History BigBrotherInstinct / AnimeAndManga

* In ''Anime/MagicalGirlLyricalNanoha'', Cinque of the Numbers is quite protective of her younger sisters, staying behind to fight Subaru (who is in the middle of a terrifying berserker rage brought on by the Numbers hurting her own sister Ginga) and getting badly injured in the process to allow Nove and Wendi to escape. Even though her crimes are more severe than the other Numbers and she does not expect to ever be completely free, she decides to atone for them and cooperate with the investigation so she can help her younger sisters.

* Kenshiro from ''Manga/HokutoNoKen''. While usually brooding and serious, one of the few things that makes him genuinely crack a smile is being around Bat and Lin. ''Hurt or threaten'' Bat and Lin and, well, YouAreAlreadyDead.

* Ayumu of ''LightNovel/KoreWaZombieDesuKa'' tries his best to get Eucliwood to call him "big brother," but the closest he comes is being called her "manservant."

One of Ichigo's biggest irritations is an older brother harming his younger sister. He gave us the page quote. In the Hell verse movie, when Yuzu dies, Ichigo flips completely until Renji stops him. In the Hueco Mundo arc, Ichigo comes across [[PluckyGirl Nel]], and his constant protection of her eventually leads to her trying to protect him back. When an ArcVillain messes with his little sisters, Ichigo eventually contemplates murder to save them.

* In ''Manga/{{Bleach}}'', one of Ichigo's biggest {{Berserk Button}}s is an older brother harming his younger sister. He gave us the page quote.
** In back story of Sora, Orihime's older brother,, he ran away with her from their abusive parents when she was three as soon as he turned eighteen, and proceeded to raise her on his own before being killed in an accident shortly before the beginning of the series. He also gave her the hairclips that she wears every day, and when his soul falls to [[TheCorruption hollowfication]], his devotion to her almost causes him to murder her in his insanity until Ichigo snaps him back to his senses, after which he immediately [[DyingAsYourself stabs himself]] with Ichigo's sword to ensure that he won't go crazy and try to kill his sister again.
** [[spoiler:Ichigo has no problem suggesting murder if you mess with his little sisters.]]
*** In the Hell Verse movie, when Yuzu dies, Ichigo's Berserk Button is broken in the On position until Renji stops him.
** And in the Hueco Mundo arc, Ichigo comes across [[PluckyGirl Nel]], and they seem to form kind of a BadassAndChildDuo.
** And although it took a while, previously very-AloofBigBrother Byakuya Kuchiki has now demonstrated a willingness to kick huge amounts of ass in defense of his sister Rukia.
** Omaeda is also surprisingly this, believe it or not, towards his baby sister Mareyo. He utterly ''flips'' when [[spoiler: a Quincy invader impales her to get him to spill the beans on his captain. Sadly, it doesn't go as well as Byakuya's did.]]

* Of the few redeeming traits of Ryo Narushima in ''{{Shamo}}'' is his protectiveness towards his younger sister.

* Inverted in ''Manga/KoeNoKatachi''. Shouko's little sister is heavily overprotective of her. Yuzuru outright invokes a RelativeError and [[{{bifauxnen}} pretends to be Shouko's boyfriend]], despite how illogical it is for a seventeen year old to date a middle schooler.

* Cocoa from ''Manga/GochuumonWaUsagiDesuKa'' considers Chino to be her surrogate little sister, much to the latter's annoyance. Later on customers to the cafe she works [[LampshadeHanging says she has a "sister complex."]]

* ''Anime/SoukouNoStrain''. After Ralph Werec has his FreakOut in the backstory (brought about by [[spoiler: unknowingly brutally killing a bunch of aliens who look and act like little girls]]) he views the only survivor of the aliens as a substitute little sister, and is more than willing [[KnightTemplar to do anything to avenge her race]], and I mean ''[[KillAllHumans anything]]'', to the point of wanting to kill his actual younger sister when she stands in his way.

* ''Manga/TheDaughterOfTwentyFaces'': The relationship between Ken and Chiko becomes this very quickly. It's so blatant that several characters, including Ken himself, [[LampshadeHanging hang a lampshade]] on the fact.
* In ''Manga/ThePrinceOfTennis'', if you mistreat Yuuta Fuji in almost ''any'' way, get ready to face his older brother Shuusuke's rage. Just watch and compare Fuji's matches with [[GeniusDitz Jiroh Akutagawa]] and [[TroubledButCute Ryoma Echizen]] ([[spoiler: both of them defeated Yuuta but did so ''fairly'', so Fuji holds no grudges and considers Echizen a friend]]) with the one against [[AlwaysCamp Hajime Mizuki]] ([[spoiler: who tricked Yuuta into using a [[DeadlyUpgrade very dangerous tennis move]] without telling him the consequences, so Fuji let Mizuki lead the game for a while and then absolutely trashed and traumatized him in-game]]). No wonder Fujicest is [[YaoiGuys among the most popular yaoi pairings]] in the fandom. Also, lampshaded in the anime when Fuji aids a girl with similar problems towards her older sister.
* ''{{Trigun}}'': Knives is this way about Vash, but it's a ''really'' dark version, since Knives thinks that Vash's [[WideEyedIdealist idealism]] and [[ThouShaltNotKill pacifism]] aren't doing him any good, and need to be beaten out of him.

* In ''Anime/TrueTears'' Jun displays this kind of attitude toward Noe, his younger sister. Hiromi even comments on it. In fact, [[spoiler: he seems to be rooting for a romantic involvement with her, making it a case of BrotherSisterIncest even if it is one sided and never actually accomplished]].

* ''Manga/Challengers'': Souichi is fiercely protective of his younger brother Tomoe (as well as homophobic) and will not hesitate to pummel Kurokawa when he shows an overt romantic interest in Tomoe.

* ''Anime/JungleWaItsumoHaleNochiGuu'': Haré has a big brother instinct towards his frequently irresponsible ''mother''. Guu teases him about his "Mazacon" (mother complex) from time to time.

