- Blackbird (Arrow): Very darkly invoked. Dinah gives Laurel to the League of Assassins to secure Sara's freedom under the "rationale" that as Sara's big sister, Laurel knows it is her responsibility to protect Sara.
- In the end, Laurel sees the toll things have taken on Sara, finds it hard to hate her sister, and sincerely wishes she'll get better; but knows that she cannot be the one to help her recover.
Avatar: The Last Airbender
- In Field of Innocence, Lu Ten has this for his little cousins, Zuko and Azula, who both see him as an older brother. When he finds out that Ozai has been abusing them during training, the normally sweet and kind prince gets scary.
: [after slamming Ozai against a wall]
Now you listen to me, Uncle, and listen good. If you hurt either one of those kids again, if you say anything to make them feel bad, if you so much as look
at them wrong, I will face you in an Agni Kai
and I will break and humiliate you in front of the entire court.
I don't care who you are. I don't care if our family is watching. I'll hold nothing back, I will destroy you!
- In Beast Wars Fan Series, Cheetor starts off having this towards Victoria, saying during the first movie that she's like a little sister to him.
Big Hero 6
- Fanon holds Tadashi Hamada for the perfect Nice Guy until someone breathes wrong in Hiro's general direction. Then Tadashi switches into "gonna commit MURDER with extreme prejudice and won't regret anything" mode.
Bridge to Terabithia
- Bridge to Terabithia 2: The Last Time, being set five years after the original, have Jess becoming this as part of his Character Development, being extremely protective towards his younger sisters, Maybelle and Joyce-Ann. Notably in the Thanksgiving chapter, in which Jess beats up his obnoxious douchebag cousin, Nicholas — who is a few years older and taller than Jess — for shouting at Joyce-Ann and making her cry.
Buzz Lightyear of Star Command
- A Loud Among Demons
- Loona becomes increasingly defensive of Lincoln. While Loona ignores Blitzo's attempt to call her in "Harvest Moon Festival" like in canon, as soon as she hears Lincoln in pain, she quickly comes to his aid. When they get lost in a monster-infested forest and he gets nervous, she tries to calm him down by complimenting him on his marksmanship.
- Vortex feels this way about Lincoln, promising to hurt anyone who tries to hurt him.
- An Impractical Guide To Godhood: When Jackson makes it clear that he's going to conscript someone from the Aphrodite Cabin for his quest, Sileena repeatedly tries to volunteer to protect her half-siblings.
- Do not threaten Kanae in front of Kyon in Kyon: Big Damn Hero. Do not try and kill Kyon once he's done teaching you why you shouldn't attack Kanae. She may not be his little sister, but he treats her like one.
- In The Wizard in the Shadows, Boromir and Aragorn see Harry as a little brother, Aragorn in particular. In the sequel, Boromir outright refers to Harry as a little brother, and spectacularly tears into a guardsman who mocks Harry. As he tells Aragorn, that is something he will not let past.
- Harry sort of has this with Emrys.
- In Child of the Storm:
- Lex Luthor doesn't tolerate anyone harassing Carol, being her self-appointed Knight Templar Big Brother, even though she can handle herself better in a fight than he can (especially by the sequel). The last person who refused to take no for an answer was put on a one-way flight to Guantanamo Bay, which only turned around once he swore on his life never to go near Carol again. The trope ends up being deconstructed when Carol points out how this had a negative impact on her life, and it becomes Once Done, Never Forgotten for Lex.
- Harry tends to take this attitude to anyone he feels needs protecting, such as Luna Lovegood, Bobby Drake, and in the sequel, Clark Kent. Since he can pass for Clark's brother for a number of reasons, and looks older thanks to his more traumatic experiences, he even fits the visual archetype. Since he qualifies as a Person of Mass Destruction by the end of the first book, becomes a fully fledged Apocalypse Maiden in the sequel, and has a nasty temper combined with a creatively ruthless streak, this makes him dangerously effective.
- Carol develops this towards Diana, who, though tiny by comparison, could probably tear her in half, whereas Carol is a Badass Normal (later an Empowered Badass Normal, as a Super Soldier). She's also very protective of her little brothers, who don't have powers, to the point of telling a vampire who implicitly threatens one of them that she'll kill him if he even touches her brother. She later does exactly that. Later in the sequel, Harry notes this as a consistent character trait of hers, particularly towards younger girls, and in the spinoff she develops this attitude towards Peter Parker.
- Jean Grey is described as being 'big sister to the world', and is particularly protective of Harry and later, Maddie, the latter of whom she says that she'd take on the entire universe for. Since she is with the exception of her twin, Maddie Pryor the most powerful mortal psychic ever born, embracing her full potential by the end of the first book, she has the family temper, this is not something to be taken lightly. In Ghosts of the Past, she makes it clear to Coulson that she does not trust SHIELD, and that if they even breathe the wrong way towards Harry or Maddie, she will personally bring the entire organisation down around his ears.
- Code Geass: Paladins of Voltron
- Above all else, Lelouch wants to protect his sister, Nunnally. Charles exploits this after Schneizel finds Nunnally by allowing her to give an international broadcast begging the Black Knights to cease hostility, knowing Lelouch will come to save her. It still backfires, though, because Lelouch was able to out-think Schneizel.
