->'''Luke''': You know, when we were fighting those sentinels down there, something happened to me. To us. We were so close in the Force that it was like we'd become a single person. It was... it was something very special.\\
'''Mara''': Really? How special?\\
'''Luke''': You're not going to make this easy for me, are you?
-->-- ''Franchise/{{Star Wars|ExpandedUniverse}}: [[Literature/HandOfThrawn Vision of the Future]]''

This is a romantic trope where lovers share not just their lives and beds but actually [[PsychicLink their consciousness]]. Most often they're from an already [[PsychicPowers telepathic]] race, but this telepathy goes even further; maybe they're always aware of the other, not just when communicating but ''always''; or they understand each other better than anyone else; or they actually feel exactly like the other, or something like that. Sometimes successful reproduction is tied to it. Sometimes [[MoralityChain the sanity of one,]] usually the male, or both partners depends on the mindlink. Often the link is not unsoliticious. [[{{Synchronization}} It goes both ways, so if something bad happens to one of them...]]

It's doubtful whether real humans could take this for a half an hour, but anyway, it's often presented as superior to a normal relationship, more fulfilling or close or "true". It can also be taken as a "metaphor".

This is a subtrope of FantasticRomance. Also see: MentalAffair.

[[folder:Anime & Manga]]
* Kouichi and Keito from ''CatStreet'' are a little like this.
* ''Manga/DragonBall'': After [[spoiler:Vegeta's [[RedemptionEqualsDeath self-destruction to stop Majin Buu]]]], his wife Bulma is shown to sense his death long before it was actually confirmed to her.
* Makoto Mizuhara does this with Ifurita at the end of the ''Anime/ElHazardTheMagnificentWorld'' [=OAV=]. He's capable of [[{{Technopath}} synching]] with El Hazard technology, and she's a [[RidiculouslyHumanRobots battle-gynoid.]]
* The protagonists from Seo Kouji's oneshot, ''HalfAndHalf'' get linked this way by the local variant of Kami-sama as part of a life-extension deal in which they had to decide which one would die. This system was partly to keep them from trying to off one another and partly so that the one to die would have more miles under the metaphorical belt. There seems to be a feedback filter implied somewhere.
* In ''Anime/HidamariSketch Honeycomb'''s Episode 3, [[HeterosexualLifePartners Hiro and Sae]] [[https://www.youtube.com/watch?v=9nBz0URYr3I are shown to be able to communicate like this.]] Their mental conversation appears on the screen [[VoiceGrunting accompanied by beeps.]]
* One episode of ''LightNovel/KinosJourney'' touched upon this concept, [[DeconstructedTrope with less than desirable results.]]
* Played straight with Lalah Sune and Amuro Ray from ''Anime/MobileSuitGundam''. Both became attracted to each other because of their mind link connection, and were noted as the first of their kind to become Newtypes. Even after Lalah's death, Amuro was still strongly connected to her. It's also said Lalah was Amuro's first great love.
** This routinely occurs in the Universal Century between powerful Newtypes, and ''never'' ends well. In ''Anime/MobileSuitZetaGundam'', Kamille Bidan and Four Murasame fall into love because of their emergent Newtype abilities, but Four is simply too insane from her Cyber-Newtype conversion to enter into a functional relationship, and she [[spoiler: dies in his arms later]]. From the same series, meanwhile, Paptimus Scirocco intentionally manipulates Newtype women to his side through his mental power, but doesn't reciprocate their affections and only uses the situation to manipulate them.
** In ''Anime/MobileSuitGundamZZ'', Judau Ashta is an absolute ChickMagnet, though his strongest relationship (with Elpeo Ple) is more of a brother-sister relationship (though Ple is unusually intense about it). Meanwhile, Haman Khan is attracted to him, but unable to handle her emotions properly, and Judau repeatedly rejects her.
** Char Aznable gets a section of his own, as his inability to relate to others causes much of the conflict in the various stories. When it came to Lalah Sune, he was almost as infatuated with her as Amuro was, and Lalah reciprocated, but that didn't stop him from subjecting her to horrific MindRape. Later in life, he was Haman Khan's first crush, but he completely failed to notice that, and combined with what Haman saw as his abandonment of his duties, broke Haman and turned her into the villainous commander of Neo-Zeon. Then Reccoa Londe attached herself to him, and they kissed at one point, but he never actually felt anything for her, and Reccoa's realization of this [[spoiler: led to her FaceHeelTurn]]. Finally, in ''Anime/MobileSuitGundamCharsCounterattack'', he's become no better than Scirocco, callously manipulating a thirteen-year-old girl into thinking he loves her and using her as a weapon.
* ''Manga/{{Naruto}}'' has an {{Implied|Trope}} variation in Chapter 677, during the series' climactic battle against the BigBadEnsemble. Naruto is able to [[TheEmpath sense people's emotions]] to some degree. At some point in the battle, he is transported to a relatively safe phased-out dimension while the rest of his allies are back in the regular dimension, falling to the influence of the [[LotusEaterMachine Infinite Tsukuyomi]] one by one. The last person shown is Naruto's [[ShipTease maybe-possibly]] LoveInterest Hinata, who mentally calls out to him in despair. The very next panel shows Naruto in the other dimension, suddenly looking very alarmed and eager to jump right out of the safe dimension, which his more level-headed RivalTurnedEvil Sasuke wisely stops him from doing. To fully appreciate this nugget, one needs to understand that: 1) It is not known to what degree exactly Naruto's power is supposed to work across dimensions. 2) The audience is, technically, free to interpret that moment as Naruto reacting to ''everyone's'' plight, not just Hinata. 3) Point #2 is a [[LoveYouAndEverybody recurring theme]], and at this point the author is eligible for a lifetime achievement award in [[TrollingCreator pulling the legs]] of the series' fans who [[{{Shipping}} have any kind of emotional stake in where all of this is going]]. In retrospect? [[spoiler:[[OfficialCouple It was indeed this trope]]]].
* In ''Manga/PsychicAcademy'', Ai and Mew form a mental link due to their auras being 100% compatible. This causes considerable awkwardness due to the fact that Ai is dating Orina, Mew's roommate and Ai's childhood friend (The most extreme point being an evening at a LoveHotel being ruined because Ai realizes that Mew is in danger). The psychic who is able to measure aura compatibility does make a point of mentioning that aura compatibility is not the same thing as personal compatibility, citing two classmates whose auras are only 30% compatible but are utterly smitten with each other as an example. [[spoiler: He eventually does choose Mew over Orina--but only just before she dies]].
* Ashura and Yasha in ''Manga/RGVeda''. Thanks to their swords, Shurato and Yamato, being connected, they share a special psychic link, but it only started to manifest after Shuratou was stored into Ashura, effectively making Ashura a part of the sword in someway. This was useful to found Yasha in the ice fortress when Aizen-myoh kidnapped him and to know that Yasha was in danger when Rasetsu returned.
* In ''Franchise/SailorMoon'', Mamoru and Usagi can feel each other's pain and Mamoru knows when Usagi is in trouble--it's actually a plot point when he doesn't even know that he's rushing to her defense as he blacks out and becomes Tuxedo Mask. In the [[Anime/SailorMoon first anime]] there's also a one-episode character (Rhett Battler) who knows when Luna is in trouble, but it's mostly used as a humorous homage to Mamoru.
* In ''Manga/{{Sekirei}}'', the [[IncrediblyLamePun tit]]ular aliens have an empathic bond with their [[RedStringOfFate destined]] partners, called Ashikabi. Beyond sensing the emotions of their partner, it's been shown that an Ashikabi can sense when their Sekirei is terminated in battle.
* Downplayed in ''Manga/SoulEater'' where partners can combine their souls using Soul Resonance. With the exception of Maka's parents and possibly [[spoiler: Stein and Marie, at one point in time]], none of the teams are actually dating. One of the more blatant examples of ShipTease from the series, however, happens when Maka visits Soul's soul, has a moment of SheCleansUpNicely, and the two dance. Soul is also able to read Maka's thoughts.
* Van and Hitomi in ''Anime/TheVisionOfEscaflowne''.


