->''"She loves me. She's like the big sister I never had. Only, you know...short."''
-->--'''TheFlash''' on '''Hawkgirl''', ''WesternAnimation/JusticeLeague Unlimited''

Sometimes, two characters of the opposite sex are very close - so close that you might expect them to be dating. Except they're not. They admit that they matter a great deal to each other, that they would die for each other, that they can't imagine life without each other. They aren't just any pair of friends. They're as close as family. They're like brother and sister!

It's rather sad then, that some people refuse to see the difference between this and a [[MistakenForRomance dating]] relationship. Especially when there may be a distinct age gap between the two characters. The couple is at pains to explain that this isn't the case. They love each other, like a brother and sister love each other, but they're not ''in'' love. They really are "just" friends. Other characters will waste no time in pointing out the one tiny but debilitating flaw with this theory: They are ''not'' brother and sister.

This doesn't change the fact that their love is completely platonic with no sexual attraction on either side. No matter how other people view them, they can't see each other in that light.

The Greek word for this love is ''storge'', as explained in detail in Creator/CSLewis's book specifically on the subject, ''Literature/TheFourLoves''. The fact that this [[BrotherSisterIncest doesn't stop everybody]] is a whole other can of worms all together. RelativeError would be somewhat the inverse of, but definitely comparable to, this trope.

PlatonicLifePartners is a sub-trope, in which the characters are not only close, but form each others' primary relationship. If you can imagine the characters as members of the ''same'' sex and having them as HeterosexualLifePartners, then they belong under PlatonicLifePartners. Of course, almost all instances of PlatonicLifePartners fall under this trope, but to avoid redundancy they should ''not'' be listed on this page.

Simply being friends doesn't make a pair and example nor does just being TrueCompanions. Because most childhood relationships are inherently platonic, friendships between children do not qualify unless they continue into adulthood and remain platonic. Contrast JustFriends for when this does actually blossom into romance. Not to be confused with UnluckyChildhoodFriend in which one side does have feelings for the other.

!!Examples
[[foldercontrol]]

[[folder:Anime & Manga]]
* ''Manga/{{Bleach}}'': Toshiro Hitsugaya and Momo Hinamori were [[AllThereInTheManual raised together]] by the same old woman they refer to as "grandmother", a Rukongai custom where strangers form family groups because it's nearly impossible to find blood relatives.
* Tsubaki and Black☆Star from ''Manga/SoulEater'' could also count. Tsubaki is pretty much like Black☆Star's older sister; Black☆Star is the irritating little kid Tsubaki adores and detests at the same time.
* With the possible exception of [[ChivalrousPervert Sanji and Brook]], all the male Straw Hats in ''OnePiece'' are this to Nami. Robin is more of a TeamMom.
* One could argue that the relationship between [[PowerTrio Natsu, Gray, and Erza]] from ''Manga/{{Fairy Tail}}'' amounts to this. Shipping aside, they interact with each other and protect each other with all the gusto of very close siblings, especially Natsu and Erza. When in a bath, she shows no embarrassment in regards to them being included (due to her upbringing and general lack of a nudity taboo regarding the two) and will occasionally invite them to bathe with her, much to the chargin of any other girls in the bath with her.
* ''MahouSenseiNegima'': Asuna sees Negi as a [[BigSisterInstinct little brother she must protect]]. [[spoiler: In reality, he's probably actually her ''nephew''. Great-Grandnephew anyway, with the number of greats unknown. Point is, she is almost certainly the sibling of one of his direct ancestors. ]]
* The main theme of ''GunslingerGirl'' is the relationship between each team of cyborg girl assassin and [[TheHandler their handler]], referred to as "fratello" (Italian for "brother"). Also seen in terrorist couple Franco and Flanca, who choose their names in a deliberate invocation of this trope.
-->'''Hilshire:''' Say, what did she mean by we should "[[ShipperOnDeck Talk about love]]"?
-->'''Triela:''' I think she's got [[StudentTeacherRomance the wrong idea about us]].
-->'''Hilshire:''' We're ''fratello''. We don't need to talk about love.
* In 6-OVA Animated Prequel to the Japanese monster movies, ''{{Zeriam}}'', known as "Iria: Zeiram the Animation", the title character Iria is shown as an apprentice to her 'older brother' Guren, whom is later believed to be killed by Zeriam, yet hinted at possibly still being alive. During one scene, the orphan Kei asks Fujikuro, "Isn't he her brother, though?" To which, Fujikuro replies, "Yeah, I guess you could say they're like brother and sister." However, the story never really develops further on this comment.
* Hungary and Poland in ''AxisPowersHetalia'' are hinted to be this. Makes sense considering the traditional friendship between the countries in RealLife.
** Can also apply to Switzerland and Liechtenstein though their relationship is more NotBloodSiblings.
** WordOfGod also describes France's and Monaco's relationship like this, at least from Monaco's side. Confirmed when she calls him nii-san, or big brother, in one comic.
* Although it initially appears that there's romantic tension between [[spoiler: Erin and Melan]] in ''BrigadoonMarinAndMelan'', she later reveals that he is like a brother to her.
* At first it looked like Bulma and Yamcha from ''DragonBall'' fame would become an OfficialCouple, but their relationship amounted to this in the end with surprisingly no bad feelings. Yamcha tried to fight for her affections for a while, and he was a bit bummed out that he lost for a time. In the end it looks as if everybody's happy with how things turned out.
** {{Shipping}} and FanPreferredCouple aside, Bulma and Goku have also been friends since childhood and neither has ever expressed romantic interest in the other in-universe. The closest they ever came was when Bulma saw Goku as an adult for the first time and remarked on how handsome he'd turned out, and even that could be interpreted as sisterly affection rather than genuine romantic interest, especially since she also made the same remark about Trunks later on in the series.
* Shizuo and Celty of ''{{Durarara}}''.
* Ban and Himiko from ''GetBackers''. [[spoiler:After spending almost 95% of the series like this, the 37th volume reveals that they might not be completely unrelated after all -- but the exact nature of their blood relationship is not specified.]]
* This is how Flit feels about Emily in ''GundamAge'', but he eventually marries her to make her happy after the girl he really wanted to be with is killed in battle.
* Winry and Edward are this in the first ''Anime/FullmetalAlchemist'' anime. Averted in the manga and in ''Brotherhood'' (the second anime); in these, she has this sort of relationship with Alphonse but is obviously Edward's love interest.
* In ''Manga/AmeNochiHare'', the boys in two couples feel this way towards their younger fiancees (one was an ArrangedMarriage), causing serious trouble for one pair. They were also part of a SiblingTriangle, which complicated things.
* Yuzu and Daisuke from ''Manga/BitterVirgin'' have been friends for years and have this sort of friendship.
[[/folder]]

