History Characters / OreNoImoutoGaKonnaniKawaiiWakeGaNai

14-year-old (later 15) Kirino, the titular ''[[LittleSisterHeroine imouto]]'' (little sister), is a model student with excellent grades, competent athletic skill and great popularity. On the other hand, she's also an {{otaku}} with a fetish for {{Little Sister Heroine}} {{eroge}}. Kyousuke discovering her double life is what starts their first serious interaction in years. Eventually, Kirino opens up her otaku personality more thanks to her brother and gains friends in that world.

* UsedToBeASweetKid: There was a time when Kirino was a cute, loving little sister. Then [[spoiler:Kyousuke just had to give up the cool figure he always presented to Kirino, breaking her heart. No wonder she TookALevelInJerkass]].

* [[TalkingToHimself Talking To Herself]]: Taken to massive levels of meta in the DVD commentaries, where Kirino interviews ''[[Creator/AyanaTaketatsu her own seiyuu]]'' on how it was like to voice ''herself''.

* PlayingAgainstType: After a decade of playing emotionally-reserved and dead-serious warriors like Kanu Unchou of ''Ikki Tousen'', Creator/HitomiNabatame finally sinks her teeth into a bright and upbeat role like Saori.

** Even pointed out in the DVDCommentary by juxtaposing footage of him and Siscalypse's tsundere character. The commentators are disturbed. FumihikoTachiki seemed to be having fun with this in Daisuke's second commentary appearance, putting on a vaguely effeminate tsundere voice during some of his "moments".

->'''Voiced by:''' FumihikoTachiki

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* FanNickname: "Brosuke"

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%%* OtakuSurrogate

* GroinAttack: Attempted by her to Kyousuke in episode 4. She succeeds in episode 5. Also serves as a bit of a KickTheDog moment as Kyousuke was trying to ''help'' her when she did it.

%%* ThePatriarch

* TheAce
* AlliterativeName

* CuteLittleFangs

* AlliterativeName

* DeadpanSnarker

* UnluckyEverydude

* BreakoutCharacter

* CoolBigSis

* HimeCut

* LittleMissSnarker

* {{Meganekko}}

* SecretlyWealthy

* BlindWithoutEm

* {{Meganekko}}

* AlliterativeName

* ACupAngst - She's self-conscious about being flat-chested and undeveloped in the VisualNovel, to the point of teasing Kyousuke about being a {{lolicon}} when he shows some attraction to her. In both the Light Novel and the Visual Novel, she basically forces Kyousuke to fondle her chest.
* AlliterativeName
* AscendedExtra - She gets her own mini-route in the PSP game, as an offshoot of Ayase's route. In the sequel, her route is extended to be the same length as the other girls. [[spoiler: The omake novel that came with the PSP game has Kyouhei married while living with his parents. Despite the fact that the wife is never named, it is implied by the exchange that the wife is Kanako.]]
* BitchInSheepsClothing - Acts cheerful when a job prospect comes up, but when not working or if the job turns out to be fake, she immediately loses interest. However, like Ayase, she starts to show her good side.
* BlackmailIsSuchAnUglyWord - In her mini-route, Kanako blackmails Kyousuke into paying for various activities in return for not telling Kirino that her "manager" was Kyousuke. Rather than blackmail, she calls it "courteous service for a lady," which Kyousuke can't help but laugh at.
* ClingyJealousGirl - In Volume 10/episode 11 of season 2, she wonders why Kyousuke is eating food made by other girls, when he should only be eating food she made for him. This while she herself is learning to cook (from Manami, who she got in touch with through Ayase). Like with Ayase, she butts heads with Kuroneko on this subject.

* GirlishPigtails
* HatesTheJobLovesTheLimeLight - In Season 1 Episode 10, Ayase fooled her into wearing a Meruru costume due to her uncanny resemblance to said character. Although offstage she gripes about it, while she's performing on the stage, she seems to give herself entirely to the act as she sings and wows the audience.
* JerkWithAHeartOfGold - Beneath that crass attitude she is surprisingly a decent person, going so far as to quickly accept Kirino for who she is upon learning of her secret hobby.

* LittleMissSnarker
* LoveConfession: to [[spoiler: Kyousuke during one of her concerts]]
* OddFriendship - She more or less befriends Bridget, the blonde girl she beat during the Meruru cosplay contest (who didn't have a very good impression of her offstage). At one point in the novel, Kanako protects her against an older man who seemed to be getting a little too frisky with her, only to find out that it was her father, but Bridget nevertheless appreciated the thoughts behind Kanako's attack.
* OlderThanTheyLook
* PantyShot - There's one in Volume 4 of the LightNovel while she's doing the Meruru show. Also, on the DVDCommentary she shares an anecdote where Kirino asks what color panties she's wearing and flips up her skirt, much to Ayase's consternation. She does this while [[FunnyBackgroundEvent playing Kirino's panty shots up to that episode in the anime on the monitor in the background.]]

* JerkWithAHeartOfGold - "You... you... ''bastard son! [[PetTheDog Do as you wish!]] '''[[IfItsYouItsOkay I DON'T GIVE A DAMN ABOUT IT!]]'''''"

