History Main / EnfantTerrible

It is sufficient to say that psychopathy manifests itself from a very young age, and there is some TruthInTelevision in this trope. However, any specific RealLife examples...no, thanks.

* Website/DeviantArt:
** [[http://akaichounokoe.deviantart.com/gallery/?q=secrets#/d5aq7jb Toki-Doki Rose (or Rose, for short)]] What'd she do back in Tokyo that would've landed her imprisonment had her mother not have left within 24-hours of them finding out? Well, she piloted a mecha-bot, destroyed half of Tokyo, and injured 200 people, making her far worse than her mother before her, something that got her compared to Stewie Griffin. Also, like Stewie, she is completely aware of what she is doing and she is about one. In fact, the vignette involving her secret is named "Infant Terrible".
** [[http://akaichounokoe.deviantart.com/gallery/?q=Madgie#/d4la3jj Madgie]], to a lesser extent or heavier one, in light of recent stories.

* [[EnfantTerrible/LiveActionFilms Film -- Live Action]]

[[folder:Video Games]]
* There are two in ''VideoGame/{{Bloodborne}}'', [[spoiler: One of them is Mergo, a stillborn [[EldritchAbomination Great One]] who influenced the Pthumerian bloodline of Queen Yharnam along with Cainhurst Vileblood, and the catalyst of the madness brought by the [[{{Necromancer}} School of Mensis]]. Another one is the Orphan of Kos, a child which a Great One gave birth to and the only heir from them, it's more than enough to cause havoc via mimicking a hunter.]]
* Bulleta/B.B. Hood from the ''Vampire''/''VideoGame/{{Darkstalkers}}'' series is a borderline example, as although she appears to fit it perfectly, it's sometimes implied that she's [[OlderThanTheyLook much older than she appears]].
* [[spoiler:[[BigBad Mary]]]] from ''Videogame/{{Ib}}'' is a rather powerful supernatural example of this trope. However, [[spoiler:she's actually a 400+-year-old painting who was created by the artist Guertena]].
* Played straight in ''VideoGame/MetalGearSolidPortableOps'', with a very, very deadly {{Child Soldier|s}} known as The Frank Hunter to the mercenary community, because of his habit of approaching his targets with nothing except a knife and an innocent cuteness that made it impossible for them to strike back. [[spoiler:He later ends up becoming Null, and Gray Fox, who is the Cyborg Ninja.]]
** More implied, but equally straight, the same series brings in a [[GovernmentConspiracy government cloning project]] to develop [[{{Tykebomb}} exceptionally gifted children]] who could be raised into [[SuperSoldier brilliant soldiers]] - this project created the main character and two {{Big Bad}}s. The name of the project? '[[TropeNamer Les Enfants Terribles]]'. It's not an example of this trope at the time the series takes place, though, because the trouble starts when the Enfants are all well into their thirties. We'll have to hope for Metal Gear Kids.
** Liquid is a confirmed EnfantTerrible, as he led a group of child soldiers in Africa and [[spoiler:managed to steal Sahelanthropus as part of his revenge against Big Boss]] well before his teenage years in ''VideoGame/MetalGearSolidVThePhantomPain''. Solidus may also apply, seeing how he was implied to have led a unit in the Liberian Civil War as a teenager (although in his case, everyone wasn't an adult).
** Raiden, who was raised to be a child soldier after his parents were murdered by Solidus, and placed in a unit of young boys that fought in the Liberian civil war. His nicknames were 'Jack the Ripper' and 'White Devil'. Carnage ensues in ''Videogame/MetalGearRisingRevengeance'' when he starts tapping into his 'Jack' mindset, especially considering he's a super-powerful cyborg instead of a preteen.
* [[spoiler:Iris Zeppelin]] in ''VideoGame/RosenkreuzStilette''. [[spoiler:Her central goal is to become god of a world of her own design, but most of her actions are [[ForTheEvulz solely for the hell of it.]] She believes that she has a right to destroy whatever she wants, and in turn commits wanton murder, of innocents; those she deems not useful to her; and her own family members, choosing victims based on who would suffer the most from their deaths. She's also a [[ManipulativeBastard very skilled manipulator]] as well, in fact, she masquerades as a harmless young girl while also staging in motion the war between the RKS and the Empire. In the second game, ''Rosenkreuzstilette Freudenstachel'', Iris and her [[TheDragon Dragon]], Eifer Skute, manipulate the Schwarzkreuz into starting a "witch hunt", and they even turn the Schwarzkreuz against their own captain Pamela by having them brand her a holy traitor to the Orthodox Church, motivating Pamela's resolve to slay her vilifier. Iris later had Eifer murder the pope, and afterwards, have her badly wound Pamela with a surprise attack. Iris continued to show her selfish and manipulative side by having Eifer turn into the Dark Devil and allowing her to die, and ''possessing [[TheHeroine Spiritia]]'' and forcing her to fight to the death against Freudia, her own childhood friend. Driven by little more than a sadistic desire to satisfy her lust for pleasure and entertainment over the suffering of others, Iris is a villain of the highest caliber despite her young age.]]
* The BigBad Manah in ''VideoGame/{{Drakengard}}'', the [[TheEmpress megalomaniacal empress]] and [[WhatDoYouMeanItsNotSymbolic feared high priestess]] of the [[ReligionOfEvil Cult of the Watchers]]...is a [[https://www.youtube.com/watch?v=BV6yvoEBRpo little blonde girl about six years old]]. She seems to be [[{{Cloudcuckoolander}} floating in the air without a care]] as far as her mental state goes when you first meet her, but then she speaks. And her voice has this odd habit of alternating between a cute girl's and an evil man's. Her eyes are also naturally [[RedEyesTakeWarning blood red]], which is just disturbing.
* ''VideoGame/ArcanaHeart'' has two:
** Kira Daidouji, an 11-year-old child genius who got fed up with having to return to Japan to mix in with the "normal kids". Her research on ether science has allowed her to create a large watery blob, whose body she uses for combat. Sounds normal at first, but when you consider she also wants to use that blob to help her TakeOverTheWorld, you're in completely different territory.
** Lieselotte Achenbach is a ten-year-old assassin who carries around the spirit of her dead older sister in a puppet with no legs.
* Independent adventure game ''Emily Enough'' features this as the player character: Emily decides, at her birthday, to slaughter her family. The rest of the game features her trying to get out of the asylum she ends up in. Emily herself seems quite comfortable with her new profession, too.
* Occurs occasionally in ''VideoGame/SuperRobotWars'', but most prominent with the leader of the Inspectors: Wendolo. Killed his own ''brother'' and threw away his QuirkyMinibossSquad without shedding a tear, felt no shame in desiring to enslave humanity and reduce them to mindless killing machines (Incidentally the ''exact'' same plan as that of the Balmarians, who were the sworn enemy of the Inspectors' superiors), refer to humanity as nothing more than a cancer that needed to be eradicated, and doing it all with a smug grin on his face.
