History Main / EveryonesBabySister

* [[ChildProdigy Chiyo-chan]] in ''Manga/AzumangaDaioh'' is a downplayed example; while the series is a SliceOfLife story free from major conflict, if Chiyo is threatened in any way, or if she gets mocked by a bully for [[GradeSkipper her age]], the other girls are very quick to protect her. Sakaki in particular has a BigSisterInstict toward her, using her inntate athletic ability to make up for Chiyo's relative lack of it. Even Tomo, who's normally TheGadfly, eases off on Chiyo if she feels like she's gone too far in her teasing.

[[quoteright:350:[[Webcomic/MobPsycho100 https://static.tvtropes.org/pmwiki/pub/images/protectbabbyatallcosts.png]]]]
[[caption-width-right:350:Protect baby club member at all costs.]]

Sometimes these characters inspire this reaction because they’re [[TheCutie impossible to dislike]]. Other times, the character really isn’t very likable at all; it's just that the other characters feel responsible for them. Because main characters tend to be the [[ActionHero Action Heroes]], this character is more often a supporting character than a lead. By coincidence or design, these characters are often dorky TeenGenius types (or early to mid twenties genius, as the case may be), though this is certainly not a prerequisite. These characters also tend to be [[EnsembleDarkhorse fan favorites]], though this, again, is by no means, necessary. It is not unheard of for TheScrappy to fall under this trope. What’s important here is the reaction of the characters, not of the audience.

* ''ComicBook/SecretAvengers'' Volume 2 seems to play [[Characters/MockingbirdMarvelComics Mockingbird]] like this during the "[[BreakTheHaughty How to Maim a Mockingbird]]" arc. ComicBook/{{Hawkeye}}, her ex-husband, is visibly torn up from seeing what happened to her during the arc, ComicBook/BlackWidow stops joking and talks to her the way that a worried sister would when she realizes the seriousness of the situation, and [[Characters/IronManHeroes War Machine]] actually ''quits the team'' in protest and disgust at the fact that [[Characters/SHIELDDirectors Maria Hill]] allowed Mockingbird to get into such a situation (and is joined with Hawkeye in this), while Maria Hill herself is clearly not happy with herself for allowing this to happen and makes a promise to find her. Even ''[[Characters/AvengersEnemies Taskmaster]]'', the TokenEvilTeammate, is pretty shocked to see how broken she is and is clearly concerned for her welfare.

* ''Series/KamenRiderExAid'': Emu Hojo's [[AllLovingHero kind]], [[IncorruptiblePurePureness optimistic]] nature tends to incite BigBrotherInstinct in people around him. [[GoodIsNotSoft He]] is a capable [[TheChessmaster strategist]] and [[BatmanGambit manipulator]], but most of all, he wears his ideals and heart in the open, which makes him an easy [[BreakTheCutie target]]. The [[DysfunctionJunction CR Crew]] has been dubbed as ''[[FanNickname Emu protection squad]]'', because they will readily drop fighting with each other to help him.

Sometimes these characters inspire this reaction because they’re [[TheCutie impossible to dislike]]. Other times, the character really isn’t very likable at all; it's just that the other characters feel responsible for him or her. Because main characters tend to be the [[ActionHero Action Heroes]], this character is more often a supporting character than a lead. By coincidence or design, these characters are often dorky TeenGenius types (or early to mid twenties genius, as the case may be), though this is certainly not a prerequisite. These characters also tend to be [[EnsembleDarkhorse fan favorites]], though this, again, is by no means, necessary. It is not unheard of for TheScrappy to fall under this trope. What’s important here is the reaction of the characters, not of the audience.

* Mob of ''Webcomic/MobPsycho100'' becomes one for the Body Improvement Club, which will rally to his defense without a second thought. The knowledge that he's an insanely powerful {{Psychic Child|ren}} appears to have no ruling on this. [[JapaneseDelinquents Onigawara]] even weaponizes the club's protective tendencies by tricking a rival gang at Black Vinegar Middle School into taking him hostage, bringing the Body Improvement Club's wrath down on them.

