[[quoteright:300:http://tvtropes.org/pmwiki/pub/images/Sisters_Bond.jpg]]
A common concept, especially in series dealing with romances, is the Red String of Fate (''akai ito'' or ''unmei no akai ito''). The concept is that two people who are destined to be together are attached by an invisible red string bound to their pinky finger (generally, though not always, at the first knuckle from the fingernail).


It is an East Asian belief originating from Chinese legend, with people claiming many different countries of origin and/or religions for it, but the usage is clear regardless. The trope is so pervasive that merely holding up the pinky finger is used as shorthand for girlfriend/mistress/significant other.

''AkaiIto'' (written with the kanji ''kanojo no chi'', or "The Girl's Blood", given the reading of ''akai ito'' in furigana) is also the title of a 2004 DatingSim by Success. The actual red string concept figures into some of the art as well as the story.

The [[FridgeLogic real question]] is: If it's invisible, how do we know it's red?

Warning: [[StrangledByTheRedString Choking Hazard]]. May be related to the PinkySwear. Usually involved in ReincarnationRomance.
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!!Examples:

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[[folder: Anime and Manga ]]

* Played straight too many times to mention, the concept is used for comedic effect in the ''TenchiMuyo'' series ''TenchiInTokyo'', where Tenchi is connected by red strings to just about every major character.
* In one episode of ''[[RanmaOneHalf Ranma 1/2]]'', Shampoo attempts to use an actual magical red string to bind Ranma to her romantically.
** A possible variation occurs in a late manga story revolving around the {{Tanabata}}, where Ranma and Akane will supposedly be destined to marry if two leaves with their names on them remain intact and bound together, but they will never be if either one is destroyed. Cue Ranma having to go through hell, including [[LordErrorProne Tatewaki Kuno]] suddenly coming out of nowhere with a steel bladed katana, to ensure that the leaves aren't destroyed or tied to the leaves of other people.
* Toward the end of the ''UruseiYatsura'' movie "Remember My Love", notorious lech Ataru is shown to have multiple red strings attached to every one of his fingers. It's implied that he might ''like'' to be faithful to Lum, but...
* In episode 5 of ''ExcelSaga'', "The Interesting Giant Tower", Watanabe is surprised (and annoyed) to find his roommates applying for jobs at the same office building he's gone to, and Iwata quips "We must be joined together by the invisible red string of destiny!" Watanabe flips and hits him, declaring, "The red string is for boys and girls only!"
** In the same episode, Watanabe finds that Hyatt, his love interest, is at the same place selling refreshments. She gives him a drink for free, and as she walks away, Watanabe muses, "..the red string!" Sumiyoshi looks at the drink and remarks, "It's green."
* Appears in a flashback of Juri's recollections of her time spent with Shiori and an unnamed male character in ''RevolutionaryGirlUtena''.
* In an episode of ''ChouKuseNiNarisou'', a gay teacher who mistakenly develops a crush on Nagisa suggests to her that there's a RedStringOfFate connecting them. Nagisa can actually ''see'' the string, and yells at the teacher to cut it out....
* Poemi follows the red string tied to her finger to find her friend Futaba after she is captured in ''PuniPuniPoemi''.
* Used as an unseen force in ''AiYoriAoshi'' that binds Aoi and Kaoru together. It was part of the premise that their relationship is so unshakable that neither Kaoru's UnwantedHarem or Aoi's old fashioned and powerful family could pull them apart. It was featured in the opening sequence and referred to as Enishi (The bonds that tie) in a conversation between Aoi and Kaoru in the second season.
** Also, when Mayu first sees Kaoru again, she talks about them being bound by the red string of fate (she's been nursing a crush since their first meeting years earlier). Alas, TheMasquerade prevents Kaoru from telling her his string is already tied.
* In ''{{Nana}}'', Reira writes a song about her seedy relationship with Shin by describing it as taking the red string off someone's finger.
* Tachikawa Megumi's one-shot manga ''Music Box of Spring'' used this; in the end, the characters' hands are cut and bleeding, and the main character's perspective shifts, seeing the blood as the red string.
* ''MamotteShugogetten'' has an episode with mystic threads that bind the fingers of the first two people to pick it up. Although they don't behave much like the threads of the legend, the reference is clear, as the first one to be used is red.
* ''DetectiveConan: The Time-Bombed Skyscraper'' concludes with Ran selecting [[WireDilemma which color wire on a bomb to cut]]; the bomber had designed the bomb to go off if the red wire were cut, having overheard that red was her favorite color, but Ran couldn't bring herself to cut it, seeing it as the red string of fate between her and Shinichi.
* Reversed in ''{{Noir}}'', as Mireille (a Corsican) muses on the connection between herself and Kirika.
-->"The thread that binds you and I is the color black, of this I am sure. [[OverNineThousand Blacker than pitch...blacker than night...blacker than the darkness itself.]]"