* ThePatriarch
* PetTheDog - He has his moments, even if he isn't happy about issuing them (as seen at the end of Volume 1 and episode 3 when, with a frustrated expression on his face, he orders Kyousuke to do as he wishes with the eroge, even if he wants to keep it all, right after punching him in the face for being a siscon).
* ReasonableAuthorityFigure - He had to be convinced about Kirino's hobby, but he also doesn't restrict his kids, such as not allowing Kirino to use her money how she wants, nor does he actively meddle in their affairs constantly like other parents. He also did some research about Kirino's hobby, and eventually became able to transcend common misconceptions about the otaku culture.

* {{Tsundere}} - Even pointed out in the DVDCommentary by juxtaposing footage of him and Siscalypse's tsundere character. The commentators are disturbed. FumihikoTachiki seemed to be having fun with this in Daisuke's second commentary appearance, putting on a vaguely effeminate tsundere voice during some of his "moments".

* ReasonableAuthorityFigure - She doesn't seem shocked when Kyousuke tells her he knew about Kirino's secret hobby. She also doesn't make a big deal about him having porn either, but likes to poke fun at him for it.
* {{Troll}} - Look at that face. ''Look'' at that ''smug'' face!

* BetaCouple - His relationship with Sena is quite similar to Kyousuke and Kirino's relationship, and often compared to theirs in the light novels. A major difference is that he has no problem with saying his sister ''is'' cute. At one point in the DVD commentary, when a possible SpinOff is teased he says the name would have to be ''"My Little Sister is Cute!"'', causing much {{tsundere}} blushing on Sena's part.
* BrotherSisterIncest - Implied, with Sena. It's to the point where he was looking to buy a sex doll that looked just like Sena... which he saw while he was buying her a gimp suit in a porn shop for her "research."

* HandsomeLech - Kouhei is implied to be quite good looking and popular with the ladies. Of course, we only ever really hear about his relationship with his little sister and the perverse otaku baggage that brings...
* ShipperOnDeck - For Kyousuke and Manami.
* VitriolicBestBuds - He and Kyousuke have a relationship surprisingly similar to that between Kuroneko and Kirino, although not as intense.

* BetaCouple - Her relationship with her brother is remarkably similar to that of Kirino and Kyousuke, except with no pretense of hating each other.
** She actually ends up with [[spoiler: Makabe]], however.
* BrotherSisterIncest - Implied, with Kouhei.
* BuxomIsBetter - She is an E cup, and she has some minor {{Gainaxing}} going on in the anime as a result. Kyousuke's internal monologue lovingly focuses on her breasts sometimes.
* ClassRepresentative - At first glance she fits the trope in both name and personality. However, past the diligent student exterior she often gets [[YaoiFangirl fired up over her hobby]] and [[{{Tsundere}} mushy around her brother]].
* CovertPervert - She generally seems mostly normal, but when relaxed enough that she actually ''talks'' about her fetishes, things get... really interesting.
* FieryRedhead - Concerning her fetish.
* HypocriticalHumor - Gets all bent out of shape when Kyousuke mentions an {{eroge}}, calling him "sexual harassment [[SempaiKouhai sempai]]". After seeing her game presentation, Kyousuke calls her "[[IronicEcho sexual harassment kouhai]]."
* InSeriesNickname - The aforementioned "sekuhara sempai/kouhai" (literally "sexual harassment senior/junior") names she and Kyousuke call each other.
* {{Meganekko}}
* NightmareFetishist - At first, she just seemed like a yaoi fangirl. And then her game came along and had anal fisting up to the entire arm; [[ILoveTheDead necromancer yaoi]], ''and'' anal using the hilt of the Masamune. ''All in a single scene.'' She's actually surprised this proposal is rejected.
* RedOniBlueOni - The red to Kuroneko's blue.
* SeriousBusiness - Her Yaoi
* ShipperOnDeck - For Kirino and Kyousuke. Specifically, ''"[[GenderBender Kirino-kun]]"'' and Kyousuke, which she draws in a doujinshi that she sends Kirino.

* YaoiFangirl - [[UpToEleven So much so]] she fantasizes about one of her clubmates getting gangraped by the other members. Cue looks of horror and disbelief from her fellow club members when she [[DidIJustSayThatOutLoud blurts this out]].

* ClubPresident

* NiceGuy
* OtakuSurrogate
* ProudToBeAGeek

* [[spoiler: BetaCouple]]: with Sena

* NiceGuy

* OnlySaneMan

* PrecociousCrush: on Kyousuke during Kuroneko's route in the second VisualNovel

* DeliberatelyCuteChild

* NiceGuy
* OtakuSurrogate

* [[spoiler:FalseStart: Kirino says ''something'' that's drowned out by the crowd noise at the end of volume 9. Whether it's just a thank you or a confession is left unresolved, but Kyousuke seems to have gotten the message.]]

* [[spoiler: HappilyMarried: She marries Kyousuke in a fake wedding in the final episode of season 2, then they immediately break up to just be normal siblings.]]

