still cavemen, and claims to have a weakness to cold water.
Shrinking Violet: She's not good with strangers when not using her vampire persona.
Sitcom Archnemesis: With Maria, though to a lesser extent than that between Yozora and Sena. Then their relationship evolves to...
Big Eater: She often talks about or is seen eating lots of food.
Bratty Half-Pint: Shows this side in Season 1 Episode 12, during a flashback when she refuses Yozora's polite requests to lend her favorite naptime room for the Club's use, peppering her with insults in between. Yozora, normally a Friend to All Children, had to endure more of her insults before she finally snaps and slaps some humility into her.
Has absolutely no idea how sex works until Rika tells her.
She also goes into the bath with Kodaka and Yukimura while they are visiting the theme park. She sees Kodaka's male package hanging down there, and then inadvertently reveals Yukimura's true gender when she wonders why the latter doesn't have the same thing Kodaka does.
In episode 3 of Season 2, she reads a couple of otherwise erotic lines innocently, not really understanding what she was saying.
Cloudcuckoolander: Most members of the Club show shades of this, but she definitely lives and breathes this trope.
Maria finds out in volume 8 of the novel that she is not officially a nun or a teacher at the school and only Kate is, which does give a valid explanation about her Improbable Age but raises more questions about her sister.
Maria's fifteen-year-old sister. While she's slightly younger than Kodaka, she maintains the manner of a Hard Drinking Party Girl crossed with a Dirty Old Man. Contrary to her slightly gruff attitude towards her little sister, she seems to be a rather doting sister.
Sena's classmate and student council treasurer, who harbors an intense rivalry with Sena due to being perpetually just behind the latter in exams. She also sees Kodaka as a "cool guy", unlike many other students who are afraid of him.