[[folder:Comics]]
* [[Comicbook/IncredibleHulk Hulk]] and SheHulk, although they are cousins, and were partially raised together.
* WonderWoman and {{Superman}}: they've been shipped together for years (both in-universe and out, to a lesser degree), and are frequently paired up in Elseworlds and {{Alternate Universe}}s, but they've never been anything more than close friends in the main continuity (Though a common AlternateCharacterInterpretation is that while they ''do'' love each other, it's just that Clark loves Lois Lane ''more'', and Diana respects that so they keep their relationship at this level).
** And the reboot turns them into an OfficialCouple.
* Dick Grayson and Donna Troy from the New ComicBook/TeenTitans. They really act like brother and sister and shared leadership of the team. Which is surprising given that he is the ChickMagnet and she looks like a younger version of Wonder Woman. Also, he ''really'' [[HeroesWantRedheads prefers redheads]].
** Dick also sees his relationship with the younger Comicbook/{{Supergirl}} this way. Supergirl, on the other hand, [[http://40.media.tumblr.com/4e7330c5fc7e88f1c6e6c6c4ed7b9ff1/tumblr_n1mznrylgK1rc8doao2_1280.jpg appears to have a different idea of their relationship]].
* Dwight and Miho from SinCity have this relationship.
* {{Storm}} and Comicbook/{{Gambit}} from ''Comicbook/{{X-Men}}'' have had this relationship ever since they met in Cairo. Storm got Gambit into the team and they've been tight ever since, despite Gambit's secrets putting a strain on their relationship.
* Chase Stein and Karolina Dean from the ComicBook/{{Runaways}}. They're close enough that Chase even stopped using "gay" as a pejorative after Karolina came out as a lesbian.
[[/folder]]

[[folder: Fan Works]]
* The ''Manga/ElfenLied'' fic ''FanFic/FamilySticksTogether'' depicts such a relationship between Kaede (aka Lucy/Nyu) and OriginalCharacter Alex. At first, he becomes her OnlyFriend at the orphanage, but within a few chapters, they've become so close that Kaede asks Alex to be her brother, and he happily agrees.
* Roleplay/DCNation takes the Troia and Nightwing dynamic and cranks it to eleven. One of the alternate universe plotlines even implied that they may have been brother and sister in ''several'' of Donna's other "short and unhappy lives."
** In the same universe, Connor Hawke will ''say'' his feelings for Mia (Speedy) are like this...the truth is a bit more complex.
* In ''Titans and the Lost Boy'', Starfire apparently decides that Ryouga is similar to a Tamaranian. This leads to her growing closer to him, which eventually leads to this kind of relationship. Said relationship persists throughout the sequel, ''FanFic/DarkTitans'', and the sequel/crossover with ''FanFic/TheRoadToCydonia'', [[MegaCrossover ''Reflections Lost on a Dark Road''.]]
* In the [[http://www.fanfiction.net/s/6915218/1/Subroutine ''Subroutine'']] FanVerse (Film/TronLegacy / [[VideoGame/TronTwoPointOh Tron 2.0]] PatchworkFic), Jet and Quorra fall into this pattern.
* In ''Fanfic/AStudyInRegret'', [[TheHero Inspector Lestrade]] and [[ActionGirl Mary Watson]] develop this relationship in the story's RescueArc.
* In ''Fanfic/MyLittleCastlevania'', this describes Shatterstorm and Spitfire's relationship. And given Shatterstorm's [[HeManWomanHater usual feelings towards mares]], it's rather refreshing.
* ''FanFic/PoniesOneHalf'': Ranma and Pinkie Pie have this kind of relationship.
* In the ''Literature/WarriorCats'' fic ''[[https://www.fanfiction.net/s/10559134/1/Close Close]]'', Firestar and Sandstorm's canonical romance is described as this, [[DieForThisShip conveniently]] allowing Firestar to mate with Tigerstar. The fact that he mated and had kits with her is glossed over.
* The grown up Godzilla Junior and Mothra Lea became this by time we meet them in ''FanFic/TheBridge''. They've been close friends and allies for over a decade since they first teamed up, able to read each other better than anyone. For all intensive purposes they are a platonic BattleCouple.
** This is in ''huge'' contrast to how their parents got along... or lack there of.
[[/folder]]

[[folder:Film - Animated]]
* WreckItRalph and Vanellope von Schweetz's friendship develops into this.
[[/folder]]