* [[spoiler:IWantMyBelovedToBeHappy: After the incident with Kyousuke telling her he doesn't want her dating other guys, she was about to tell him the same when she found out Kuroneko was about to confess to him. She decides that being jealous is better than Kyousuke being sad and denying her best friend a shot at happiness, especially knowing how shy Kuroneko really is.]]

* LaserGuidedAmnesia - In the PSP VisualNovel, Kirino catches this through a combination of her jealousy towards Manami going with Kyousuke on the class trip and Kuroneko pointing out how similar Kirino's situation is to an eroge and telling her that she would lose sense of reality. It only affects her memory of anything related to her otaku hobby, including all development of her relationship with Kyousuke. The "convenience" of how exact this is is lampshaded immediately and repeatedly.
* LittleSisterHeroine - She is one herself and plays these kinds of games exclusively.

* LoveEpiphany - A second type. Kirino always love Kyousuke, but her BigBrotherAttraction keep making her deny her feeling. At least until he confessed.
* MaleGaze - [[http://safebooru.org/index.php?page=post&s=view&id=587010 The shots of her ass in the anime]][[http://www.mangafox.com/manga/my_little_sister_can_t_be_this_cute/v01/c001/32.html and the manga.]] Kyousuke even [[DeadpanSnarker coolly says]] "nice ass" to her in the in-character DVDCommentary when this particular shot comes up.
* ManicPixieDreamGirl - Kirino is manic to an extent, and looks the part, but it's actually Kyousuke who brings Kirino out of the solitude caused by her hobby. On the other hand, Kyousuke also starts to have a much more interesting life as a result of his actions, so it works both ways.
* MsFanservice - This isn't really a fanservice series (one can even count the total amount of {{Panty Shot}}s on the hands), but almost all fanservicey shots come from Kirino.
* NotBloodRelated - In an [[WhatIf If]] route (which is even less canon than the other routes of the PSP game), Kyousuke discovers that he's not actually Kirino's brother. As soon as both siblings are aware of this, they almost immediately start a relationship. The ''night'' Kirino finds out, she tells Kyousuke to sleep[[note]]what definition of sleep is ambiguous, but she's putting on her kissy face while she says it[[/note]] with her so she can be sure he won't move away now that he knows he's not related to the family.

* OtakuSurrogate - [[PeripheryDemographic Her taste in anime and eroge]]. Said anime and eroge are often aimed at [[{{seinen}} older men]]. In one scene in the PSP VisualNovel where she's attending a Meruru live event, her line while screaming like a maniac is tagged "Otaku" instead of her name.
* ParodySue - Other characters (such as Kuroneko) are annoyed at how perfect she is at (almost) everything -- academics, athletics and even modeling. Except she ''actually'' worked hard to earn her skills, and has to rely on Kyousuke or Kirino to help her in matters relating to anime, manga, games or light novels. [[spoiler:Come Volume 11, it is revealed that the reason Kyousuke is also annoyed at her present self is because she reminded him of his former self, and subsequent developments reveal that Kirino's talents sprang from her attempts to "surpass" her brother.]]

* PutOnABus - She is away in America for most of Volume 5 of the light novel and the [=ONA=] episodes.
* PantyShot - The camera does not want to cooperate with those short skirts she likes to wear.
* RedOniBlueOni - The red to Kyousuke and Kuroneko's blue.
* [[TalkingToHimself Talking To Herself]] - Taken to massive levels of meta in the DVD commentaries, where Kirino interviews ''[[Creator/AyanaTaketatsu her own seiyuu]]'' on how it was like to voice ''herself''.
* TearsOfJoy - [[spoiler: At the end of episode 14 of season 2, after nearly two year of self-denial and inner struggling, she finally accepted the fact that she loves Kyousuke more than as an older brother, and shed tear of joy when he confessed to her.]]
* {{Tsundere}} - Kirino in the anime is a Type B towards Kyousuke and Kuroneko and ''very'' heavy on the tsuntsun; other versions are much more evenly balanced. All, eventually, [[DefrostingIceQueen defrost]] to at least some extent. The PSP [[WhatIf If]] route where she and Kyousuke are NotBloodSiblings heavily implies that the heavy tsuntsun is entirely because of her anxiety about her BigBrotherAttraction. When that obstacle is removed she immediately goes 90% deredere, and tells Kyousuke that she actually always liked him, even before the events of the story.
* UsedToBeASweetKid - There was a time when Kirino was a cute, loving little sister. Then [[spoiler:Kyousuke just had to give up the cool figure he always presented to Kirino, breaking her heart. No wonder she TookALevelInJerkass]].
* VitriolicBestBuds - With Kuroneko, no matter how both of them deny it.

* [[spoiler: TheAce: Resembled one of these three years ago with good grades, a good amount of athleticism and an overzealous enthusiasm for helping people.]]
** [[spoiler: BrokenAce: Essentially gave up trying to be special due to events revealed in volume 11.]]