[[folder:Comic Books]]
* Coagula and Robotman in the Rachel Pollack run of ''Comicbook/DoomPatrol''.
* The elves of ''Comicbook/ElfQuest'' are telepathic, but they can form an even closer bond where they undergo "Recognition" of each others soul and body's capability to mate and a need to mate. This leads to the affected pair mating like bunnies, so possibly the body is involved as well as the soul. This can also happen even if the couple don't like each other, or one is already in a relationship, which can lead to awkwardness. Or more often, threesomes. [[WordofGod The Elfquest Gatherums]] have specifically stated that Recoginition is strictly for reproduction; the series indicates those who Recognize and lifemate are far more likely to have more then one child--or any child--than a non-Recognized couple. The only exception to this rule are the Go-Backs, who don't need Recognition to make more babies since they've essentially discarded most kinds of elf "magic".
** Also, Skywise and Cutter recognized, even though they are both male, because they already shared a soul.
** Nightfall and Redlance aren't technically Recognized, but when Nightfall had to heal Redlance's mind by bonding with him she managed to merge their souls permanently.
* In ''Comicbook/{{Empowered}}'', [[HoYay Sistah Spooky and Mindf** k]] were these once. It's really the only way that Mindf** k can have good sex.
* This is a tradition of ComicBook/TheEternals, when they get married. Sersi, defying traditions chose the Black Knight (a human, instead of an eternal) as her "Gann Josin", and got the link. But Dane was not asked if he wanted the link, and certainly did not.
* Downplayed in Comicbook/{{Supergirl}} story ''Comicbook/DemonSpawn''. There was not telepathy involved per se, exactly, but Supergirl and [[TemporaryLoveInterest Geoff]]'s minds were bonded somehow, and that bond gave strength to Supergirl to break free when a villain was taking over her body.
-->'''Supergirl:''' It was someone entering my mind, letting his thoughts flow in with mine that allowed my will to live to ultimately win!
* ''Franchise/XMen'':
** While their marriage was still blissful, ComicBook/JeanGrey and [[ComicBook/{{Cyclops}} Scott Summers]] had a form of this.
** Scott and his [[StrangledByTheRedString instant replacement interest]] ComicBook/EmmaFrost have a version of this.

