History Main / ReallyWasBornYesterday

* Yaoyorozu's second major work after Kemono Friends season 1, ''Anime/{{Kemurikusa}}'', has something similar with the protagonist Wakaba. His childlike mannerisms and naivety are a problem in early episodes, but we later learn that [[spoiler:it's realyl because he was born only a short time before meeting the girls. He's a partial reincarnation of the original Wakaba, who really was and acted like an adult.]]

* ''Manga/MahouSenseiNegima'': It's noted at several points that despite being a middle-schooler, [[RobotGirl Chachamaru]] is technically only two years old.

* ''Comicbook/YoungJustice'': ComicBook/{{Superboy|1994}}. His exact age depends on the continuity, but he's generally freshly cloned.

* In ''{{VideoGame/Overwatch}}'', Orisa stands out as the exception to the robot rule mentioned about because her stated age is 1 month old, having been created by the (pre)teen genius Efi Oladele from the remains of an OR-15 robot that was destroyed in an attack by Doomfist. The developers specifically bring this up as something that makes her stand out from other heroes in the 'verse, some of whom have histories going back decades, and cited by Efi and herself as why she's still getting the hang of this whole "hero" business. For comparison the other Omnic who's a playable character, Zenyatta, is 20 years old and is portrayed as a wise mentor figure, even to characters who are older than he is.

* ''WesternAnimation/{{Pinocchio}}'': Due to [[ReallyWasBornYesterday being created suddenly on the night]], and being thrown into the world alone the following day with little knowledge of the world surrounding him, Pinocchio becomes an easy target for awful people to tempt him into going with them for their own shady benefit.

* In ''LightNovel/{{Overlord}}'', all of the Nazarick denizens started out as simple videogame NPC creations of Satoru's guild. Their existences as sentient living beings only started when they ended up in the New World alongside Satoru in his Momonga avatar. The contrast between their apparent ages and their actual ages is made clear in the Light Novel when it's noted that Sebas Tian, despite looking like an elderly gentleman and acting like one, is much younger than Climb.

** [[Recap/DoctorWhoS24E3DeltaAndTheBannermen “Delta and the Bannermen”]] features the Chimeron Queen Delta and her unnamed daughter, who in the course of less than a day hatches out of an egg as a green, big-headed monstrosity and grows to the size and general appearance of a young human teenager.

->"She has a newness. Everything is for the first time... If I had learned she had been born this very morning, I would only be surprised that she was so old."

!!Examples

* Combat Cyborgs Otto, Deed, and Sette from ''Anime/MagicalGirlLyricalNanohaStrikers'', who, despite looking like teenagers, have barely a month of real memories (since they were artificially aged and imprinted mainly with combat skills).

%%* In ''Manga/{{Trigun}}'' at least two of the characters are like this.

* The title character of ''Manga/MyDearMarie'' literally tells the rest of the cast she was in fact born yesterday, much to the consternation of her creator who is barely trying to cover up the fact she's a robot copy of the girl he has a crush on at school (Mari). That she does in fact act like this doesn't help either. Luckily, the real Mari just assumes she means it was her birthday.
* ''Manga/MahouSenseiNegima'': It's noted at several points that despite being a middle-schooler, [[RobotGirl Chachamaru]] is technically only two years old.

* In ''Anime/KemonoFriends'', the titular Friends are all LittleBitBeastly girls born from a live animal or biological samples of them coming into contact with [[{{Phlebotinum}} Sandstar]], and most of them are probably much younger than their appearances would suggest. The best example is definitely [[spoiler:Kaban/Bag, the TokenHuman]] who is at most a few days old by the end of the series since she was born during the last Sandstar eruption after a bit of it came into contact with [[spoiler:a human hair inside a lost hat]].

* ''Comicbook/YoungJustice'': ComicBook/{{Superboy|1994}}. His exact age depends on the continuity, but he's generally freshly cloned.