[[folder:Film - Live-Action]]
* ''Film/XMen'':
** In ''Film/XMenFirstClass'', Charles cites this when Raven, feeling insecure about her looks, asks if he would date her... although it falls a little flat coming right after he's answered the question with "of course" in reference to her human form, before she clarifies that she means in her real form. (Charles is being a bit obvious in invoking the trope as the film establishes that she is indeed his adoptive sister.)
** Lampshaded in ''Film/XMenDaysOfFuturePast'', by the older Professor X when he mentions that Mystique was like a sister to him. It's later alluded to when a nurse wonders if the blue, scaly woman at the Paris Peace Accords has a family, and Raven replies, "Yes, she does."
*** On the plane ride to Paris, Charles argues that he raised Raven to be something better than a killer. Erik is quick to point out that Charles didn't ''raise'' Raven, they grew up together. This is what it takes for Charles to realize that Raven is not his to control.
* In the Hallmark version of ''JasonAndTheArgonauts'' Atalanta prepares to confess her love to Jason and is overjoyed when he replies that he loves her too, but has a decidedly different reaction when Jason goes on to say that they are this trope (he actually says "you've always been as dear to me as a brother", ouch).
* Scarlett from ''Film/GIJoeTheRiseOfCobra'' claims she and Snake Eyes are like this, presumably as a way of ShipSinking for any fans who know about their relationship in other continuities.
* According to JohnnyDepp, this is the relationship between Alice and the Hatter in Creator/TimBurton's ''Film/AliceInWonderland''.
[[/folder]]

[[folder:Literature]]
* In ''Literature/LittleWomen'', old childhood friends and neighbors Jo and Laurie ultimately decided to just love each other like brother and sister... which was an obvious choice, since [[spoiler:Laurie had just [[SettleForSibling married Jo's sister, Amy]]... while grieving and contemplating suicide after Jo turned him down.]]
* ''Literature/HarryPotter'': Harry assures Ron in the seventh book that he only loves Hermione like a sister. Until then it was confused for something more by a number of other characters; it was a catalyst in Harry's breakup with [[spoiler: Cho Chang]] and Dumbledore makes a comment in the sixth movie about it. That's not even mentioning all their RealLife supporters; Harry/Hermione was one of the most popular ships in the fandom before ''[[Literature/HarryPotterAndTheHalfBloodPrince Half-Blood Prince]]'', and when J.K. Rowling [[ShipSinking shot it down]] in an interview with Muggle Net, it resulted in massive InternetBackdraft. (And given that it's likely no fandom has ever had a higher CrackShip quotient, lots of people just ignoring the WordOfGod.)
** Doesn't help that J.K. Rowling later said that Harry/Hermione could have worked out better than Ron/Hermione could even as adults.
* Egwene uses this line in ''Literature/TheWheelOfTime'' to make it perfectly clear to Rand that he has no attachments (He agreed, though she thought, incorrectly, that he was mostly putting up a brave face at the time). Followed by her best friend Elayne getting into a relationship with Rand that is most definitely not so. Perrin also says it in an attempt to let Min down easy, before realizing that he needn't because it's not him she's after.
* Princess Andromeda does this deliberately in MercedesLackey's ''Tales of the Five Hundred Kingdoms''. She and her rescuer swear blood-siblinghood to prevent the story from forcing her to fall in love with him. [[spoiler: It turns out it wasn't as needed as it seemed, as they actually ended up swearing ''[[SamusIsAGirl sisterhood]]''.]]
* In the ''[[Literature/HeraldsOfValdemar Arrows of the Queen]]'' trilogy, Herald trainees Skif and Talia try for an adolescent romance but continually find circumstances conspiring against them. Eventually they give up and swear blood brotherhood instead. The inevitable shipping is [[ShipSinking sunk]] once and for all when she ends up [[MindlinkMates lifebonding]] to [[spoiler:Dirk]].
* In the ''Literature/CircleOfMagic'' series, this is the explanation for why none of the main characters are sexually interested in each other. They call each other foster siblings.
* At the beginning of ''Literature/MansfieldPark'', Sir Thomas Bertram is reluctant to adopt his niece [[GenreSavvy for fear]] of KissingCousins. His meddling sister-in-law Mrs. Norris believes raising them like brother and sister will actually be their greatest protection against that trope. [[spoiler:She's wrong.]]
* It's amazing -- you can ''hear'' Mr. Knightley's heart break when Emma uses these words when they're about to dance in ''{{Literature/Emma}}''.[[note]] [[DoubleInLawMarriage His brother is married to her sister]][[/note]].
* In Patricia Briggs's Literature/MercyThompson novels, Mercy's love triangle with Samuel and Adam is resolved when [[spoiler: Samuel, a werewolf, is forced to admit that ''his wolf side'' sees Mercy this way, not as a potential mate]].