* BigBrotherInstinct - A major plot point is that he was so jealous of Kirino's success that he turned this instinct ''off'' until the beginning of the series.
* {{Bishonen}} - A borderline example. He's arguably full blown in the manga, though.

* BrotherSisterIncest - People like to joke about how close Kirino and Kyousuke are. The novels started out pretty vague, [[spoiler: but in Volume 9 he and Kouhei actually have a contest about whose little sister was cuter. Kyousuke actually wins the later contest their little sisters have over whose brother is the biggest siscon.]]
* TheCasanova - DVDCommentary Kyousuke is quite good at chatting up any female co-hosts, even if the lines shouldn't really be working so well...

* CovertPervert - For whatever reason, he becomes ''obsessed'' with breasts in Volume 8 of the LightNovel.

* CryCute - A rare [[ManlyTears male example]], courtesy of Kirino ''actually'' apologizing to him. In the anime, it's after she throws him a {{Meido}} party as restitution for disgusting him with her appalling treatment of Manami. In the novel, it's after said party ended up a failure, with Kyousuke being pushed too far by Kuroneko's manga and Kirino and Kuroneko beaning him over the head with a chair for seeing their 3D analogues get stripped naked in a custom Siscalypse game Saori brought.

* FanNickname - "Brosuke"

* IJustWantToBeNormal - Kyousuke's outlook on life before he reconnects with Kirino. He starts going through withdrawal symptoms when she's not around.
* InSeriesNickname - He's called "Sexual Harassment Sempai" by Sena, Kuroneko repeatedly calls back to this whenever she perceives him acting a bit perverse.

* NiceGuy - One of his defining qualities. Although he hates to do it, he will often go to great lengths to help out Kirino, [[DudeWheresMyRespect even if its largely unappreciated,]] and this is one of the main reasons why so many of the girls in the series falls in love with him.

* ObliviousToLove - Manami's anyway. [[spoiler:He gets a bit better with Kuroneko.]] He goes to a rather frustrating extreme in Manami's route of the PSP game, where he continues to be kind of blase about the whole thing even after they start going out, while Manami is practically exploding with adoration for him.
* OfficialCouple: with [[spoiler: Kirino...temporarily]]
* RedOniBlueOni - The blue to Kirino's red.
* SecretKeeper - For Kirino's hobby.

* {{Tsundere}} - Just like his sister. Just look at the series title...

* UnreliableNarrator - Part of the reason Kirino is generally more lovable in the novels is because Kyousuke is giving a biased account of her, edited through the filter of his initial dislike and denial of her and her feelings. On the other hand, the manga also shows Kirino to be very vulnerable and awkward at times, which Kyosuke also can't perceive.
* VitriolicBestBuds - His relationship with Kouhei fits this trope to a T.

* ADayInTheLimelight - Two of the four net episodes focus on her, as is the case with volume five of the light novel, and episodes 7 & 8 of season 2.
* ArousedByTheirVoice - Kyousuke is a bit stimulated when he hears Kuroneko's voice in the vocal foley for a game they were making.

* ClingyJealousGirl - It doesn't come up in the anime during the first season, but Kuroneko is very possessive of Kyousuke. In the VisualNovel, she mocks Kyousuke when meeting him going out with Manami in that route, and [[GreenEyedMonster rats him out in a pretty cowardly fashion to Kirino in Ayase's route. She outright states she did the latter because of her jealousy.]]

* CosplayOtakuGirl - Almost all the time, except when she's in her school uniform or in [[spoiler:that white sundress she wears once she becomes Kyousuke's girlfriend]].
* ElegantGothicLolita - A combination of this, her hair and her body type make her look noticeably younger than Kirino even though Kuroneko is a year older.
* TheGadfly - Especially evident in Episode 11 of the anime, where she writes a manga with thinly-veiled expies of Kirino and Kyousuke just to get a reaction out of them.
* GreenEyedMonster - Kuroneko was the one who originally came up with the "lay a trap with Kyousuke's PornStash when Manami comes over" plan out of jealousy, although this is omitted from the anime. See also ClingyJealousGirl.

* ItsAllAboutMe - Like Kirino, she's not as selfish as she looks at first glance.
* LackOfEmpathy - She gets better.