** Kinkaku seems to be this. He and his brother, Ginkaku, are infamous among Kumogakure. They fight as a team, and work well together. One another's name being their most used words. When Ginkaku is backed into a corner, he calls for his brother to help him. But he doesn't make it. In response to his brother's defeat, Kinkaku goes into rage [[spoiler: and enters six-tailed bijuu mode and rampages through the first division of the shinobi alliance.]] His first words [[spoiler: after transforming]] is "How dare you do that to Ginkaku." Darui apologizes to Kinkaku, but the latter just says it's too late. The two brothers, if not half-siblings are fraternal twins. Their ages are the same, but birthdays are one month apart, with Kinkaku's being in March, and Ginkaku in April. it's accepted by fandom that Kinkaku is the older brother. He is also bigger. And Ginkaku, given his calling on Kinkaku for help, seems to show certain reliance on his brother. And Kinkaku, given his reaction looks out for his brother and can't stand for him to be harmed. Kakuzu even stating he hasn't seen Kinkaku that pissed in a while, and concludes it must mean Ginkaku has been defeated.
** Kankuro is a more positive example. Although he and Gaara have a poor relationship at first, the brothers become much closer after Gaara's HeelFaceTurn, and Kankuro willingly risks his life to go after Gaara when the latter is kidnapped by Sasori and Deidara -- although it doesn't end well for either of them -- and stands up for Gaara when an elder badmouths him. Considering how terrified he was of Gaara in Part 1 (and with good reason!), this is quite a change and shows just how much Gaara's change in circumstances has affected the family dynamic.

* {{LightNovel/Durarara}}'s Shizuo Heiwajima is rather protective of his little brother Kasuka (aka TeenIdol Yuuhei Hanejima). The mere act of namedropping Kasuka is enough to make him suspicious of your intentions, while insulting him or attempting to poke into his personal life results in an instant UnstoppableRage. In the LightNovels, he eventually goes on to develop another Big Brother Instinct towards a young [[TheRunaway runaway]] [[MafiaPrincess Yakuza Princess]].

* In ''GetterRobo: Armageddon'', Go immediately adopts this attitude towards Kei upon encountering her. It's eventually revealed that the reason for this is that [[spoiler:he ''is'' her older brother -- or rather a ([[OppositeSexClone male]]) memory-retaining clone of her older ''sister'', Michiru, who died when Kei was a little girl... known as Genki Saotome. Sort of]]. It's complicated.

** Though he's still nothing compared to Orihime's brother, Sora. He's ''really'' possessive of his sister, ''even after death''. He is shown to have become extremely jealous that Orihime spend more time with her best friend Tatsuki than praying for him, and to put it in his words, "I wanted you to pray for me, because only during the time you were praying for me your heart was mine."
*** And in his back story, he ran away with a three year old Orihime from their abusive parents as soon as he turned eighteen, and proceeded to raise her on his own before being killed in an accident.

* Shido Itsuka from ''LightNovel/DateALive'' toward his actual little sisters [[NotBloodSiblings Kotori]] and [[LongLostRelative Mana]]. His protective instincts toward the [[OurSpiritsAreDifferent Spirits]] in general could count as this combined with {{TheDulcineaEffect}}
* Brock from ''Anime/{{Pokemon}}'' takes care of nine siblings when his parents hit the road.
** Practically every Pokemon on Ash's team was this to Togepi.
** Clemont in the XY series; [[PromotedToParent he takes care of his younger sister Bonnie]] and even protects from her danger.
* Kenshiro from ''HokutoNoKen''. While usually brooding and serious, one of the few things that makes him genuinely crack a smile is being around Bat and Lin. ''Hurt or threaten'' Bat and Lin and, well, YouAreAlreadyDead.
** Rei's initial motivation for fighting was a pure case of this as well -- his little sister Airi was kidnapped by Jagi on her wedding day and sold into slavery.
* Narumi of KarakuriCircus, in spades. Masaru begins to mimic him.
* Guy Shishioh in ''GaoGaiGar''. Just hurt or threaten Mamoru in front of him and start counting how long it takes for him to wipe the floor with you. Mamoru even calls him "Big Bro."

* Kyon from ''SuzumiyaHaruhi'' set himself up as a {{Stoic}} in the novels for ages. Being the UnreliableNarrator that he is, we can all see that he's NotSoStoic. Still, he was just annoyed when Haruhi grabs him by the collar and slams the back of his head onto her table and it was mainly because she disrupted the class.
** During the filming of their [[SoBadItsGood amateur, plotless movie]], Haruhi gets Mikuru to drink alcohol, trying to get a certain effect out of her. He almost attacks Haruhi. Let us repeat. He almost attacks a reality-warping goddess.
** In the Disappearance novel/film, he even threatens Yuki's creator, the Data Integration Thought Entity. After the universe is rewritten where everyone was just normal, if somewhat peculiar humans, Kyon goes to great lengths to restore it to normal. After learning about Yuki's role in this, he tells her to let her boss know if it punished her for her actions [[spoiler:triggered potentially by her boredom of having to relive the same 2 weeks of summer vacation over 15,000 times during the Endless Eight arc]], he would tell Haruhi everything he knew, and make her believe him [[spoiler:with the trump card "I am John Smith", the person a young Haruhi met when her powers first awakened, who turned out to be Kyon. He said they would recreate the universe where Yuki existed but the Thought Entity didn't]]. Said threat worked, and for the moment Yuki didn't receive any punishment.
** In the 7th book, Mikuru is kidnapped. Kyon flies into a rage (for the second time in the novels), and immediately calls up Haruhi for help, forgetting she still doesn't know she's a RealityWarper. He claims it was a failed practical joke to cover up.
** In the 10th novel after [[spoiler: Yuki is incapacitated by the Sky Canopy Domain]] Kyon completely loses it and runs out to track down Kuyo Suou and personally make her fix it. To reiterate, he actually went out of his way to get into a confrontation with an alien interface who he ''knows'' has god-like powers. Naturally, he's out-classed but it's the thought that counts.
** In the fanfic Fanfic/KyonBigDamnHero, this gets turned {{up to eleven}}. Kyon will get violent if you threaten any [[strike:of the weaker]] brigade members.
* Mai Tokiha from ''MaiHime'' has a Big Sister Instinct towards her kid brother Takumi.
* Also another one for the Big Sister side is Orimura Chifuyu from LightNovel/{{Infinite Stratos}}. She may smack Ichika around alot but don't let that fool you. She dipped out on a world-class tournament championship match to find him after he was kidnapped and has harbored a grudge against that same organization years down the line. And although she doesn't use an IS herself anymore [[spoiler:(for now)]], it is widely known that she is the line in the sand that should not be crossed, as Ichika's BattleHarem knows fully well.
** Inverted with Ichika as he wants to become a pilot strong enough to protect her in return. He flies into a ''rage'' when a rogue IS program copies his sister's signature sword attacks and uses it on him.
* ''[[KyoshiroToTowaNoSora Shattered Angels]]'': Kyoshiro and Kazuya. It's a bad one too; people die. Quite a few people, actually.
** A much straighter example would be Tsubasa and Souma in ''KannazukiNoMiko'': the entire conflict between them stems from Tsubasa's desire to protect Souma as effectively as possible, which unfortunately involves pulling him to TheDarkSide and killing his love interest. [[spoiler:Towards the end, however, Tsubasa recognizes that Souma has wishes, too, and helps him to reach ''his'' goals.]] Also, Tsubasa killed their father who beaten up Souma when were very young, which is why they were separated.
** Kaon for [[HugeGuyTinyGirl Tarlotte]].