- Rai was willing to totally destroy his sister's trust in him by attacking her just so that the Galra would choose him over her to fight in their gladiator arena, allowing her to be assigned to the comparatively safer forced labor groups.
- Code Prime:
- As is the case with most Code Geass-related fics, Lelouch's first priority is the safety of his sister Nunnally, even starting a war against Britannia and the Decepticons to create a better world for her. He can also be protective of Euphie as well. Notably, Lelouch was pissed when Euphie was kidnapped so the Decepticons could massacre the SAZ.
- Arcee and Cliffjumper are both protective of Kallen. When Kallen is taken hostage by Makeshift, Cliffjumper, who's easily one of the most laid-back and easygoing Autobots, looks ready to blow Makeshift's head off if Kallen is harmed.
- Bulkhead develops this for Rai, becoming protective of him at times.
- Nonette also has this for Rai, being an older sister figure for him, as well as his former pesonal knight.
- Xingke is as protective of Empress Tianzi as Lelouch is of Nunnally.
- Cornelia still dotes on Euphemia even in adulthood. When the Decepticons kidnap Euphie and replace her with a Pretender to commit the SAZ Massacre, she fights Megatron himself to get revenge.
- In addition to Euphie, Cornelia had this attitude for Lelouch and Nunnally back when they were part of the royal family. Even after Lelouch and Nunnally were exiled, her love for them never wavered. After learning they are still alive, and Lelouch is Zero, Cornelia defects to the Autobots and Black Knights so she can atone for her past sins, and for failing them.
- Equestria Girls: A Fairly Odd Friendship
- Rainbow has this for Scootaloo.
- Sunset is developing one toward Timmy, seeing him as a little brother, as are the other Rainbooms who are becoming protective of him as they see him deal with bullies and unfair teachers.
- Turnabout Storm: Cruise Control, who has so far been a total doof, turns dead serious for a few seconds to tell Apple Bloom that big brothers always care for their siblings, perplexing Twilight. It turns out he follows this to a T, as he was perfectly willing to go through with Ace Swift's blackmailing and become a loser if it meant his little comatose sister getting the medical care she needed.
- The Megamind & Rise of the Guardians crossover story Protectors has Rikki, the elder sister of Roxanne, who is not only protective over her sister, but the other kids as well, especially Teal (Megamind). During the story, it's realized that Wayne's (Metro Man) father and her mother have been conspiring to turn poor Teal into a villain with Wayne as the hero. When Rikki comes face to face with them both, she's not happy.
Rikki: "Despicable villain?! He's just a child! He may look different, but that doesn't make him a monster! You're the monster, you racist, bigoted bastard!" [punches him, hard enough to knock over]
- She then yells at her mother, but refrains from hitting her. That is, until her mother goes for Roxanne. Then she's on the floor with Wayne's father.
- Jack Frost is this as well in the story, although he doesn't get quite so... violent.
- The Bridge:
- Xenilla has an odd relationship with his "little brother" Godzilla Junior. They might be enemies and Junior hates Xenilla's guts, but if anyone except Xenilla threatens or tries to kill Junior, Xenilla will do everything he can to utterly destroy them. King Sombra learned this the hard way. note
- The Sirens, for all their faults, deeply care about one another. They and the Dark Hunters go apeshit on Princess Twilight and the Rainbooms when they think she's responsible for attacking Sonata and stealing her gem. Aria later beats Human Twilight to an inch of her life after catching her.
- Nanosuits And Soul Magic: Alcatraz has this towards Team RWBY, especially towards Ruby, who reminds him of his little sister. His response to the White Fang kidnapping them and planning to broadcast their execution? Sneak into the facility, stealth-killing every White Fang member he comes across, and break Yang's chains. The sheer cold-bloodedness of how he acted upsets Ruby a lot.
- How the Light Gets In: The entire concept is mused on by Laurel Lance, as she reflects on the responsibilities of an older sibling, and the things she, Oliver, and Dean have done for their younger siblings.
- Jaune's eldest sister, Sky Knight General Carolina Arc, from thenote Fusion Fic Rise of a Star Knight, and its sequel Knights of Remnant: The Ring of Darkness. Glynda nervously tells team RWBY that she is quite protective of her family, especially Jaune, and when Yang asks why that is a problem, Glynda simply tells her to imagine what she would do if she were in Carolina's place and Ruby was in Jaune'sspoilers... . Yang concludes that they're in trouble.
- Ladybug in a Half Shell: Having a younger sister himself, Casey has zero tolerance for ass-grabbing, having beaten up Johnny Smith (also known as "Johnny the Perv") every time he catches him trying it (especially on April).
- In Thieves Can Be Heroes!, Makoto Niijima is this for her Childhood Friend, Izuku Midoriya, who is two years younger than her. When they were kids, she would protect him "like a lioness would her cubs" from bullies who wanted to poke fun at him for his Quirkless status. While he's more independent as a teenager, she still tries her best to help him through his troubled situation at Shujin, but is frustrated at the fact that he keeps her Locked Out of the Loop to keep her safe from the potential fallout if he fails to steal Kamoshida's heart.
- In Weight of the World, Yang is this to Ruby, America and Canada are this to each other, and England and France are to Canada and America. Throughout the series, each sibling goes to great lengths to keep the other safe. One example is when England goes so far as to threaten Russia when Russia manipulates America into unlocking his Aura, claiming he will destroy Ivan if he hurts England's family again.