* LonersAreFreaks - She doesn't get along well with her class, although Kyousuke keeps meddling to get her to socialize a bit more. It works.
* LoveTriangle - Kuroneko, Kyousuke and Kirino are the main love triangle. [[spoiler: She ends up going out with Kyousuke in Volume 8 of the LightNovel, only to break up with him at the end of summer. This is partly because she realizes that she likely can't win against Kirino in the end, as well as not wanting to hurt her friend (see [[http://www.baka-tsuki.org/project/index.php?title=File:Oreimo08_114.jpg this disturbing drawing in her journal lamenting that feeling]]). The end of the volume implies that she'd quite like to be together with both of them.]]
* PantyShot - Saori bluntly points out that Kyousuke might be getting quite a view from Kuroneko in the first scene of the VisualNovel, which serves as an introduction to the real time conversation system as he desperately tries to calm Kirino down. There's also a blink-and-you'll-miss-it one in Episode 13.
* [[spoiler: {{Polyamory}} - The end of Volume 8 implies she's in favor of this answer to the LoveTriangle problem. She blurts out that she's okay with Kirino and Kyousuke <censored>ing in volume 10.]]
* RedOniBlueOni - The blue to Kirino and Sena's red.
* [[spoiler:RelationshipUpgrade - Becomes Kyousuke's girlfriend in the eighth LightNovel and episodes 7 & 8 of season 2...then breaks up with him at the end of their summer vacation.]]
** [[spoiler:RomanticRunnerUp: And probably because of that, [[NiceJobBreakingItHero ended up bringing]] Kyousuke and Kirino even closer together than before. He ends up rejecting her in the OVA's for season 2, and while she ultimately accepts it, she screams out in anguish and curses him too.]]
*** Debatable, since she actively trying to force Kirino to admit her feeling and making both siblings to be closer.
* SpinOff - Kuroneko has her own manga, ''Ore No Kouhai Ga Konna Ni Kawaii Wake Ga Nai'' (''My Underclassman Can't Be This Cute'').
* SugarAndIcePersonality - She is mostly cold to everyone, but can be very sweet towards Kyousuke, the object of her affection. This contrasts with Kirino's Tsundereism
* VitriolicBestBuds - With Kirino -- no matter how much either denies it -- and to a lesser extent, Sena.

* YamatoNadeshiko - When Kyousuke first meets her, he thinks that she has the appearance of a traditional Japanese beauty. Her personality, however, couldn't be further from this type.
* OlderThanTheyLook - Because of her fashion style and body type, Ruri looks younger than her peers and even characters younger than her, like Kirino and Ayase.

* ArrangedMarriage - In the PSP game, Saori is engaged by her parents to a 40(!) year old business heir who wants her to throw away her otaku hobby. The main plot driver of her route is Kyousuke getting her to stand up to her parents and fiance to defend her identity.
* [[spoiler:BeautifulAllAlong: In the anime, she can be seen very briefly without her glasses in the mirror in one episode. She is first seen fully without them in episode 3 of season 2, and is completely shocked by the fact that her friends caught her off-guard without them on when they attempted to visit her for a surprise birthday party. Kirino later mentions this trope to her.]]
* CatSmile - You'll see it in the manga and a few times during the anime.
* CoolBigSis - To Kirino and Kuroneko.
* CosplayOtakuGirl - She comes up with the idea of the maid party for Kyousuke to apologize for Kirino and Kuroneko planning the PornStash trap for Manami to find. The anime implies this was partly to have an excuse to dress herself and her friends in custom made maid outfits she ordered. Also, in the PSP game, she shows Kyousuke a stack of cosplay photos she took to try and "get the otaku urges out" of her in preparation for her ArrangedMarriage, including a {{Sarashi}} Bikini kind of outfit that makes Kyousuke do a SpitTake.

* HugeSchoolgirl - Subverted. She's a cheerful leader type with excellent social skills, defying any height complex and the socially inept otaku stereotype. Double Subverted in that [[spoiler: she actually is cripplingly shy; the otaku persona is a coping mechanism with which she practices the only real social skills she knows. The first meeting she has in the series with Kuroneko, Kirino, and Kyosuke? That was her first time trying to make new friends, too.]]
* ItWasAGift - [[spoiler: Saori's glasses, and really her whole otaku persona, were borrowed from Kanako's older sister Kanata, who Saori admired and introduced her to anime and manga.]]

* NiceGirl - A kind and friendly ray of sunshine who can be friends with anybody, and does not hold grudges towards those who are judgemental of the anime community.
* [[spoiler:TheOjou]]
* OpaqueNerdGlasses - [[InvokedTrope Invoke]] to give an {{otaku}} image. Turns out those glasses were [[spoiler:given to her by a friend.]]
* OtakuSurrogate - Even plays up the part by wearing stereotypical Otaku clothes.

* [[spoiler: PlatonicLifePartners]]: She's the only one of the main girls that [[spoiler: doesn't fall in love with Kyousuke]]. Averted in the visual novel if you play her route though.
* PlayingAgainstType - After a decade of playing emotionally-reserved and dead-serious warriors like Kanu Unchou of ''Ikki Tousen'', Creator/HitomiNabatame finally sinks her teeth into a bright and upbeat role like Saori.

* [[spoiler:SecretlyWealthy]]
* ShipperOnDeck - For Kyousuke and [[spoiler:Kuroneko]].
* [[spoiler:ShrinkingViolet: She used to be one. In her first meeting of her sister Kaori's friends, as seen in episode 3 of season 2, she hides her face behind her hands when she first introduces herself to them. She gradually grows out of this trope over time.]]
* TeamMom - Again to Kirino and Kuroneko, both in the forums and in the outside world.
* TheyDo - In the best ending of her VisualNovel route, she marries Kyousuke while they're still in high school due to her parent's prodding. This is pretty abrupt since, unlike the other routes ending in marriage, before the last scene their relationship isn't treated as definitively romantic at all.
* VerbalTic - Usually ends her sentences with "De gozaru". In general, [[YeOldeButcheredEnglish she talks in the way an otaku would think a ninja would talk.]]