* ''VideoGame/Fallout3'':
** Betty. She's the [[AGodAmI mistress]] of a LotusEaterMachine that ''would'' be a utopia if it wasn't for the fact that she likes to [[MoralEventHorizon sadistically torture people]] to relieve boredom. [[PlayerPunch And she forces you to help her]]. [[spoiler:Thankfuly, there's a [[MultipleEndings good end]] to this saga, which is thankfully fairly obvious (even if the code required to do so [[GuideDangIt isn't]]), in which you permanently kill her prisoners-which nets you [[MercyKill good Karma]].]] Betty is revealed to be [[spoiler:the avatar of a 100+-year-old MadScientist.]]
** In the same quest (and the entire game with a proper console code/mod) you can be one yourself. The biggest example perhaps being to kill Timmy's parents, and then brag to him about it.
** There's also the in-world, pre-war UrbanLegend of the "Pint-Sized Slasher" An unknown kid in a clown mask with a kitchen knife, going around killing adults. Whether he exists or not is up for debate, but Betty (Mentioned above) uses the legend for her own twisted enjoyment while you are in ''Tranquility Lane''. You can find what is supposed to be the Pint-Sized Slasher's mask in the ''Point Lookout'' expansion (In two locations, no less!)
* Downplayed with Flandre Scarlet from ''VideoGame/{{Touhou}}''. She is really [[OlderThanTheyLook 495+ years old]] but has the mentality and emotional maturity of a child. One of her main gripes is that whoever she [[AndCallHimGeorge tries to play with]], except for other uberpowered {{Big Bad}}s and main characters, tends to end up a splatter in the wall.
** Rumia, being a [[ToServeMan man]]-[[ImAHumanitarian eating]] [[CastingAShadow Darkness]] {{Youkai}} is this, too... or would be if it weren't for the fact that she's far too moronically inept to actually catch a human. (WordOfGod has it she regularly blinds herself with her darkness powers and then flies headfirst straight into trees.)
* ''Videogame/ThiefDeadlyShadows'' arguably fits the trope with [[spoiler:Gamall]] although since she's actually [[spoiler:using the form of a girl she killed many years previously, Lauryl]] it may be an "in name only" example.
* The [[http://www.nextdimension.org/other/doom3/cherub.jpg Cherubs]] from ''{{VideoGame/Doom}} 3''.
* ''VideoGame/OverlordII'''s Witch-boy would be this, if he were cute to begin with. At best he's sort of UglyCute... At least to [[VictoriousChildhoodFriend Kelda]].
* In ''JumpStartAdventures3rdGradeMysteryMountain'', the villainess is the SpoiledBrat daughter of a great [[TheProfessor Professor]] -- think [[Literature/CharlieAndTheChocolateFactory Veruca Salt]] with access to buttons that can [[TheEndOfTheWorldAsWeKnowIt destroy the world]].
* In the ''VideoGame/TotalWar'' series, one of the entourage members an assassin can get is an apprentice. The flavour text describes this trope.
* [[spoiler:Wendy]] in ''VideoGame/RuleOfRose'' isn't pure evil, but [[spoiler:she is the sweetest of the orphans capable of charming a delirious serial killer into dog-like obedience. She is also completely in love with the protagonist Jennifer, and the feeling is mutual, at least up to a point. Unfortunately "sharing" is a concept she has no use for.]]
* In ''VideoGame/DeadSpace'', we have Lurkers, though they actually qualify more as FetusTerrible. In ''VideoGame/DeadSpace2'', we have those, plus Crawlers (instead of fetuses, these are babies old enough to crawl...and they have [[ActionBomb an exploding sac]] on them) and The Pack (Bratty zombie kids...they don't have body-part weapons like most other necromorphs do, but they are fast and ''always'' [[TheSwarm attack in groups]])
* ''VideoGame/MadFather'': The eponymous character's psychopathy began with killing small animals as a child. [[FromBadToWorse Then it got worse.]] [[spoiler:It is also implied ([[NewGamePlus and then revealed on a second run]]) that Aya was this throughout the game. Notably, this is also the reason why her aforementioned father wanted to make her into a doll; he couldn't stand the thought of his daughter being 'dirtied' like himself.]]
* ''VideoGame/WorldOfWarcraft'' has Wrathion. He's manipulative, cruel, genius...and he's only two years old. Yes, he is a dragon, but Blizzard even said that other baby dragons are not like Wrathion. Wrathion is the way he is due to all the experiments performed on him when he was still in the egg. In Pandaria, Wrathion is portrayed as the OnlySaneMan alongside the bickering Horde/Alliance/Shado-Pan factions.
** In the 'Siege of Orgrimmar' raid, where, [[spoiler: after the player defeats Garrosh Hellscream, putting Troll leader Vol'jin in charge as the new Warchief]], Wrathion reveals that [[spoiler: he was rooting for the Alliance to win, having put effort into making sure they had their chance to dismantle the already-damaged Horde, becoming very angry that it didn't happen the way he wanted, and swearing that something bad was coming and he only wanted to prevent it.]] It turns out though that Wrathion's best intentions still backfired horribly, and end up leading to the bad thing he was trying to prevent happening.
** In {{Battle for Azeroth}}, Wrathion is working to save Azeroth, the Titan soul hidden inside the planet, from dying (as a result of the bad thing he foresaw and then accidentally caused). Wrathion is definitely a good guy, but GoodIsNotNice is very much true in this game. He does have a soft spot for new Alliance leader Anduin Wrynn, after the time they spent together in Pandaria.
* In ''VideoGame/CarnEvil'', the final boss of the Freak Show is a giant baby named Junior. He chases you around a giant playroom, hits you with his rattle, and vomits on you. If the machine owner finds this too disturbing, they have the option of replacing him with [[KillerTeddyBear Deaddy]], a giant teddy who fights in the exact same manner and uses the same baby talk voice clips.
* Danny and Demi from ''VideoGame/TheOutfoxies''. Conjoined twins separated by a train accident (never mind that conjoined twins are always the same gender), they took to contract killing. In their ending, they use the money they got from their assignments to [[spoiler:buy a lot of cake, purchase, shave, and tattoo a small dog, and ''set fire to Disneyland'']].