- The Many Dates of Danny Fenton:
- Danny defends the KND from Cree, being reminded of how protective he is to Danielle.
- Jazz's Big Sister Instinct kicks in when she notices how much Danny wants to avoid Katie from Animaniacs.
- A Possible Encounter for a Phantom: When asked to visit Middleton by his current crush, Kim Possible, Danny is first ecstatic. Then she sends a picture of someone he knows, that being Danielle. He quickly gets serious and became angry when he learned Skulker and Shego attacked her.
- In Cross Cases, Crowley warns Harry to not even seem like he's gotten between Dean Winchester and his little brother. Sure enough, during the fight with Patterson's demons, Dean gets transformed back into himself early and sees Lucifer-as-Sam burning alive from flaming holy oil on the other side of a horde of demons, then starts mowing them down in a Mark of Cain-fueled rage with Amoracchius. But when Lucifer whisks Sam away to repair his burned body, all Dean can think of is to go after Harry, the one who took his Sam from him. And it's implied that if Lucifer had brought Sam back even a moment later, Dean would have set Amoracchius to Harry and destroyed the Sword of Love in the process.
- In many Maribat AU fics, all of the older Robins have this for Marinette, most often (and most violently) Jason.
- In the Stōked/Ben 10 fic Hanging Ten, Ty is Not Happy when he learns Kelly tried to pour Hot. Cooking. Oil on his younger sister Lo as part of her initiation. He's also grateful to Ben for intervening and stopping her that he personally threatens to go to his father and have him blackball Kelly if she tries to get him fired.
- When Gwen finds out Lo broke up with Ben because he kept his superhero life a secret, she is pissed and proceeds to rip Lo a new one.
- Chloe Cerise in Infinity Train: Blossoming Trail cares for her little brother and was pissed when her bullies not only drenched her in red paint, but also attacked her brother with the same paintcan. While she does try to be the bigger man and walk off, she snaps when Sara mocks how their dad never cares for Chloe. This makes Chloe snap and wail on her bully before threatening to kill her and all her students if they ever play a horrible prank like that again, call her "Monster Lover" or hurt her brother ever again.
- Age-inverted with Parker when he, Ash, and Trip set up an Engineered Public Confession against Chloe's classmates. When they started to insult Chloe and say that she deserves her disapperance, Parker grabs a baseball bat and prepares to beat one of them down with it, only for Ash to stop him, since he didn't want to have any injuries on the younger boy's instincts, even if the bully did deserve it.
- In The Bridge, Anti-Villain Gigan might act very aloof towards his little brother Megalon's antics. Technically they're not siblings on account of being completely different species, Megalon just being made as a new cyborg model by the same creators Gigan utterly detested. But when Megalon and fellow teammate Irys were in the path of danger by a rampaging Kaizer Ghidorah, Gigan threw everything he had a the dragon kaiju despite being utterly outclassed. His familial love was strong enough he even unwittingly manifest the Equestrian magic based on the Power of Love and Power of Friendship.
- When (the rather naive) Roxas is approached by a duo of flirtatious asari with No Sense of Personal Space in I'm Nobody, Ashley angrily tells them to back off, even bluffing that she's his older sister.
- In the Ben 10/Elfen Lied crossover Ultimate Lied, Ben first develops this towards Mayu, becoming her big brother in all but blood, brutally beating up her incestuous stepfather as Four Arms when he learns what he did to her. Later, he develops a similar bond with Nana, but at the end of the story, Ben's parents end up adopting Mayu when the main characters return to Bellwood, thus officiating their bond, while Nana ends up with Shirakawa and Dr. Kurama, with both being spared and Abled By The Adaptation.
- The members of the Justice League see Ben Tennyson as a little brother in Ben 10: Unlimited, and for good reason: they find out early on that an enemy of Ben's (later revealed to be Vilgax) murdered Ben's entire family and team, leading him to try to kill himself, but it was bungled and he ended up in the midst of the Thanagarian invasion with barely any time to grieve his loss before being thrust into another fight. As such, they do what they can to deal with his trauma, and end up becoming a surrogate family for him.
- This is strongly demonstrated in two major examples:
- When Ben ends up afflicted by the Black Mercy, he sees all his family alive again, and being forced to acknowledge they're gone leads to him breaking down. Even despite her injuries, Wonder Woman quickly moves to try to comfort him.
- They become especially infuriated when Amanda Waller attempts to recruit Ben into Project Cadmus. This is when the story explicitly states that Ben is like a little brother to them. They would be mad if any member of the Justice League was given such an offer, but it's more infuriating that they would try to recruit Ben into their ranks.
- In the sequel, Ben and Kara's son Ken holds a massive protective instinct of his little sister Jen, and develops a similar instinct to Secret, becoming absolutely furious when he learns Harm killed her to become pure evil and wield the Sword of Beowulf. When Harm insinuates that Ken could be like him if he killed Jen, it pushes the normally soft-spoken half-Kryptonian into an Unstoppable Rage, brutally beating him so badly that Raven and Artemis are left in complete shock. Afterwards, Ken works to specifically assure Jen and himself that he will never hurt her.