* ''YuYuHakusho'': Kuwabara claimed that the way he found his love interest, Yukina, was simply by following the red string tied to their fingers. The anime provides a visual; in reality, he probably just sensed her spirit energy.
* In an episode of the "alien arc" of ''SailorMoon'' (R) Usagi states to her love rival En/An/Ann (urgh, transliteration problems) alias Natsumi Ginga that she is connected to Mamoru by the red string of destiny. Which appears on screen, only to have Natsumi cut it.
* ''KannazukiNoMiko'''s opening features the two heroines tied by a red string. It appears in the show itself in the form of Himeko's bloodied bandage which twirl around the arms of both females [[spoiler: as the gods take Chikane away in the last episode]].
* The opening of ''{{Potemayo}}'' has Mikan wearing a literal red string that supposedly attaches to Sunao, and she makes it clear during the series that she believes she and Sunao are "tied" to each other.
* In ''KimagureOrangeRoad'', as Yukari sings ''Like a salvia flower'' onstage she takes a long red ribbon and playfully wraps a part of it around Kyouske, throwing the other extreme to Madoka.
* The InfinityPlusOneSword of Gepetto in ''ShadowHearts: Covenant'' is the Crimson Thread. At the end of his {{Sidequest}}, it appears between him and his puppet, Cordelia. [[spoiler:The puppet in question was modeled and named after his late daughter, and her soul appears to be inhabiting it, thus their connection.]]
* In the first ending theme of the anime adaptation of ''{{Kekkaishi}}'' there is a line which roughly translates to "there is a red string which connects two people", in apparent reference to Yoshimori's feelings for Tokine.
*''{{Mononoke}}'' contains a variation involving a red cloth between and unborn child and their parents. A much more traditional example appears in the OP, with a red string tied to the pinky finger.
*The first ending to ''ZokuSayonaraZetsubouSensei'' contains lyrics involving the red thread.
* In the manga ''{{Wish}}'', when the main character Shuichiro confesses to his adoptive mother that he loves her, she tells him that she is not the one meant for him, that he needs to find the person on the other end of the string on his finger.
* Essentially the basis of ''BoundBeauty'', only that the characters can see the ''other'' strings of fate (White, Blue, Yellow, and Black, in addition to Red). Leads to some very surreal battle scenes.
* In ''{{Toradora}}'', the class' ProfessionalWrestling show for the SchoolFestival (don't ask) involves them threatening to cut their ChristmasCake homeroom teacher's red string of fate to threaten the heroine. The teacher is naturally upset at witnessing this and tries to attack the play. The audience assumes it's AllPartOfTheShow as the stage hands carry her off.
* In ''TheMikosWordsAndTheWitchesIncantations'', Letty ties an invisible, magical thread to both her pinky and Tsumugi's so they won't get separated. Naturally, it's red, and Tsumugi [[GirlsLove cheerfully mentions its Japanese significance to Letty and how it probably makes them lovers]].
* This becomes a plot-point in ''MahouSenseiNegima'''s summer OVA when Yue (an IneptMage at the time) uses this on Nodoka and Negi, creating a physical red string tying the two together by their pinkies for a day.
* The trope is name-dropped in ''{{Inuyasha}}'' when Kikyou tells Inuyasha that the red string of fate, once cut, can't be restored.
** The final shot in the ED sequence for ''{{Inuyasha}} Kanketsuhen'' shows a literal red string tied to Inuyasha and Kagome's fingers.
* While not actually shown in the anime, one of the DVD covers for {{HappyLesson}} has all the male lead's fingers tied with a red string with all the strings being connected to all his mothers' pinkies. He is not amused.
* The red string of fate has a much darker purpose in ''JigokuShoujo'', where each client of Enma Ai seals the contract with her by ''untying'' a red string. This sends the object of their vengeance to hell -- and damns the client to go there too, after death. So it's still a destiny bond, but a very different kind...
* The end theme of ''Tsuyokiss'' shows each of the girls naked (it's a fanservice show) with a red string tied to one finger.
* [[Yuria100Shiki Yuria]] believes one may connect her and Shunsuke, but it's not on his finger.
** [[IfYouKnowWhatIMean And it's not a red string.]]
* In the ''FullMetalPanic'' manga, Gauron implies that this is what [[HoYay fatefully keeps bringing him and Sousuke together]]. Sousuke [[{{Understatement}} does not react well to the suggestion]].
*In the Manwha {{Bride of the Water God}} Soah receives two of these as a child, and she relates to as to why she's connected to Habaek.
* Used in an official ''[[HigurashiNoNakuKoroNi Higurashi]]'' art, for [[http://i511.photobucket.com/albums/s355/Sokumei/twin.jpg Mion and Shion]] drawn by the Watangashi/Meakashi manga artist. [[{{Twincest}} Make what you will of this]].
* One episode of {{xxxHolic}} revolved around this concept.
* The opening of ''SasamekiKoto'' shows some white strands blowing in the wind, and at one point there's a red one among them.
* In PokemonSpecial, it happened to Red and Yellow 2 times. Both when they first met and the next after 5 years.