* ''Videogame/EarthBound'' gives us 12-year-old Porky/[[SpellMyNameWithAnS Pokey]] Minch. [[FromNobodyToNightmare He starts off as just your average worst kid in the neighborhood]], tries his best to be a big bad bully but just ends up looking like a loser, especially in comparison to his neighbor, Ness. [[spoiler:[[StartOfDarkness Then he gets involved]] with [[EldritchAbomination Giygas]]]]. Over the course of the game, he gradually commits worse and worse crimes, while simultaneously becoming more and more powerful. These include condoning human sacrifices, stealing a helicopter from a man of high authority, [[spoiler:dragging around Giygas's [[ArtifactOfDoom Mani Mani statues]] so as to corrupt all the people of the world]], and [[ArsonMurderAndJaywalking doing his business on the ground without burying it]]. Then, come the finale, [[spoiler:he's become Giygas's straight-up [[TheDragon right-hand man]], though because of the ambiguity of his dialogue, it's possible he's actually [[BigBadDuumvirate squarely on rank with him]], if not [[TheStarscream the one now pulling the strings]]. After attempting to kill the party, he unleashes Giygas and very nearly succeeds in destroying the entire world [[ItAmusedMe just for the fun of it]].]] And he does all this while behaving in a manner [[JerkAss very similar to [[WesternAnimation/SouthPark Eric Cartman]].
** ''VideoGame/{{MOTHER 3}}'' gives us a strange subversion: [[spoiler: Porky is back, and while it's revealed near the end of the game that he's physically aged himself thousands, if not tens of thousands, of years, he still has the exact same mind he had as a pre-teen boy. [[OmnicidalManiac He also wants to kill every person in the entire world other than himself]] just because [[ItAmusedMe it's his idea of fun]]]].
* Enforcer No. XV of Ouroboros in ''VideoGame/TheLegendOfHeroesTrailsInTheSky'' isn't called the [[NamesToRunAwayFromReallyFast Angel of Slaughter]] for nothing. [[spoiler: Renne]] turns out to be one of the most disturbing members of the group, relishing in describing the horrible ways she kills people and treating it all like a game. It's also a {{Deconstruction}}, as it's later revealed she only became that way due to suffering [[HarmfulToMinors horrific trauma when she was even younger]], and the main character desperately tries to get through to her. [[spoiler: She ''does'' eventually perform a HeelFaceTurn, but it takes a ''lot'' of effort.]]
* ''Videogame/ShawsNightmare'' has evil babies as an enemy. Plus they can also fly!
* One of the major {{Reveal}}s in ''VideoGame/{{Undertale}}'' is that [[spoiler:the first child who fell into the Underground--the "Fallen Child" who you're really naming at the start--wasn't nice. They hated humanity enough to commit suicide, painfully, for a ThanatosGambit that involved merging their soul with their adopted brother's body and stamping out a human village. If the player elects to follow the Genocide route, it's revealed that the Fallen Child and their violent tendencies have possessed the PlayerCharacter, and at the end, they wrest control of the game and murder the player]].
* It's not hard to interpret the kid from the [=Box10=] ''VideoGame/WhackYour'' games to be one of these, considering what he does to the burglar and his teacher for [[DisproportionateRetribution giving him detention]].
* ''VideoGame/StarCraft'' has Nova Terra. She becomes a WoobieDestroyerofWorlds as a preteen after her entire family is killed in an attempt to capture her. She was being captured because of her strong psychic powers. She ends up in the Ghost Program, which naturally has a TrainingFromHell regimen complete with thorough{{Brainwashing}}. After murdering quite a few people on the government's orders though, Nova starts to get back her former personality. This process is helped along by a few friends, and the Protoss leader Artanis. Eventually, she ends up joining a rebellion against the government. After the successful rebellion she overhauls the Ghost program to well...make it not abusive, since she has learned from the Protoss that there's no reason it needs to be. Even as an adult, the effects of her childhood abuse are evident though: she retains many childlike mannerisms, and a simplistic sense of morality.
* In ''VideoGame/TheDarksideDetective'', Emily the Bloodwolf is a sweet little girl who enjoys playing with fire and knives, and asks Santa for a chainsaw for Christmas.
* The Little Ones of ''VideoGame/TheSecretWorld.'' Also known as the Gaki, they're creepy, semi-spectral children with a movement pattern borrowed from the [[Series/DoctorWho Weeping Angels]], and they ''will'' kill you if you let them get too close. According to the lore, they can be found all over the world, and possess a wide variety of possible origins: some are [[UndeadChild the ghosts of children]] lashing out in rage over their untimely deaths; some are the [[{{Metamorphosis}} larval form]] of a very specific breed of demon; and a few are just [[VoluntaryShapeshifting shapeshifting]] predators that just [[ForTheEvulz happen to get off on killing people while dressed in the form of children]].
* ''VideoGame/TheElderScrollsVSkyrim'' has two examples:
** Babette appears to be an ordinary twelve-year-old girl. As you'll find out if you join the Dark Brotherhood, however, she's actually a [[ReallySevenHundredYearsOld three-hundred-year-old vampire]] with a taste for human blood and a pet [[GiantSpider frostbite spider.]] She's also one of the most skilled alchemists in the entire province, a skill which she puts toward the brewing of potent poisons for her fellow Brotherhood assassins.
** Nelkir, one of Jarl Balgruuf's children, seems to be a fairly ordinary spoiled brat like his brothers and sisters... until you start the quest 'The Whispering Door', and discover that ''his'' sullen attitude is more due to the fact that he's been serving Mephala, the Daedric Prince of Plots and Secrets, for some time. Once you've spoken to Mephala yourself, Nelkir will help you open the door where Mephala's artifact is hidden, even recommending that you kill the court wizard Farengar for the key, since 'no one will miss him, I assure you.' As a bonus, the quest was [[DummiedOut supposed]] to have an ending scene in which Balgruuf's children were all corrupted by Mephala and [[SelfMadeOrphan murdered him.]]
* Vitiate in ''VideoGame/TheOldRepublic'' and ''VideoGame/KnightsOfTheOldRepublic'' tortured his mother for SIX MONTHS before killing her and then gathered an army marched to the capital of his world where he was declared the Sith leader at 12.
[[/folder]]

[[folder:Western Animation]]
* Vendetta from ''WesternAnimation/MakingFiends'' isn't particularly cute, nor is she a DevilInPlainSight, but BOY is she sociopathic.
* Dexter's dad from ''WesternAnimation/DextersLaboratory'', apparently, when he and Dexter's mom turned into toddlers. During that time, Dexter's dad took pleasure at beating up Dexter's mom as a baby. Using Dexter's inventions to torture her.
* Professor Princess from ''WesternAnimation/TransformersAnimated'' dresses and acts like a young girl but has a psychotic obsession with destroying 'violent' toys, in one instance deactivating Angry Archer's explosive arrows because they were too destructive. However, she uses a wand-like item that destroys things in a blast of sparkles and flowers. Apparently, if there are flowers it's okay.
* Stewie Griffin from ''WesternAnimation/FamilyGuy'' is a comedy example; he's a sarcastic, ranting evil genius with a homicidal grudge against his mother, and he's only one year old.