- In the One Piece/Naruto crossover Growth through Chaos this trope is simultaneously gender-inverted and age-inverted between Nami and Naruto after she learns his Dark and Troubled Past of being an outcast thanks to being a Jinchūriki, with Nami becoming Naruto's Cool Big Sis. On the one hand, do not harm or insult Naruto around Nami, or she will be furious, as when he is denied ramen for being a pirate, she actually goes swinging, surprising since she's normally the Only Sane Man of the Straw Hats (Money Fetish aside). On the other hand, do not insult or hurt Nami in front of Naruto, or he will get mad, as when Buggy calls Nami a "treasure-stealing she-bitch", he doesn't take it well, and when Alvida nearly hits her, Naruto gives her "the same face a certain Mizuki witnessed" and uses Shuriken Shadow Clone Jutsu.
- Additionally, Sanji develops a similar bond to Naruto, but mixes this with Big Brother Mentor. This starts back on the Baratie, where Naruto was inspired by Sanji's ideals of chivalry (for context, this is the Naruto at the start, who holds a torch for Sakura) and begins to look up to him. He even turns to him for training in both the culinary and martial arts, and his Big Brother Worship increases when Sanji convinces a starving Gin to eat. When Naruto undergoes a mental breakdown from his past, Sanji immediately picks up on this from his own experiences at the hands of his father, and demands answers from Kakashi as to what happened to him, grabbing the Jonin by the neck and raising fists against him.*
- In Harry and the Shipgirls, the destroyers at Yokosuka Naval Base view Harry Potter as their younger brother, and will visit grievous bodily harm on anyone who even thinks of hurting him.
- In Supergirl fanfic Hellsister Trilogy, Clark Kent is incredibly protective of his younger cousin, to the point of getting into a fight with a not-good-enough-for-her suitor.
- In To Hell and Back (Arrowverse), Barry, Kara and her baby cousin Kal-El arrive at Lian Yu shortly after Oliver. He becomes their big brother of sorts and he is extremely protective, to the point that he is willing to let himself be killed if it would guarantee his surrogate family's survival.
- In Arrow sequel Legacy Series, Oliver and Felicity's son is fiercely protective of his little sister. "Id do a lot for that kid," he says. "Anything that was right and a lot of things that were wrong."
- In Batman story The Choice of Family, it was inverted when Tim and Damian angrily called out Jason for putting Dick in danger and having him end up at the hospital. But it was played straight in the sequel Antidote for the Poison where Jason was furious when he found out Tim was injected with a dangerous amount of heroin by some drug dealers. When he cornered said drug dealer, who knows what he might have done if Damian wasn't there.
"You took my little brother, tied him up, pumped him full of heroin, and left him to die in this shit hole. Now I ask you: do you think I have the slightest bit of remorse about cutting you open and letting your guts decorate the floor?"
- Jason also openly acknowledges Tim and Damian as his younger brothers and brings Damian safely home after he and Damian go out to get the drug dealers.
- Kara of Rokyn: In his own words, there're few things would induce Superman to forget about his oath about not harming or killing anybody... but the mere act of hurting his little cousin is one of them.
- A Force of Four: Whatever else you may say about them, Mala and Kizo are very protective from their little brother U-Ban, and they're not pleased when Power Girl beats him to the ground.
- Xanatos: Matt shows this toward Linda, most notably in chapter 3.
- A Captive Light has Tai and Matt. Matt lays the smackdown on Ken after T.K is attacked, and earlier Tai charges Ken, despite the fact that he is "13 feet above the ground, riding an 8-ton monster."
- Rebecka Smith-Rhodes is the oldest of three daughters. Her younger sisters are, respectively, an extrovert student Assassin and a socially awkward Child Prodigy. She is devoted to both and would go a long way for either. She also realises, with mixed feelings about it, that at least two thirteen-year-old girls who have no female siblings of their own have come to regard her as a surrogate big sister. Wondering if "BIG SISTER" is written on a billboard held over her head in six-foot-high letters, Bekki sighs resignedly and gets on with being a Witch. Read more in the Discworld of A.A. Pessimal.
- In Time and Space, Zanna Sterling is just about ready to drop everything and go after Garrett when he goes into a cemetery where a couple of guys have gone missing. Why did those guys go missing? Because a Weeping Angel was living there.
- Raonar, the Guile Hero dwarven prince in Dragon Age: The Crown of Thorns develops some advanced protective tendencies towards the dwarven commoner, Faren, as evident when the former finds the latter trapped in his worst nightmare during the Broken Circle questline in the Fade. The resolution with the sloth demon can be seen as a partial subversion, however, because it's Faren himself who, ultimately, curbstomps the demon before the protagonist sends him over to Justice to be dealt with properly.
- In the Dragon Age: Inquisition AU fic series Twice Upon an Age, this is how Mahanon behaves toward Victoria. His da'vhenan ("little heart") is arguably the most important person in the world to him, and there are repeated instances of his determination to protect her. (Dorian treats her very similarly, though a little less intensely because they haven't been through as much together as Mahanon and Victoria have.)
- Much as in canon, Hawke is extremely protective of Bethany in the Skyhold Academy Yearbook series. This even extends to In-Universe fictional portrayals of her, such as in the noir story written by two of Varric's students, where her price for agreeing to help the detectives with their case is that they have to provide her sister with protection. Dorian behaves the same way toward Evvy, who is "the sister I never had."
- Getting her sister back after ten years missing have made Isabela in Guiding Light (AuroraRose2081) more tender and protective of her in comparison to the original movie. She's the first to realize that the orphanage where she and the kids lived was a horrible place just by noticing Mirabel stocking up food.