[[folder:Fan Works]]
* The concept of sparkbonding (the merging of "sparks", the Transformer equivalent of a soul) is used in a lot of ''{{Transformers}}'' fanfiction. However, the concept has never been used in canon.
* In a lot of ''Manga/DragonBall Z'' fanfics, this trope has become so common that it is {{fanon}}, [[MostFanficWritersAreGirls despite the fact that the series is possibly the LEAST romantic series of all time]] and that fanon applies this trope to either Vegeta or Goku, who are definitely NOT the best candidates for this, to say the least.
** In Vegeta's case, this idea came from a scene set during the Buu arc where Bulma seems to sense that something bad has happened to him... he blew himself up.
* Frequently used in FanFiction, especially in the ''Literature/HarryPotter'' fandom.
** Very prominent in the "Fanfic/{{Dangerverse}}" between Remus and Danger.
** Harry/Ginny is also a popular target--[[http://dukebrymin.livejournal.com/43809.html someone made a list,]] and it's long.
** To list the number of Drarry creature fics that declare this is true of Veela and their mates would take the better part of a month.
* ''Fanfic/ACrownOfStars'': Asuka's [[TransformingMecha Red Whirlwind]] is a two-seater vehicle with a control interface that allows telepathic communication between the two pilots. Shinji and Asuka find "interesting" uses for the telepathic mind-link.
* ''Fanfic/SurrogateOfZero'': In this fic Asuka [[spoiler:died by childbirth,]] but her soul is connected to Shinji and both share a mind-link.
* Also turns up a lot in the ''Franchise/StarTrek'' fandom, mostly [[Series/StarTrekTheOriginalSeries the original series]] and ''[[Series/StarTrekEnterprise Enterprise]]'', because of the Vulcan cast.
** [[SlashFic Kirk/Spock and Spock/[=McCoy=]]] fic, in particular, make a Very Big Deal out of the "mindlink" aspect--in K/S, Kirk is generally portrayed as very enthusiastic about the bond. In contrast, S/Mc often makes an issue of [=McCoy=]'s distaste of the mind-meld and his eventual acceptance.
** The trope is discussed in ''[[http://cosmicduckling.com/spirk/smile.html His Golden Smile]]'' [alternative link [[http://www.ksarchive.com/viewstory.php?sid=934 here]]], between an elderly Spock and his student.
-->"When planned for and dealt with properly, it is reduced from a chimera to the simple, sweet cement of a bonding. We have extra reason to love our bondmates, we Vulcans--more so than any other species in the galaxy. They give us life as they give us love."
* Occurs fairly frequently in ''Literature/TheLordOfTheRings'' fanfiction as well, especially with elves--but then there is some vague {{canon}} evidence for telepathy.
* This is quite common with ''Series/DoctorWho'' fanfiction too, particularly with Doctor/Master. Their [[spoiler: mind meld]] hasn't hurt matters. Most people just assume that any Time Lord marriage-relationship-thing of more than a passing nature must needs also involve a mind-meld-y telepathic Bond which tends to be Capitalized. There are legions of Rose/9 or /10 fics in which this is the case.
** Also a fair amount in ''{{Series/Torchwood}}'' fics, mostly for Jack/Ianto and usually including Ianto having some sort of super-empathic powers.
* Turns up in a couple of ''Series/TinMan'' fics, where it's {{handwave}}d as a means for an Ozian sorcerer/sorceress to focus and replenish their magic. The Lavender-eyed Queen and Ahamo (or, rarely Glitch) are usually depicted as having this kind of bond, but it also turns up in DG/Cain fics.
* Fanworks from ''Series/TheSentinel'' often have some sort of empathic/telepathic link between Jim & Blair; there is a whole subgenre of 'bonding fics' that are almost-but-not-quite Slash.
* The Horseshoe Nail series for ''Series/{{Firefly}}'' had [[spoiler: River accidentally pulling one of these with Jayne. Neither were amused when they found what had happened.]]
* ''FanFic/MyInnerLife'' gives "PsychicLink" a whole new, disturbing meaning.
* ''FanFic/{{Amelia}}'' features this between a lesbian and a straight girl. It doesn't influence her sexuality, just romance, which causes issues. Largely PlayedForDrama, with several characters questioning how much the link is influencing their personalities [[spoiler: and catastrophic changes when it's removed.]] In the finale, [[spoiler: the world is restructured to feature hundreds of MindlinkMates.]]
* In the ''[[VideoGame/TheLegendOfZeldaTwilightPrincess Twilight Princess]]'' fanfic "[[FanFic/TilTheSunGrowsCold Til the Sun Grows Cold and the Stars Grow Old]]," Link and Princess Zelda have met in dreams since they were very small children, which is part and parcel of their targeted reincarnation love affair of many lifetimes. Its true significance comes at a point when [[spoiler:Link thinks Zelda might be dead, and the fact that he can't find her in his dreams only seems to prove it]].
* In the ''Snapped'' offshoot of ''Fanfic/{{Team 8}}'', this is implied--Naruto is killed, but manages to hook his consciousness onto that of the Kyuubi as it leaves his body for Itachi's, and then when this kills Itachi both enter and inhabit Hinata (who is still young enough, unlike Itachi, for her chakra coils to stretch enough to survive the Kyuubi's chakra). Later it is stated that Hinata "always has very interesting dreams".
* As stated below, WesternAnimation/DannyPhantom and Sam were supposed to have such a link [[WhatCouldHaveBeen/WesternAnimation in the original premise of the series]], only for it to be jettisoned. Apparently, [[http://www.fanfiction.net/s/4021512/1/Shadow_of_a_Doubt some fan writers have decided to]] [[http://www.fanfiction.net/s/6197915/1/Danny_Phantom_A_Family_Thing plug it into]] [[FanFic/FacingTheFutureSeries their stories]].
* In ''{{FanFic/Total Drama Comeback|Series}}'', [[CrackPairing Ezekiel and Heather]] have complimentary dreams about each other. In this case, is not explicitly supernatural, it just sort of marks their growing feelings and CharacterDevelopment.
* ''FanFic/InTheService'' provides a rare example of a negative portrayal of the trope. [[Franchise/LyricalNanoha Wolkenritter]] in skin-to-skin contact are no longer individuals in a meaningful sense. They find this both frightening and unpleasant, and consequently inter-Wolkenritter romances don't work.
* The ''WesternAnimation/TeenTitans'' fanfiction ''[[http://www.fanfiction.net/s/3427267/1/As_the_dust_settles As the Dust Settles]]'' begins an entire series where this plays a huge plot point for Starfire and Robin. Be warned, the stories are rated for a reason.
* In this ''WesternAnimation/InvaderZim'' story, ''[[http://www.fanfiction.net/s/5863316/1/I_think_Im_in_love_with_Zim I think I'm in love with Zim]]'', has its own interesting explanation for how this works between Zim and Dib. It's later PlayedForDrama[=/=][[{{Deconstruction}} Deconstructed]] [[spoiler: when Zim is killed]].
* ''{{Series/Supernatural}}'' fandom took Cas' canonical telepathy, the [[HoYay "profound bond" comment,]] and the fact that Cas literally left a brand on Dean's body, and ran with it. Often, it's one-way (Cas can sense Dean, not the other way around), and for whatever reason Cas doesn't bring it up--at least until the events of the given story.
* In the Franchise/{{Digimon}} fanfiction series, ''Fanfic/AStickySituation'', [[spoiler:the Renamon line]] apparently form these types of bonds.
* This concept is explored deeply in the ''Haikyuu!!''/''Film/PacificRim'' crossover fanfiction ''[[http://archiveofourown.org/works/2074782/chapters/4512390 But for Me, There is a Storm,]]'' where the Drift, or psychic connection between pilots, is a big part of all relationships between copilots.
* ''Film/XMenFirstClass'': The fic ''[[https://www.fanfiction.net/s/7380995/1/Charlotte-Francine-Xavier Charlotte Francine Xavier,]]'' has this develop between Erik and Fem!Charles.
* ''Fanfic/ThousandShinji'': As they develop PsychicPowers, [[BattleCouple Shinji and Asuka]] become this. When they fought [[EldritchAbomination Leliel]], their minds virtually became one.
* In the Phineas and Ferb fanfic ''[[https://www.fanfiction.net/s/9227752/1/Two-Halves-Make-A-Whole Two Halves Make A Whole,]]'' Doofenshmirtz makes an Inator that merges the souls of any 2 things that get hit by it. Phineas and Isabella get hit by it, as do Vanessa and Perry.
* The ancient marriage ceremony in ''Roleplay/LordsAmongTheAshes'' establishes a soul bond between the two recipients so long as they have both reached at least Lord level of [[WebAnimation/{{RWBY}} Aura]] mastery. [[spoiler:Jaune and Cinder]]'s soul-bond is so strong that it allows them to sense each other's emotions, bolster each other's Auras, and [[spoiler:combine their Auras to form a dual [[YinYangBomb Semblance]], [[StatusBuffDispel Ruin]]]].