** Maybe Eliza Pinchley. Vowed to viciously kill Lois and meant every single word... She hasn't actually attempted it, though, and her character will probably never return to ''Family Guy''.
** Also Bertram, who in his most recent appearance has become an OmnicidalManiac.
** And Penelope (voiced by Cate Blanchett), who is much like Stewie in the early days, except even more blood thirsty and sociopathic. She even managed to do something Stewie was unsuccessful at--killing her own mother.
* ''WesternAnimation/BobsBurgers'':
** Louise Belcher is an adorable little nine-year-old girl with a bunny-ears hat on all the time and is by far the most demented member of the family, and certainly the resident NightmareFetishist and [[TheGadfly Gadfly]]. In "Ears-y Rider", a teenage bully stole her bunny-ears hat, [[DisproportionateRetribution so she convinced a biker gang to threaten to slice one of the guy's ears off.]]
** Kendra from "Sit Me Baby One More Time" seems sweet, but she turns out to have a lot of creepy habits, like talking through [[CompanionCube her teddy bear, Mr. Boom-Boom]], and trying to [[GroinAttack kick people in the "tinkle-dink"]] when they make her mad.
* In ''WesternAnimation/BatmanTheAnimatedSeries'', Baby Doll is a washed-up actress with a bizarre debilitating condition that makes her look permanently like a child regardless of her age. The fact that no one takes her seriously as an adult ruins her life and she becomes insanely fixated on the mannerisms and environment of her one successful role. Therapy can help, and she's actually pretty nice when she's not crazy. She just has a BIG BerserkButton.
* José from ''WesternAnimation/{{Cybersix}}'' is the clone and "son" of the show's BigBad, and carries out his father's plans in almost every episode. He's also a stuck up, ill-tempered, and bossy little boy.
* Many of the younger ''WesternAnimation/SouthPark'' characters have moments of this:
** [[BreakoutCharacter Cartman]], the racist, bigoted, murderous, self-centered VillainProtagonist. While his attempts at being cute aren't always very successful, he is still without a doubt, the most manipulative character in the show and is quite psychopathic.
** Wendy Testaburger. In the episode "Tom's Rhinoplasty", where she gets hot substitute teacher Ms. Ellen shot into the sun by Iraqis in a fit of jealousy.
** Professor Chaos! Bringer of destruction and doom! Although he isn't [[HarmlessVillain that threatening]] and is more likely to PokeThePoodle than KickTheDog.
** Possibly Ike, who helped pull off a jewel heist by pretending to be an innocent boy with an injury.
* Mandy from ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', despite having a DeadpanSnarker and EmotionlessGirl personality, is young enough and psychopathic enough to qualify.
* All of the main cast in ''WesternAnimation/LilBush''. Then again, they're StrawmanPolitical SpinoffBabies based on [[NoCelebritiesWereHarmed real politicians]].
* The titular ''WesternAnimation/BebesKids'', three young delinquents who cause trouble and eventually the whole amusement park to fall apart towards the end.
* Darla Dimple from ''WesternAnimation/CatsDontDance'' is a psychotic child actress.
* Three-year-old Angelica Pickles, of ''WesternAnimation/{{Rugrats}}'', is mean to the babies but sweetness and light to the adults. By the time of ''WesternAnimation/AllGrownUp'', set 10 years later, she is less able to get away with this.
** Then there's her [[NightmareDreams dreamed up]] baby brother of horror, that for the sake of identification will be called Drewie. Be glad that that hell baby wasn't a real ''Rugrats'' character.
** Speaking of real ''Rugrats'' characters, there's Josh, the title character in the episode "New Kid in Town" who picks on the babies and at one point almost kills them, only to get stood up by, of all people, [[HypocriticalHeartwarming Angelica]].
* Maggie from ''WesternAnimation/TheSimpsons'' has exhibited increasingly severe cases of TroublingUnchildlikeBehavior.
** Bart's evil conjoined twin Hugo in a ''Treehouse of Horror'' episode: "A routine soul smear revealed the presence of pure evil." [[spoiler:But since Bart does pranks on a regular basis, it then turns out that Bart was the evil twin and the results had been mixed up.]]
** Speaking of Bart, [[FetusTerrible he mooned Doctor Hibbert and Marge on the ultrasound.]] When he was ten minutes old he set Homer's tie on fire with a lighter.
** Sideshow Bob's infant son Gino not only inherited his father's palm tree hair but also his murderous hatred of the Simpsons and love of knives.
* A young princess [[TeensAreMonsters Azula]] (as seen in flashbacks) from ''WesternAnimation/AvatarTheLastAirbender'' skillfully combines an [[DeliberatelyCuteChild angelic smile]] with both CreepyChild and EnfantTerrible behaviour (read: smirking at her grandfather's funeral and telling her brother that their father is going to kill him, the latter of which was sadly true).
-->'''Azula:''' My own mother thought I was a monster. She was right, of course, but it still hurt.
* ''WesternAnimation/{{Ben 10}}'' had Ben's EvilCounterpart, 11-year-old sociopath Kevin 11, who was willing to kill hundreds of innocent civilians as part of a heist attempt in his first appearance (all previous villains on the show had fairly standard Saturday Morning Supervillain plots, Kevin's was the first to really be over the line by Ben's standards) and just got crazier from there. Unlike most examples of this trope, Kevin actually grew out of it in the sequel series. [[spoiler: Kevin's also a Human/Osmosian hybrid, and the Osmosian tendency to go bonkers when absorbing energy doesn't help his sanity.]]
* Suzy Johnson, Jeremy's little sister on ''WesternAnimation/PhineasAndFerb'', acts sweet and innocent in the eyes of her brother, but when she crosses paths with his girlfriend, Candace, she shows her TrueColors when Jeremy isn't looking.
** She is also apparently the most horrible thing in the world to Buford, the local bully, who all the other kids fear.
* Charles aka Brainchild from ''WesternAnimation/TheTick'', a ludicrously intelligent kid (he mastered quantum physics before he could walk, among other things) whose desire to become a CardCarryingVillain is met with benign acceptance by his hippie family.
* Heloise in ''WesternAnimation/JimmyTwoShoes''. She's a small girl who works in Misery Inc. as [[MadScientist top inventor]] to create dangerous products for misery and she loves to destroy stuff. She is also [[AxCrazy easily angered]] and hates nearly everyone but the [[MoralityPet titular character]].
* [[CreepyChild The Delightful Children from Down the Lane]] from ''WesternAnimation/CodenameKidsNextDoor''. Not only have they attempted to kill the main characters, but they also reached a whole new level of creepy in season four when they were going to [[ImaHumanitarian eat a cake made from other children]]. [[spoiler:Although in TheMovie it turns out they were BrainwashedAndCrazy]].