* There's a bizarre, amusing variant mentioned in the ''Literature/EighthDoctorAdventures'' novel ''[=EarthWorld=]'': Anji considers the Doctor to be like a sister to her. No, he hasn't regenerated into a woman, but he's the Eighth, who's just shy of [[CampGay Camp]] [[BiTheWay Bisexual]], at least in the novels. She considers him to be [[{{Bishonen}} quite nice to look at]] but not her type, and he very rarely seems to fancy anyone. He does kiss her on the lips later in the book, but that's because he acts as if he had NoSocialSkills and has NoSenseOfPersonalSpace. And he opens up to her emotionally perhaps a bit more than he does to his [[HeterosexualLifePartners Also-Not-Exactly-Heterosexual Life Partner]], Fitz.
* In ''Literature/HellsChildren'', the Damned are this way.
* [[Literature/TheQueensThief The queen of Eddis]] has this type of relationship with her cousin, [[spoiler: Eugenides]]. They find it funny when others imagine them in love.
* Betsy and [[spoiler:Tony]] by the end of ''[[Literature/BetsyTacy Heaven to Betsy]].''
* Horance and Alyss and Will and Evanlyn from ''Literature/RangersApprentice''.
* A "like brothers" example in [[Literature/TheRavenCycle The Dream Thieves]] with Richard Gansey and Ronan Lynch. Local BadBoy [[FoeYay Kavinsky makes comments throughout the book about Ronan]] being in love with Gansey and/or sleeping with him. When he confronts him towards the end of the book, Ronan claims that it's not like that and that he sees Gansey as a brother, criticizing Kavinsky for not being able to see more to relationships than sex.
* Victor and Ginny have this sort of relationship in ''Literature/HonorHarrington'', although it's complicated somewhat by the fact that they frequently go UndercoverAsLovers.
* In Creator/PGWodehouse's ''[[Literature/JeevesAndWooster Thank You, Jeeves]]'', Bertie has to spend a good deal of time insisting that he and Pauline Stoker are this trope. No one buys it because they used to be engaged, even though Pauline is now in love with Bertie's friend Chuffy and Bertie is actively trying to set them up.
* Matteo and Eliza in ''Literature/SomeoneElsesWar''.
* In ''Literature/ChroniclesOfChaos'', Amelia, who has been in love with Victor since day one, has her hopes crushed when he curtly tells [[HandsomeLech Colin]] to "stop molesting his [[SecretProjectRefugeeFamily sister.]]" Victor is ''actually'' tacitly warning Colin to back off.
* In Creator/{{Ted Dekker}}'s book Literature/{{Thr3e}}, Kevin and Sam are this. It's stated that they are best childhood friends and would never, ever jeopardize this. It becomes fairly obvious why there can be no sexual attraction when you find out that [[spoiler: Sam is actually one of Kevin's multiple personalities.]]
* ''Literature/AdventureHunters'': Lisa's feelings for Artorius are complicated to say the least. The age difference is great enough for him [[ParentalSubstitute to be her father]] but they work more like siblings. Regina thinks she's genuinely in love with him.
* In ''Literature/ASongOfIceAndFire'' Tommen and Margaery are married. Tommen is too young and innocent to really grasp what marriage is about, but they ''are'' technically married and he sees her more as a [[BigSisterWorship sister]].
* In ''Literature/TheMortalInstruments'' Simon and Clary come off as this at first, until Simon gains the status of UnluckyChildhoodFriend before moving rather briefly into VictoriousChildhoodFriend and then going back to JustFriends.
** Arguably Jace with Isabelle, with whom he has a purely platonic relationship.
* ''Literature/TheHeroesOfOlympus'' has at least two sets: Piper and Leo (she calls him the annoying little brother she never had) and Percy and Hazel (who gives him a "sisterly kiss" at one point).
** A third set forms (or at least starts to form) between [[spoiler: Reyna and Nico in Blood Of Olympus. Despite both being generally aloof characters, as their quest goes on Reyna ends up having to remind herself that Nico is not a little brother she needs to take care of; both share details of the darker aspects of their pasts that they've never told anyone else; and, to top it off, when Reyna hugs him at the celebration feast, he accepts it rather than pulling away, a show of affection [[HatesBeingTouched Nico]] has reserved only for his sisters.]]
* In ''Literature/TheHungerGames'', Finnick and Johanna. While we are limited to what our first person narrator actually can observe, she considers their "years of friendship" is probably worth more in the end than their in-game alliance. They seem especially close even within the larger BreakfastClub of Hunger Games winners, just judging by the fact that Finnick can get away with hauling Johanna into the ocean and dunking her until she stops screaming. And there's no danger of things becoming romantic, as Finnick is in love with another victor, Annie.
** Gale and Prim have this type of relationship. Katniss also sees her relationship with Gale as being this... until she finds out he sees things differently.
* The Dragonets from Literature/WingsofFire. They've been raised together since birth, and think of each other as surrogate siblings. The only exception is [[TheSmartGuy Starflight's]] crush on [[WideEyedIdealist Sunny]], [[spoiler:but she turns him down specifically because there relationship is too familial.]]
* In ''Literature/RachelGriffin'', Rachel and Siegfried Smith have this relationship. She's a cultured, well-educated member of the English nobility. He's a gamy, street-smart orphan who slew a dragon. [[TheyFightCrime They get into trouble together.]]
[[/folder]]