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[[folder: Fan Fic ]]

* In the {{Naruto}} Fanfic "One Small Step", Naruto can't find a partner to play Cat's Cradle, a game that could help Naruto with handsigns, and after searching for someone to play this game with him, he finds Hinata and asks her to play with him, now, if you're wondering, Cat's Cradle is a game that involves playing with a type of string, Naruto and Hinata were playing this game, but ended up tying each other's hands together, the result has them become childhood friends, and their feelings start to develop, the string was even colored red. By the way, this fanfic is fairly good, [[http://www.fanfiction.net/s/4139575/1/One_Small_Step go read it!]]

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[[folder: Film ]]

* In ''[[KamenRider Kamen Rider The First]]'', a partially-suicidal Haruhiko runs away from the hospital to a field where he can grieve alone, only to realize that a red string had somehow caught on his clothes. Behind him walks up Miyoko, his love interest, and the string was a thread from the red sweater she was wearing which had caught and began unraveling as he ran. She directly quotes the concept, and he proceeds to hug her for all he's worth. [[spoiler:Unfortunately, since they were both [[IllGirl terminally ill]], things don't [[LoveMakesYouEvil turn out]] [[RedemptionEqualsDeath very well]].]]
* In TheSecretOfNIMH, in what may or may not be an intentional usage: when Mrs. Brisby first meets Jeremy, he is tangled in red string which he is retrieving to build a "love nest" for his future Ms. Right


[[/folder]]

[[folder: Literature ]]