* In ''Manga/CardcaptorSakura,'' Yukito jokes that, despite Touya's teasing of Sakura, he has a protective instinct when it counts, something he acts out, secretly aware of her MagicalGirl alter life.
** played straight or inverted (depending on whether he is oldest or not) Syaoran acts as this towards his cousin Meiling in the anime adaption. His treatment of Sakura evolves somewhat into this at first (even if it ultimately becomes [[OneTruePairing a somewhat different relation]] by the end of the series).
* Zigzagged in SaintSeiya, when Ikki beats the stuffing out of his younger brother but then turns around again and again for the rest of the 100+ episodes, to the point where the ReluctantWarrior younger brother getting hurt in a fight became a sure-fire way to summon Ikki from his lone wolf brooding cave, screaming bloody murder and mind rape (in anything not drawn straight from the original manga).
** [[SubvertedTrope Subverted]] and [[InvertedTrope Inverted]] in ''Manga/SaintSeiyaTheLostCanvas'', concerning [[spoiler:[[EvilTwin Aspros]] and [[TheUnfavorite Defteros]]]]. When they were young, [[spoiler:Aspros]] would go out of his way to protect [[spoiler:Defteros]] from bullies in the Sanctuary, and [[spoiler:Defteros]] became very determined to help [[spoiler:Aspros]] shine. However, [[spoiler:Aspros']] heart was tainted by [[spoiler:Youma]], and he grew so afraid and jealous of his younger brother that he tried [[BrainwashedAndCrazy to use him as a pawn]] in his scheme to kill the Pope. (Not that [[UsefulNotes/ThePope Pope]].) [[spoiler:Defteros]] ends up killing him and [[ItsAllMyFault blames himself for it]]. When [[spoiler:[[BackFromTheDead Aspros is brought back to life]] by Alone, Defteros]] is determined to restore him to his sanity [[HeroicSacrifice and sacrifices]] [[FusionDance himself to do so]]. After his "death", he still protects [[spoiler:Aspros]] from beyond the grave, by means of the [[spoiler:Gemini Cloth]].
* ''[[JungleWaItsumoHaleNochiGuu Haré+ Guu]]'': Haré has a big brother instinct towards his frequently irresponsible ''mother''. Guu teases him about his "Mazacon" (mother complex) from time to time.
* Averted and subverted ([[MindScrew naturally]]) in ''Anime/RevolutionaryGirlUtena'' with Nanami and her brother Touga. Whereas Nanami's big brother complex is extreme to the point that she is [[BrotherSisterIncest in love with him]], Touga couldn't care less about her well being. Enter Mitsuru, a fourth grader, who she uses as a whipping boy after he saves her. She sees him as her servant, and he is fond of her-in fact, Utena and the others suspect that Mitsuru has a crush on Nanami, but he reveals that he wants to protect her like a brother would, unlike Touga. During his [[DayInTheLimelight Black Rose duel episode]], this is mentioned in the form of him being sexually and emotionally confused. It's shown that his interactions with the teenage Nanami piqued his curiosity about being grown-up, so he reads books about "adult"-related topics.
** Subverted again (and to [[{{Squick}} a twisted level]]) with [[spoiler:Akio and Anthy. The former needs the latter to be the Rose Bride and forces her to suffer emotional and physical hardships such as [[ImpaledWithExtremePrejudice being impaled with a million swords]] every time Akio tries to open the Rose Gate, the end goal of the duels, and forcing her into sex on a weekly basis. By the end of the series, though, she decides to leave him at last after God knows how long, yet despite his protests, he doesn't pursue her.]]
** Subverted ([[OverlyLongGag again]]) and then played straight with Miki and Kozue. While he does protect his sister and genuinely care for her (unlike Touga), he projects the image of his [[UsedToBeASweetKid sister when she was younger]] onto Anthy, whereas because of a childhood incident, Kozue becomes something of an AttentionWhore to annoy Miki ([[BrotherSisterIncest and there is possibly another reason]]). Miki is oblivious of her reasoning until Kozue's Black Rose duel. Compared to the [[DysfunctionJunction rest of the student council (and the other duelists for that matter),]] though, Miki is more level-headed, and he realizes his mistake early enough to both move on and become the resident NiceGuy among the cast.
* Played straight in ''Anime/MawaruPenguindrum'' with the Takakura siblings. The whole plot is based on Shouma and Kanba trying to save Himari's life. [[spoiler: Even if she is not related to them by blood and just got taken in by the family.]]
** [[spoiler: Kanba deserves special mention since he not only has protective (and romantic) impulses towards Himari, but also sacrificed his position in the Natsume clan and later his life for his ''real'' sister, Masako, not just Himari.]]\\
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[[spoiler: The aforementioned]] Masako plays it ''super'' straight as well, as she has a little brother named Mario whom she's completely devoted to [[spoiler: and is her reason to take a DealWithTheDevil with BigBad Sanetoshi. (One that ''Kanba'' would take for Himari as well, one must add.)]]
* ''Manga/MahouSenseiNegima'':
** Ayaka claims to have an overdone big sister instinct which her friends and the viewer apparently [[{{Shotacon}} grossly misunderstand]].
** Asuna has a more genuine version, that occasionally threatens to [[StupidSexyFlanders misunderstand itself]].
** Kaede also feels this way towards both Negi and Kotaro: A LoveChart produced in-universe shows that her romantic feelings for Negi are fairly low, but her maternal score is off the scale, surpassing the quite motherly Chizuru (10), matching ''Evangeline'' (12) [[note]]May be due to being still in love with Negi's "late" father, wishing ''she'' was the one who bore the man's child(ren), et cetera.[[/note]], and topped ''only'' by Asuna (15). This doesn't always show mostly because of her laid-back personality.
* ''Manga/LoveHina'': Keitaro takes on a big brother role towards Shinobu early on, which does result in her developing an ongoing crush for him.
* ''Anime/YuGiOh'':
** Seto Kaiba. He's a total jerk to the main characters, but threaten, kidnap or harm Mokuba in anyway, and he will make you regret it.
** Jounouchi Katsuya is very protective of his little sister Shizuka. When she sends him a video message telling him about how she is slowly going blind, he sneaks into the Duelist Kingdom tournament that Yuugi was invited to so he could win the prize money and pay for an operation to save her eyesight. He also becomes extremely protective over her when Honda and Otogi begin flirting with her and competing openly for her attention.
** Ishizu is completely willing to die if it means saving her little brother, Malik, from his psychotic SplitPersonality. For that matter, so is his older step-brother Rashid.
* ''Manga/StrawberryMarshmallow'': Nobue is a female version, serving the protective role towards her 12-year-old sister and her friends. She also feels a near sensual pleasure watching them act cute, making her an easy victim of their manipulations.
* ''Manga/InuYasha'':
** For a short while, Kagura seemed to develop a big ''sister'' instinct toward Kohaku, until she [[spoiler: died for him.]]
** Sesshoumaru has a complex, evolving relationship with his brother [[TheHero Inuyasha]] [[spoiler: due to feeling like the [[TheUnfavorite victim]] of ParentalFavoritism]]. Prior to the story's start, it appears Sesshoumaru [[BigBrotherBully bullied]] and [[AloofBigBrother ignored]] Inuyasha for not being [[HalfHumanHybrid pure-blooded]] {{Youkai}}, and his first few story arcs revolve around Sesshoumaru's efforts to obtain the CoolSword that their father left for Inuyasha -- by [[CainAndAbel murdering Inuyasha]] if necessary. As the story progresses and Sesshoumaru's [[CharacterDevelopment character develops]], however, Sesshoumaru's motives become more ambiguous, taking on more of a flavour of "IWasJustPassingThrough" and "[[TheOnlyOneAllowedToDefeatYou Nobody kills my brother but me]]". The conflict between them is eventually resolved [[spoiler: when Sesshoumaru finally understands what their [[SinkOrSwimMentor father]] was [[ToughLove trying]] to [[CruelToBeKind teach]] him: no matter how strong Tessaiga makes Inuyasha, his half-human nature means he'll always need Sesshoumaru's strength and [[BigBrotherMentor support]].]] Although the exact nature of Sesshoumaru's protective instincts can be debated in one-or-two cases (notably Jaken [[spoiler: and Kagura]]), his instinct to protect expands throughout the series more-or-less as follows: [[TheIgor Jaken]] (who really doesn't [[BumblingSidekick feel the love]] most of the time), [[MoralityPet Rin]], [[TheOnlyOneAllowedToDefeatYou Inuyasha]], [[IWasJustPassingThrough Kagome]], [[spoiler: [[ImpliedLoveInterest Kagura]], [[ThePromise Kohaku]], until he's eventually openly protecting [[{{Protectorate}} both his group and Inuyasha's group together]].]] Sesshoumaru's development is finally [[LampshadeHanging lampshaded]] in the final chapter [[spoiler: when Kagome openly calls him ''onii-san'' (using the kanji for 'brother-in-law') and notices the [[NotSoDifferent disturbed expressions on both brothers' faces are identical]].]]