[[folder:Live Action T.V.]]
* Chloe and Clark in {{Smallville}}, from around Season 5. Chloe used to harbor a childhood crush on Clark, but she grows out of it as she gets older.
* Series/BuffyTheVampireSlayer:
** Buffy and Xander after Season Two. For the first two seasons it's a bit one-sided (Xander's in love with Buffy during this time).
** Xander and Willow also end up like this. They start off more like PlatonicLifePartners, but as the series progresses they drift apart a bit, and form close relationships with other people. They remain part of the same group of TrueCompanions.
* On ''Series/{{Angel}}''
** Cordelia and Wesley bicker and taunt each other mercilessly, but they are good friends, and are always there to defend each other in times of danger. If it wasn't for the accent difference, they could almost ''be'' brother and sister.
** Cordelia and Angel were also like this for the first two seasons of ''Angel'', which led to some viewers being displeased when their relationship changed to a romantic one from partway through the third.
* In the ''Series/BrooklynNineNine'' episode "Tactical Village", Peralta ''claims'' that Amy Santiago is like a sister to him. [[ShipperOnDeck Boyle]] isn't convinced, and Peralta later admits he does have feelings for her.
-->'''Boyle:''' That's what Luke said about Leia.
-->'''Peralta:''' Hey, Luke didn't know! [[SurpriseIncest NO-ONE KNEW!]]
** However, Jake Peralta and Gina Linetti are actually this. She refers to Jake's grandmother as 'Nana'.
* On ''Series/{{NCIS}}'', Ziva tells Ray that Tony and she are like brother and sister. He's [[UnresolvedSexualTension visibly stunned]] (put them together for five minutes and it's kind of obvious this isn't true).
* C.J. and Toby on ''TheWestWing'' are this, rather blatantly, since they're in a group of TrueCompanions that is closely modeled on a nuclear family. How they actually got to be friends (years before the show started) is frustratingly never mentioned, just like [[HeterosexualLifePartners Josh and Sam, or Jed and Leo.]]
* Annie and Augie on ''Series/{{Covert Affairs}}''
* {{Frasier}}: Frasier Crane and Roz Doyle
--> '''Roz:''' You've always been just like a brother to me. Which is weird, I know, because [[BetterAsFriends we slept together...]]
* ''Series/{{Firefly}}''
** Mal and Zoe. They appear to have been PlatonicLifePartners until Zoe married Wash, but since [[spoiler: Zoe unflinchingly chooses Wash over Mal in ''War Stories'']], it's safe to assume that, much like Xander and Willow above, Mal and Zoe's relationship has been demoted. After [[spoiler: Wash dies in ''Film/{{Serenity}}'']], it's quite possible that Zoe and Mal's relationship will return to PlatonicLifePartners status.
*** Though that might have been less Zoe choosing Wash over Mal and more her unflinchingly making a logical decision for the sake of the whole crew: she knew Mal was a lot tougher than Wash and that she could take over his duties if need be, whereas they only had one pilot.
** Also, Mal and Kaylee, and their actors in real life. Leading to this exchange in the BigDamnMovie (though it's somewhat jarring, as both of them have seen each other naked):
--> '''Kaylee:''' Goin' on a year now, I ain't had nothin' twixt my nethers [[ADateWithRosiePalms weren't run on batteries]]!
--> '''Mal:''' [[TooMuchInformation OH GOD! I CAN'T KNOW THAT!]]
--> '''[[YuriFan Jayne]]:''' I could stand to hear a little more.
* Kurt Hummel and Mercedes Jones in Glee. Although the interest in them being a couple is completely gone by episode 3 when Kurt comes out of the Transparent Closet...they stayed the closest (platonic) friendship in the show for quite a while.
* Donna and the Doctor from ''Series/DoctorWho'', although they were often mistaken as a couple. One of the first companions in the revival not to view the Doctor as a romantic interest, these two characters had a very close platonic friendship.
* Guinevere and Merlin became this on ''Series/{{Merlin}}''. They probably have the healthiest relationship on the show, and both were prepared to die for the other within the first four episodes of the show.
** Arthur and Morgana sort of have this, but it's debatable and their relationship evolves over the series. Considering that Morgana is Arthur's father's ward, she's essentially his foster sister. [[spoiler: Actually, she's his half sister, so a literal application of this trope.]]
*** Luckily Mordred already exists in season one and is probably about half Arthur's age at that time, so there will be no need for either Morgana or Morgause to seduce Arthur and bear his child for the sake of the plot.
* Luke and Rani on ''Series/TheSarahJaneAdventures'' are, [[TrueCompanions of course]], very close friends, but there's not a hint of attraction from either side between them. Also, Luke is still pining after [[PutOnABus Maria]] and Rani has rather intense UnresolvedSexualTension with Clyde.
* The bitterness is almost palpable on ''Series/GameOfThrones'' when Catelyn states to Ned that [[UnluckyChildhoodFriend Littlefinger]] is like a brother to her. Ouch!
* Ted and Lily from ''Series/HowIMetYourMother''. Notable in that, since Lily's been Marshall's girlfriend since the day he and Ted became roommates, and Ted and Marshall have been HeterosexualLifePartners for almost as long, Ted and Lily have been basically brother- and sister-in-law since college.
** Also, Marshall and Robin, in contrast to her BetterAsFriends with Ted and WillTheyOrWontThey with Barney.
** Lily and Barney too
* On ''Series/{{Leverage}}'' this plays out between Eliot and Parker with Eliot playing the role of a protective big brother. They even manage to have interesting conversations while on the job:
--> '''Parker:''' What's sexting?
--> '''Eliot:''' I am ''not'' having this conversation with you, Parker.
* ''Series/BabylonFive'': Captain John Sheridan and his NumberTwo, Susan Ivanova, are best friends, confidantes, and comrades-in-arms, and have walked through fire together. There's also not a hint of romantic interest in each other on either side. This is played for pure hilarity when Sheridan has a midnight brainstorm and comes barging into Ivanova's quarters babbling about his brilliant plan, only for Ivanova, who's wearing some fairly skimpy nightclothes, to point out that she might want to go change first. [[http://www.youtube.com/watch?v=51GhNGeKPrA Whereupon]]:
-->'''Sheridan''': Oh, uh, right. Sorry, I hadn't noticed.\\
'''Ivanova''': Thanks, I'll just... wait. What do you mean you didn't notice?? What am I, chopped flarn? I mean, okay, granted, ''I'' don't have any interest in ''you'', and ''you'' don't have any interest in ''me'', but if you're going to come barging in here in the middle of the night the least you could do is say, 'Nice outfit, Ivanova!' and ''then'' go on a tear!\\
'''Sheridan''': [''utterly flummoxed''] Uh... nice outfit, Ivanova!\\
'''Ivanova''': [''stalks away, muttering''] You are such a... [''indecipherable grumbling'']
* After a brief ShipTease, [[HerculesTheLegendaryJourneys Hercules]] and [[XenaWarriorPrincess Xena]] decide they're BetterAsFriends and become this.
* Jess and Schmidt from ''Series/NewGirl''. The prospect of them hooking up has become an object of shame and disgust to them and everyone who knows them.
* ''{{Friends}}'': Joey and Monica in later seasons. Mainly because Monica gets together with Chandler, who Joey considers his "[[{{HeterosexualLifePartner}} brother]]" and the trio form a mini-family within the TrueCompanions. (Monica feeds Joey for years, they include a 'Joey Room' in their new house and frequently act as his older siblings).
** To a much lesser degree Rachel/Chandler and Phoebe/Chandler, though they may be too much of TheFriendsWhoNeverHang to count.
* ''Series/{{OnceUponATime}}'': Red and Charming, particularly noticeable during season two, where she's his [[TheLancer Lancer]] and [[TheConsigliere Consigliere]]. It probably helps that she's his wife's [[HeterosexualLifePartners best friend]].
* Elaine and Jerry from Series/{{Seinfeld}}. They tried dating, but it didn't work out. The show teases them once or twice, but they're mostly just best friends.
* ''{{Warehouse 13}}'': Despite being the two main characters, Pete and Myka repeatedly refer to each other as best friends and are fairly horrified when they believe they might have slept together (they didn't). A few moments clearly show their close-yet-platonic relationship, such as them grasping hands and merrily skipping away like a couple of schoolgirls.
[[/folder]]