The Fairly OddParents
- In A New Hope, Leon has one of these for his sister Aerith. It's so strong that he filed a restraining order against Zack, and threatened to kill him if he ever does anything to Aerith. Of course, it doesn't stop him from trying a second time.
- In Golden Threads Tie Us, one of the Severa's regrets is that she was unable to protect her little sister Morgan. Severa even goes so far to compare herself unfavorably with Lucina, who has always been able to keep her own little sister Cynthia safe.
Lucina peered at her for a moment, then turned away. It seemed like she decided not to press the issue Lucina would understand her, Severa realized, because she was a big sister, too. I wonder what Lucina would do if something happened to Cynthia. No, Lucina never would let Cynthia come to harm. Not like Severa, who had let her own younger sister go right before her eyes, and now she was it was all Severa's fault -
- Forward has a very plausible version of this develop between Jayne and River, after they end up relying on one another to survive and escape being tortured by Niska.
- Free! fanon usually has Rin, who's normally an Aloof Big Brother, secretly be very protective of his little sister Gou.
- Red Butterfly: Akane is fiercely protective of Tohru. In chapter 2, she, believing Tohru was in the tent when it was buried in the landslide, doesn't hesitate to try to dig her out with her bare hands.
- build your wings on the way down: Edward is very protective of Nina and Al. He tries to spend as much time with her as possible to keep her away from her father. To Hughes' surprise, Ed is very patient and understanding with Nina. He beats the crap out of her horrible father and faces the Gate just for the chance to save her.
- In My Master Ed, after finding him in the past, Edward becomes highly protective of Hohenheim of all people, taking him in under his wing and giving him food, shelter, and an education.
- In Home Is Where the Haunt Is, Dipper takes it upon himself to confront Mr. Mason when he thinks the latter may be harming his sister. Mr. Mason doesn't miss the opportunity to tease him for it.
- In Harry's New Home, the normally law-abiding Percy snaps when he finds out that someone tried to use the Cruciatus Curse on Ron.
- In "My Brother", where Harry tolerated the Dursleys' abuse in canon, he only stays with them from the end of second year onwards because the protection provided by the blood wards also protects his younger sister Emma, and even that was only after Dumbledore modified the wards to protect the Potters from the Dursleys' further abuse.
- In And the Unethical Binding Contract, where a first year Harry is chosen to participate in the Triwizard Tournament, the other champions Cedric, Krum and Fleur all worry for him and try to subtly and not-so-subtly give him advice to make sure he stays alive throughout the tournament. Especially in the second and third tasks, they decide to team up to protect Harry from the various beasts and traps.
Hetalia: Axis Powers
- In Hetalia: Axis Powers's Fanon, it's a known fact that America is protective of his twin brother Canada. Sometimes, he's portrayed as an over-protective brother whenever another nation is interested in Canada.
- There was this one story (based on Vocaloid's "Servant of Evil" series), where Russia had killed Canada, mistaking him for America. Bad move, as America promptly declares war on Russia.
- It also works the other way around. In a lot of fics, if America is hurt or captured, Canada is the one to rush to his rescue, in the most badass ways possible.
- It goes the same way with Russia and his two sisters Ukraine and Belarus. There was this one story where Ukraine had mysteriously vanished, Russia believing that America was the one doing it ( He didn't) grabbed him by the throat and for all measures, was perfectly willing to rip America's head if it would bring his sister back.
- In the fanfiction Awakening, America and Canada both act as big brother figures and protectors to the children being kept by Joseph Mengle. Given how history went, itreally ends badly. Until the end, when it's revealed that they did inspire at least two of the surviving kids to keep going until their lives got better. Aw!
- If they're not shipped together, it's possible that England may take this role for America instead.
- If Scotland isn't portrayed as an abusive bastard, it's possible he's portrayed as this for England, Same goes for North Korea, towards South Korea. The latter is to be especially expected in fan-fics about their childhood.
The Hunger Games
- In Some Semblance of Meaning, Vale exhibits a Big Sister Instinct for not only her four younger siblings but for her district partner Kit, as well. Typically, Vale is a Shrinking Violet, but if someone tries to hurt Kit, it's a good reminder of why one ought to Beware the Nice Ones.
- The Victors Project has several examples of this: During the 2nd Quarter Quell, a boy named Watts Jafowsky volunteers for his thirteen year-old brother (and is noted as the last sibling to do so before Katniss), while Charlie Perez-Hooley promises his sister and fellow tribute that if the careers corner them, he'll Mercy Kill her. This also applies to various victors, such as Cotton Rivers (who was reaped at the age of sixteen due to taking a lot of tesserae to feed her four sisters), who and twin victors Gloss and Cashmere towards each other.
- In fernwithy's The End of the World series, Peeta's brothers get this treatment, in a downplayed fashion, with one of them working to send him sponsor gifts during the 3rd Quarter Quell and the other having been in a pillory when the District was firebombed for angrily picking a fight with a peacekeeper.
Jackie Chan Adventures
- In The Ultimate Evil and its sequel, The Stronger Evil, one of the quickest ways to push the bookworm Valerie Payne to act is Jade being endangered. She will face everyday crooks and the Demon Sorcerers, ally with Shendu (who desires her) and/or Shendu's (and her) son Drago, and even offer herself to Shendu against the other heroes' wishes in order to guarantee Jade's safety.