* Tesla, the title character in ''ComicBook/TheClockworkGirl,'' is only a day or so old when Huxley first takes her out to see the natural world. She's delighted with all the things she's seeing for the very first time. He responds that he thinks he's never really seen them before now, either.
* [[spoiler: Tailgate]], in ''ComicBook/TheTransformersMoreThanMeetsTheEye'' ends up being this: when we meet him, he's been in a form of stasis for six million years, long enough to be a peer of [[ReallySevenHundredYearsOld Cyclonus,]] which should make him one of the oldest members of the cast. [[spoiler: However, at one point, he reveals that he was created at Rivets Field. Cyclonus is surprised at this, pointing out that Rivets Field didn't fire up until shortly before the incident that placed him in stasis. Tailgate only confirms it: his body may have lasted eons, but his mind at the start of the series is only two weeks old.]]
* Victor from ''ComicBook/{{Runaways}}'' is a two-year-old cyborg who was built as a teenager and given fake memories to make him ''think'' he's a normal human teenager.

[[folder:Fan Fiction]]

%%[[folder:Films -- Animation]]

%%%* ''WesternAnimation/FrostyTheSnowman''
%%[[/folder]]

[[folder:Films -- Live-Action]]

** Ultron himself serves as an example; though unlike [[spoiler:The Vision who's described as naïve]], Ultron's lack of life experience, combined with a quick internet download, [[spoiler:drives him insane and convinces him that [[OmnicidalManiac Humanity needs to be culled.]]]]

%%* Simone in ''Film/S1M0NE''
%%%* Rocky from ''The Rocky Horror Picture Show

%%%* Literature/TheBible: Adam, then Eve.
* F. Scott Fitzgerald's ''The Curious Case of Benjamin Button", and the [[Film/TheCuriousCaseOfBenjaminButton film of the same title]]

* Elva from Christopher Paolini's ''Literature/InheritanceCycle'' aged physically to around five years old within a few days of her birth [[spoiler:because Eragon, in his attempt to bless her newborn self, bungled a syllable and accidentally [[CursedWithAwesome cursed her with the ability to "be a shield from harm" (instead of "being shielded from harm")]] ]]. What's even creepier is that while she aged physically to around five in that time, she mentally developed the intelligence, reasoning capacity, and ''cynicism'' of a woman with several decades under her belt.

* Thallo, from ''Paul of Dune'' is only nine, but appears seventeen or eighteen years old, his physical growth having been accelerated by his creators.
* [[spoiler:Gaia]], from the ''Literature/{{Gone}}'' series, was born four months after conception as a fully formed infant, and looked about sixteen years old after birth.
* The Scarecrow from Literature/TheWonderfulWizardOfOz was born two days before he met Dorothy for the first time.
* Ed'Bocaj from ''Literature/AlmostNight'' appeared as a child when she was but hours old, and reached full adulthood in days, and was born with the mind of an adult, though she acted childish for fun.

** Luke and Sky Smith from the ''Series/DoctorWho'' spinoff ''Series/TheSarahJaneAdventures''; Luke was genetically engineered into a teenage state, and Sky was introduced as a baby before rapidly growing to an appearance that resembled a twelve-year-old girl.
* Liam Kincaid, the protagonist of ''Series/EarthFinalConflict'' for seasons 2-3. Born with three parents (one of them an alien) he grows from infant to adult over less than one full episode.

* Adria, the humanoid CrystalDragonJesus of the Ori in ''Series/StargateSG1'', is carried for 9 months and born like any other baby, but she ages to young adulthood in about 24 hours.
* The penultimate episode of the fourth season of ''Series/StargateAtlantis'' introduces the clone of Doctor Carson Beckett (killed by an explosive tumour in the latter half of the third season), who was unaware that he was a clone until the expedition rescued him from his creator and carried out DNA tests.

* Rocky in "The Rocky Horror Show" (and its [[Film/TheRockyHorrorPictureShow film adaptation]]) is actually born onstage during the song "I Can Make You a Man". He's a real hunk of a man-baby, and (naturally) has the mind of a toddler, which makes it kind of concerning that his first sexual experience happens when he's less than a day old.