[[folder:Song]]
* Subverted by French singer Jean-Jacques Goldman in ''Elle a fait un bébé toute seule'': "I'm like her big brother... A little incestuous when she wants to".
[[/folder]]

[[folder:Theatre]]
* Clopin and Esmeralda in ''Theatre/NotreDameDeParis''. Clopin even calls her "my little sister".
[[/folder]]

[[folder:Video Games]]
* Tidus and Rikku from ''VideoGame/FinalFantasyX''. Rikku is the first person Tidus is able to talk to in Spira and they form a really close bond over the course of their journey. Yuna and Wakka also as they grew up together on Besaid. She actually says that she and Wakka (as well as Lulu) are brother and sister.
** Tidus and Lulu in a way become this as well. Lulu is initially cynical towards Tidus when he joins the group but she is always the one who tells him about Spira and she has definitely warmed to him by the time they get to Guadosalam.
* Vaan and Penelo appear to be this initially in ''VideoGame/FinalFantasyXII'' but the end of the game implies that they might be more.
* In ''KingdomHearts'' Sora seems to have a special bond with [[Disney/TheLittleMermaid Ariel]]. They are certainly much closer than Sora is with the other Disney characters who appear in various worlds. Especially in the first game, Ariel's desire to see other worlds is paralleled with Sora's same desire from the beginning. There's good justification for a romantic pairing except Ariel is canonically paired with Eric in the second game while Sora has overt feelings for Kairi.
* Falco Lombardi and Katt Monroe from ''VideoGame/StarFox''. They're not related, but they've known each other for most of their lives. Their once-ambiguously-portrayed relationship turned out to be this once it became clear in ''Farewell, Beloved Falco'' that Falco [[IncompatibleOrientation isn't into girls]], but they have a sibling-like loyalty to each other.
* ''Franchise/{{Castlevania}}''
** At the beginning of ''VideoGame/CastlevaniaPortraitOfRuin'', Jonathan Morris states that his childhood friend Charlotte Aulin is like his dear sister, much to her displeasure since she doesn't like to be treated like a child.
** In ''VideoGame/CastlevaniaOrderOfEcclesia'', Albus views himself as Shanoa's big brother, complete with KnightTemplarBigBrother tendencies. Whether or not Shanoa feels the same is uncertain since we don't see much of her prior to her memory loss.
* Though it's never outright stated, the male and female leads in ''VideoGame/TalesOfVesperia'' fall into this. Despite numerous ShipperOnDeck moments from other companions in various skits, they never stray from being like brother and sister.
** The same case can also apply with the main hero and heroine of ''VideoGame/TalesOfGraces''. Despite the traditional romantic feelings harboring between the Franchise/TalesOf heroes, this time, the main character's love interest isn't the main heroine (who unfortunately is [[DieForOurShip hit hard by some fans]]), so despite the numerous ShipTease moments, nothing romantic ever occurs between the two of them. [[spoiler: It doesn't help that the main heroine isn't even human.]] In the Lineage to the Future arc, [[TheHero Asbel]] explicitly refers to [[MysteriousWaif Sophie]] like a sister (although in a skit, she refers to him like a father-figure as well - ItMakesSenseInContext).
*** [[spoiler: Eventually Asbel adopts Sophie into his family. Not as his sister, though, but as his ''daughter.'']]
*** Graces also seems to be invoking this trope with one of its win quotes. Asbel refers to himself, his brother, and Cheria - who clearly harbours romantic interests for him - as "Lhant's Triplets of Terror." Cheria angrily retorts, "I am NOT your sister, Asbel!"
* In the ''SonicTheHedgehog'' series, Tails and Amy act like this. Amy's StalkerWithACrush status can make things a bit tense, however.
** On the official Japanese website for VideoGame/SonicTheHedgehog2006, Blaze and Silver's relationship was stated to be like this.
* Akihiko and Mitsuru in [[VideoGame/{{Persona3}} Persona 3]]. Just don't [[ShippingGoggles tell the fandom...]]
* Lucca insists that her relationship with Crono is like this in ''ChronoTrigger''. Whether or not that's entirely true is a matter of some speculation.
[[/folder]]

[[folder:Visual Novels]]
* ''Franchise/AceAttorney'':
** Miles Edgeworth and Franziska Von Karma. This one is quite blatant in that they were ''raised together as brother and sister'', under a family name, not some cliche'd "Raised on the same orphanage" thing. Both parts acknowledge the other as a sibling figure, and Franziska has said Edgeworth was a Von Karma numerous times. This doesn't stop them from bickering, but that doesn't stop blood siblings either.
--->'''Franziska:''' "He's like my little brother."
** Apollo and Trucy seem to fit into this trope perfectly... [[spoiler: Until it's revealed that they, unbeknownst to them, actually ''are'' brother and sister. Half-siblings, but still...]]
* ''CorpseParty'' has Mayu Suzumoto and Sakutarou Morishige. [[spoiler:Sakutarou does ''[[GoMadFromTheRevelation not]]'' take it well when he finds out that the mutilated corpse he's been [[NightmareFetishist obsessing over]] is Mayu's.]]
* In ''VisualNovel/LittleBusters'', if you don't get together with the main heroine Rin, she and Riki stay friends like this.
* In ''VisualNovel/UminekoWhenTheyCry'', Shannon and Kanon's relationship is like this. [[spoiler:It's eventually made clear that they're actually the same person, created as alter egos of Sayo Yasuda; Sayo even created Kanon to be a "little brother" for Shannon.]]
[[/folder]]