* Ren Hoek of ''WesternAnimation/TheRenAndStimpyShow'' was portrayed as one of these in the Adult Party Cartoon episode "Ren Seeks Help". As a child, he was playing innocent to his parents, but without supervision, he is shown committing acts of vandalism such as setting fire to buildings and torturing and killing animals. He gets away with it until one of his victims (a frog) tells his parents about what he's been doing. After some lecturing on the horrible things he's done, they tell him the only thing he can do for the frog is put it out of its misery - rather than do this, he chooses to let the frog go and suffer more, leading to its eventual suicide.
* ''WesternAnimation/TheBoondocks'' episode "Smokin' with Cigarettes" featured Lamilton Taeshawn, a psychotic young boy from a broken family who lived with his grandmother. He claimed he did terrible things, not for sympathetic reasons, but because he liked to cause people to crash in their cars, break people's arms, and assault elderly people including his grandmother. He killed a dog and later attempted to kill [[EvenEvilHasStandards Riley]] when Riley told him he didn't want to be friends anymore.
** The character of Lamilton was based on a boy named Latarian Milton, who stole his grandmother's car at the tender age of seven. When asked why, he responded "I want to do it because it's fun. It's fun to do bad things. I wanted to do hoodrat stuff with my friends," one of whom "smokes with cigarettes". The next month, young Latarian was back in the news -- for beating up the same grandmother in Wal-Mart because she wouldn't buy him chicken wings. He was subsequently arrested.
* An episode of ''WesternAnimation/NightmareNed'' had a [[IncredibleShrinkingMan doll-sized]] Ned being tormented by a pair of twin cousins in one of his nightmares which is no spoiler. They weren't half as bad in reality.
* Sarah from ''WesternAnimation/EdEddNEddy'', Ed's little sister. She enjoys beating up the whole main trio, [[JerkAss especially Eddy]], who are all older than her and boys, for goodness' sake. Normally, she wears a facade that makes her looks sweet and nice, but she very often uses the argument of "telling mom" (and others, which include her attempting to suffocate herself) to manipulate Ed.
* In ''WesternAnimation/TheAmazingWorldOfGumball'', [[ChildProdigy Anais]] was revealed to have been this as an infant in the episode "The Rival". Within minutes of being born, she shoved Gumball and Darwin out of a moving car, [[SiblingMurder attempted to kill them on several occasions]], and got them in trouble with their parents. She's a lot more mellow in the present day, however.
* Li'l Gideon from ''WesternAnimation/GravityFalls''. In his debut episode, he is so attached to Mabel that he actually attempts to kill Dipper after the latter tells him that Mabel doesn't want to go on any more dates with him, thinking that Dipper has "come between" him and Mabel. He is also ''extremely'' crazy about obtaining the Mystery Shack, going as far as summoning a demon to enter Stan's mind and retrieve the combination to a safe containing the Mystery Shack deed in order to get it. He also [[spoiler:attempts to kidnap Mabel in a giant robot in the season 1 finale]].
* Cousin Eddy from ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'', is only 17 months old.
* Princess Morbucks of ''WesternAnimation/ThePowerpuffGirls''. A wealthy and spoiled bully.
* Porky Pig's toddler charge in the WWII-era cartoon ''Brother Brat''. The kid's mom (a welder at Lockheed who leaves the kid for Porky to babysit) gives Porky a manual on child care. At the end of the cartoon, the mom shows Porky how to use the manual correctly (it's spanking).
* [[spoiler:Hansel and Gretel]] in ''WesternAnimation/HoodwinkedTooHoodVersusEvil'' take this trope UpToEleven.
* In ''WesternAnimation/AdventureTime'', Goliad becomes this after spending time at a daycare and seeing displays of authority and power succeed where diplomacy fails. This is especially bad since she's an immortal with PsychicPowers up the wazoo.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** There's [[AlphaBitch Diamond Tiara]], who regularly bullies Apple Bloom for not having her cutie mark. In a later episode, she forces the Cutie Mark Crusaders to continue their tabloid racket with the threat of leaking out embarrassing photos of them. In another, she bullies young pegasus Scootaloo for being unable to fly, which may or may not be a disability. She grows out of it in "Crusaders of the Lost Mark," when it's revealed her mother was the root of her bullying and she stands up to her, expressing her desire to have friends.
** From the Season 8 finale, [[spoiler:[[BitchInSheepsClothing Cozy Glow]]]] actually has plans to take over Equestria and almost succeeds.
* ''WesternAnimation/{{Sixteen}}'' has Stanley, a young boy who attacks people with a ball launcher, embarrasses and insults anyone he doesn’t like, and destroys mall property. The worst part? His mom knows what he’s doing, and lets him get away with it.
* Flick Duck of ''[[WesternAnimation/PBAndJOtter PB&J Otter]]'' is a mild example. He generally behaves very sweetly and nicely around adults, with "Yes, sir" and "No, ma'am" and all of that, but often gets up to mischief the second he's out of their sight, or at least he thinks he is. He's not without a conscience, though, and can also sometimes be genuinely friendly and nice.
* Pete Jr. in the WesternAnimation/DonaldDuck cartoon "Bellboy Donald" mercilessly abuses Donald for no reason at all, including tricking him, exploiting the fact Donald is disallowed by his boss to do anything about it, trapping him in midair in an elevator even after he begs to be let down, and sending him electric shocks through tampered wiring. Donald gets to spank him in the end. Fifty years later, the concept of a Peter Jr. [[WesternAnimation/GoofTroop shows up again]] as [[CharacterizationMarchesOn a diffident, obedient underdog]] with a completely different appearance.
* In ''WesternAnimation/TheRealGhostbusters'' Fritz actually complains about how often creepy kids show up, right before an attack by three more evil ghost kids.
* [[EvilTwin Foop]] on ''WesternAnimation/TheFairlyOddparents'' is a magical G-Rated version of [[WesternAnimation/FamilyGuy Stewie]].
** Remy of ''WesternAnimation/TheFairlyOddparents'' who mostly wanted to make Timmy miserable because he was not as happy as Timmy.
** One of Cosmo's and Wanda's former godchildren, Maryann, was responsible for assasination of Archduke Franz Ferdinand, which caused the World War I.
* Vendetta from ''WesternAnimation/MakingFiends''. She lives up to her name, overuses the word "stupid", can make horrifying monsters out of everyday objects, shrunk her own parents down to rodent-size while growing her hamster to human-size, enjoys nothing more than to see others suffer, rules Clamburg with an iron fist, and couldn't be more than ten.
* ''WesternAnimation/BarbieAndTheSecretDoor'' has Malucia, who plans to take over the world at age 10 and uses a magic-draining scepter to scary effect.