* ''GunslingerGirl'': Due to their conditioning, the titular girls are very focused on their grownup "handlers" -- who all happen to be male. On occasion this even turns into a form of puppy love, with the difference that [[SmallGirlBigGun the "puppies" know how to handle dangerous weapons]]... And, in the case of [[spoiler:Elsa]], blow your brains out as well as theirs in a murder/suicide if you [[WomanScorned ignore them too much]].
* In ''ThePrinceOfTennis'', if you mistreat Yuuta Fuji in almost ''any'' way, get ready to face his older brother Shuusuke's rage. Just watch and compare Fuji's matches with [[GeniusDitz Jiroh Akutagawa]] and [[TroubledButCute Ryoma Echizen]] ([[spoiler: both of them defeated Yuuta but did so ''fairly'', so Fuji holds no grudges and considers Echizen a friend]]) with the one against [[AlwaysCamp Hajime Mizuki]] ([[spoiler: who tricked Yuuta into using a [[DeadlyUpgrade very dangerous tennis move]] without telling him the consequences, so Fuji let Mizuki lead the game for a while and then absolutely trashed and traumatized him in-game]]). No wonder Fujicest is [[YaoiGuys among the most popular yaoi pairings]] in the fandom. Also, lampshaded in the anime when Fuji aids a girl with similar problems towards her older sister.
* ''LightNovel/SisterPrincess'' is nothing but this. To an [[TastesLikeDiabetes unhealthy extreme]], in fact.
* ''LightNovel/KyoKaraMaoh'': Shori has a certain obsession with protecting his younger brother at all costs.
** Gwendal is very protective of Wolfram, and at times Conrad, though it is hard to see at first due to his stern nature. Conrad is very protective of Wolfram and Yuuri. Though Yuuri is the king, so he should be protective, he is Yuuri's godfather, and thus often acts like an older brother/father figure.
*** Conrad seems to have had a genuine 'Big Brother Complex' over Wolfram when he was small. The transformative episode when, at a guess, Conrad was about forty (looked twelve) and Wolfram was about fifteen (looked three) in which Gwendal sorted out his relationship with Dan Hiri, Conrad lost his father, and Wolfram found out his favorite awesome brother was half human appears to have started the trend that terminated in his behavior at the beginning of the show: calling Gwendal as 'Aniue' and Conrad as 'Weller,' his surname. And once Wolfram rejected him, Conrad eventually moved on to obsess over someone else. With a period of cynicism in the middle, out of which ''Gunter'' knocked him by kicking his ass.
*** Will go even more on a tangent to say that Gunter and Conrad's abortive fight in the DaiShimaron arc was ''awesome''.
* ''NightHeadGenesis'': Naoto obsesses over Naoya, his kid brother who [[TheEmpath has empathic powers that render him mostly helpless]]
* In ''TrueTears'' Jun displays this kind of attitude toward Noe, his younger sister. Hiromi even comments on it. In fact, [[spoiler: he seems to be rooting for a romantic involvement with her, making it a case of BrotherSisterIncest even if it is one sided and never actually accomplished]]
* ''Manga/TheDaughterOfTwentyFaces'': The relationship between Ken and Chiko becomes this very quickly. It's so blatant that several characters, including Ken himself, [[LampshadeHanging hang a lampshade]] on the fact.