[[folder:Webcomics]]
* BittersweetCandyBowl has Mike and Lucy when they are younger, though they later develop romantic interest in one another. Paulo claims to feel this way about Daisy, and Daisy seems to feel this way about Paulo, but there are some hints that Paulo, at least, is somewhat interested in his friend. Mike also sees Daisy this way, much to her frustration.
* Trigger and Layla in ''FarOutThere'' are most emphatically [[http://faroutthere.smackjeeves.com/comics/1027274/page-28-i-dont-think-thats-very-funny-at-all/ in this sort of relationship]].
* In ''SomethingPositive,'' Davan and Aubrey are like this, especially since they've known each other long enough for the Westermark Effect to be in place.
** Davan and Pee-Jee are an almost as good example, although they haven't known each other nearly as long and Davan had a crush on her prior to the comic's beginning. Davan even refers to her as Mei-Mei (Chinese for "little sister") at one point.
* Creepknight and Bowler certainly seem to reflect this in ''VoodooWalrus''. At very least, they [[http://voodoowalrus.com/?p=1844 argue like brother and sister]].
* ''Webcomic/TheOrderOfTheStick'': Roy and Haley. Also, assuming [[AmbiguousGender Vaarsuvius]] is a guy, him and Haley as well.
* ''Webcomic/{{Homestuck}}'' has [[KnightInSourArmor Karkat]] [[HatesEveryoneEqually Vantas]] and [[TeamMom Kanaya]] [[LipstickLesbian Maryam]]. Karkat is a raving, permanently angry misanthrope who hates everyone, including his [[TrueCompanions morails]], his [[LoveInterest matespirit]] and even [[IHatePastMe him]][[FutureMeScaresMe self]], but he will never get mad at Kanaya and is a JerkWithAHeartOfGold through and through. Similarly, while Kanaya can sometimes be condescending and aloof she's mostly a [[NiceGuy Nice Girl]], and rarely raises her tone to Karkat. If either needs advice or support they talk freely. Since Trolls have no formal definition for siblings, they refer to each other as "best friends".
* In ''Webcomic/{{Sinfest}}'', [[http://www.sinfest.net/view.php?date=2009-04-17 Fuchsia feels afraid that Criminy will give her this.]]
* In ''Webcomic/ElGoonishShive'', when Elliot tried to assess why his recent feelings toward another girl are different from his feelings towards his girlfriend, Sarah, he [[http://egscomics.com/?date=2013-04-04 suddenly realized]] that he sees her more like a sister than as a girlfriend, but had been oblivious to it all that time.[[note]]Ellen had [[http://www.egscomics.com/?date=2013-03-12 realized this]] about herself shortly after discovering she couldn't be with Sarah but wasn't sure if Elliot felt the same way[[/note]] While his girlfriend didn't feel the same way about him, she ultimately wasn't too disappointed as she had her [[http://www.egscomics.com/?date=2013-02-22 own reasons]] for wanting to break up with him.
* Billie and Walky in ''Webcomic/DumbingOfAge''. They've known each other since childhood (though Billie avoided him in high school), bicker near-constantly, and Billie seems to view Walky as her AnnoyingYoungerSibling. They tend to act [[http://www.dumbingofage.com/2011/comic/book-2/01-pajama-jeans/something/ angry]] or [[http://www.dumbingofage.com/2013/comic/book-4/01-the-only-dope-for-me-is-you/supererawesomer/ nauseated]] when someone suggests they could be a couple.
** Even Walky's actual sister Sal acknowledges this, telling Billie she's the "...daughter [our parents] like" and smiling when Walky tells her he wants to be a good brother--to ''Billie''--as a backhanded way of acknowledging he hasn't always been a good brother to Sal.
* Da-Jeong and Min-Seong are like this in ''Webcomic/TheFriendlyWinter''. The manga has implications of their parents [[RomancingTheWidow pairing up]] so they could literally end up siblings one day.
[[/folder]]

[[folder:Web Original]]
* Apollo and Calliope in ''ThaliasMusings'', except on rare occasions when Calliope is drunk.
* WebVideo/TheNostalgiaChick and WebVideo/TheNostalgiaCritic, as well as their real life counterparts (Doug Walker and Lindsey Ellis) have been described as such.
[[/folder]]