* The [[WesternAnimation/InspectorGadget2015 2015 Inspector Gadget cartoon]] gives Dr. Claw a nephew named Talon, who is all too eager to follow in his uncle's footsteps.
* ''WesternAnimation/RickAndMorty'':
** Evil Morty, the 14-year-old alternate reality version of Morty from the episode "Close Encounters of the Rick Kind" was revealed to be the one responsible for the deaths of dozens of Ricks and the enslavement and torture of dozens of Mortys across multiple universes. He also presumably murdered his own Rick and replaced him with a robot.
** "The ABC's of Beth" reveal that Beth was a complete psycho as a child, which she's in denial about in the present. She pushed a neighborhood kid into a pool of honey and left him for dead in a PocketDimension created by Rick, apparently just because she was jealous that he had a father who paid attention to him. When Rick says the point of the place was to keep the other kids safe from Beth, she doesn't believe him, causing Rick to go on a rant showing her [[TheLongList some toys he made for her in her youth]].
--> '''Rick:''' Look at some of the shit you asked me to make you as a kid: ray-guns, a whip that forces people to like you, invisibility cuffs, a parent trap, a lightning gun, a teddy bear with anatomically correct innards, night vision googly eye glasses, sound erasing sneakers, false fingerprints, fall asleep darts, a lie detecting doll, an indestructible baseball bat, a taser shaped like a ladybug, a fake police badge, location tracking stickers, rainbow colored duct tape, mind control hair clips, poison gum, a pink sentient switchblade.
** The Lucky Charms[=/=]Trix parody commercial from "Rixty Minutes" features a cheerful leprechaun being pinned down and disemboweled by [[DissonantSerenity completely emotionless]] evil children who ''rip out his intestines and eat the cereal out of his runny innards while he screams in agony and begs to die''. Even Morty is left horrified by it. [[FridgeHorror Just what kind of fucking universe is this level of extreme torture on a sapient being considered lighthearted children's entertainment!?]]
* Claire Brewster on ''WesternAnimation/{{Beetlejuice}}''. A narcissist whose attempts to humiliate Lydia Deetz would work if not for the Ghost With The Most.
* Diesel Oyl, the niece of Olive Oyl on the Al Brodax ''{{Popeye}}'' cartoons.
* Lola Loud from ''WesternAnimation/TheLoudHouse''.
* Presumably, Evil Julian from ''WesternAnimation/RandyCunninghamNinthGradeNinja''. He's an EvilCounterpart to Julian, a 9th-grader, which would mean that Evil Julian would be as old as him. That aside, he becomes the BigBad of season 2, and he's [[SoftSpokenSadist really]] [[WhiteHairBlackHeart unsettling]] [[LightIsNotGood in general]].
* [[IronicName Scruples]] in ''WesternAnimation/TheSmurfs''; Gargamel's apprentice was put under Gargamel's custody because of his bad behavior even for witches' standards.
* Mr. Cat from ''WesternAnimation/{{Kaeloo}}'' isn't actually an adult; according to the 34th episode, he's YoungerThanHeLooks and is less than 13 years old. He's also a psycho who threatens people with weapons for petty reasons, bullies his own friends and displays several signs of TroublingUnchildlikeBehavior.
* ''WesternAnimation/DuckTales2017'':
** Louie gladly admits to being the "evil triplet", but this is {{downplayed}} quite a bit, usually expressing as him being [[TheSlacker lazier]] and [[GuileHero less scrupulous]] than his brothers.
** Doofus Drake is introduced in "Day of the Only Child!" as a SpoiledBrat who spends the massive fortune he inherited from his beloved "Gumeemama" Frances indulging his every childish whim and treating other people (including his own parents) as either servants or playthings.
* Harold, the nephew of [[CorruptPolitician Mayor Humdinger]] from the ''WesternAnimation/PAWPatrol'' special "Mighty Pups" counts, being willing to help out his uncle with his plan to steal a meteor from a museum. He also trapped [[TheLeader Ryder]] inside [[HomeBase The Lookout]] to stop him from interfering, and later betrayed his uncle and stole the meteor for himself, using the power he got from it to create a HumongousMecha for himself and using it to round up the PAW Patrol pups. At the end, he and his uncle are forced to clean up the mess Harold made around Adventure Bay with the mecha as punishment for their actions.
* In ''WesternAnimation/MiraculousLadybug'', BigBad Hawk Moth has the ability to grant people superpowers by keying into and amplifying their negative emotions. He typically akumatizes teenagers or adults, but on the occasions that he targets children, they're no less of a threat.
** Baby Auguste maintained his childlike innocence and wouldn't take Hawkmoth's directions to attack Ladybug and Cat Noir, but [[AttackOfTheFiftyFootWhatever a baby the size of a building]] can't really help but do some serious damage.
** Manon was frustrated about losing a game against Marinette when Hawkmoth found her, and since it was Marinette playing as Ladybug and Cat Noir versus Manon playing as the villains, she was already more than willing to attack the actual heroes.
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/AgentsOfSHIELD'': One "gifted" turns out to be a young girl who "leeches" emotions (essentially she can MindRape anyone she touches, turning them into thralls). She is also completely insane. Her control ''also'' extends to her being able to ''kill any thrall just by willing it.'' [[spoiler:May is traumatized by being forced to kill the girl]].
%%* Bobut on ''Series/AliensInTheFamily''.
* ''Series/{{Angel}}'' had [[Recap/AngelS01E14IveGotYouUnderMySkin an episode]] where a little boy was possessed by a demon and doing horrible things. They exorcise the demon but find out from the demon (who begged to be killed) that it was the boy himself who didn't have a soul to begin with, and that the demon had been trapped.
* ''Series/BreakingBad'' has Tomas Cantillo, an 11-year-old boy who shot and killed Jesse's friend Combo as part of his initiation into a street gang.
** Tuco Salamanca when he was a child, judging by a family photograph in the episode "Face Off". Though given the way [[AbusiveParents he was raised]], it's not surprising.
* ''Series/BuffyTheVampireSlayer'': Hansel and Gretel, a single demon that takes the form of two dead (and later living) children apparently murdered by occult forces to cause the mothers of Sunnydale to try to kill all the other supernatural elements. Under their influence, Buffy's mom, Willow's mom, and several others attempt to burn Buffy, Willow, and Amy at the stake. It doesn't work so well when Hansel and Gretel are turned back into a big ugly demon, though. Apparently, the original story of Hansel and Gretel was based upon an earlier more successful attempt by the same demon in Germany.
** The Anointed One, the boy who was turned into a vampire and was supposed to help the Master scape his prison.
* ''Series/CriminalMinds''
** In the episode "The Boogeyman" it's revealed the killer was a 12-year-old boy who would lure other children into the woods, then beat them to death with an aluminum baseball bat.