* Seems to be the only thing keeping Bella and Edward together in ''{{Twilight}}'', unless of course love is just [[LoveMakesYouCrazy insanely]] [[LoveMakesYouDumb blinding]] in Meyer's world, because the two really have little in common and their match is unnatural at best and dangerous (especially for Bella...) at worst.
** But they're not Asian...
* In Paulo Coelho's ''Brida'', the titular girl is informed that Witches can recognize who their destined soulmate is because they can see a special twinkle in the eyes, while Mages does so by seeing an star over the shoulder of their destined. Brida, who becomes an aspiring Witch, recognize the twinkle in her actual boyfriend's eyes and is pleased; but the Mage she consulted at first have seen the star over Brida's shoulder, and is conflicted. [[spoiler:This is carried to a long scene where the Mage finally decides to confess his visions and feelings and use the star to try to find Brida in a crowd... and then he finds Brida's boyfriend, who also has the damn star over ''his'' shoulder. This being a NoBisexuals setting, the Mage sets in IWantMyBelovedToBeHappy and lets the happy couple be.]]
* In L.J. Smith's ''NightWorld'' series, soulmates who are destined to be together often describe a silver thread connecting the two of them together.

[[/folder]]

[[folder: Music Videos ]]

* A rather interesting usage of the RedStringOfFate can be found in this [[http://www.youtube.com/watch?v=XoME-rMLa0g music video]] by NanaMizuki.
* The flash PV of IOSYS's [[http://www.youtube.com/watch?v=viPZZYYTSIY Make Us Your Brides]] plays with the imagery by tying [[LesYay Marisa and Reimu to Suika]].

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[[folder: Picture Books ]]

* The picture book ''The Red Thread'' by the children's author and illustrator Grace Lin uses this trope to tell a fairy tale about adoption, of all things. In this case, it connects the adoptive parents and their child; magic glasses which enable the parents to see it allow them to find her. It's pretty sweet if you don't read this article first and end up thinking "Wait, isn't that the thing that they use to justify idiotic relationships in anime?"

[[/folder]]

[[folder: Real Life ]]

* It may be worth noting that in Israel, the red string has an entirely different, non-romantic meaning. So when an old Chassidic guy approaches you with one (and they will... repeatedly, especially in Jerusalem), he's not hitting on you.
*A red string in India is usally a Rakhi and is a physical demonstration of a bond between a brother and sister. It can be tied to any boy a girl considers to be like her brother and is usually used effectively to kill unwanted romantic/love interests.

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[[folder: Tabletop Games ]]

* In ''7th Sea'', when a Fate Witch sees red strands between people with her ''sorte'' magic, those represent conflict (Swords). Blue actually represents romance (Cups).

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[[folder: Video Games ]]

* The recent ''{{Pokemon}}'' games have a red ball of string as an item (called "Destiny Knot" in the English version). Appropriately, if the monster holding this item becomes infatuated, the foe that it "loves" will be infatuated as well.
* In ''TalesOfSymphonia'', TheHero, Lloyd Irving, makes [[VictoriousChildhoodFriend his primary love interest]] a necklace at one point. A look at this item in the Key Items section of the inventory reveals that it is not only heart-shaped, but it is red-stringed as well.
*In the Anime based fighting game ''{{Naruto}}, Narutimate Hero Accel 2'', the character of Chiyo has an Ougi where her attack puppets (Mother and Father, which are actually modified exhumed corpses) are joined by a literal red string, which is then used to viciously lacerate the opponent.
* ''TearsToTiara'''s CMOTDibbler Epona has a mysterious red string worth 99999 gold for sale at her shop. It turns out that [[spoiler:she was using it as SchmuckBait to get the PlayerCharacter to buy it, as it has a LovePotion effect on the people it attaches. Yes, it's [[{{Eroge}} that]] kind of game.]]
* Hakuoro in {{Utawarerumono}} does something like this with [[IllGirl Yuzuha]], though he doesn't recognize the significance. Eruruw does a facepalm, [[ObliviousToLove of course]].

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[[folder: Webcomics ]]

* The webcomic named, appropriately, ''RedString''.

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[[folder: Web Original ]]

* [[http://shiveress.deviantart.com/art/Forevermore-142099586 This]] lovely piece of art here. Perhaps not a traditional example, but it's there, and it's most likely romantic.

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