* Comicbook/{{Nightwing}}: Dick Grayson began as Franchise/{{Batman}}'s KidSidekick, which in contemporary continuity was between 10-15 years ago. This makes him one of the most known superheroes in the world despite his relatively young age, and one that [[SoProudOfYou all of his older colleagues]] are ''very'' proud of to see grown into a [[NiceGuy fine young hero]]. Thus, if Dick calls on any other superhero for help, they will usually come running. These same older heroes (and some {{Anti Villain}}s, like Catwoman) will ''rain down the hurt'' on anyone who dares to harm Nightwing. ''Especially [[PapaWolf Batman]]''. In his solo series, this has saved his life more than once, as small-time villains who had defeated Nightwing in combat deliberately let him live because they knew that wasn't the kind of heat they wanted to bring upon themselves.
* ComicBook/KittyPryde of the ''Franchise/XMen'', who might be the closest to an AlternateCompany Equivalent to Nightwing in this respect. She joined the X-Men when she was 13 as a rookie, and unlike the ComicBook/NewMutants, whom were her age but joined after, she trained directly with the main team and was close with each one.
** The X-Men actually made a trend of this, starting even before Kitty joined. In the original line-up, ComicBook/JeanGrey was the token female member of the team and had the weakest power, which prompted the boys to alternate between being protective big brother-like figures and being infatuated co-eds, and as they got older all but ComicBook/{{Cyclops}} grew to see her as their sister (Scott was the exception because instead, the two fell in love). After Jean was Kitty, then after Kitty, Jubilee joined and took on a similar role, followed then by Pixie fulfilling a similar role later.
* Similar to the X-Men, the ComicBook/JusticeSocietyOfAmerica have done this since being revived in the 90s, and retooled so that, rather than simply be the Golden Age's primary team of heroes, the remaining members act as mentors and teachers to the [[LegacyCharacter legacies, proteges, and descendants]] of the original team and/or heroes they were friends with. Though they've had a few characters who fulfil the role, the original was [[Franchise/TheFlash Jesse Quick]], while the most prominent and popular was ComicBook/Stargirl, whom pretty much everyone sees as either a surrogate daughter or a kid sister. She seems aware of this, and is often ''annoyed'' by it.
* ''ComicBook/BlackCanary'': Among the Justice Society of America she had something similar to the above prior to their reformation, as most of them have known her since she was born, so they see her as their niece. In ''JLA: Year One'', her status as the only girl on the team and her youth (she was 19 at the time, while the others appeared to be in their 30s by comparison) lead to this, something she was ''vocally'' annoyed with as she frequently told them off for treating her like a damsel they had to protect. In ''Birds of Prey'', though the UndyingLoyalty goes both ways, Dinah being in danger seems to strike the biggest reaction from the others.

* In ''ComicBook/{{Runaways}}'', Molly and Klara fill this role, to varying degrees - Molly is ''everyone's'' baby sister, but Klara is more of a little sister to Nico and Karolina, while Chase and Victor treat her more like a Ladette. Oddly enough, the baby sister aura even seems to affect other people in the Marvel universe - for instance, during ''ComicBook/SecretInvasion'', Speed of the ComicBook/YoungAvengers literally went out of his way to keep Molly and Klara safe during a battle with the Skrulls.
* ''ComicBook/SecretAvengers Vol 2'' seemed to play ComicBook/{{Mockingbird}} like this during the "[[BreakTheHaughty How to Maim a Mockingbird]]" arc. ComicBook/{{Hawkeye}}, her ex husband, was visibly torn up from seeing what happened to her during the arc, ComicBook/BlackWidow stopped joking and talked to her the way a worried sister would when she realized the seriousness of the situation, and ComicBook/WarMachine actually ''quit the team'' in protest and disgust at the fact Maria Hill allowed Mockingbird to get into that situation (and is joined with Hawkeye in this), while Maria Hill herself is clearly not happy with herself for allowing this to happen and makes a promise to find her. Even ''ComicBook/{{Taskmaster}}'', the TokenEvilTeammate, is pretty shocked to see how broken she is and is clearly concerned for her welfare.

* ''Series/SamuraiSentaiShinkenger'': Kotoha might perceive herself as TheLoad despite her best efforts to improve but the rest of the team digress. She simply doesn't have as much trainning as the rest of them (minus [[ClassClown Chiaki]]). If she is in a serious danger, they will drop everything to save her.
** Mostly averted with Chiaki, who ties with Kotoha as the least experienced team member, but unlike her is an annoying goof with an attitude problem, so he naturally invokes somewhat less protective feelings from the rest of the team.
* ''Series/KamenRiderExAid'': Emu's [[AllLovingHero kind]], [[IncorruptiblePurePureness optimistic]] nature tends to incite BigBrotherInstinct in people around him. [[GoodIsNotSoft He]] is a capable [[TheChessmaster strategist]] and [[BatmanGambit manipulator]], but most of all, he wears his ideals and heart in the open, which makes him an easy [[BreakTheCutie target]]. The [[DysfunctionJunction CR Crew]] has been dubbed as ''[[FanNickname Emu protection squad]]'', because they will readily drop fighting with each other to help him.