* BabiesEverAfter - Manami's best ending in the PSP game has her giving Kyousuke some nice tea after they're married, and nonchalantly telling him that she's pregnant. Kyousuke's reaction is excited happiness, to say the least.
* BewareTheNiceOnes - It's hard to tick her off, but she's apparently very scary when she is angry. So scary even Kyousuke cringed at the ''possibility'' of angering her in the eight light novel. [[spoiler:She's also the main reason Kirino and Kyousuke have such a bad relationship]]

* [[spoiler: BigBad: The main problem for a while was Kirino and Kyousuke's strained relationship, Manami started that strained relationship, do the math.]]

* ChildhoodFriendRomance - [[spoiler:Hasn't worked out so far in the novels, but she's an option in the PSP VisualNovel.]]

* DerailingLoveInterests: [[spoiler: Near the end, it is revealed that she destroyed the Kousaka siblings' relationship years ago out of jealousy. On top of that, she dragged Kyosuke down to become lazy and apathetic, so he wouldn't be out of her league, by manipulating his self esteem and guilt over some accident during mountain trip.]] There was little to no indication that she was anything but that cute and plain childhood friend before this reveal.

* [[spoiler: FinalBoss]]: One part of the final episode is [[spoiler: a fight between her and Kirino]]. It's even called a [[spoiler: FinalBattle]] InUniverse.
* {{Foil}} - Manami is what Kirino is not: nice to Kyousuke, [[GenericCuteness plain]], and almost pathologically normal in every way. Kyousuke makes this comparison himself when she's first introduced. No wonder Kirino [[spoiler:(and eventually even Kuroneko)]] dislikes her.
* GenericCuteness - She's not considered that good-looking InUniverse, but through this trope she looks about as cute as the other girls, odd haircut notwithstanding.
* InSeriesNickname - Kuroneko calls her [[http://en.wikipedia.org/wiki/Belphegor "Belphegor"]] even before actually meeting her, based on Kirino's stories that she's a seductress underneath that sweet exterior.
* [[spoiler: IWantMyBelovedToBeHappy: She seems to be an UnluckyChildhoodFriend towards him, and seems okay with him dating other girls.]]
* [[spoiler: JerkassHasAPoint: Her criticism of Kyousuke's relationship with Kirino was brutal and her fight with Kirino may have gone too far, but she had a valid point when she told them of how difficult it'd be to have an incestuous relationship. Kyousuke even acknowledges that she's right, but goes for it anyway.]]

* MoralityPet - Towards Ayase. In the Light Novel, Ayase's {{Yandere}} tendencies usually goes away by talking to Manami.
* NiceGirl - [[spoiler:Subverted in Volume 11]]
** [[spoiler:Persuading Kirino that her feelings of admiration towards Kyousuke were unnatural, and convincing Kyousuke that the reason for his troubles was his exuberance, and that he'd be happy living a life of {{Dismotivation}}, basically [[TheDogWasTheMastermind creating the Kousaka Cold War]]; Jesus, Manami!]]
* OddFriendship - She became friends with Ayase at some point. In the anime, she claims that she ran into Ayase a few times in various places after he introduced them in an earlier episode.
* OutOfFocus - She becomes less and less prominent in the later novels and most of season 2.
* SheCleansUpNicely - An [[WhatIf If]] route shows her becoming an idol with a different hairstyle and no glasses, and she arguably looks as cute as the girls who are professional models. Of course, GenericCuteness may be in effect here.
* ShipperOnDeck - [[spoiler:She tells Kyousuke to go after Ayase in the eighth volume of the light novel.]]

* TurnTheOtherCheek - She takes the jealousy-motivated rudeness from Kirino and Kuroneko in stride and doesn't even seem cross with them. [[spoiler:However, unlike everyone else whom they've told about their relationship, in episode 16 of season 2, she does avert this trope and attacks Kirino when the latter taunts her repeatedly about having "stolen" away Kyousuke.]]

* YamatoNadeshiko - As far as her personality goes, she's probably the closest girl in the show to the ideal Japanese wife.

* [[spoiler: AnguishedDeclarationOfLove: to Kyousuke in episode 12 of season 2 of the anime]]
* BabiesEverAfter - Only a possible ending with Kyousuke in the PSP game, so it's not even remotely canon. Nevertheless, it caused '' quite'' a stir when it was leaked before the game's release.
* BitchInSheepsClothing - How she seems to act towards Kyousuke most of the time, partly because of him "corrupting" Kirino, and partly because he often teases her, such as jokingly asking her to marry him, which she uses against him a couple of times in the later novels. She does eventually utilize this trope less and less however.