Kill la Kill
- Played with in The Outside:
- This is Justified and deconstructed in the case of Satsuki and Ryuuko. For much of the story, the two only had each other, especially in light of their parents' separation and Soichiro's death. The deconstruction mostly happens because it's not that Satsuki was just protective of Ryuuko, it's that she's overprotective and Motivated by Fear because she's agoraphobic and, since she thinks the outside world is dangerous, she keeps the former isolated and confined indoors. Likewise, because the two had only each other, they're each other's Living Emotional Crutch, as Satsuki's the only family Ryuuko had known and Satsuki was alone otherwise.
- Later,though they aren't related, we have Shiro playing this role to Ryuuko and Nui, as he protects and guides them, in a Promotion to Parent way.
- Natural Selection:
- Inverted with Ryuko when she was growing up. She once beat up someone when they made fun of her older sister's eyebrows.
- Inverted with Nui, both in the past and present. Upon hearing about the above incident, her first instinct was to rip hairs from the boys Ryuko and Satsuki had brawled with and set about making voodoo dolls. In the present, there are no measures she will not take to rescue Ryuko from Nudist capture.
- Played straight with Satsuki. It's telling that even after everything that happened between them, her immediate instinct upon waking up and seeing Ryuko captured by Nudists is to try and save her.
The Land Before Time
- Land Before Time Retold: Gender-flipped; Aylene develops this to the rest of the gang, especially Littlefoot. In one chapter of Great Valley Adventure Retold, as soon as Littlefoot's head goes under the sinking sand, Aylene personally jumps right into the sand and pulls his head up before having the others pull them out.
The Legend of Zelda
- Dimensional Links:
- Hearing that Aryll was kidnapped causes the other Links to freak out despite never meeting her before. Wind quickly calms them down by saying he already rescued her.
- Dusk develops this towards the entire group. Past Ganon found this out the hard way.
- Almost named in The Legend of Zelda: The Wind Waker as one of its chapters (but it uses the word "reflex" instead of "instinct"). Link is rather protective of Medli because she reminds him of his little sister. First, he saves her from falling off the edge of a spiral path in the Aviary, despite her having wings. He claims that he does this a lot because his sister enjoys playing on a lookout. Next, he immediately runs to Medli's aid after the wind causes her to crash into a cliff. Additionally, he bandages her sprained wing, which he got used to after his sister ran into a wall.
The Loud House
- In Mall Rats, Leni takes Lincoln on a surprisingly enjoyable outing at the mall, when it gets interrupted when a bunch of jocks start bullying Lincoln. Leni, though slow to pick up on the bullying, eventually steps in, but the bullies don't pay her any mind.
- No Such Luck, No Such Love: In Chapter 14, Lana has a nightmare about Lincoln running away. When she wakes up, she rushes to Lincoln's bedroom to make sure he's still there and then breaks down sobbing while hugging him. Despite his current negative feelings towards his sisters, Lincoln comforts Lana, doesn't probe her about the details of the nightmare, and allows her to share his bed for the rest of the night. Before he leaves early for school the next morning, he leaves the still-sleeping Lana a note telling her she can talk about it when she's ready.
- Requiem for a Loud: Lynn, seeing her brother slowly die, becomes very protective of him. When Ronnie Anne punches Lincoln in a jealous rage, Lynn is not pleased, and gets into a fistfight with Ronnie to get her to leave-a fight that is only stopped by Lincoln's intervention.
- Susanoo is very protective of Tsukuyomi in Infinity (though she's technically older than him). Chrono acts the same way for Fate, but he's a lot more low key about it.
Marvel Cinematic Universe
- "The other side" sees Peter get quite a few 'older siblings' after the other half of the universe survives the Snap; while Peter is still acknowledged as the leader of the New Avengers, other heroes have essentially taken it upon themselves to protect him while he works on finding a way to undo the Snap, to the extent that Jane Foster observes that Peter Quill and Wanda Maximoff have a subtle "competition" over their role as Peter Parker's older sibling whenever the three are in the same room.
- In Turning Tables, Peter was adopted by Pepper during the early stages of pregnancy and has been there for them since the moment Morgan was born, having been there for nearly every important stage in her developing young life. This causes him to become equal parts doting older brother and the closest thing to a father she has.
Mermaid Melody Pichi Pichi Pitch
- The Warmth of a Sister's Love: Katiya goes to quite a few great lengths to save her little sister Kyla when she is caught by fishermen, beginning with swimming all the way to Japan to get help from Lucia and her friends.
- In Mega Man Reawakened, Robert is protective of Roll, and doesn't want her to make the same mistakes he did.
- Burning Bridges, Building Confidence: When Nora first learns that her younger sister was in a fight at school, she's furious, and gives Cole, who she believes started it, a Death Glare on sight. However, when she subsequently learns that Alya was the aggressor, having sharpened her fingernails before trying to claw Marinette and Cole's faces, she's understandably horrified, shooting Cole an apologetic glance before taking her side and telling Alyas family what she did. Alya naturally sees this as a huge betrayal on her big sister's part.
My Hero Academia
- In Custody Battle, All for One locked his younger brother in a bank vault out of very misguided protectiveness.
- In Forgiveness is the Attribute of the Strong, the eleven-year-old version of All for One is extremely protective of his little brother, due to their abusive childhood.