* Jaguar Paw and Seven from ''Film/{{Apocalypto}}''. When Jaguar Paw has a minor HeroicBSOD, Seven (Who is trapped in a cave of sorts) physically shows the distress he is experiencing and reminds him to "come back" to her. When Blunted wishes Jaguar Paw to "journey well", Jaguar Paw responds with "I can't go now".
* ''Film/{{Avatar}}'' provides a non-psychic example: Na'vi intimacy includes the physical connection of nervous systems via the partners' queues.
* The first incident of ''dreamfasting'' between Jen and Kira in ''Film/TheDarkCrystal'' was unintentional, certainly helped along their fast friendship. Since ''The Dark Crystal'' was directed at kids, actual romance was only implied.
* A central theme in ''Film/UpstreamColor'': the two main characters become a romantic couple after being hypnotized with a substance that opens up empathic links with other people. They become so attuned to each other that [[spoiler:they start confusing each other's memories for their own. They are also linked to a mated pair of pigs, which have been implanted with the same substance used on them. The human couple occasionally get feelings they don't understand as a result of things happening to the pigs]].

* The ''[[Literature/TheWheelOfTime Wheel of Time]]'' series has the "Warder bond" between the SwordAndSorcerer Warder and Aes Sedai. Many of the bonded are not lovers, but Green Aes Sedai who only take one Warder are usually married to them. Of the major characters: Rand and his harem, Nynaeve and Lan as soon as there's a second to spare, and, as of ''The Gathering Storm'', [[spoiler:Gareth Byrne and Siuan]].''Towers Of Midnight'' adds [[spoiler: Egwene and Gawyn]]. Note that this also includes one-way compulsory magic, so the romantic aspects are often downplayed.
** Rand's harem finds out the hard way that their jury-rigged version of the bond isn't one-way, especially during moments of strong emotion; to make it worse, one of the harem has a female Warder separately, of her own, who finds out that she can feel ''much'' more than she wants to. She ends up getting severely drunk to block out the effect. (Which may also have been a measure of giving her own back, as they'd earlier learned that drunkenness can ''also'' travel up the Warder bond.)
** Married Asha'man do something quite similar to the "Warder bond" with their wives, specifically because of this trope, but completely without the compulsion. As one put it, it's just really reassuring to know that your wife is okay.
** And the Asha'man Androl ends up bonding a Red Ajah Aes Sedai who had just bonded him more or less against his will. They end up becoming rather close by more than just necessity after that.
* In Nora Roberts' Sign of Seven Trilogy, Fox and Layla are both telepathic and even have a steamy sex scene where they are psychically linked.
* In Creator/MercedesLackey's Literature/HeraldsOfValdemar universe, this is called a lifebond. [[OddlyCommonRarity Overused in her earlier books given its supposed rarity]], but less frequent later in the series, and characters in several different books discuss or illustrate the potential negative aspects of such a bond. In ''Winds of Fury,'' Stefen speculates that in many cases lifebonds occur between someone who is extraordinarily powerful but emotionally unstable and someone who is [[LivingEmotionalCrutch much more mentally grounded]]; he proves his point by being able to describe with great accuracy the lifebonded partner of [[TheEmpath Herald Talia]] without ever having met the man, purely based on his encounter with Talia's out-of-control Empathy back in ''Arrow's Flight''.
** One particularly dramatic case goes a long way towards showing that a lifebond is not necessarily all that desirable, and also supports Stefen's theory: In ''Brightly Burning'', Lavan Firestarter's lifebonded is [[spoiler: his ''Companion'']]. It's noted within the book how screwed up the relationship is and that it means that Lavan ([[YouShouldKnowThisAlready had he lived]]) would have been one giant mess of emotional issues, even for a Herald. It's only the extremely extenuating circumstances (Lavan is unable to control the full extent of his Gift, on his own, and [[spoiler:his Companion]] has to be 'bonded with him to provide the extra control) that prevent anyone from trying to undo things. When [[spoiler: his Companion dies at the end, he mentally collapses and unleashes fiery doom on the entire battle field, effectively ending the war and killing himself in the process.]] Lifebonding is far from an unambiguously good thing.
*** A less dramatic example (which also illustrates how much of an OddlyCommonRarity lifebonds are in the early books in the series), Keren in ''Arrows of the Queen'' breaks down when her lifebonded partner Ylsa is killed, and is only saved from willing herself into death by the intervention of Sherrill, who is ''also'' lifebonded to Keren and would have, other characters speculate, formed a three-way lifebond with Keren and Ylsa if the situation had been recognized prior to Ylsa's death.
** In ''The Black Gryphon'', after two people hook up quite melodramatically one of them expresses annoyance at the rumors that they turned out to be lifebonded. He remembers hearing friends who ''are'' talk about it as something extremely difficult, but rewarding if it works.
---> "Lifebonding is hardly as romantic as the ballads make it out to be. Both of you have got to be strong in order to keep one from devouring the other alive. And you'd better hope that both of you are ready for the kind of closeness that lifebonding brings, especially between two people who are [[TheEmpath Empaths]]. You can't fight or argue--you feel your partner's pain as much as your own. You become, not two people precisely, but a kind of two-headed, two-personalitied entity, Tamsin-and-Cinnabar, and you'd better hope that one of you doesn't suddenly come to like something that the other detests because you wind up sharing just about everything!"
---> "But when it finally works, it is a good thing, a partnership where the strengths are shared and the weaknesses minimized. ''I'' think that the good points all outweigh the bad, but I have reason to."
* As the quote above indicates, it happened to [[Franchise/StarWarsExpandedUniverse Luke Skywalker and Mara Jade]]--though this connection only happens when they both choose to reach out for it, which they don't until a good ten years after they meet and become friends, and they spend most of their time less thoroughly entangled. In ''[[Literature/OutboundFlight Survivor's Quest]]'' Mara explicitly points out that they can't use this connection to talk in words, but they use it in fighting to be a kind of single two-bodied entity that strikes with total precision.
** Also between a male PlayerCharacter and Bastila Shan in ''VideoGame/KnightsOfTheOldRepublic''.
** It's not the same in ''Literature/JediApprentice'', but it ''is'' noted that a good early sign that the Master-Padawan bond is working as it should is for both parties to sometimes think the same thing in unison. Notably, this doesn't mean either can read the other's mind, though they may become close enough to know what the other is thinking.
* Andy and Vicky, the parents in the Creator/StephenKing novel ''Literature/{{Firestarter}}'' survive the drug trial that kills most everyone else by forming a psychic connection.
* ''Literature/JaneEyre'' plays with this idea but doesn't quite commit to it. Not only are Jane and Mr. Rochester incredibly attuned to each other's thoughts and feelings, but it is his voice "calling" on her for help from miles away that finally persuades her to return to him at the end of the novel. Even Jane thinks it might just be a coincidence; they do spend quite a bit of time thinking about each other.
* ''Literature/HellsGate'' by Creator/DavidWeber features a world of psychics and a world of mages in a war. On the psychic side called Sharona, about 1/4 of the population has a form of psychic talent, ranging from telepathy to being able to teleport small objects. There are two types of psychic bonds shown. Married couples get a bond allowing a form of telepathy between them, even when only one is a Voice able to do true telepathy. (It's also shown to be extremely useful when one is a Voice, a telepath specializing in distance communication and perfect recall of memories, and the other has a power such as mapping where they can terrain map anything with in 5 miles.)
** The second type of bonding is a form of recognition. Much like a bond such as in ''[=ElfQuest=]'', but the bond is implied to be one and only soulmates. This is stated to be the source of most of the great romantic and tragic literature of Sharona, due to recognition ignoring if one of the soul mates is already married.
*** This type shows up prominently in the sequel, ''Hell Hath No Fury''. Characters who have never met before encounter one another and instantly begin behaving as if they've been together (happily) for years. There's little comment made about it. It's like love at first sight turned UpToEleven.
* Lisanne Norman's Literature/SholanAlliance Series has a large number of Leska pairs that fill this. It doesn't work very well for some pairs.
* Creator/RobinHobb's ''[[Literature/RealmOfTheElderlings Farseer]]'' trilogy plays with this. Kettle (Kestrel) describes having this type of bond with her lover, before discovering him to be sharing the same kind of bond with her twin sister, Gull. Similarly, the Fool seems to experience an unrequited version through his feelings for Fitz.
* Creator/GeorgeRRMartin's short story "A Song for Lya", dealt heavily with this idea. [[spoiler:It didn't end well.]]
* In ''Literature/BeyondTheGlass'' by Antonia White, the main character has this with the man she falls in love with after the failure of her first marriage. And then the intensity of their relationship is a contributing factor to her going insane...