** "A Shade of Gray" reveals the (main) killer was a child sociopath who had murdered his younger brother by cramming model plane parts down his throat after his younger brother broke the model plane by accident. He also killed the family's puppy.
** The episode "Safe Haven" had a 13-year-old sociopath on a cross-country killing spree, slaughtering entire families by gaining their trust with his seeming innocence in order to get access to their homes.
* ''Series/{{CSI}}'':
** Hannah West is a 12-year-old child prodigy who successfully got her brother released by [[spoiler: planting evidence to implicate herself]] and then turned into a {{Yandere}} when her brother paid more attention to his girlfriend than to [[BrotherSisterIncest her]]. The case she first appeared in was actually the one that pushed Sara Sidle over the edge and made her leave. After she came back, she was very visibly shaken when she had to deal with Hannah again.
*** In that episode, Sara tries to convince Hannah her brother turned on her to trick a confession but Hannah sees through it. Later in the second episode, Sara breaks it to Hannah that [[spoiler: her brother killed himself out of grief for his second girlfriend being killed by Hannah. Hannah scoffed "this is just a sad and desperate ploy, Sara" until the photos of the body made her realize the only person she ever cared about was dead and broke down crying.]]
** Then there were the little bundles of horror that were the killers in "Bad Words" and "Cats in the Cradle." The killer in "Go To Hell" also had an early-teens accomplice who was arguably an even worse person than he was[[note]]He was a pedophile preying on her, but she used that to her advantage by promising to be with him if he killed her family; still, she's young enough that we can still feel for her when [[spoiler:she herself is murdered by TheFundamentalist]][[/note]]. Oddly enough, subverted with the killer in "Gentle Gentle," the actual youngest perp seen on the show... who was too young to know what he was doing.
** The role played by (''sigh'') Music/JustinBieber as Jason [=McCann=]. This may be one of the worst ones on this list (even though he's not taken seriously because he seems "girly") because instead of sadistic sadism, he cunningly plans, [[spoiler:kills three police officers]], and does this all by [[spoiler:trying to [[MadBomber bomb the living shit out of them!]]]] It is, however, worth it in the end when [[spoiler:he gets shot to death by the authorities after shooting one of the officers.]]
* In ''Series/DesperateHousewives'', Kayla, Tom Scavo's illegitimate daughter, became this. At first, she was just cold to Lynette, who her conniving mother Nora had told her wanted to take her (Kayla) away from her (Nora), which was true, but only to get her away from Nora's crazy. But then the next season, Kayla does increasingly outrageous things, from convincing her half-brothers to jump off the roof to claiming Lynette abuses her, all in the name of getting Lynette out of the picture so she could stay with her father.
* ''Series/DoctorWho'':
** In "[[Recap/DoctorWhoS3E7TheCelestialToymaker The Celestial Toymaker]]", Cyril is what Billy Bunter of Literature/{{Greyfriars}} would be if he were a PsychopathicManchild's slave. He crosses the MoralEventHorizon in episode 4 when [[spoiler:he attempts to trip Steven and Dodo up so they get a lethal shock from the hopscotch floor]]. However, [[spoiler:he gets HoistByHisOwnPetard]].
** In "[[Recap/DoctorWhoS25E1RemembranceOfTheDaleks Remembrance of the Daleks]]", a girl is possessed by the Dalek battle computer.
** In [[Recap/DoctorWhoS29E8HumanNature "Human Nature"]]/[[Recap/DoctorWhoS29E9TheFamilyOfBlood "The Family of Blood"]], another girl is overwhelmed by the gaseous entity "Sister of Mine", taking over her lifespan. The same musical theme is used in both cases.
** The trope is also toyed with in "[[Recap/DoctorWhoS32E12ClosingTime Closing Time]]". The Doctor, who claims to be able to speak baby, tells Craig that his infant son Alfie prefers to be called "Stormageddon, Dark Lord of All". There's no indication that he's an actual evil baby, though.
* Little sister Megan on ''Series/DrakeAndJosh'' is an evil, conniving brat to the titular characters, but acts sweet and adorable to everyone else.
** Brat doesn't really cover it. She's a pre-teen supervillain. She's got a hidden high-tech lair in her bedroom disguised as girly toys and pictures. Seriously.
* The first episode of ''Series/EleventhHour'' features [[spoiler: an 11-year-old NietzscheWannabe who kills off classmates to raise test scores.]]
* In the ''Series/{{Evil}}'' episode "Rose390," the team is asked by a couple to help their young son, Eric, who they believe is possesed. While interviewing him, Eric, who speaks in a very creepy monotone voice, talks about all the terrible things he has done, including trying to poison his parents and biting his baby sister just because she wouldn't stop laughing. Later on, Eric actually tries to drown his sister in his family's pool and almost succeeds if David hadn't saved her. At the end of the episode, the team is ready to perform an exorcism, only to find a cop car in front of the house and they are soon informed that Eric is missing. The mother claims that Eric ran away, but it's heaviley implied that she killed him in order to protect the family.
* ''Series/ForeverKnight'' Lacroix's daughter-turned-sire, Divia, whom he staked after she tried to seduce him but who came back and started killing his friends in the modern day.
%%* ''Series/GameOfThrones'': Cersei was no more charming when she was younger. (See above under Literature.)
* In Season 5 of ''Series/{{Grimm}}'', Adalind and Renard's daughter Diana returns as a powerful and creepy preteen Hexenbiest (well, technically, she's 3/4 Hexenbiest and 1/4 Royal), who [[spoiler: kills Renard's girlfriend for standing in the way of her parents getting back together, and Boneparte, the leader of Black Claw, for hurting Adalind]]. Then someone decides it's a good idea to kidnap her. Renard, for his part, almost immediately realizes that it's the kidnapper, who should be sorry, and doesn't even worry.
%%* ''Series/HannahMontana'' has Rico. He has the makings of an EvilGenius.
* The apparent physical age of immortals from ''Series/{{Highlander}}'' is fixed at the age of their first death; two episodes featured a [[Really700YearsOld centuries old]] Immortal in the body of a 12 year old. Kenny has survived for hundreds of years by playing on his youthful appearance and the sympathies of older kind-hearted Immortals for protection since he's at a severe physical disadvantage. Then he takes their heads when their back is turned. Amanda ''especially'' grabs the IdiotBall where Kenny is concerned, since she was the Immortal who originally discovered him (prior to his FaceHeelTurn when he really ''was'' an innocent boy) and refuses to believe Duncan's warnings, even though [=MacLeod=] already had several prior encounters with him.
%%* Chuck in several episodes of ''Series/ICarly''.
%%** A later episode reveals he has a younger brother named "Chip", who is just as bad (''if not worse'') as Chuck.
