History Main / EveryonesBabySister

** Harry is treated as this by most of the adults in the cast, Avengers and associates especially, for most of the first two books, because he's thirteen, more than a tad traumatised, and related to a fair chunk of them. He's less bothered by it than you might think, because he grew up without ''any'' real family.

* {{Deconstruct|ion}}ed in ''Fanfic/ForHisOwnSake''. While Shinobu ''seems'' to have this status among the Hinata Girls, her self-assigned protectors Naru and Motoko primarily use her as an excuse to deliver {{Unprovoked Pervert Payback}}s upon [[ButtMonkey Keitaro]], as they insist AllMenArePerverts and constantly falsely accuse him of making untoward advances upon her. Keitaro [[TheResenter comes to resent]] how Shinobu is too much of an ExtremeDoormat to call them out on this, seeing her as an AccompliceByInaction. And when Shinobu ''does'' [[GrewASpine start standing up for herself]], Naru and Motoko [[FairWeatherFriend instantly turn upon her]]. Shinobu Realized that the girls never really liked her. I would never be protective of her in the first place and just expected her to be a yes-man who agreed with everything they said and used her as an excuse to abuse Keitaro. Shinobu decides to unfriend the girls and call them out on their actions, move in with her aunt, and work on repairing her relationship with Keitaro, whom she apologizes to and promises to stand up for him from now on. By the end of the story, Shinobu becomes a stronger and more assertive person who is really into standing up for her friends like Keitaro; she repairs her friendship with Keitaro, who forgives her because of her apology and shows that she has learned from her mistake by standing up for him. She even repaired her relationship with the girls who realized they were wrong and were willing to change while standing up to the girls who were unwilling to change and remained toxic and horrible.

* {{Deconstruct|ion}}ed in ''Fanfic/ForHisOwnSake''. While Shinobu ''seems'' to have this status among the Hinata Girls, her self-assigned protectors Naru and Motoko primarily use her as an excuse to deliver {{Unprovoked Pervert Payback}}s upon [[ButtMonkey Keitaro]], as they insist AllMenArePerverts and constantly falsely accuse him of making untoward advances upon her. Keitaro [[TheResenter comes to resent]] how Shinobu is too much of an ExtremeDoormat to call them out on this, seeing her as an AccompliceByInaction. And when Shinobu ''does'' [[GrewASpine start standing up for herself]], Naru and Motoko [[FairWeatherFriend instantly turn upon her]].

* The ''ComicBook/JusticeSocietyOfAmerica'' have done this since being revived in TheNineties, and retooled so that, rather than simply be [[UsefulNotes/TheGoldenAgeOfComicBooks 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/StarsAndSTRIPE 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/{{Nightwing}}'': Dick Grayson began as ComicBook/{{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 {{antivillain}}s, like ComicBook/{{Catwoman}}) will ''rain down the hurt'' on anyone who dares to harm Nightwing. ''[[PapaWolf Especially 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 that they wanted to bring upon themselves.
* Aviva Weinberg of ''ComicBook/RelativeHeroes'' is literally the baby sister of her team as it's made up of her siblings. When the Weinbergs help with the invasion of Zandia several members of ComicBook/YoungJustice and their allies make sure to keep her out of the line of fire or at least behind forcefields and bulletproof individuals since she is incredibly young for a superhero, even when compared to the rest of the group which is almost entirely made up of teenagers.
* 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 TheLadette. Oddly enough, the "baby sister" aura even seems to affect other people in the Marvel universe -- for instance, during ''ComicBook/SecretInvasion2008'', 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'' 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/MarvelComicsTaskmaster Taskmaster]]'', the TokenEvilTeammate, is pretty shocked to see how broken she is and is clearly concerned for her welfare.
* [[Characters/MarvelComicsKittyPryde Kitty Pryde]] of the ''ComicBook/XMen'', who might be the closest to an AlternateCompanyEquivalent 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, [[Characters/MarvelComicsJeanGrey Jean Grey]] 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 [[Characters/MarvelComicsCyclops 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, [[Characters/XMen90sMembers Jubilee]] joined and took on a similar role, followed then by [[Characters/NewXMenAcademyX Pixie]] fulfilling a similar role later.

* 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 TheLadette. 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.

* ''[[Webcomic/{{Nijiyon}} Nijyon Animation]]'': Episode 9 has Kasumi hosting a competition for the school idol club to {{Invoked|Trope}} this, particularly to make ''herself'' this since little sisters relate to cuteness, it means being the club's little sister means being the cutest idol in her eyes. Shizuka (a first year and one of the youngest students)), Shioriko and Mia (the latter two already little sisters), and Ai (who has a little sister dynamic with her CoolBigSis figure Misato) are also consider candidates. It's ultimate Rina that's picked as the club's little sister when she wins them over (including Kasumi) with a pair of PuppyDogEyes.
** For the [=R3BIRTH=] trio, Lanzhu considers Shioriko and Mia her little sisters, but the younger girls see ''her'' as the little sister that's a handful.