* BrokenPedestal - How she saw Kyousuke after he sacrificed his dignity and claimed he is "corrupting" Kirino. Still that does not stop her from approaching him whenever she needs help concerning Kirino.
* CharacterDevelopment - Part of her DefrostingIceQueen route. As time passed on, she became more accepting of Kirino's hobby and even tried to think of ways to connect to her through that. She also warmed up to Kyousuke over time in the form of BelligerentSexualTension [[spoiler: which culminated in a LoveConfession.]]
* ClingyJealousGirl - In volume 10/episode 11 of season 2, she visits Kyousuke in his apartment early in the morning. Kuroneko arrives shortly afterwards, and both girls butt heads a bit as to why the other girl is visiting him so early, and at all for that matter. Ayase claims that since they broke up, Kuroneko shouldn't even be visiting "onii-san". But Kuroneko wonders what kind of relationship Ayase has with him, since she treats him like dirt.

* DistantFinale - Her (in)famous BabiesEverAfter ending takes place an unspecified amount of time after the main story, but Kirino has been modelling professionally in Europe for at least a few years and freaks out over the prospect of being an aunt since that means she's getting older.

* DefrostingIceQueen - Towards Kyousuke in the Visual Novel as well as the light novel and season 2 of the anime. [[spoiler:She actually gets mad at him for "lying" about wanting to marry her in the Light Novel and season 2. This plot thread gets expanded to a full relationship in the Visual Novel.]]
* InSeriesNickname -

* MoralGuardian - Ayase basically plays this role for the show over the subject of eroge. She does, however, start to loosen up and contacts Kyousuke to get Kirino the best gift she can (which would naturally be otaku-related).
* OddFriendship - She became good friends with Manami at some point during Kirino's stay in America.
* OnlySixFaces - She looks quite similar to Kirino doesn't she? Even her hairstyle is almost the same.
** FridgeBrilliance - they're models, it would make sense that they would be chosen for that kind of appearance and hairstyle.
* {{Tsundere}} - Ayase turns from a YamatoNadeshiko type, to a {{Yandere}}, to this by volume 10.
* UnprovokedPervertPayback - The epic kicks she gives Kyousuke sort of fits into this category. Unlike his relationship with any other girl, though, Kyousuke actively flirts with Ayase any chance he can get in the LightNovel and VisualNovel, so this may not be so unprovoked.
* VitriolicBestBuds - With Kyousuke after he fools her into thinking that he is "corrupting" Kirino. There are indications that the reason she still talks to him is because she doesn't ''really'' believe his story, but accepted it anyway to stay friends with Kirino. She confirms this in the PSP VisualNovel.
* {{Yandere}} -

* YamatoNadeshiko - She grows into, well, a full time version of her "nice girl mode" in her PSP route's DistantFinale.

* BigBrotherAttraction

* BrutalHonesty - She's both blunt in her honesty sometimes but very dishonest at other times, especially when it comes to her affection.
* CatchPhrase - ''Kimo'' (basically a juvenile way of saying "gross!") and ''Saiaku'' (in context, "you're the worst").
* CharacterExaggeration - The anime greatly ups her [[{{Tsundere}} tsuntsun]].

* ClingyJealousGirl - Kirino tends to get a bit snippy if Kyousuke's been spending a lot of time without her, especially if she knows it's with another girl.

* ClosetOtaku - Finding people to talk to about her hobby is what kicks off and drives the plot for the first few volumes.
* CryCute

* CuteAndPsycho - In a hidden route of the PSP VisualNovel, Kyousuke and Kouhei discover an 8-bit shrine under their hotel in Kyoto. Akagi wishes on the shrine that they're never separated from their little sisters for the rest of their lives, and as a result Kirino turns scarily overprotective, getting the Ayase-style [[NightmareFace murder eyes]], forbidding Kyousuke from meeting or mentioning anyone besides her and then gripping him so hard she breaks his arm right at the end.

* DefrostingIceQueen - Towards Kyousuke. Kirino is the somewhat rare {{Tsundere}} that fits both the original and the modern definition.
* {{Eroge}} - Plays these as part of the PeripheryDemographic of LittleSisterHeroine games.
* [[spoiler:FalseStart - Kirino says ''something'' that's drowned out by the crowd noise at the end of volume 9. Whether it's just a thank you or a confession is left unresolved, but Kyousuke seems to have gotten the message.]]

* HairColors - Her hair is explicitly stated to have been dyed that color right at the start of the light novels.

* HardWorkHardlyWorks - Completely averted. Kyousuke notes that Kirino is not really talented at running, but she makes up for that by training really, really hard. [[spoiler:Unfortunately, this falls apart when she is pitted against people who both trains equally hard ''and'' are really talented.]]
* ItsAllAboutMe - Kirino starts out like this, but improves greatly over the course of the story. It's implied later on that she acted like this earlier to hide her embarrassment in typical {{Tsundere}} fashion.
* [[spoiler:IWantMyBelovedToBeHappy - After the incident with Kyousuke telling her he doesn't want her dating other guys, she was about to tell him the same when she found out Kuroneko was about to confess to him. She decides that being jealous is better than Kyousuke being sad and denying her best friend a shot at happiness, especially knowing how shy Kuroneko really is.]]
* JerkWithAHeartOfGold - The {{Jerkass}} factor is cranked UpToEleven in the anime; otherwise she's more balanced between being mean and nice in all other adaptations; all versions, though, undergo CharacterDevelopment that helps bring out her better personality traits.
* LackOfEmpathy - Although even anime Kirino seems to get some eventually, as shown in Episode 9 when she plays an eroge and finds herself in Kyousuke's shoes. This is explicitly pointed out in the DVDCommentary and expanded on in the PSP VisualNovel.

