History Main / CantLiveWithoutYou

* Arthur and Shalott in ''AirGear''; Shalott was almost killed when another character kicked through his chest, [[YouFailBiologyForever damaging all his vital organs]], so Arthur's organs were transplanted into Shalott. Now Arthur has no organs, so he's dependent on a literal blood connection between him and Shalott for feeding and waste elimination, and will die in a couple hours if the connection is interrupted.

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* ''CodeLyoko'': Although Aelita is materialized in the second season, XANA ensured the kids couldn't CutTheJuice on him by linking Aelita to the Supercomputer. She would lapse into unconsciousness whenever the machine is turned off -- and a too long interruption would make her heart stop.
* After Fry is critically injured in a car crash in ''{{Futurama}}'', [[YouFailBiologyForever his head is attached to Amy's body to make sure he survives until his body is healed.]]

* ''AhMyGoddess'' has the doublet system, in which random pairs from heaven and hell are linked. If one dies, the other dies. After they are linked, their memories are erased -- the purpose being so if you kill someone on the other side, you don't know which of your allies would die (it could be you, natch).

* In ''{{Tangled}}'', Gothel is dependent on Rapunzel's magical hair to keep her perpetually young; without it, she will rapidly age until death.

* In ''FinalFantasyIV'', the death of a summoned monster results in the death of the Summoner. This is how [[spoiler:Rydia's mother]] dies early in the game. Once it returns to the realm of summoned monsters, the Summoner can no longer be harmed by its death. Which is likely why Rydia always has her monsters show up for a single attack and then teleport away.
* In the ending for ''TalesOfDestiny 2'', [[spoiler:Reala]] dies along with the final boss Elraine when Kyle destroys the huge lens, as it is the only way to ensure the demise of Elraine, much to the dismay of Kyle. Although in the restarted timeline, [[spoiler:thanks to the {{power of love}}, Reala is miraculously reborn and reunited with Kyle at the place where they met for the first time.]]

** The Jaffa race in the ''{{Stargate}}'' Verse can't live for long without having a Goa'uld larva inside their pouch, until a medicine that has the same effect is discovered in one of the later seasons.

* Prominent in the Nasuverse. In the ''Tsukihime'' sequel ''KagetsuTohya'', it's revealed that when the magus who created a familiar dies, the familiar will also die. The only exceptions are when it is a very advanced creation [[spoiler:such as Len, who is ''still'' dying because of it]]. For the same reason (mana sustaining their life) Servants in ''FateStayNight'' will quickly die without a Master. However, this isn't an entirely straight example as the person in question can be ''replaced...'' but it is still a replacement in a dependency situation.

* ''{{Wakfu}}'': The whole Sadida people is linked with the Tree of Life, a huge sentient tree at the heart of their kingdom. This prove a lethal weakness when [[BigBad Nox]] decides to drain the [[LifeEnergy wakfu]] of the Tree of life, and thus of every Sadida alive.

* [[Truth in Television]] for some cultures - Yanomamo rainforest Indians believe that everybody has a kind of animal doppelgänger called a noreshi, which takes the form of aerial or arboreal animals for men or ground-dwelling animals for women. They say that to kill one's noreshi would cause the person drop dead and vice versa. Many intentionally try to find their rivals' noreshi for this reason, as outright murder is a pretty damn stupid idea in a culture where inter-village alliances are about as sturdy as damp tissue.

* In one chapter of ''BlackJack'', the title doctor surgically attaches a young boy with lungs weakened by heart disease to his mother until he can get an organ donor.

* In ''DragonBall'', if Piccolo were to die, then Kami would as well and vice-versa.

* ''CodeLyoko'': Although Aelita is materialized in the second season, XANA insured the kids couldn't CutTheJuice on him by linking Aelita to the Supercomputer. She would lapse into unconsciousness whenever the machine is turned off -- and a too long interruption would make her heart stop.

* In one episode of ''{{Ben 10}}'', Ben and Kevin are captured and forced into GladiatorGames. They are shackled together by an energy shackle so that if one dies, the other does too.

* This, along with traits of {{Synchronization}}, is the case between Demona and Macbeth in ''{{Gargoyles}}''.

** Aes Sedai and their Warders have this type of bond. If a Warder kicks it, the Aes Sedai will be hit with pretty fierce depression, occasionally bordering on suicidal. Warders who lose their Aes Sedai generally go whole hog, becoming [[DeathSeeker Death Seekers]] against either the person who killed their partner or just whatever's at hand. It's very, very difficult to keep a surviving Warder alive, and it almost always requires [[IfYouKnowWhatIMean extreme measures]].\\\

* ''{{Farscape}}'' used synchronizing bracelets for a few episodes involving negotiations.

* In PrincessResurrection, protagonist Hiro needs infusions of chi/blood from Hime (depending on anime or manga) to continue his existence or he dies within days. Okay, he's ''technically'' already dead, but it still works in context.

* Comicbook/CloakAndDagger of the same universe depended on each other a little less dramatically -- without the countervailing influence of the other's powers, each would go (respectively) terminally depressive or destructively manic from the effect of their own.

* In ''TalesOfDestiny2'' ending, [[spoiler:Reala]] died along with the final boss Elraine when Kyle destroyed the huge lens as it is the only way to ensure the demise of Elraine, much to the dismay of Kyle. Although in the restarted timeline, [[spoiler:thanks to the {{power of love}}, Reala was miraculously reborn and reunited with Kyle at the place where they met for the first time.]]

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* Not quite "live", but Belkar of ''TheOrderOfTheStick'', will have the "Mark of Justice" activate if he's ever a certain distance from Roy. In an attempt to play this up, he's forced to accompany Haley (and thus stay [[spoiler:in proximity to Roy's corpse]]) in case [[spoiler:Roy's death]] didn't undo the Mark's power. This lasted until [[spoiler:Belkar set off the Mark via one of its two other activation conditions]].
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* After Fry was critically injured in a car crash in ''{{Futurama}}'', [[YouFailBiologyForever his head was attached to Amy's body to make sure he survived until his body was healed.]]

* This trope was intentionally invoked in the now-rare Hindu practice of ''sati'' -- when a man died, his wife burned herself to death on his funeral pyre.

[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/there-goes-earth_4820.jpg]]
[[caption-width-right:300:[[FistOfTheNorthStar You're already dead.]]]]

* Elraine and Kiri of ''DoubleArts'', pictured above, must always be physically touching (normally holding hands) or Elraine will die of the disease she's infected with but he's immune to and staves off.

* In ''Literature/HowlsMovingCastle'' by DianaWynneJones (and [[Film/HowlsMovingCastle the film of the book]] by HayaoMiyazaki), Calcifer has Howl's heart because Howl ate Calcifer (who is a shooting star) as a child. So, as is often referenced when Calcifer talks to Sophie, "If I die, Howl dies too."

* In ''HowlsMovingCastle'' by Diana Wynne Jones (and TheFilmOfTheBook by HayaoMiyazaki), Calcifer has Howl's heart because Howl ate Calcifer (who is a shooting star) as a child. So, as is often referenced when Calcifer talks to Sophie, "If I die, Howl dies too."

[[quoteright:227:[[DoubleArts http://static.tvtropes.org/pmwiki/pub/images/kiri_and_elraine_8108.jpg]]]]
[[caption-width-right:227:[-If they stop holding hands, she dies. Literally.-] ]]

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