- In Karma in Retrograde, Touya Todoroki was always looking after his younger siblings, playing with Fuyumi and Natsuo as much possible to cheer them up for being neglected by their father. He'd also intentionally piss Endeavor off to deflect his attention from Shouto onto him, allowing Touya to face the brunt of his father's wrath in Shouto's place.
- Inverted in Juxtapose. Momo tends to treat Tamaki like a little brother despite being two years his junior due to his constant Shrinking Violet tendencies.
My Little Pony: Friendship Is Magic
Neon Genesis Evangelion
- Advice and Trust: Asuka and Shinji's feelings for Rei are... complicated, but they are incredibly protective of her. Both of them have said that they care about her almost as much as they care about each other, and one of the fastest ways to piss them off is to hurt her.
- Uriel Dolheb Sohryu of Nobody Dies has this towards Asuka Langley Sohryu, given that she's his adopted sister and he feels compelled to protect her and make her happy, even if he has absolutely no idea how to do it beyond giving Shinji the If You Ever Do Anything to Hurt Her... speech. His Big Brother Instinct also extends to Asuka's half-sister Mari Illustrious Makinami, to the point where her attempts to flirt with him fly completely over his head.
- Once More with Feeling: Shinji returns to the past knowing Rei is his sister and instantly becomes very protective from her. When someone asks him about it, he tells Rei is like a sister he did not know he had (which is actually accurate).
- In The Second Try, we have -of all people- Rei, who becomes very protective of a young girl named Aki Ikari that got separated from her parents, to the point of trying to keep her safe from armed JSSDF soldiers that mistook her for a second generation EVA pilot. This relationship carries over to the sequel, where she argued with Aki's parents about enrolling her in preschool, fearing that the environment she grew up in might make it difficult for her to get along with the other kids (and on Aki's first day, she waited outside the school, just in case).
- In Maybe Then Someday, Don's canon behavior is also shown in this story when he will do what it takes to try to find Charlie, who was kidnapped.
- Seven Days Survivor has Midori develop one towards Nanako, thanks to shared personal experiences (both had their mothers die at a young age), and Midori resolved to help out Nanako as best she could. How this will affect Yu's canonical feelings has yet to be seen.
The Phantom of the Opera
- Pokémon Reset Bloodlines:
- Iris is portrayed this way towards Axew, whom she considers a little brother. She's more than ready to beat the snot out of anybody who causes him harm in any way.
- The three older Eevee Brothers, while veering a little into Knight Templar Big Brother territory, are very concerned with the well-being of their younger brother Mikey, and genuinely want him to succeed as a trainer and be happy.
- Sylvia the Sylveon:
- Moondancer, one of Sylvia's brothers, is this to Sylvia before he leaves and during both of their reunions.
- After Sylvia nearly dies of hunger, her brother Bolt gives her the food she needs, then allows her to stay with him and his family forever, although she only stays for a week due to wanting to return home before deciding what to do.
- In an inverted case, Sylvia fits this trope when she saves Alseides and Konoha from being beaten up by their trainers.
- Bonds Left Unbroken: Desmond is fiercely protective of Hershel, especially concerning Targent.
- In Professor Layton and the Mystery of Stone, Luke's dynamic with Flora is flipped around, with her being the one worrying over his safety (being furious that Luke's being bullied at his new school in America and being willing to pay any price if the villain of the story will stop hurting Luke, for example). Interestingly, the story also features Clive in his Fanon role as protective older brother figure to both Flora and Luke, even being willing to strangle the villain of the story when they hold Luke hostage and only backing off because they pull out a knife.
Rise of the Guardians
- In the story Guardian of Light, the main character, Helen, is this to her two younger siblings, Jamie and Sophie. This quote from the third chapter pretty much sums up how protective she is over them:
Jamie: "She's our sister! And she'll kick your butt if you go near us! One time, when I was getting picked on by some bullies, she tore a plank of wood off the fence and chased them away with it!"
Helen: "Jamie, we almost went two years without ever mentioning that."
- Yang, of course, has this throughout Ruby and Nora. Though she knows Ruby can take care of herself, and puts all of her faith in her when Ruby is in a dangerous fight, if Ruby is held captive or threatened, the bad guys get hurt...badly.
- Weiss Reacts: Yang and Winter, towards Ruby and Weiss respectively. And the former has it towards Weiss as well. Just ask the poor Grimm who attempted to kill Weiss.
- White Sheep (RWBY):
- Jaune is quite protective of his little sister Lavender. Lavender is well aware of this, and plays up her cuteness more than a little in order to get what she wants out of him. She does genuinely love him, she just doesn't see that as an impediment to manipulating him. When Team RYBN nearly kills her while she's in Grimm form, Jaune bursts through the wall in an Unstoppable Rage and nearly kills all of them.
- Jaune's eldest sister, Sapphire, is extremely protective of all her siblings. Not only is she by far the strongest of them all, but she's far more interested in their safety than their wishes. She is perfectly willing to beat Jaune senseless and drag him back to the castle if that's what it takes.
- The Sanctuary Telepath: John acts like this towards Janine, despite her being the older one by two years. Janine does the same with him and Helen, then there's James, who is older than all of them... It's basically a big mess of everyone being protective.