* [[spoiler: TheAce: Resembled one of these three years ago with good grades, a good athletic people and an overzealous enthusiasm for helping people.]]

* DerailingLoveInterests: [[spoiler: Near the end, it is revealed that she destroyed Kirino and Kyosuke relationship years ago out of jealousy. On top of that, she dragged Kyosuke down to become lazy and apathetic, so he wouldn't be out of her league, by manipulating his self esteem and guilt over some accident during mountain trip.]] There was little to none indication that she was anything that cute and plain childhood friend before this reveal.
** [[spoiler: The novel made it unclear in this matter. She didn't destroy Kirino and Kyousuke's relationship, but when Kyousuke was very vulnerable due to his failure with Sakurai, she gave him some advices (unclear if she did it intentionally or not). And while those advices seemed good in her POV, Kyousuke interpreted them in a way that caused him to turn lazy, which in turn destroyed his relationship with Kirino.]]

->'''Voiced by:''' KanaHanazawa

->'''Voiced by:''' YukariTamura

* DerailingLoveInterests: [[spoiler: Near the end, it is revealed that she destroyed Kirino and Kyosuke relationship years ago out of jealousy. On top of that, she dragged Kyosuke down to become lazy and apathetic, so he wouldn't be out of her league, by manipulating his self esteem and guilt over some accident during mountain trip.]] There was little to none indication that she was anything that cute and plain childhood friend before this reveal. Its almost as if creator wanted final rival to Kirino's Imouto be Osanajimi, and [[CharacterDerailment made her into]] [[BitchInSheepsClothing bitch]] so Kirino look better in comparison and win. Authors effort somewhat fails, as in PSP game she is rather amiable about [[spoiler: Kirino and Kyosuke going out]], and even in anime where she gets hit worst with derailment, she doesn't snitch on sibling to their parents. Plus the fact that when she did [[spoiler: whole manipulation thing, she was about ten years old, not exactly age at which people are most known for their commitment to personal integrity. There is no indication she ever abused his trust after that one time,]] which at worst would mean she matured long before series proper started.

* DerailingLoveInterests: [[spoiler: Near the end, it is revealed that she destroyed Kirino and Kyosuke relationship years ago out of jealousy. On top of that, she dragged Kyosuke down to become lazy and apathetic, so he wouldn't be out of her league, by manipulating his guilt and self esteem.]] There was little to none indication that she was anything that cute and plain childhood friend before reveal. Its almost as if creator wanted rival to Kirinos Imouto be Osanajimi, and [[CharacterDerailment made her into]] [[BitchInSheepsClothing bitch]]. Authors effort somewhat fails, as in PSP game she is rather amiable about [[spoiler: Kirino and Kyosuke going out]], and even in anime where she gets hit worst with derailment, she doesn't snitch on sibling to their parents. Plus the fact that when she did [[spoiler: whole manipulation thing, she was about ten years old, not exactly age at which people are most known for their commitment to personal integrity.]]

->'''Voiced by:''' HitomiNabatame

* PlayingAgainstType - After a decade of playing emotionally-reserved and dead-serious warriors like Kanu Unchou of ''Ikki Tousen'', HitomiNabatame finally sinks her teeth into a bright and upbeat role like Saori.

->'''Voiced by:''' SatomiSato

-> '''Voiced by:''' KanaHanazawa

** [[spoiler:RomanticRunnerUp: And probably because of that,[[NiceJobBreakingItHero ended up bringing]] Kyousuke and Kirino even closer together than before. He ends up rejecting her in the OVA's for season 2, and while she ultimately accepts it, she screams out in anguish and curses him too.]]

* OddFriendship - She more or less befriends Bridget, the blonde girl she beat during the Meruru cosplay contest (who didn't have a very good impression of her offstage). At one point Kanako protects her against an older man who seemed to be getting a little too frisky with her, only to find out that it was her father, but Bridget nevertheless appreciated the thoughts behind Kanako's attack.

* OnlySaneMan: Of the Gokou sisters.

14-year-old [later 15] Kirino, the titular ''[[LittleSisterHeroine imouto]]'' (little sister), is a model student with excellent grades, competent athletic skill and great popularity. On the other hand, she's also an {{otaku}} with a fetish for {{Little Sister Heroine}} {{eroge}}. Kyousuke discovering her double life is what starts their first serious interaction in years. Eventually, Kirino opens up her otaku personality more thanks to her brother and gains friends in that world.

* [[spoiler: FinalBoss]]: One part of the final episode is [[spoiler: a fight between her and Kirino]]. It's even called a [[spoiler: FinalBattle]].

* [[spoiler: FinalBoss]]: It's even called a [[spoiler: FinalBattle]] in the last episode.