* Baton, the heroine of ''VideoGame/TadpoleTreble'' is literally born at the start of the game, thus making the first level a JustifiedTutorial, as her parents teach her the way the world works. Her curiosity also gets her caught by Coda the pelican when she ignores her mother's warning, setting the stage for the rest of the game. Sonata, another tadpole met in Midnight Bayou, is described as also being born yesterday in the Bestiary, which makes his [[PuppyLove sophisticated serenade to Baton]] that much funnier.
* The Sylvari from ''VideoGame/GuildWars: Eye of the North'' and ''VideoGame/GuildWars2'' are this, as they are a new race just getting their foothold. You actually get to see the 'birth' of the first Sylvari in a cutscene in Eye of the North.
* Grunt from ''VideoGame/MassEffect2'' is a [[DesignerBabies Designer Baby]] SuperSoldier and the only one of thousands that his Krogan creator Okeer thought was worthy, and he's basically born in your cargo bay when you release him from his tank. He does come with some NeuralImplanting, but you're the first person he actually talks to outside of Okeer talking to him while he was in his tank (when he was unable to respond). He was also deliberately designed to have his armored headplates not be fully fused together, unlike the adult Krogan, which is reminiscent of how the pieces of a human newborn's skull aren't fully fused until some time after birth.
* KOS-MOS from ''VideoGame/{{Xenosaga}}'' is activated for the first time during the events of the first game. Thus she is at her most robotic because she doesn't have personal data-experience. [[spoiler: Although she does share data with a buggy prototype that was activated once before.]]
* Rika from ''VideoGame/PhantasyStarIV'' is one year old, but looks just a little younger than Kyra, who is 18
* [[spoiler: Klaymen himself]] in ''VideoGame/TheNeverhood.'' The world is a kind of Eden (both metaphorically and, er, [[RuleOfSymbolism metaphorically]]), so it's not surprising there would be some literally new people in it.
* Mileena in ''Franchise/MortalKombat'', didn't qualify for this Trope for most of the franchise, which claimed she grew up with her “sister” Kitana, and was thus several centuries old. However, in ''Mortal Kombat 9'', the RetCon changes this so that Kitana meets her in the Flesh Pits right after she was “born”, meaning Mileena is more-or-less an infant (although "born" fully grown) as far as her true age is concerned.
* In the game's first hours, Roxas is a "newborn" so to speak in[[VideoGame/KingdomHearts358DaysOver2 Kingdom Hearts 358/2 Days]]. He barely knows any words, doesn't know what friendship means and he is clueless about just everything. Later on, he develops more and grows a spine, gradually becoming the way he was in Kingdom Hearts II. it's justified because [[spoiler: he is Sora's Nobody and born without any of his original self's memories]].

* Along the same lines as above, the ''VideoGame/GuiltyGear'' games have the Command Gear, Dizzy, who is technically only 3 years old, even though physically she looks like a young woman in her late teens or early twenties, due to the rapid development granted by her Gear cells. She's rather kind-hearted and gentle for a Gear, although this inevitably also comes with some social naivete.
* In ''{{VideoGame/Overwatch}}'', Orisa stands out as the exception to the robot rule mentioned about because her stated age is 1 month old, having been created by the (pre)teen genius Efi Oladele from the remains of an OR-15 robot that was destroyed in an attack by Doomfist. The developers specifically bring this up as something that makes her stand out from other heroes in the 'verse, some of whom have histories going back decades, and cited by Efi and herself as why she's still getting the hang of this whole "hero" business. For comparison the other Omnic who's a playable character, Zenyatta, is 20 years old and is portrayed as a wise mentor figure, even to characters who are older than he is.

[[folder:Web Comics]]

* Hanazuki, the title character of ''WebAnimation/HanazukiFullOfTreasures'', was born in the first episode, and we're reminded of it in episode two when she tells Sleepy Unicorn she ''was'' born yesterday.

* Peep in ''WesternAnimation/PeepAndTheBigWideWorld'' is a baby male chicken about as intelligent as a human first grader. In one episode he recalls his entire life, which actually did start yesterday.
* ''WesternAnimation/YoungJustice'': Superboy. Not quite "yesterday" but he's [[ArcNumber 16 weeks old]] in the first episode.

* The Canadian animated short ''To Be'' involves a teleporter that works by duplicating the "passenger" and killing the original. The film is about the inventor getting called out on the immorality of this. After the protagonist is responsible for [[spoiler: one iteration of the inventor getting killed, she atones for the crime by teleporting herself, reasoning that the guilty her has been executed, and the "new her" is innocent.]]

** Concept art for "Hit The Diamond" implies that one member of the [[AdorableEvilMinions The Ruby Squad]] sent to Earth, the one with the gem in her leg, was literally created one day before their mission, which explains her NaiveNewcomer personality and general lack of self-confidence.
** In "Know Your Fusion", [[spoiler:Smoky Quartz]] points out that they don't know that much about themself yet as, between their debut episode and this one, they've literally existed for about ten minutes total.
* In the ''WesternAnimation/StarFairies'' TV special, True Love, Whisper, Jazz, Spice, and Nightsong were created in an instant, and are instructed as to who Sparkle is and who they are.
* Cubert from ''WesternAnimation/{{Futurama}}'' was cloned from one of the Professor's more shapely back growths, and was 'born' as a young boy of around ten.