* On ''Series/GeneralHospital'', local MarySue Robin was this to everyone in town. The trope was so deeply in place that when Carly came to town, the first indication that she was going to be a villainous-type was that not only did she dislike Robin, she couldn't understand why everyone else adored her.

* In ''VideoGame/Omori'', Sunny is considered the baby of the group due to him being the youngest.

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her [[TeenGenius technical expertise]] is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had the Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child. Also, threatening or hurting Five is a [[BerserkButton good way]] to make the entire crew [[BigBrotherInstinct want to kill you]].

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her [[TeenGenius technical expertise]] is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had the Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child. Also, threatening or hurting Five is a [[BerserkButton good way]] to make the entire crew want to kill you.

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had the Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child. Also, threatening or hurting Five is a [[BerserkButton good way]] to make the entire crew want to kill you.

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had The Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child. Also, threatening or hurting Five is a [[BerserkButton good way]] to make the entire crew want to kill you.

* On a meta level, Willow from ''Series/BuffyTheVampireSlayer'' - the writers quickly discovered that threatening her was one of the best ways to get the audience to react. An aphorism among the writing staff was "When in doubt, put Willow in danger".

[[quoteright:350:[[Manga/MobPsycho100 https://static.tvtropes.org/pmwiki/pub/images/protectbabbyatallcosts.png]]]]

* Mob of ''Manga/MobPsycho100'' becomes one for the Body Improvement Club, which will rally to his defense without a second thought. The knowledge that he's an insanely powerful PsychicChild appears to have no ruling on this. [[JapaneseDelinquents Onigawara]] even weaponizes the club's protective tendencies by tricking a rival gang at Black Vinegar Middle School into taking him hostage, bringing the Body Improvement Club's wrath down on them.

* This is part and parcel of Piffany's IncorruptiblePurePureness in ''Webcomic/{{Nodwick}}''. For all that Artax and Yeager engage in ComedicSociopathy on ''many'' others, they will not tolerate anyone being mean to her. Their LetsGetDangerous cry is "He/She/They made Piffany cry!"

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had The Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child. Also, threatening or hurting Five is a good way to make the entire crew want to kill you.

* Hikari in ''Anime/DigimonAdventure'' is forced into this position by virtue of being the villain's primary target for her entire introductory arc, well, besides being TheLeader Taichi's actual baby sister. Afterward, her status as the new kid, MysteriousWaif tendencies, suffering a relapse of the illness that prevented her from main character status in the first place, and then trying not to let on because of her selflessness cement it.

* Hikari in ''Anime/DigimonAdventure'' is forced into this position by virtue of being the villain's primary target for her entire introductory arc, well besides being TheLeader Taichi's actual baby sister. Afterward, her status as the new kid, MysteriousWaif tendencies, suffering a relapse of the illness that prevented her from main character status in the first place, and then trying not to let on because of her selflessness cement it.

* ''WesternAnimation/StarWarsTheBadBatch'' has Omega, the newest addition to TheSquad. For one thing, she's literally their baby sister, being the only female clone of Jango Fett as well as the only one who's not fully mature. For another thing, she's the only one who's not trained for combat and is therefore the least prepared to fight against the threats they face. Throw in the fact that she's being targeted by bounty hunter Fennec Shand, and it's a given that [[BigBrotherInstinct her big brothers will be coming to her rescue]].

* ''Series/DarkMatter'': Five, as a sixteen-year-old and the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had The Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child.

* ''Series/DarkMatter'': Five, as the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had The Chance," when Five gets kidnapped, Three asks around for the "kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child.

* ''Series/DarkMatter'': Five, as the only non-criminal member of the crew, tends to be kept on the ship for her own safety most of the time, despite the fact that her technical expertise is extremely useful on the rare occasion she ends up on a mission. This creates the odd dichotomy that the crew both know how competent Five is but still treat her as younger than she really is. In "Wish I'd Spaced You When I Had The Chance," when Five gets kidnapped, Three asks around for the "little kid" he was with. A local who saw her get taken is bewildered, because while she's young, she's also clearly not a child.

Say you’re a villain. You’re up against a team of heroes and you need a sure-fire way to rattle them. What do you do? Well, the best way to get everybody worked up is to threaten ''that'' character, the one who the whole team feels they need to protect. Congratulations, you’ve just found Everyone's Baby Sister (or brother).