* In ''Manga/{{Bleach}}'', one of Ichigo's biggest {{Berserk Button}}s is an older brother harming his younger sister. He gave us the page quote.
** Though he's still nothing compared to Orihime's brother, Sora. He's ''really'' possessive of his sister, ''even after death''. He is shown to have become extremely jealous that Orihime spend more time with her best friend Tatsuki than praying for him, and to put it in his words, "I wanted you to pray for me, because only during the time you were praying for me your heart was mine."
*** And in his back story, he ran away with a three year old Orihime from their abusive parents as soon as he turned eighteen, and proceeded to raise her on his own before being killed in an accident.
** [[spoiler:Ichigo has no problem suggesting murder if you mess with his little sisters.]]
*** In the Hell Verse movie, when Yuzu dies, Ichigo's Berserk Button is broken in the On position until Renji stops him.
** And in the Hueco Mundo arc, Ichigo comes across [[PluckyGirl Nel]], and they seem to form kind of a BadassAndChildDuo.
** And although it took a while, previously very-AloofBigBrother Byakuya Kuchiki has now demonstrated a willingness to kick huge amounts of ass in defense of his sister Rukia.
** Omaeda is also surprisingly this, believe it or not, towards his baby sister Mareyo. He utterly ''flips'' when [[spoiler: a Quincy invader impales her to get him to spill the beans on his captain. Sadly, it doesn't go as well as Byakuya's did.]]
* ''[[Anime/MobileSuitGundam00 Gundam 00]]'': Mix this with BloodKnight and AxCrazy, and you have Michael Trinity.
** Mix this with SubordinateExcuse and ExtremeDoormat, and you have [[spoiler:Hong Long.]]
* ''[[Anime/AfterWarGundamX Gundam X]]'': Subverted with Shagia and Olba Frost. Not only the siblings in question are ''villains'' and brothers (instead of brother and sister), but the one who blindly adores and fiercely protects his sibling is Olba, the ''younger'' of the duo.
* ''Manga/AxisPowersHetalia'':
** [[MoeAnthropomorphism Switzerland]] is like this with his TokenMiniMoe sister Liechtenstein.
** South Italy hates his younger brother North Italy's [[HoYay ally]] Germany because he thinks he's not good for his sibling (and since both Germany ''and'' Romano are male {{Tsundere}}s.)
** According to WordOfGod, [[DeadpanSnarker Norway]] acts similarly towards Iceland. Confirmed in a strip, where Norway tries to make Iceland call him "Oniichan" (an honorific that usually little kids use towards their older brothers) and strangles Denmark with his own tie when he cracks jokes about it.
** In the Baltic area, the [[OnlySaneMan usually calm]] [[{{Meganekko}} Estonia]] can be reduced into a nervous wreck in regards to his younger brother of sorts, [[ShrinkingViolet Latvia]], and [[TheChewToy with good reason]]. [[SayMyName LATVIAAAAAA]], indeed.
** England also acted as an older brother figure to America, in his own way. The Revolutionary War thus broke his heart, and he still seems to have a soft spot for him ([[{{Tsundere}} not that he'd ever show it]]).
* ''{{Challengers}}'': Souichi is fiercely protective of his younger brother Tomoe (as well as homophobic) and will not hesitate to pummel Kurokawa when he shows an overt romantic interest in Tomoe.
* ''NaruTaru'': Female-female example: [[spoiler: ActionGirl Shiina has a MysteriousProtector in the form of one of the "Otohime" or "Virgin Princesses". It turns out that said protector is actually her dead older sister, Mishou, who was transformed and reincarnated into an Otohime after her death.]]
* ''{{Trigun}}'': Knives is this way about Vash, but it's a ''really'' dark version, since Knives thinks that Vash's [[WideEyedIdealist idealism]] and [[ThouShaltNotKill pacifism]] aren't doing him any good, and need to be beaten out of him.
** Incidentally, they're ''twins'', and no one was there to see them born. When Vash explains who Knives is in the anime, at least, he uses the absolutely-ambiguous word 'kyoudai,' 'sibling,' which carries neither gender nor age, because Japanese doesn't have a birth-order-ambiguous version of 'brother.' (The same word is applied to all their 'sister' bulb-plants in the manga. Confusingly, it's supposed to be an English-speaking planet.) Knives appointed himself big brother after becoming evil and deciding Vash was a wimp.
** Anime Knives always had Big Brother tendencies, but in the manga back when they were still cute ''Knives'' was the sensitive one, and Vash actually looked after him slightly more than the reverse.
*** I.e., pointing out that even if Knives is right and "there's no real difference between people's hearts and ours," it's going to take a lot of work, and comforting him when Knives starts crying after William Conrad, the first human they ever met besides Rem, accepted them.
*** Anime Vash interpreted Rem's last words, "Knives o--" [mouth forming three inaudible syllables] as "Take care of Knives," though the meaning of this appears to have shifted in his head to mean 'beat the shit out of Knives' by the time they meet in July.
* ''Manga/{{Basilisk}}'' has [[MasterOfDisguise Saemon Kisaragi]] and his younger sister, [[AmazonianBeauty Okoi]]. Even when Okoi is quite able to defend herself, all of the Koga Manjidani know that upsetting her is a ''bad'' idea not just because she'll punch them immediately, but because the ruthless Saemon will be NOT amused as well. [[spoiler: When Okoi dies ''very'' messily, Saemon throws all his possible reservations about the Iga/Koga showdown away and fights ''furiously'' and ''without any mercy'' (except to Hotarubi, and that's ONLY after he's fatally injured her) to avenge his dead sister.]]
* ''PeacemakerKurogane'': Tatsunosuke is overly protective of his younger brother Tetsunosuke. The other characters tease them both about this.
* ''Manga/FairyTail'': Mirajane and Elfman are a weird example of this: Elfman (technically the younger brother) is extremely protective of Mira, probably due to [[spoiler: their dead sister Lisanna, for whose death he blames himself]], [[BerserkButton flying into a rage when she's in danger]] and threatening anyone who flirts with her. However, Mira is also deeply protective of ''him'', and rightly so, considering that [[spoiler: she's about a million times more badass]].
* In ''FruitsBasket'', Momiji's little sister, [[DramaticIrony unaware of their relationship]], solicits this, asking Momiji if he will be like a big brother to her.
** Haru acts this way towards Kisa, including running through the rain to find her after she runs away and giving her the strawberries from his cake.
** While he has a lot to make up for, Ayame definitely cares deeply for his little brother. Since he spent his youth as an AloofBigBrother, he's trying to make up by being there when Yuki needs him. This comes into play when he attends a parent-teacher conference at Yuki's school instead of their abusive mother.
* In ''KashimashiGirlMeetsGirl'', [[{{Tsundere}} Tomari's]] [[SchoolgirlLesbians crush]] on her [[GenderBender formerly male]] best friend, Hazumu, comes out of her sisterly instinct to protect her. In the anime that protective side gets a bit less attention, though, and her feelings for Hazumu are presented more as a straightforward crush.
* ''{{Vocaloid}}''-- although technically all the canon Vocaloids are supposed to be siblings -- has Len Kagamine, who in vids is protective or over-protective of his sister, Rin, although Rin is supposed to be the older one.