* The Patryn can invoke this in ''Literature/TheDeathGateCycle'' as part of their marriage ritual.
* Abramm and Maddie in the series ''Legends of the Guardian-King'' have this. (That's how Maddie knows Abramm is NotQuiteDead, even though he's been missing for a year.
* Katherine Kurtz's Literature/{{Deryni}} novels use this trope in nearly every book.
* Happens to quite a few couples in the Literature/SagaOfRecluce.
* Wizards in the Literature/YoungWizards 'verse experience this if they end up romantically intimate with each other--a fact learned and demonstrated during ''A Wizard Abroad'' when Nita's crush on the Irish wizard Ronan turns into her first kiss. It's broken off when she sees more in his mind than she expected: [[spoiler:Ronan is the new host for the One's Champion]].
* The Literature/LiadenUniverse calls this "lifemating". It's stated to be extremely rare in Liaden society, yet somehow it seems to happen to [[OddlyCommonRarity just about every main character]] in the series (though some of them have to wait decades to find their lifemate); it's vaguely suggested that it has something to do with the [[WorldTree telepathic tree]] they take care of.
* ''Literature/DunctonWood'' has this occurring between Rebbecca and Bracken. Despite this they don't actually mate until very late in the book because [[CrapsackWorld something horrible keeps getting in the way.]]
* In the ''[[Literature/GriffinAndSabineAnExtraordinaryCorrespondence Griffin and Sabine]]'' trilogy, the titular characters have a version of this, seeing each other's paintings and eventually building a very long distance relationship.
* The Fey in the ''Literature/TairenSoul'' series bond this way. As the breeding of girl children depends on the mindlink and the probability of one forming between any two given individuals is low, there always is a serious skew in the sex distribution. This is "compensated" by the men killing themselves after so many centuries if they don't form a mindlink.
** It should also be noted that truemates cannot share thoughts (without using magic, anyway) until their bond is complete, which can take some time. This rule conveniently allows for romantic tension between the truemated-but-not-fully-bonded-yet protagonists.
* A young adult science fiction novel, ''A Place of Silver Silence'' by Ardath Mayhar, has this going on via technological means--arranged marriages between ten year olds based on scientific psychological testing. The main character got to enjoy her husband's death vicariously as a result. We get ''shown'', not told how he died--by having his internal organs rearranged in an artistic manner. [[GettingCrapPastTheRadar In a book listed on Amazon as 7th Grade and Up!]]
* In ''[[Literature/InheritanceCycle The Inheritance Cycle]]'', every dragon is mentally linked to their rider to the point of being able to become one consciousness in the midst of battle. Although this isn't romantic, when a rider's dragon is killed or vice versa, it is described as having half of yourself ripped away, which usually resulted in death or madness. The relationship shown between Eragon and Saphira is shown to be an extremely close one, although not romantic, as they feel as if they are one person.
* Ramses and Nefret Emerson, of the ''Literature/AmeliaPeabody'' detective series, have a one-way link, whereby Nefret knows when Ramses is in imminent danger.
* In the Literature/AnitaBlake series, this meets either LoveDodecahedron or {{Polyamory}}, but either way, it is complex. To take the relationship tree the story revolves around: Jean-Claude took Anita as his human servant and Richard as his animal to call, making a connection between all three of them. Anita, being a necromancer and animator, picked up some of the vampire power, and so now has Damian, her vampire to call, and a number of animals to call, because she keeps picking up various wereanimals that she might be able to turn into--but really doesn't want to. And until the first change, a person can ''keep'' picking up new wereanimals, so this probably isn't going to stop any time soon. And breaking the link between vampire and servant is severely damaging to both parties, but if the human dies that means the vampire is hurt and maybe goes insane, and if the vampire dies an unshielded human will die or go insane.
* The Marat in the ''Literature/CodexAlera'' form telepathic bonds with totem animals. In the first book, ''Furies of Calderon'', a Marat girl named Kitai accidentally forms such a bond with the main character, Tavi. The two become a couple as the series progresses and display some aspects of this trope, such as being able to sense one another's presence and moods. It also means that [[spoiler: when Tavi begins to develop furycrafting, Kitai develops it as well.]]
* In Gene Roddenberry's novelisation of ''Film/StarTrekTheMotionPicture'', Kirk's mind calls to Spock from light-years away--this is what causes him to fail to achieve Kolinahr. Even with Spock's fluctuating-as-the-plot-demands telepathic abilities, that is really indicative of a mind-link. Slashers forevermore have had a field day with this, since the only mention we hear of person-to-person mindlinks without physical contact is in the context of the marriage bond.
* In ''Literature/TheSharingKnife'' series, Lakewalker marriage essentially involves becoming a limited form of this--no mind reading, but they can tell if the spouse is alive, and one character can tell the general direction her husband is in.
* In ''Literature/TheRedemptionOfAlthalus'', all of the main characters eventually develop a non-romantic version of this, but the couples end up with special, private links.
%%* Maigrey Morianna and Derek Sagan from the space opera ''Literature/TheStarOfTheGuardians''
* In the Literature/FirebirdTrilogy, telepathic Pair Bonding creates a link between the couple, allowing them to always sense each others' emotions when in proximity, and leaving a feeling of emptiness when separated. When the bond is broken, the surviving spouse goes into [[HeroicBSOD bereavement shock]] and can take ''years'' to regain a semblance of normalcy.
* {{Inverted}} in ''{{Literature/Twilight}},'' as [[OurVampiresAreDifferent Edward]] can read anybody's thoughts except for [[LoveInterest Bella]].
* Alex and Jo are this way by the end of ''Literature/TheParasiteWar'' by Tim Sullivan.
* Joanne Bertin's Dragonlords have it sort of built in. A Dragonlord is a being with half a human's soul, half a dragon's; before they are born these souls are split in twain and reassigned. Dragonlords pine after their soultwins, and there's mention of the horrifically tragic case when one's soultwin turned out [[MayflyDecemberRomance to be a normal human]]. It's also said that most soultwins are just a little closer than really close human couples, but the title character of ''The Last Dragonlord'' envies those who are much closer, so close that it's physically painful for the two to be apart for more than a few hours. It seems there are also some who can't stand each other--not because of differences in personality or interest, which is unheard of, but because they are individuals who hate themselves.
* ''Literature/TrappedOnDraconica'': "We're twins; united in body and soul." [[spoiler: Presumably Erowin being Ben's twin serves as an 'anchor' which allows her to stick around and help after Mordak kills her.]]
* In Creator/AndreNorton's ''Literature/OrdealInOtherwhere'', Charis and Shann develop a PsychicLink, though they have to take care to keep it from overwhelming them. That it led to marriage becomes clear in ''Literature/ForerunnerForay'', when their son recounts how the Wyverns trained him because of it.
* Treecat mates, in the ''Literature/HonorHarrington'' series, since the species as a whole is telempathic.
** Later in the books, it's revealed that [[spoiler:Honor herself]] has one of these with [[spoiler:Hamish Alexander]], whom [[spoiler:she later marries]], though the link is empathic in nature, not telepathic. She comes by it honestly: [[spoiler:her mother Allison and father Alfred also have an empathic bond]].
* Rye and Sonia develop one of these fairly early on in the [[Literature/DeltoraQuest Three Doors]] trilogy. Late in the second book, they [[spoiler:are able to reach out to Rye's brother Sholto using this method when they cannot risk calling to him]].
* ''Literature/JourneyToChaos'': Eric and Kasile's minds are linked together by [[spoiler: Tasio]] which enables them to communicate telepathically. This leads to them becoming LikeBrotherAndSister with Eric's crush on her transforming into BigBrotherInstinct.
* ''Literature/ZeroSight'': Mages can become a weft pair, which means they understand each other's emotions and thoughts, know where their partner is and transfer mana from one to another. The main couple of the series becomes one by accident. In-Universe the most famous pairs even have cards dedicated to them.
* ''Literature/TalesOfTheBountyHunters'': Dengar has aspects of this in his relationship with Manaroo, as her people use a device which lets them share emotions. It's standard among her people, and helps to recover some of his lost emotions from sharing hers.
* In ''LightNovel/TheIrregularAtMagicHighSchool'', Tatsuya and Miyuki have a low-level example because part of her magic is devoted to suppressing his. When Miyuki dies, [[spoiler:as in the Reminscence arc,]] Tatsuya knows she's gone because the suppression is.
* Ingrey and Ijada in ''[[Literature/{{Chalion}} The Hallowed Hunt]]'' share an empathic-level bond [[spoiler: created by Horseriver to keep control of Ingrey as part of his plan. His breaking it when he starts the final step of the plan sends Ijada and four companions chasing after them.]]