* In very rare cases, a person's brain can lose track of its entire memory making it seem like it has been 'wiped', such as in [[http://www.bbc.co.uk/news/health-13627118 this example]]. Victims generally retain a few links and don't lose everything, though it can happen. ([[ParanoiaFuel There are also very rare conditions where every memory can vanish, just like that, and with no warning at all]]).

[[folder:Films -- Animation]]

[[/folder]]

* ''ComicBook/TheSnowman''
* ''WesternAnimation/FrostyTheSnowman''
* ''Disney/{{Pinocchio}}'', a boy is carved from wood and brought to life.

* Leeloo in ''Film/TheFifthElement'' (although technically speaking she is an ancient supreme being who just has no real knowledge of modern Earth history after spending the last few thousand years in a form of suspended animation).
* The Phoenix in Music/KanyeWest's ''Runaway''
* Lisa in ''Film/WeirdScience''.
* To a limited extent, Simone in ''Film/S1M0NE''
* Rocky from ''The Rocky Horror Picture Show

* Literature/TheBible: Adam, then Eve.

* ''Literature/TheAdventuresOfPinocchio'', the original source.

* Dawn Summers in the fifth season of ''Series/BuffyTheVampireSlayer'' (although history was basically rewritten so that Dawn and all related characters all ''remember'' her having been there since the beginning).

** [[Recap/DoctorWhoS30E6TheDoctorsDaughter "The Doctor's Daughter"]] has the title character, an OppositeSexClone created when the Doctor was forced to stick his hand in a [[TrulySingleParent progenation]] machine at gunpoint.

* A common occurrence in ''TabletopGame/{{In Nomine}}'', where the angel or demon who was first sent to Earth this morning will nonetheless usually be wearing a body that looks like an adult human.
** Although they aren't usually sent to Earth immediately after their creation, still there's a major learning curve for those new to Earth no matter how old they actually are, and it has much the same effect.

* KOS-MOS from ''VideoGame/{{Xenosaga}}'' is activated for the first time during the events of the first game. [[spoiler: Although she does share data with a buggy prototype that was activated once before.]]

* Roxas in [[VideoGame/KingdomHearts358DaysOver2 Kingdom Hearts 358/2 Days]] in the game's first hours. He barely knows any words, doesn't know what friendship means and he is clueless about just everything. Later on, he develops more and grows a spine, gradually becoming the way he was in Kingdom Hearts II. Justified because [[spoiler: he is Sora's Nobody and born without any of his original self's memories]].

* In very rare cases, a person's brain can lose track of its entire memory making it seem like it has been 'wiped', such as in [[http://www.bbc.co.uk/news/health-13627118 this example]]. Victims generally retain a few links and don't lose everything, though it can happen ([[ParanoiaFuel there are also very rare conditions where every memory can vanish, just like that, and with no warning at all]]).

* Leeloo in ''Film/TheFifthElement''.

* Dawn Summers in the fifth season of ''Series/BuffyTheVampireSlayer.''

** Luke and Sky Smith from the ''Series/DoctorWho'' spinoff ''Series/TheSarahJaneAdventures''.

* Cubert from ''WesternAnimation/{{Futurama}}'' was cloned from one of the Professor's more shapely back growths, and was born as a young boy of around ten.

* In [[VideoGame/DevilMayCry]], V introduces himself to Dante saying "I have no name. I am but two days old… Just kidding. You can call me V." [[spoiler: He is only kidding about his name. At the time, he was ''literally'' two days old.]]

* In [[VideoGame/DevilMayCry5]], V introduces himself to Dante saying "I have no name. I am but two days old… Just kidding. You can call me V." [[spoiler: He is only kidding about his name. At the time, he was ''literally'' two days old.]]

* In [[[VideoGame/DevilMayCry5]], V introduces himself to Dante saying "I have no name. I am but two days old… Just kidding. You can call me V." [[spoiler: He is only kidding about his name. At the time, he was ''literally'' two days old.]]

* Rocky from ''Film/The Rocky Horror Picture Show''

* Rocky from ''The Rocky Horror Picture Show''

* Rocky from [[The Rocky Horror Picture Show]]