* Subverted in ''Manga/DeathNote'' where VillainProtagonist Light Yagami in an early MotiveRant claims that part of the reason he wants to make a better world is to protect innocents like his little sister, Sayu, and he has a PetTheDog moment early on helping her with her homework, but [[spoiler: later in the series considers killing her when [[HostageForMacGuffin she becomes a hostage]] so that the source of his power doesn't fall into the hands of criminals (Though ultimately he doesn't).]]
** Early on, he suggests that he'd have to kill her if she found out about him being Kira.
** [[AlternateCharacterInterpretation It's possible]] that one of his first genuine reasons for killing off evil people was to make a better world for his family, but that changed as the Death Note began to affect him (and turned him into the crazy monster that he would become). This is backed up by his treatment of his family when he [[spoiler:lost his memories.]]
* In ''Manga/{{Naruto}}'', [[spoiler: Itachi Uchiha wanted his little brother Sasuke to be strong enough to be safe from [[BigBad Madara]].]] Shame he went about it in the most [[MindRape fucked up, traumatizing]], and [[NiceJobBreakingItHero ultimately futile]] way possible.
** Actually, according to the story we're told, his goal was to make Sasuke a hero of Konoha. The only way he'd be allowed to continue to live there after [[spoiler: the entire Uchiha Clan planned a rebellion. Itachi was supposed to kill all of them, but he couldn't make himself kill Sasuke. That's one for the "Nice Job Breaking Your Little Brother, Hero" category.]]
*** Let's put it this way: [[spoiler:Itachi was torn between the clan and the village, and ultimately chose the village. For the sake of his home, he willingly killed aunts, uncles, cousins, his lover, his father, and his mother...but he couldn't kill Sasuke. Because in the end, while Itachi may have loved Konoha more than his own clan's ambitions, he loved his little brother above everything else. This is shown in the ultimatum that Danzo gave him; either he died with his clan, or kill all of his clan, and they would spare the only child innocent of the Uchiha Clan's sins-Sasuke.]]
** Kankuro is a more positive example. Although he and Gaara have a poor relationship at first, the brothers become much closer after Gaara's HeelFaceTurn, and Kankuro willingly risks his life to go after Gaara when the latter is kidnapped by Sasori and Deidara -- although it doesn't end well for either of them -- and stands up for Gaara when an elder badmouths him. Considering how terrified he was of Gaara in Part 1 (and with good reason!), this is quite a change and shows just how much Gaara's change in circumstances has affected the family dynamic.
** [[DeadpanSnarker Neji]] develops this later for his cousin [[ShrinkingViolet Hinata]]. Taken UpToEleven in ''Manga/RockLeesSpringtimeOfYouth'', where the thought of Hinata going on a date with Naruto made him go on a psychotic rant at one point.
** A is very protective of B, choosing to sequester him in the village to train rather than risk him in combat missions.
* ''Anime/DarkerThanBlack'': There is a ''reason'' Hei goes [[BerserkButton completely nuts]] when his [[strike:Dead]] missing sister is brought up. [[spoiler:Namely, the reason he came to be a BadAss martial artist in the first place was to protect his Contractor sister. That's right, the normal sibling wanted to protect the one with superpowers. [[BadassNormal And did a pretty good job]] up until [[RealityIsOutToLunch Heaven's Gate]] somehow fused them.]] In the second season, [[spoiler:he starts treating Suou as a substitute little sister.]]
* Of the few redeeming traits of Ryo Narushima in ''{{Shamo}}'' is his protectiveness towards his younger sister.
* ''FushigiYuugi'' has Tamahome (towards his siblings, and [[RelationshipUpgrade initially, Miaka]], after she told him she missed her actual brother Keisuke) and Tasuki (towards Chiriko).

* ''GameXRush'' has this for his younger brother Memori, particularly when Memori was a younger crybaby.
* In ''Manga/{{Akira}}'', Kaneda feels this way towards Tetsuo, because they were friends since childhood. Even though he teases him, he still feels the need to protect him and shows affection for him as a younger brother.

* ''LightNovel/{{Baccano}}'' has two examples: Maiza, who serves as a sort of BigBrotherMentor to the young gangster Firo (who is supposedly somewhat similar to his biological younger brother, who [[spoiler: was murdered in a conflict over the Elixir of Life]]), and Dallas, an unrepentant JerkAss whose one redeeming trait is his kindness towards his little sister. The three Gandor brothers are also very protective of one another.
* Baskerville has this towards Mingchao in ''Manga/EtCetera.'' Partially because he's dealing with [[spoiler: his own little sister's death.]]
* In ''Manga/OnePiece'', Portgas D. Ace is very protective of his [[spoiler:adoptive]] little brother Luffy. This goes from [[spoiler:taking on Blackbeard to sacrificing his life against Akainu.]]
** Also Zoro to Chopper, who keep an eye out for the little guy and becomes upset when anyone hurts Chopper.
** The brotherly bond between himself, Luffy, and Ace is what Sabo valued the most. [[spoiler:In the present storyline, after revealing himself to be alive to his younger brother, Sabo makes it clear to his enemies that he would do anything to protect Luffy, especially after losing Ace.]]
* Kaiser Ryo for his younger brother Sho in ''Anime/YuGiOhGX'', at least [[FreakOut at]] [[FaceHeelTurn fi]][[KickTheDog rst]]. Saiou for his sister Mizuchi in Season 4. A strange case is Fubuki for Asuka, in that he both attempts to get her to date other guys and manages to convey BrotherSisterIncest undertones simultaneously. Regardless, he does care for her as a sister, but usually it's her that ends up saving him.
* In ''Anime/MagicalGirlLyricalNanoha'', Cinque of the Numbers is quite protective of her younger sisters, staying behind to fight Subaru (who is in the middle of a terrifying berserker rage brought on by the Numbers hurting her own sister Ginga) and getting badly injured in the process to allow Nove and Wendi to escape. Even though her crimes are more severe than the other Numbers and she does not expect to ever be completely free, she decides to atone for them and cooperate with the investigation so she can help her younger sisters.
* In ''Manga/YakitateJapan'' Kawachi does this to Azuma, due to Azuma having to worry about Kawachi. When Kawachi lost the battle with Kanmuri in the Pantasia Newcomer's Battle