[[folder:Live Action TV]]
* In an early episode of ''Series/BabylonFive'', a telepath says that having sex with another telepath invokes this trope, comparing it to mirrors endlessly reflecting one another.
* In ''Series/{{Beauty and the Beast|1987}}'', Vincent and Catherine could usually tell when the other was in trouble. When the mind-link broke, it almost drove Vincent crazy.
* In ''Series/DoctorWho'', for a long time it has been hinted that the Doctor and TARDIS were mentally linked, to the extent that the TARDIS's translation circuits depend on the Doctor's health. Similarly, there was a RunningGag that there seemed to be some kind of CargoShip going on; the Doctor would call his time machine "dear" and "sexy", and even companions would joke about how he would stroke her console. It was all but confirmed in a Season 6 episode where [[spoiler: the TARDIS was forced into a human body, and the two characters spend nearly the entire episode flirting, having sexual tension, or tearful SugarWiki/HeartwarmingMoments.]] The name of the episode? "The Doctor's Wife".
* On ''Series/{{Farscape}}'', Zhaan's species can do this with each other as part of their spiritual/psychic bag of tricks. Its eventually revealed that the crime which got Zhaan imprisoned by the Peacekeepers was [[spoiler: using this link to kill her lover, an important political leader who was going to start a bloody coup d'etat (by hiring the Peacekeepers to take over their planet).]] The psychic backlash from this basically [[AxCrazy drove her insane]], but she used her years in solitary confinement to achieve a measure of inner peace through meditation. When she's forced to do this ''again'', the level-headed pacifist undergoes an abrupt personality shift for several episodes, becoming violent and short-tempered until she can find a way to recenter herself.
* On ''Series/{{Fringe}}'', Oliva and John Scott have this [[spoiler:even after he's dead]] via the sensory deprivation tank.
** Later in the series, Peter and [[spoiler: Olivia]] develop an odd (and especially impressive) variation of this which, par for course with the series, defies the very laws of time and space with unclear moral consequences: [[spoiler: After he writes himself out of the time-line and then reappears in the present, his presence and her unique abilities and brain chemistry bring forth her memories from the original time-line (including them falling in love). Unfortunately, this eventually completely replaces her memories of the new time-line, effectively killing that version of Olivia in favor of the OneTruePairing favored/required by TheMultiverse]].
* In ''Series/HowIMetYourMother'', Marshall and Lily have been shown to have done this on occasion.
** As HeterosexualLifePartners, Ted and Marshall (and Barney) do this on occasion as well. Robin and Lily aren't as good at it, at least not in early seasons.
** One notable instance included the entire group at the table in silent discussion about how to get Ted to bleach his hair blond and how hilarious it will look. Ted was also present and involved in the link, [[ComicallyMissingThePoint but thought they were all discussing whether to order nachos]].
* In ''Series/PrettyLittleLiars'', Paige and Emily have stated on separate occasions that they 'have a connection', have several parallels in their stories, especially their coming out ones are both very similar, when Emily cheated on Paige, it was Paige who rationalized and figured out what happened and why before Emily herself even did and Emily seemed to agree, they both knew and understood each other when nobody else did, and gave each other the benefit of the doubt when needed and both complement each other perfectly. In season five Paige was so in tune with Emily that she was able to discern when she wanted her back and made the first move and kissed Emily and beat her to the punch so she wouldn't have to apologize and beg her to return, and even though they break up before the series ends, their breakup continues to illustrate that they have a complete understanding of one another, and ultimately breaking up is their final ActOfTrueLove:
-->'''Emily:''' I HAVE to do this.\\
'''Paige:'''I know. That's what makes you Emily.
* Starting in season 2 of ''Series/Sense8'', Will and Riley engage in a sexual relationship with each other. Naturally, their psychic connection makes them this. At one point Will has to take blocker pills to prevent Whispers from being able to visit him, and they [[LampshadeHanging acknowledge that kissing isn't as intense without their psychic connection]].
** Kala and Wolfgang also fit this trope, although as of season 2 they haven't yet met in person.
* Trip Tucker and T'Pol on ''Series/StarTrekEnterprise'' had a psychic bond and were in love (largely due to T'Pol's damaged emotional control from drug abuse). Their first hint is when they find themselves sharing the same daydream, despite being on different starships.
* Troi and Riker from ''Series/StarTrekTheNextGeneration'' were like this early on, talking to each other telepathically a lot. This was dropped or forgotten, later, though it was picked up again in the novels, especially Creator/PeterDavid's ''Imzadi''.
** Much later, in the seventh season episode "Attached", Captain Picard and Doctor Crusher are mind-linked for an episode due to neural implants. During this time, they come to terms with their feelings for each other and decide to keep things professional (because of personal history and because StatusQuoIsGod).[[note]]"Decide to keep things professional" is a euphemistic way of putting it. Picard seems all set to [[UnresolvedSexualTension resolve some things]], but his hopes get [[{{Pun}} Doctor Crushed.]] They get over themselves in the novels.[[/note]] The SeriesFinale does show that they did [[HookedUpAfterwards get together in the future]], but later divorced.
* ''Series/StarTrekTheOriginalSeries'' "Amok Time". Spock had a mindlink placed in him as part of an ArrangedMarriage when he was a child. This mindlink was suspiciously easily overcome.
** The Vulcan Pon farr is expanded quite a bit in the Franchise/StarTrekNovelVerse, including one book wherein one of the mates ''[[OutWithABang dies of a heart attack]]'' during its consummation.
* Played with on ''Series/TheXFiles'' between Mulder and Scully, though oddly (given the paranormal premise of the show) never truly explored. The most overt of this implied "link" is the fact that they dream of each other while the other is abducted; Mulder dreams of Scully being tortured in season two, while Scully does the same in season 8. In fact, this becomes so regular that Scully panics when she stops having the dreams, for fear that Mulder's death might be the reason.