- A common motif in Sherlockian fanfiction is Dr. Watson being veeery protective of Sherlock Holmes (a canonical truth, but one that gets emphasized in fics). The Deliver Us from Evil Series is a good example of this, giving Watson a troperiffic role in Mortality (Badass Boast, Berserk Button, Darker and Edgier, Deadly Doctor, Earn Your Happy Ending, The Hero/The Leader, Heroic Vow, Screw the Rules, I'm Doing What's Right!, Violence Is the Only Option, and You Wouldn't Like Me When I'm Angry!). Those criminals really should not have messed with Holmes... which proves that if they do, the end result is not pretty. Smith found that one out the hard way. Way to go, Smith.
- Bart Simpson: Attorney at Law: 17 years into the future, the Simpsons siblings are still close knit and don't take kindly to those threatening them.
- Maggie is the younger sister, but she doesn't appreciate Jessica gloating about sleeping with Bart.
- Lisa is not happy with Bart having anything to do with Jessica Lovejoy, and yanked Burns by the collar and yelled at him when he initially refused to make a life-saving blood donation to Bart.
- Bart was not happy when Jeremy involved Maggie in his blackmailing scheme.
A Song of Ice and Fire
- Jon Snow in The Dragon's Cub is a Friend to All Children who is deeply protective of kids he acts as a big brother towards, but special mention goes to Joy Lannister. When he first meets her, she only 2 name days (or years) old and crying because she's been left alone by her maid, so Jon proceeds to keep her company by playing with her until her maid returns, upon which he has her reassigned to a different job. And that's not even getting into what Jon did to help her after she got poisoned.
- Safe Anchorage:
- Asha Greyjoy is very protective of Theon after his year of imprisonment and Cold-Blooded Torture.
- Theon's desire to protect and care for Jeyne Poole is framed as familial. At one point he comforts her in a way Asha explicitly did to him.
Spyro the Dragon
- A female example in The Legend of Spyro: A New Dawn is Cynder towards Ember. Ember is slightly younger than her, but is very childish and naive. Despite the fact Ember has her characteristic crush on Spyro (though in this case, it's due to being to socially naive to realize Cynder and Spyro are mates), Cynder ends up having this mentality towards her, even describing her as being like "an annoying little sister" at one point. This makes hurting Ember in front of Cynder one of her Berserk Buttons, which Cyros finds out the hard way when she performs a Break the Cutie on Ember and gets her kidnapped. Cynder reacts violently.
- In The Chaotic Three, while its never clearly stated if Rey is the youngest of the Chaotic Three, Poe and Finn are swiftly established as being so protective of her that both were prepared to shoot Yoda if he had caused Rey permanent harm.
- Street Sharks Redux has all of the brothers fiercely protective of each other, but they're especially inclined to protect Slammu, the youngest. This is one of the reasons it's especially painful for them when he ends up Brainwashed and Crazy and they have to fight him.
- In Tales of the Abyss What If? fic Reflections, Asch becomes this to Luke, from managing to get to Luke in an improbable amount of time after he gets warped to the other side of the world to when he locks Luke up and almost sacrifices himself at the Tower of Rem just so the other could survive.
Teenage Mutant Ninja Turtles (2012)
- Heroes in the Shadows:
- While Raphael isn't their biological brother, he is still fiercely protective of his younger brothers, even volunteering to
- Miwa develops an obsessive training regiment after Donatello gets kidnapped, worried sick over the idea of it happening to any of her other brothers.
- Roses in Winter establishes that Emmett has a tendency to do this, to the extent that he swiftly declares himself to be Angela's brother when he realises that she has an abusive home life.
World of Warcraft
- In Stars from Home, Scott is immediately protective of Alex and has been this way since childhood, and Alex eventually becomes the same way about Scott. Each considers himself the older brother. They both behave this way towards Ororo.
- They're all protective from exterior threats, but consider each other fair game. Especially Alex and Scott.
Young Justice (2010)
- In Of Monsters and Men, 13-year-old Robin (aka Dick Grayson) is nearly raped by a human trafficker while Kid Flash, Aqualad, and Speedy are tied up hand and foot unable to do anything other than listening helplessly in utter fury. When Dick gets frightened enough to start screaming in fear, Wally manages to literally vibrate his molecules through his restraints, Flash Step to Robin, rip the would-be rapist off him, subject the perp to a Groin Attack, and get his friend the hell out of dodge. Robin is the youngest of his friends and all three of them, especially Wally, are very protective of him.
- In Chaos Effect Self Insert Edwin Chaos tries VERY hard to not to alter canon, understanding this could lead to the end of the world. He lasts until the second chapter after he and Mako save Yugi and Joey from drowning after Weevil threw the Exodia cards into the sea. Edwin storms towards Weevil, every duelist parting to let him pass, then grabs Weevil and threatens to toss HIM overboard unless he gives Yugi and Co his room key.
- Edwin's second attempt to just let canon happen dies a swift death when he sees Kemo grabbing Mokuba. Edwin goes full Papa Wolf on Kemo. The end result is Mokuba is never recaptured by Pegasus, with Edwin now acting as his guardian and protector, and swearing to burn Duelist Kingdom to the ground for everything that happened.
- During the Shadow Game between Yami and the Spirit of the Ring Edwin refuses to lt Joey send himself to the card graveyard, even though he knows Joey will be fine. Instead he decides to challenge the series' Big Bad purely to protect Yugi and his friends.