A character that exists in the real world because someone dreamt them to be. The relationship between the dreamer and the LivingDream can work in at least three different ways, with quite a bit of a sliding scale between them.

# They are the same person, with the LivingDream being a kind of AlternateSelf. The dreamer may be fully aware of this, believe it to be AllJustADream, or be totally unaware that she has this other identity running around in the real world.
# They are not the same person, but the LivingDream is acting under the dreamer's orders or in the dreamer's best interests.
# The LivingDream is out of control in a destructive way. This Administrivia/InternalSubtrope of this trope is also a subtrope of RealityWarpingIsNotAToy.

In all these variants, she may very well be [[SchrodingersButterfly unaware of the fact that she is someone else's dream, alternatively be unsure which version of her is the waking one]].

Compare LivingMemory, where the "person" once actually existed. See also SpontaneousGeneration, PuffOfLogic and ImNotAfraidOfYou.

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!!Examples
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[[folder: Anime And Manga ]]

* Entei in ''Anime/{{Pokemon 3}}'', by way of the Unowns' ability to [[RealityWarper warp reality]]. For that matter the entire plot of the movie is a result of this trope.
* Paprika in "Anime/{{Paprika}}" is the alternate self of the main character, who only exists when the main character enters other people's dreams.
* In "Anime/{{Paranoia Agent}}" both [[spoiler: Shonen Bat and Maromi]] are LivingDream s of the main character.

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[[folder: Comic Books ]]

* ''MarvelUniverse'' has a superhero known as {{Sleepwalker}}. When bad things are happening, this hero's mundane alter ego doesn't run into a phone booth to change clothes. Instead, he simply takes a nap, freeing his mind to manifest his superhero self.
** Sleepwalker and his "alter ego" are not the same being nor was he created by him. Sleepwalker is a alien from a different dimension that is trapped in the human host's mind. He is able to exit the mind into Earth's reality when the human is asleep or unconscious but gets instantly pulled back against his will when the host wakes up.
* In one ''JudgeDredd'' album, the villain seemed to be [[spoiler:Judge Death]], but at the end turned out to not be him after all: "He" was actually the living dream of a female psionic who (probably subconsciously) used him as an assassin to get rid of her enemies.
* In ''CityOfDreams'', not only can humans enter the dreamworld physically as well as in their dreams - but this works both ways. People they created in their sleep have a life of their own and may walk through the portal into the waking world.
* Two examples from (PreCrisis) {{Superman}} comics:
** In one, a group of aliens, stranded on Earth, and convinced they will never be able to leave, transform into normal humans complete with no memories of being aliens. But their subconscious denial is so strong, it causes them to a) refuse to believe aliens are real, not even Superman and b) to subconsciously create a creature with their mental powers to destroy anything that might contradict this belief (eg. spaceships or Superman.) They eventually learn the truth and Superman helps then return home.
** In a similar but more tragic story, an alien courier bearing an important message to prevent a space war crash-lands on Earth and is buried underground; it manifests a "ghost self" that tries to steal what it needs to fix the ship, which of course draws Superman's attention. He frees the alien from underground but [[spoiler: it's too late; turns out the alien had only just woke up from a sleep that lasted centuries, and the war had already happened]].

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[[folder: Literature ]]

* In the fifth book of {{Narnia}}, there's an island where dreams come to life. [[spoiler:This is not a good thing, because all people sometimes have nightmares.]]
* ''Discworld/{{Hogfather}}'' is all about weird examples of those suddenly appearing.
* UrsulaKLeGuin's ''{{The Lathe of Heaven}}''. George Orr has effective dreams that can change reality.
** Type 3. When asked to dream of world peace, he dreams up space aliens who invade the Moon and later attack the Earth.
** Type 2. George later dreams that the aliens become peaceful. After they do so he has a conversation with an alien that ends up helping him.
* Creator/JorgeLuisBorges's short story "The Circular Ruins" is all about this, and one of his best. Read it [[http://www.turksheadreview.com/library/texts/borges-circularruins.html here]].
* It's implied by HPLovecraft ''all of reality'' is nothing but the Daemon Sultan Azathoth's dream.
* AndreNorton did a bunch of books about dreams-within-dreams that had an effect on the higher reality.

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[[folder: Live Action TV ]]

* ''Series/StarTrekDeepSpaceNine'' has an episode where Sisko falls in love with a mysterious woman who just keep disappearing. Turns out she's a energy lifeform without a mind of her own: She's a telepath's mental projection, existing only as a living dream while the real woman is in a kind of coma-like dream.
* There were a couple of episodes with similar plots on ''Series/BuffyTheVampireSlayer''. In one the monster was a child's nightmare version of his Little League baseball coach.
* And yet another episode with a similar plot on ''Series/StargateAtlantis''. In this case the woman was [[spoiler:a telepathic projection by an alien time capsule recovered from the ocean floor]].

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[[folder: Video Games ]]

* [[spoiler:Everyone from Zanarkand including Tidus]] from ''VideoGame/FinalFantasyX''.
* In ''VideoGame/DreamfallTheLongestJourney'', Type 1 is used for interdimensional travel. This is the power of Dreamers (of whom Zoe is the only one known so far): if they sleep particularly soundly, they can not only dream of the ParallelUniverse of {{Arcadia}} (which all humans can) but also manifest a physical presence there that can interact with objects and people while the Dreamer's actual body sleeps in our world.
* In ''VideoGame/LeagueOfLegends'', the playable character Nocturne is a nightmare taken physical form. An [[OmnicidalManiac omnicidal]] nightmare at that. They keep him imprisoned in a nexus shard when not fighting on the rift.

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[[folder: Web Comics ]]

* In ''{{Goblins}}'', this is the explanation for the Lesser Finger Horror: a demon kept a promise to cure a little boy's recurring nightmares, but did so by bringing them into the physical world.
* ''{{Homestuck}}'': The dream selves of Sburb players are a type 1. They exist as physical entities which actually coexist alongside the players in the Incipisphere (though owing to the scale of the game they're generally restricted to operating on [[DreamLand Prospit and Derse]]), can serve as an "extra life" should the player's real self be killed, and become the player's real self in the process of [[CameBackStrong God Tier ascension]]. To "awaken" one's dream self and thus be able to be it in one's sleep isn't particularly easy and usually involves some sort of trauma. By default they're the same person as their real self, sharing a mind and consciousness, but rare circumstances can cause a dream self to become a autonomous entity, as [[SpiritAdvisor Jadesprite]] did.
* 18th-century Beatrice in ''TheDreamer'' (or is she?).
* Almost the entire cast of ''Webcomic/{{Roommates}}'' is this. To describe: they are self-aware fictional characters in a world where their original stories exist as fiction (they also know that they are [[MediumAwareness still in a story]]). So yes. They were literally created by author creativity, are kept alive by the [[ClapYourHandsIfYouBelieve hand clapping]] of fandom and know this. This comes with some interesting side-effects like TheNthDoctor... which can also be invoked for a limited VoluntaryShapeshifting.

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[[folder: Web Original ]]

* From the Wiki/SCPFoundation: [[http://scp-wiki.wikidot.com/scp-781 SCP-781]], "Unwitting Dreamshaper", creates short-lived instances of these in his sleep. Which usually cause him a painful death.

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[[folder: Western Animation ]]

* ''FostersHomeForImaginaryFriends'' revolved around this. The imaginary friends are brought to life when someone dreams them up but they never cease to exist thus the foster home set up for them.
* The Crackler, a {{Kaiju}} from ''GodzillaTheSeries''.
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