* {{LightNovel/Durarara}}'s Shizuo Heiwajima is rather protective of his little brother Kasuka (aka TeenIdol Yuuhei Hanejima). The mere act of namedropping Kasuka is enough to make him suspicious of your intentions, while insulting him or attempting to poke into his personal life results in an instant UnstoppableRage. In the LightNovels, he eventually goes on to develop another Big Brother Instinct towards a young [[TheRunaway runaway]] [[MafiaPrincess Yakuza Princess]].
* In ''BinbouShimaiMonogatari'', Kyou has this toward her younger sister Asu, which is justified since [[ParentalAbandonment they live by themselves]] and she has taken on a parental role. Since Kyou is still very much a child herself this doesn't always come easy for her, but luckily Asu compensates by often acting very mature for her age.
* Fujimiya Ran in ''Anime/WeissKreuz'' goes so far as to take his little sister Aya's name after she's rendered comatose; he becomes an assassin primarily to pay her hospital bills, and not only is he fiercely devoted to her welfare, he displays knee-jerk protectiveness toward anyone who reminds him of her. This is most evident in his interaction with IdenticalStranger Tomoe Sakura, but it also flavors his behavior toward several other young women and makes him a BigBrotherMentor toward Sena in ''Gluhen'' and Yuki in ''Side B''.
* Toki from CodeBreaker is part of the Code Breaker group in order to keep his sister Nenene safe (though she's apparently older than him, and doesn't remember who he is).
* Ozma Lee from ''MacrossFrontier'' is '''extremely''' protective of his little sister Ranka, even though she's adopted. He even manages to break the [[Anime/SuperDimensionFortressMacross pineapple cake curse]] because he promised not to die so long as Ranka still needed him. Also played straight with [[spoiler:Brera Stern, Ranka's real brother]].
* Shannon Casull plays this trope straight in ScrappedPrincess [[spoiler: even if Pacifica isn't his biological sister.]] In fact most of his [[CrowningMomentofAwesome best moments]] this trope.
* Grumpy, cynical Sanzo in ''Manga/{{Saiyuki}}'' is this towards Goku, despite voicing his annoyance about Goku constantly. Hurting Goku is a [[PapaWolf whole different matter.]]
** Demon prince Kougaji cares deeply about his half-sister Lirin and would do anything for her.
** Gojyo's half-brother is this, despite being on opposite sides with Gojyo and feels tremendous guilt for not being able to protect him from the abuse of his mother. His extreme protectiveness over Kougaji is motivated by how he couldn't keep his biological half-brother safe and a way to gain redemption for not being able to. His complete psychological breakdown when he thinks he couldn't keep Kougaji safe reflects this.
* In Anime/TengenToppaGurrenLagann, Kamina has this towards Simon. Expressed elegantly with this line:
--> '''Kamina:''' Don't call me Kamina, call me bro!
* Inverted in ''RaveMaster'' where younger brother Haru is fiercely protective of his older sister Cattleya. He had once beaten up a guy who broke her heart and would have done it again when he ran into the guy later on in the series.
* ''SoukouNoStrain''. After Ralph Werec has his FreakOut in the backstory (brought about by [[spoiler: unknowingly brutally killing a bunch of aliens who look and act like little girls]]) he views the only survivor of the aliens as a substitute little sister, and is more than willing [[KnightTemplar to do anything to avenge her race]], and I mean ''[[KillAllHumans anything]]'', to the point of wanting to kill his actual younger sister when she stands in his way.
* In the ''WildSeries'', Kiri has a strong caring instinct for his little brother, Mao. Granted, it doesn't stop him from immediately trying to kill Mao when Mao [[ShapeshifterIdentityCrisis loses control of his beast side]], but he probably considered that a favor.
* In ''Anime/YuGiOh5Ds'' Crow shows this attitude towards; Leo, Luna, Yusei, Akiza, Jack and his younger siblings. To the point where he'd become the ''IdiotHero''
* Guache of TegamiBachi has this for his little sister, Sylvette. [[spoiler:Until he looses all of his memories, anyway.]]
* Maho from ''WanderingSon'' is an odd case, being both a [[BigBrotherBully Big Sister Bully]] and having a [[BigBrotherInstinct Big Sister Instinct]]. She usually acts bratty or moody but when her little sister is in trouble or insulted (even by her crush) she'll fight back.
* OuranHighSchoolHostClub plays with this with a few of its members, most notably in the episode where Nekozawa's little sister Kirimi wanders up to the high school, putting both Nekozawa and Tamaki in the big-brother spotlight in turn.
** In addition, Hunny and Mori have this relationship with their brothers Yasuchika and Satoshi (manga-only), though Hunny's way of showing it is admittedly...weird, to the point that the anime completely overlooked it.
** And Hikaru and Kaoru, being twins with a lot of identity issues to work out, go back and forth on treating each other this way. Usually Kaoru takes up this role while guiding Hikaru to maturity, but when he gets too self-sacrificing for his own good Hikaru will press his big-brother advantage to set him straight.
* Lin from ''SpiritedAway'' becomes quite protective over protagonist Chihiro over the course of the film.
--> '''Lin''': Don't worry... stay right where you are, I'm coming to get you! You're gonna be fine, I won't let him hurt you.
--> '''Lin''': No Face! If you put even one scratch on that girl, you're in big trouble!
* In ''SaintBeast'', Kira attacks anyone who so much as talks to his brother Maya initially. Considering the FantasticRacism they are usually subject to, this is somewhat justified, but it also scares off potential friends.
* Natsuki from ''{{tsuritama}}'' over his little sister Sakura, to the degree that she's one of the very few things that can crack through his grumpy demeanor and get him to smile. Haru saying to Sakura that Natsuki'll be teaching him and Yuki how to fish is the only reason Natsuki agrees to do it, just to keep her from feeling let down.
* In ''PersonaTrinitySoul'', Ryou used to be like this 10 years ago. After their family reunited he turned out to be [[spoiler:AloofBigBrother]]. His younger brother Shin also have this toward their youngest brother Jun. Shin is really worried about Jun, he really worried when Jun came back home 30 minutes late than usual, including [[spoiler:[[DatePeepers peeking]] him on his date]]. But it turns out [[spoiler:that it was not really a date]].
* In ''LightNovel/ACertainMagicalIndex'', this is Misaka Mikoto's reason for risking her life to save her 20,000 clones.
-->'''Mikoto:''' They are my sisters. It's because these little girls are my sisters. That's all there is to it.
** Accelerator has this dynamic going on with Last Order, although some interpret it as more of a father-daughter relationship.
* In ''AnatoliaStory'', Yuri initially mistakes a servant boy named Tito as her very young sister, who was lost when Yuri was kidnapped to the past. She quickly befriends Tito, and does ''not'' take it well when the queen tries to use him as a pawn to kill Yuri. When Tito is sentenced to execution for trying to kill Yuri (a member of the royal family by law, as she is disguised as Prince Kail's concubine) while BrainwashedAndCrazy, Yuri runs in, argues down the executioner, and finally convinces Kail himself to call it off. [[spoiler:When Tito is trapped in the queen's castle, after rescuing Yuri, she flies into a massive panic to have him rescued, openly accusing the queen of lying when the queen insists that she has no idea what happened. And when poor Tito shows up FlayedAlive, Yuri promptly declares vengeance on the hired grunt who did it, as well as on the queen for ordering it.]]
** Tito's sisters Hadi, Ryuhi and Shayla all share a Big Sister Instinct for him. When they learn aout his death and (wrongly) are told that it was entirely Yuri's fault, they immediately begin planning how to have Yuri ''killed'' to avenge him. Once Yuri's innocence is proved, the three pledge themselves to Yuri and redirect their loyalties to her.
** Hadi has this for her younger sisters as well as Yuri herself. When she finds out that [[spoiler:Kikkuri was sleeping with both of the twins and knocked one of them up, she coolly makes sure that he intends to look after ''both'' of her sisters]]. And at one point, when [[spoiler:Kail goes insane at the thought of Yuri leaving him and tries to rape her]], Hadi is too frightened to intervene... until Yuri specifically starts shouting her name, begging for help. At that point, Hadi works up the courage to [[spoiler:go into Kail's bedroom and beg him to stop and let Yuri go, even though Kail could easily order her to be harshly punished (if not executed) for it.]]
* In ''Manga/GakuenBabysitters'', Ryuuichi is well-known amongst his peers for having this toward Kotarou.
* Kurando from ''Manga/PopcornAvatar'' is very protective of his twin sister Mafuyu, to the point where people accuse him of being a massive siscon. Indeed, he could initially care less about Lisa's motivations for saving the world, but is willing to play along because saving the world means saving the place where his sister lives in.
* In ''Manga/BlueExorcist'' [[AntiAntiChrist Rin]] and [[BigLittleBrother Yukio]] play with this. Rin is certainly protective of Yukio, but that was mostly in childhood as Yukio is now [[BadassBookworm tough enough]] to handle himself most of the time. On the other hand ''Yukio'' is actually very protective of Rin and has sworn to protect him: but Rin is [[AlmightyJanitor badass]] enough on his own and [[spoiler: Yukio secretly [[TheResenter hates]] and [[GreenEyedMonster envies]] his "older" brother.]] Meanwhile Rin continues to support, and worry over Yukio, while dreaming of [[WellDoneSonGuy catching up]] to his brother so they can [[BashBrothers fight together]].
** It should noted that Rin and Yukio are twins.

