A spell or other mysterious effect is placed on a character to make them look and sound like a completely different person, to select people. The user is usually unaffected, meaning that the character hears and sees his or her true form at the same time as he or she is deceiving others.

A type of {{Glamour}} and related to WeirdnessCensor. AFormYouAreComfortableWith and YouCannotGraspTheTrueForm are often forms of this. The MasterOfIllusion is likely to perform this.

See also AppearanceIsInTheEyeOfTheBeholder

[[folder:{{Anime}} and {{Manga}}]]
* In ''WolfsRain'' the wolves can appear human, but they often appear human ''to each other'' even when there are no humans around.
* This is played with in ''LightNovel/ACertainMagicalIndex'' where a spell is cast worldwide that makes everyone look and sound different, but only four people are immune (and notice the difference)[[spoiler:This turns out to only be 3, as the "Russian Mage" turns out to be an angel who caused the whole thing to happen when she descended, body swapping in the process.]] This is really confusing for the audience, as [[spoiler: Touma has lost his memories,]] and this is also the first time we meet his parents, leaving us to be unsure whether it's a dream sequence or a massive hoax played on Touma by the rest of the characters.
* In ''Anime/CodeGeass'', where Lelouch geasses [[spoiler: Guilford]] into seeing and hearing Lelouch as [[spoiler: Cornelia.]]
* ''LightNovel/ShakuganNoShana'':
** When Yukari Hirai suffers a RetGone, Shana steals her identity. Everybody except for those in on TheMasquerade perceive Shana as Yukari Hirai, though they get confused because Yukari was a ShrinkingViolet, while Shana is a {{Tsundere}}.
** An OVA revealed that earlier in her career, Shana stole the identity of Junko Ogami when she suffered a RetGone, with similar results.
* King Arthur of ''Anime/NobunagaTheFool'' appears in different forms to best brainwash whoever sees his "true" face: a mighty conqueror to Alexander, a beautiful woman to Caesar, and so on. Nobunaga and da Vinci are stated to be the only people to perceive his true form, [[spoiler: a decrepit old man]].
* ''Franchise/KagerouProject'': This is Kano's ability in a nutshell, as he can make others see him however he wants, explaining how he manages to pull off stunts like taking selfies during a terrorist hostage situation, or how he [[spoiler:is able to MindRape Shintaro and Ene by appearing as Ayano and Haruka, respectively, [[TheResenter when he wants to make them suffer]]]].

* In the MarvelUniverse, the PlanetEater {{Galactus}} appears to any observer to be gigantic member of the observer's own race. What his true appearance is like is unknown.
* In the canon ''Series/BuffyTheVampireSlayer'' comics, it is revealed Dracula uses his hypnotic abilities to make people see him as his younger self, rather than his true form, which is that of a very old man.
* The apparently shapeshifting Geltmenschen in ''ComicBook/{{Uber}}'' actually create illusions in their observers' minds that cause them to be seen as a different person - they can be detected by photography, which can't be fooled.

[[folder:Fan Fiction]]
* An aspect of the Swap in FanFic/DividedRainbow.

* The film ''Here Comes Mister Jordan'' (and its remake ''Heaven Can Wait'' and the 2001 remake of the remake ''Down to Earth'') is about a man who dies before his time and is sent back down to earth in the body of a recently deceased millionaire. To the audience he looks like himself, but to the characters he looks like the aforementioned millionaire.

* Done in ''Literature/TheDresdenFiles'' by Thomas to allow Harry to avoid TheFairFolk for awhile.
** In the ''[[ADayInTheLimelight Backup]]'' novella, the villain hits Thomas with one of these, changing his appearance to match that of the man she'd told Harry had kidnapped her child.
* In ''The Black Unicorn'', the second book in the ''{{Magic Kingdom of Landover}}'' series by TerryBrooks, the hero, Ben, has a spell cast on him by an evil wizard that causes him to look and sound different to everyone except his enemies.
* In ''Literature/RogueSorcerer'', Ankoku is constantly masking her appearance, to the point where we are told that nobody knows her true form.
* In ''[[SwordOfTruth Wizard's First Rule]]'', Richard is at one point subject to a spell that makes everyone see him as an enemy. To his enemies and himself, he looks and sounds normal, but to his friends, he appears as someone they hate.
* The disguise spells in the ''{{Myth Adventures}}'' series appear to everyone but the caster.
** Which can be inconvenient: you don't know whether you're not seeing the disguise because you cast it, or because it failed. So far, I don't think it's become a major plot point, but it did happen at least once.
*** It did become a major plot point in one novel but was kinda overshadowed by the fact that the main character was insanely low on magical power.
*** And don't forget that at one point, Skeeve completely forgot that he was still disguised as a Pervect when he started to talk about who he was...
* In ''Literature/BrokenSky'', Gerdi's spirit stones allow him to disguise himself as anyone, but can only work on so many people at once. Thus, he'll often be walking around looking to the townsfolks one way, while still looking like his true appearance to those who know him.
* ''The Talismans of Literature/{{Shannara}}'' features the Mirrorshroud, a cloak which makes the wearer appear to be someone the beholder trusts when worn
* In Fred Saberhagen's BooksOfSwords, this is the main power of the sword Sightblinder. Its wielder appears as someone the viewer either loves or fears. The downside is that this makes it very hard for the wielder to be inconspicuous.
* In at least two instances in the StarWarsExpandedUniverse (in ''[[XWingSeries Solo Command]]'' and ''[[TheThrawnTrilogy Heir to the Empire]]'') protocol droids are modified to sound like other people, either to distract the enemy with a decoy or cover the escape of the real person (or both). Obviously they still ''look'' like droids, although Squeaky in ''Solo Command'' is outfitted with a mask and uniform to fool casual observers.
* In the ''YoungWizards'' series, when Dairine is taking a trio of extraterrestrial exchange students on a tour of the local mall, the [[PlantAliens walking Christmas tree]] and the [[InsectoidAliens giant centipede]] have to use a disguise spell (the third alien, a HumanAlien, needs no disguise). The tree's disguise spell temporarily fails when he's trying out a baseball cap in a changing room, leading to a very startled store clerk.
* Mentioned in ''Literature/TheLordOfTheRings''. Gimli muses that he wishes to see if Saruman resembles Gandalf, as has been said. Gandalf responds that Saruman might look like him to Gimli, if it suited his purposes.
* In ''Literature/TheWheelOfTime'', this ability is known as the Mirror of Mists. It can also be modified for {{invisibility}}.