* Believe it or not, this is what the Music/GoldenEarring song "Radar Love" is about. But it doesn't change that it's an awesome driving song.

[[folder:Video Games]]
* The epilogue text in ''VideoGame/DragonAgeOrigins'' suggests that the male Warden and Morrigan may be able to sense each others' emotions/thoughts to some limited degree, due the pair of enchanted rings that they both wear.
* If you pursue [[DatingSim Mint's route]] in ''VideoGame/GalaxyAngel'', something like this happens. Mint is the only natural-born telepath in the Angel-tai, but as she falls for Tact, she feels like he can read her thoughts as well as she can read his. [[RuleOfRomantic There is no explanation for this.]]
* ''VideoGame/{{Galerians}}'' has elements of this for Rion and Lilia, due to each one having one half of the virus program in their heads. Rion and Lilia can telepathically communicate, and Lilia feels pain when Rion is hurt. Whether or not it's romantic is somewhat debatable, but they are, at the least, very close best friends.
* A variation on this is created between Gordon Freeman and Alyx Vance in ''VideoGame/HalfLife2: Episode Two''. [[spoiler:In the process of healing Alyx from a mortal wound, the vortigaunts weave Gordon's "life essence" with Alyx's. This is similar to the "preservation of sanity" variant--here, it is implied that the link is critical to reviving Alyx ''physically''. And nothing suggests that the link couldn't work in reverse.]]
* The male protagonist of ''VideoGame/KnightsOfTheOldRepublic'' has this with Bastila, if you decide to pursue the romance. The PC in the second has a non-romantic version with Kreia, and a straight example with Visas.
* For the Asari in ''Franchise/MassEffect'', the only way for them to mate and reproduce is to link their neural network with another creature's. This has the added benefit of enabling them to mate with any species, regardless of gender.
** The High EMS Destroy Ending in ''VideoGame/MassEffect3'''s [[AuthorsSavingThrow Extended Cut]] implies a stronger version of the mind link between the asari Liara and PlayerCharacter Shepard, as Liara is shown [[spoiler: with a small hopeful smile at the memorial wall instead of a mournful look, when Shepard survives the Crucible activation and takes a breath. That said, every love interest does so in that ending, so this likely has nothing to do with the mind meld.]]
* Meryl and [[spoiler:Johnny]] show signs of this near the end of ''VideoGame/MetalGearSolid4GunsOfThePatriots'', as they shot enemies only the other one could have seen and shove new magazines into guns held in their direction without looking at it. [[spoiler:Which is even more interesting as the SOP-system was supposed to do exactly that, but Johnny never managed to work with the rest of the team, as he lacked SOP. Once the system is shut down and Meryl has to act on her "real" instincts, they work together amazingly.]]
* Sion and Riesbyfe have this in Sion's good ending in ''{{Videogame/Melty Blood}}: Actress Again''. Explained in that Riesbyfe's entire existence is now a physical projection from the data inside Sion's head.
* Exploited in combination with LoveTranscendsSpacetime in ''VisualNovel/NineHoursNinePersonsNineDoors''. [[spoiler: Zero's primary goal is to use mindlink between Junpei and Akane and give her information she needed to survive 9 years prior to when game takes place. The fact that they're in love results in particulary strong connection, which is why he was kidnapped.]]