* Sousuke is this to a male example, [[BrattyHalfPint Shino]], in Manga/HakkendenTouhouHakkenIbun. He is the protective, motherly kind. Examples of his behavior include draping his coat over Shino when he was cold and then letting him fall asleep in his lap, carrying him on his hip like a toddler, and overall just fretting over him. He disciplines Shino and never forgets to tell him to mind his manners and take care of his strength.
* In ''Manga/SakiAchigaHen'', among the Matsumi sisters, it's usually Kuro, the younger sister, protecting her older sister Yuu from bullies, who pick on her because she's sickly and dresses in thick clothing in summer. But when Kuro loses a lot of points in the quarter-finals, and breaks down in tears, Yuu goes to comfort her, and declares that it's her turn to fight and get back the points Kuro lost.
* ''Manga/AttackOnTitan'':
** Gender-flipped with Mikasa and her adoptive brother, Eren. She is fiercely protective of him, and he complains frequently about it.
** Both Eren and Mikasa display this tendency towards their [[NonActionGuy weaker]] friend, Armin.
** Then there's Reiner, the resident TeamDad and BigBrotherMentor to the other Trainees. He expresses that the strong should protect the weak, and is quick to risk his own well-being to protect the smaller, weaker members of their squad. It doesn't go well for him, because [[spoiler:he's actually TheMole. His commitment to his mission conflicts so much with his guilt and growing attachment that he begins suppressing his memories in order to cope]].
* ''PandoraHearts'' gives us [[CowardlyLion Gilbert]] [[HitmanWithAHeart Nightray]], who has a rather... [[ThickerThanWater complicated]] relationship with his younger brother [[FauxAffablyEvil Vincent]]: he is fully aware that Vincent is a [[KnightTemplarBigBrother Knight Templar Little Brother]] with dubious motives at best, but Gilbert still feels responsible for him. He is also fiercely protective of his foster brother [[{{Tsundere}} Elliot]].
* A couple examples from ''Manga/MyLittleMonster'':
** Micchan has this for Haru. He has been taking care of Haru since Kyoko, Haru's aunt and Micchan's mother, passed away. He even let him stay at his place while Haru was suspended from school.
** Shizuku has big sister instinct for her kid brother. She may be stoic and seem unfeeling, but she's really affectionate with Takaya.
** Yuuzan attempts to show this for Haru. However, since Haru is scarred mentally and emotionally from his childhood, he is unable to recognize Yuuzan's true motivations.
** Haru also displays this toward best friend and classmate Asako, even going so far as to beat up Micchen for making her cry.
* Cocoa from ''Manga/GochuumonWaUsagiDesuKa'' considers Chino to be her surrogate little sister, much to the latter's annoyance. Later on customers to the cafe she works [[LampshadeHanging says she has a "sister complex."]]
* In ''LightNovel/{{Bakemonogatari}}'', Koyomi Araragi used to be a BigBrotherBully to his two younger sisters, and still enjoys teasing them a lot. But whenever he thinks they might be in danger, he goes straight into TranquilFury and at that point ''nothing'' will stop him from getting at the person threatening them.

** [[TheStoic Masrur]] cares a lot for his young pupil and fellow Fanalis Morgiana. Harming her is a sure way to [[BerserkButton tick him off]].

* ''DarkerThanBlack'': There is a ''reason'' Hei goes [[BerserkButton completely nuts]] when his [[strike:Dead]] missing sister is brought up. [[spoiler:Namely, the reason he came to be a BadAss martial artist in the first place was to protect his Contractor sister. That's right, the normal sibling wanted to protect the one with superpowers. [[BadassNormal And did a pretty good job]] up until [[RealityIsOutToLunch Heaven's Gate]] somehow fused them.]] In the second season, [[spoiler:he starts treating Suou as a substitute little sister.]]

* {{Durarara}}'s Shizuo Heiwajima is rather protective of his little brother Kasuka (aka TeenIdol Yuuhei Hanejima). The mere act of namedropping Kasuka is enough to make him suspicious of your intentions, while insulting him or attempting to poke into his personal life results in an instant UnstoppableRage. In the LightNovels, he eventually goes on to develop another Big Brother Instinct towards a young [[TheRunaway runaway]] [[MafiaPrincess Yakuza Princess]].