[[folder:Live-Action TV]]
* In ''Series/QuantumLeap'', Sam Beckett takes on the "Aura" of the person he has leaped into. Several episodes, such as the one where Sam [[EverythingsBetterWithMonkeys leaped into a monkey]], confirmed Sam is actually leaping with his own body, and merely appearing as the host to those around him. Of course, just as many episodes demonstrate the opposite to be true.
** In one episode, Sam leaps into the body of a war vet who has lost both his legs. Al warns him not to try to get up. When Sam does get up at the end of the episode, the other person sees a guy with no legs floating in mid-air.
** Kids, animals, crazies, and psychics can see his true self.
* In ''DeadLikeMe'', the reapers look different to their true form to living people. We see "[=UnGeorge=]" in scenes through a living person's perspective.
* In ''[[{{Beetleborgs}} Big Bad Beetleborgs]]'', this was combined with TheNthDoctor when Shannon Chandler left the series: Halfway through Season 1, Wolfgang, while playing with a magic book, accidentally caused Jo to change in appearance. To counteract this, Flabber used his magic to make her look and sound just like herself, except to the people who saw him do the spell. So the viewers, Flabber, Drew, and Roland could still see Jo in her new appearance, played by Brittany Konarzewski, but the Hillhurst monsters as well as their family and friends could see her as she looked before. The psychological impact this would have on her brother and best friend was never addressed.
* ''Series/StarTrekTheOriginalSeries''
** In the episode "Spectre of the Gun", aliens put Kirk and company into a simulation of the gunfight at the O.K. Corral. They, and the audience, still see each other normally in their Starfleet uniforms, but the other people in the simulated town react to them as though they were Ike Clanton and company.
** In "The Man Trap", the salt vampire could make itself appear to be a specific person to everyone looking at it. Because of his long experience with it, Professor Crater could always recognize it no matter what form it took.
* The very special glamor spell used by The Charmed Ones in the early part of season 8 of ''Series/{{Charmed}}'' allowed everyone who knows them well enough to see them as they are (most notably the child who couldn't recognize his own mother anymore otherwise) but everyone else will see the glamor.
** Though they will see the glamor, and not themselves, in the mirror.
** The Stillman Sisters' identity theft spell, from The Power of Three Blondes, worked this way as well.
* An episode of ''Series/TheXFiles'' follows this trope when Mulder accidentally switches minds with an employee of Area 51. Mulder, due to his career in weirdness, is able to BS his way through the other man's life fairly well.
* In one episode of ''Series/LegendOfTheSeeker'', a witch casts a spell to make another man appear to be Richard, and vice versa. He doesn't realize it until they start treating him weird.
* In ''Series/StargateSG1'', Reoul venom can do this. Daniel Jackson uses it to infiltrate a Goa'uld summit meeting at one point, masquerading as a System Lord's personal trusted slave. At one point he questions what happens if you use the venom on yourself. Selmak replies "I don't actually know, and that alone should scare you." However, he has to inject every person he wants to see him as someone else. This becomes a problem when Osiris shows up in the host body of his ex-girlfriend Sarah, immediately recognizing him. Osiris then confronts Daniel, allowing Daniel to inject the Goa'uld. Osiris then forgets why she arrived.
** This is reused a few seasons later by Mitchell when infiltrating the Lucian Alliance as Netan's trusted advisor. It works because no one but Netan really knows what the guy looks like, so Cam only has to inject him. Then Tenat shows up, who has met Cam before but thinks that Cam is a bounty hunter who's running a con on Netan. Cam injects Tenat and convinces him that he's Netan.