[[folder:Web Comic]]
* Kevyn in ''Webcomic/SchlockMercenary'' while bantering with his sister made [[http://www.schlockmercenary.com/2005-05-07 a dirty joke about her cyborg husband and a ship's AI]].
* According to Kin in ''Webcomic/{{Goblins}}'', the closest [[SnakePeople Yuan-Ti]] come to what humans would call "Love" is "True-Seeing": when two Yuan-ti grow especially close, they can sense one another's feelings and pain as though they were their own. Minmax starts to think that he and Kin might be True-seeing one another, but she doesn't believe him... until she sees his hand is bleeding and remembers experiencing an unexplained jolt of pain in her own hand.

[[folder:Web Original]]
* Iriana and Mille have this in ''Literature/IlivaisX''. [[spoiler: It's due to both of them having similar Drive Cores, which contain an empathic maintenance and observation function, but in their case it's ''very'' strong.]] However, it only works in full when either one is in the Ilivais or they're both in close proximity, though it is shown they can detect a general emotional state from afar. They also have an internal compass that lets them find one another, though that's from a makeshift blood transfusion that uses [[spoiler: both Mille and]] Iriana's regenerative abilities to have those blood cells be drawn to the other.
* ''Blog/{{Limyaael|sFantasyRants}}'' has [[http://limyaael.livejournal.com/180565.html a few suggestions...]]
* In ''Podcast/MetamorCity'' telepaths temporarily fuse consciousnesses when they have sex, then afterwards they try to sort out whose memories are whose and piece themselves together. People without telepathy can't do the last part so all but the weakest teeps are rather limited in their choice of partners.

[[folder:Western Animation]]
* Early promotional material for ''WesternAnimation/DannyPhantom'' hinted at a "psychic connection" that Danny was supposed to share with Sam "SheIsNotMyGirlfriend" Manson. This was dropped in the series proper.
* Aelita and Jérémie from ''WesternAnimation/CodeLyoko'' shared a mind link in the episode "Frontier".
* ''WesternAnimation/{{Gargoyles}}'' had an unusual case, with three souls inhabiting one body (Coldstone), two of which were in love. They lamented being unable to feel physical things, but one can only imagine what it's like to not just be in each other's minds but ''be'' each other's minds... together.
** Not only that but think about being the third guy. Who has to share a body with the SickeninglySweethearts.
** Made worse by the fact [[LoveTriangle the third guy also loves the girl]], [[TheRival hates the other guy]], '''and everyone involved knows it'''.
*** Including Demona, who originally summoned the ghosts that make up Coldstone's consciousness. She really is a jerk, isn't she?
*** Oh, and he's a psychopath. [[AllThereInTheManual Scripts]] and {{fan|Nickname}}s usually refer to these three as [[Theatre/{{Othello}} "Othello, Desdemona and Iago"]] to highlight the situation.
* Source of a major ShipTease in ''WesternAnimation/TheAdventuresOfJimmyNeutron'', when [[BelligerentSexualTension Jimmy and Cindy's]] brains are mixed together for a short time
--> '''Cindy:''' Did you um, notice, when our brains were floating inside that thing together, [[SheIsNotMyGirlfriend which was disgusting, by the way!]] One of us was imagining us walking down a country lane, holding hands, and um, kissing?
* ''WesternAnimation/AdventuresOfTheGalaxyRangers'' had a hint of this between Shane and Niko. Niko was already a Psychic ActionGirl, and could usually read the gents with ease. However, in the episode "Changeling," Shane was gravely wounded and had no way to communicate a "do not shoot" order to his team. In desperation, he used his implant and sent a telepathic message to her. The fact he was able to ''actively use'' telepathy during that one instance has led to a great deal of speculation on the part of fan writers.
* Spoofed in the rather infamous ''WesternAnimation/AquaTeenHungerForce'' episode "Handbanana". Handbanana mindlinks with Carl and immediately makes creepy threats about coming for him in the night. Then [[BlackComedyRape he rapes him. Repeatedly]].
* ''WesternAnimation/AmericanDragonJakeLong'': Jake and Rose were dating in magic dreams for a time.
* In ''WesternAnimation/StevenUniverse'', Ruby and Sapphire are very close, and spend most of their time fused, which they even refer to as a "relationship". [[spoiler: The fusion is Garnet.]]

[[folder:Real Life]]
* Creator/CSLewis in ''A Grief Observed'' said that once or twice during his bereavement he felt as if Joy was trying to comfort him from beyond the grave.
* Cybernetics researcher Kevin Warwick (of putting a chip into his arm that ''[[{{Technopath}} remote-controls electric circuits]]'' fame) [[http://diyhpl.us/~bryan/papers2/neuro/implants/Neural%20implants%20with%20internet%20connectivity%20between%20two%20humans%20-%20Thought%20communication%20and%20control%20-%20a%20first%20step%20using%20radiotelegraphy%20-%202004%20-%20awesome.pdf conducted an experiment]] in which he and his wife got wireless transceivers patched into the nerves of their arms. It's not clear how much they were able to communicate with each other, and it may have been [[TheEmpath empathic]] at best. Pretty good going for real life.
* There is a practice made popular on some corners of the Internet that involves literally creating a second conscious personality in one's mind, known as a [[{{Tulpa}} Tulpa]]. This second personality can basically become an entirely new person, and one with whom the practitioner (known as the "host") can share an incredibly close bond that's basically this trope exactly, a closeness most people will never experience.