[[folder:Western Animation]]
* Flash and Hawkgirl in ''WesternAnimation/JusticeLeague''. Any flirting between these two can be entirely attributed to Flash's tendency [[CasanovaWannabe to hit on]] [[HandsomeLech anything in a skirt]] ([[ComicallyMissingThePoint Hawkgirl never wears those, though...]]), and even that stops by the shift to ''Unlimited''. He even describes her as being like his "big sister" in the final season of the series.
* Also from ''{{DCAU}}'', this is how [[{{Superman}} Clark Kent]] seems to have come to view his ex Lana Lang, though she threatens to go back to LexLuthor if he ever calls her that.
* Lance and Illana from ''SymBionicTitan'' poses as siblings in their high school. Gennedy Tartakovsky said before there was to be no romance between those two.
* Terry (Batman) and Maxine in ''WesternAnimation/BatmanBeyond'' have this, being really really close. Although many fans think they'd just be better off dating, neither characters actually show any interest in the other that way aside from a teasing banter here and there.
** WordOfGod states that one writer suggested [[WhatCouldHaveBeen making them a couple]], but the creator decided to have them stay purely as friends.
* Played with in ''HarveyBirdmanAttorneyAtLaw'':
--> '''Birdgirl:''' You realize there's absolutely no chance we'll be kissing, right?
--> '''Peanut:''' Yeah, duh, of course; you're like my sister. (pause) Which given a little thought could be a very hot concept.
* The titular character and Ingrid Third in "Fillmore" are the Safety Patrol's best officers and friends.
* Henry and June from ''KaBlam'', [[http://s1.zetaboards.com/The_KaBlam_Forum/topic/4265635/1 according to]] WordOfGod.
* In the ''BrandyAndMrWhiskers'' theme song, the eponymous duo are described as "like a dysfunctional brother and sister."
* On ''GravityFalls,'' [[CloudCuckooLander Mabel]] describes [[EnfantTerrible Gideon]] as "a little sister I can do girly things with." Unfortunately, he feels [[VillainousCrush differently]] about the situation.
* In ''MyLittlePonyFriendshipIsMagic'', [[SociallyAwkwardHero Twilight's]] relationship with [[TagalongKid Spike]] has been portrayed as either this trope, PlatonicLifePartners, or with Twilight being a ParentalSubstitute toward Spike, DependingOnTheWriter. One thing that remains perfectly clear though is this; they are utterly inseparable. In fact, Spike's CrowningMomentOfHeartwarming comes when he has to face his worst fear in the Season 3 premiere: Twilight not needing him anymore and sending him away.
* In the ''WesternAnimation/AvatarTheLastAirbender'' episode ''The Ember Island Players'', the ShowWithinAShow portrays [[KidHero Aang]] and [[TeamMom Katara]] as this. Aang, who has had a crush on Katara since Episode 1, freaks out and begins to wonder if Katara really thinks of him this way.
** Katara and Zuko are actually this [[FanPreferredCouple (despite what some fans think)]]. Just compare their interactions to Katara's interactions with her actual brother.
* ''GaspardAndLisa'' (from the AllCGICartoon based on the illustrated books) are much like brother and sister. They met at school and are almost inseparable, perhaps since their personalities click very well. Although, the nature of the dialogue-heavy drama that unfolds between them (always resolved by the end of an episode, of course) makes them look a whole lot LikeAnOldMarriedCouple despite being kids.
[[/folder]]

[[folder:Real Life]]
* The alternative name for this trope, the WestermarckEffect, is after Finnish sociologist Edward Westermarck, who did very thorough research on the incest taboo and found that sibling incest, father-daughter incest and mother-son incest are extremely rare in monogamous cultures around the world, and that this effect extends also to stepchildren adopted in very early age. The same effect has also been discovered on many animals, especially birds.
* This is quite common in real life amongst childhood friends. Studies show that children who know each other during their early childhood will rarely develop any romantic interest later in life. It's hypothesized that this is part of an instinctual mechanism designed to minimize the possibility of [[IncestIsRelative inbreeding]]. It's called [[http://en.wikipedia.org/wiki/Westermarck_effect Westermarck effect]]. But do Middle/High schoolers with those two friends who have known each other since preschool care? Nooooooo....
* LeonardoDiCaprio and KateWinslet, having been very close friends since''Film/{{Titanic}}'' and collaborating again in ''Film/RevolutionaryRoad'', remain this and nothing more. [[ActorShipping Shippers]] disagree. Kate's kids call him "Uncle Leo", and for a kissing scene in ''Revolutionary Road'', Leonardo stated that it felt slightly weird because kissing Kate was like kissing a family member.
* ''Film/HarryPotter'' actors RupertGrint and EmmaWatson said it was weird to kiss each other for the eighth and last movie because they had grown up together since the first one and thought of each other as brother and sister. Same when Emma had to kiss DanielRadcliffe (though the relevant scene itself was already decidedly unpleasant in context).
* Arguably the luckiest of King Henry VIII's wives was [[http://en.wikipedia.org/wiki/Anne_of_Cleves Anne of Cleves]]. Misled by flattering portraits on both ends and a need for a political alliance, they married. As soon as it was time to consummate things, the pair found out that there was absolutely ''zero'' attraction and Henry opted for an annulment. Anne was sensible enough to sign the annulment papers with all due haste (and probably a sigh of relief); she thus kept in good standing with Henry, who liked her very much as a person even though there was no physical attraction, and became known as the "King's beloved sister." She was invited to all the events at court, and was close to both Princess Mary and Princess Elizabeth.
* David Faustino denied that there was ever any romance between him and Christina Applegate on ''MarriedWithChildren'', instead defining their relationship as this trope.
* Creator/JennetteMcCurdy has specifically said that kissing Creator/NathanKress feels like kissing a brother, and it's part of the reason some fans see the relationship of Sam and Freddie in the 5th season of ''Series/ICarly'' as being subject to ShippingBedDeath due to the lack romantic chemistry.
* During an interview with Creator/CraigFerguson, JetLi stated that his fellow actress MichelleYeoh, whom he had quite some history working with, is "Like a brother to me".
* You could describe the relationship between Creator/JohnnyDepp and Creator/HelenaBonhamCarter like this.
* Creator/NathanielParker, the title character of ''TheInspectorLynleyMysteries'', [[http://www.pbs.org/wgbh/masterpiece/lynley/parker.html outright stated]] that he sees co-star and close friend Creator/SharonSmall (Barbara Havers) as his little sister. Which did not, it must be noted, stop him from [[ShipperOnDeck shipping]] [[FanPreferredCouple their two characters]] like it was going out of style.
* Bradley [=McIntosh=] and Rachel Stevens out of ''SClub7'' remarked that having to kiss in the movie ''Seeing Double'' made them react like this. In the movie Bradley is supposed to be attracted to a clone of Rachel but not the real one, and in interviews he said filming the kiss scene was like kissing his sister.
* Jack White and Meg White of TheWhiteStripes are actually ex-husband/ex-wife, but referred to themselves as siblings. Not like siblings. But as siblings. Let that sink in.
* Lesbian women and homosexual men very often develop sibling-like relationships with their friends of the opposite sex.
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