* The ''TabletopGame/DungeonsAndDragons'' spell "[[ExactlyWhatItSaysOnTheTin Disguise Self]]".
* The "Illusion Disguise" spell in ''TabletopGame/{{GURPS}}: Magic'' works like this. "Perfect Illusion Disguise" will actually fool all five senses.
* In ''TabletopGame/ChangelingTheLost'', all changelings have been twisted and become inhuman, but normal humans instead see their ''mask'', a slightly altered human guise. The changeling, and other changelings (as well as the Fey), however, are all capable of seeing the changeling's true form. The "Rites of Spring" sourcebook has a segment that explains that the Mask actually covers all aspects of the Mien (true form), but it is weakest in disguising scent and taste.
* The "Familiar Stranger" power of ''TabletopGame/VampireTheRequiem'''s Obfuscate Discipline makes the target view the vampire as a person he knows or expects to see. What the target perceives is not communicated to the player. The example given has a Nosferatu use the power when entering someone's house; the owner's child sees his father, and the child's babysitter sees a man she assumes is the boy's father based on the available evidence.
* The Divine Fire hides a [[PrometheanTheCreated Promethean's]] true face. Given that Prometheans are animate ''corpses'', this is pretty much the only thing that keeps them from getting killed on sight (and [[HatePlague Disquiet]] means sometimes even ''that'' isn't enough). Prometheans can see each other's true faces, as well as how humans see them overlaid on it. There are, however, several ways to cause GlamourFailure, and those usually cause a ''world'' of problems...

* In the first ''VideoGame/LegacyOfKain'' game, Kain can get two spells that make him look like how he was when he was alive. These allow him to walk through towns without alerting the people.
* This is how the Spy's disguises in ''VideoGame/TeamFortress2'' work, in practice. It's speculated that his disguise kit uses some form of holographic technology. Still, to his team it just looks like he's wearing a [[PaperThinDisguise a cardboard mask of the guy he's disguised as]], so maybe they're all just idiots.
* A spell that disguises Owyn as a moredhel in ''VideoGame/BetrayalAtKrondor'' works like this.
* ''Franchise/{{Pokemon}}'': Zorua and Zoroark have the "Illusion" ability, which makes them appear as another pokemon (to the opponent) when sent out. Successfully hitting them dispels it.

* In ''Webcomic/ElGoonishShive'', Justin, Elliot, and Ellen can change their appearance through magical illusions. Nanase used to be able to do it best as a fully "awakened" magic user, but she burned out her magic powers, so she can't use any now.
** She then got her powers back. And then lost them again. And then got them back.
* In ''WebComic/EightBitTheater'', Red Mage casts an illusion spell on the Light Warriors that works this way. Since the change isn't immediately obvious, Black Mage spends a good deal of time mocking him for casting a spell that apparently did nothing before Red Mage gets a chance to explain.
* Robots in the ''Webcomic/{{Freefall}}'' world use transponders as the primary means of identifying each other. This means that a robot will "see" whatever the transponder tells it is there, [[http://freefall.purrsia.com/ff2200/fc02105.htm even if it wouldn't actually fit in the space available]], or if the transponder [[http://freefall.purrsia.com/ff2300/fc02296.htm is on an organic being rather than a robot]], or if [[http://freefall.purrsia.com/ff1400/fc01305.htm there's nothing there but the transponder connected to a battery]].
* Taraka from ''Webcomic/{{Kubera}}''. To Yuta she looks like his mother Kali. To everyone else she looks like a huge, vaguely humanoid EldritchAbomination.

* Happened a few times during the CrossoverWars: during the Forum Wars the Evil Overlord forces attacked the Wotch forum disguised as members of the [[Webcomic/ElGoonishShive EGS]] & [[Webcomic/CollegeRoomiesFromHell CRFH]] forums; during the Adult Wars Terry Dix cast a spell to make her & Miss Violence appear to be EOU droids & later convince the droids that M.Organ was Deception of the EOU.
* [[TheSlenderManMythos Slender Man]] was originally portrayed as this, to ''the entirety of humanity.'' Only cameras saw him as faceless, because, y'know, they're not alive. This was quickly dropped for plain [[TheBlank facelessness.]]

* In ''WesternAnimation/XMenEvolution'', Nightcrawler uses a kind of hologram field device to appear as a normal human being--pointed out in an episode where he had to wear gloves to the prom to prevent his date from catching on to the fact that he had two fuzzy fingers.
** He originally used one in the comics as well, but he mostly toyed with it to transform into famous movie stars or as a disguise. He stopped using it after a trip through space - mostly because FreakyIsCool.
*** And because he felt it was contrary to the mutants-are-okay message.
* On ''WesternAnimation/YoungJustice,'' [[spoiler:Artemis [[FakingTheDead fakes her death]], then uses a magic necklace to create a new persona and infiltrate the villains]]. The spell works on everyone but herself and the three others ([[spoiler:Dick, Wally and Kaldur]]) who are in on the plan.