* In the ''Series/ILoveLucy'' episode "The Amateur Hour", Lucy babysits twin boys. While playing CowboysAndIndians, they tie her up, intending to burn her at the stake (and though it's PlayedForLaughs, [[TroublingUnchildlikeBehavior they are serious]] about it!). A phone call from their mother interrupts them, but even when told what they've been up to she is oddly calm about the whole thing. All they get is a mild warning that their father would spank them both if they burned one more sitter at the stake. So, [[FridgeHorror frighteningly enough]], they've apparently done it before...
-->'''Mrs. Hudson:''' Boys, is Mrs. Ricardo [[ManOnFire on fire]]?
%%* Madison in the "Everything Nice" episode of ''Series/TheInside''.
* ''Series/KamenRiderZiO'': Heure enjoys causing chaos and toying with his [[VictimOfTheWeek victims]] unlike his older and more pragmatic fellow [[YourTerroristsAreOurFreedomFighters Time Jackers]], a loose group of time travelers trying to bring about a reign of evil overlord under their command. He is also consistently the most active and crafty one, resulting in stuff like invicible mirrors monster or zombie apocalypse.
* The various ''Franchise/LawAndOrder'' series like to play with these, and especially emphasizes the handwringing "what can we do, the legal system can't handle such a monster without exploiting innocent kids!" response.
* The ''Series/LawAndOrder'' episode "Killerz" featured a ten-year-old girl named Jenny Brandt who [[DoesNotLikeMen has serious ISSUES with the male gender]]: she would rip out the eyes out of males in pictures, poisoned a cat just to watch it die (and doesn't flinch when the psychiatrist yells at her for it), scared her nanny into doing her bidding... and murdered a younger boy and stuffed a battery in his mouth. And is apparently completely incapable of feeling a shred of remorse. She gets off, based in part on the argument that she's too young to fully understand death, and the last shot has her coolly regarding another young boy, with the implication that more death is in her future.
-->'''Emil Skota:''' Emotional abuse, the snuffed cat, the blacked-out photographs. Her lack of response when I went after her.\\
'''Jack [=McCoy=]:''' Her fantasies about hurting little boys."\\
'''Emil Skoda:''' Yeah. Previews of coming attractions. She's graduated to murder. She's not gonna stop.\\
'''Abbie Carmichael:''' You sound pretty sure.\\
'''Emil Skoda:''' Kid's a done deal. She's a textbook serial killer. We just got her early.
* ''Series/LawAndOrderSpecialVictimsUnit'':
** There was an episode with a set of CreepyTwins, one male and one female. It was revealed that the girl was actually born male but trussed up in long hair and skirts as part of a [[PsychoPsychologist cold-blooded psych study]]. One twin murders the doctor who is responsible, but as the two suspects are impossible to differentiate from each other, it leaves the detectives at an impasse.
** And yet another episode featured a sicko kid who murdered a "friend" at his own birthday party, and liked to mutilate himself to scare other kids. When it was realized he wouldn't get charged as an adult, [[spoiler:the murdered boy's father shot him.]]
** There's also another episode which revolved around a harassed boy who gunned down members of the school's basketball team, then tried to commit suicide and missed then blamed an alter ego named "Zoltar" for it. He gets better though, as the unit gives him the opportunity to go to a mental hospital to cure his disorder.
** Another episode looks like it is playing this trope straight (kid comes to school and shoots another kid on the playground) but it is actually subverted (he was shooting at the gangsters behind the fence that have been threatening him).
** The episode "Born Psychopath" revolves around Henry, a manipulative ten-year-old boy who has homicidal tendencies whenever he doesn't get what he wants, to the point where [[spoiler: he locks his mother in the laundry room, ties his sister to a bed while nearly lighting his family's apartment on fire, ties a neighbor's kid to a chair in a closet, drowns his neighbor's dog, takes another child hostage inside a playroom, and shoots Amaro in the abdomen. Fortunately, Amaro was wearing a bulletproof vest.]]
* ''Series/MalcolmInTheMiddle'' has a few: Francis, the eldest, did several horrible things as a toddler, and ended up lighting his teddy bear on fire (and the fact that he poured lighter fluid on it implies that it was deliberate), and it is heavily implied that Francis' final action was the reason why Lois ended up having to become such a strict mother. Reese kicked his mother hard enough to force her to go into labor several hours before the scheduled time for labor and then kicked the doctor as he was born. Probably the worst offender was Jamie often frames his brothers for things he did, and when under the influence of soda, actually attempts to murder Lois by shoving a shelf onto her. Suffice to say, Francis and Reese really don't grow to become any saner into adulthood.
** Dewey of later seasons is a MagnificentBastard who uses his skills either when someone has wronged him (usually [[DisproportionateRetribution disproportionate]]) or [[ItAmusedMe when he's just bored.]]
* ''Series/{{Merlin 1998}}'': The first thing we see of Mordred is him, as a young toddler, picking up a knife and throwing it across the room at a guest. According to his mother, it's just his way of demanding attention.
* ''Series/MidsomerMurders'':
** One episode memorably featured ''three'' of these, the two girls distracting the victim before their older brother strangled him. At the end of the episode, Barnaby remembers their father died in a climbing accident, and only needs to look at the kids' expressions to see they started killing a lot earlier. Oh, and their mother is a ''[[TheCobblersChildrenHaveNoShoes psychiatrist.]]''
** Another had a kid use his mentally retarded uncle to murder people, the uncle drawing the line at killing the kid's aunt.
** Two separate episodes have young children killing other children (deliberately or by accident). Years later, the kid (who'd survived and been taken in by a couple [[ReplacementGoldfish grieving over their own child]]) or the kid's father (in the latter case, he was also the village priest) find out about it and wreak vengeance.
* The ''Series/{{Millennium}}'' episode "Monster" concerns a demonic lil' tyke who frames her daycare provider for abuse, then does the same to Frank when he investigates.
* ''Series/{{NCIS}}'': [[spoiler: In "Parental Guidance Suggested", a 12-year-old girl kills her mother, partially so her Navy SEAL father will stay home permanently (she had been injuring herself and her mother so he would come home due to family emergencies), and partially because her mother had figured out that she's TheSociopath and wanted to send her to a psychiatric hospital in Montana to help curb her violent tendencies. This nearly backfires when the father figures it out and is about to kill her when the team arrives, ironically because at the time they believed ''he's'' the killer. Further irony: her mother ''specializes'' in psychopathy and even consulted with a [[ImAHumanitarian cannibalistic serial killer]] she helped put away (or analyze after the fact) in order to confirm her suspicions.]]
* In the ''Series/NewAmsterdam2018'' episode "The Karman Line," Iggy has to deal with a young girl who tried to strangle her little brother to death all because he wouldn't let her play with his phone. It then turns out that the girl is a sociopath who is incapable of showing remorse.
* Parodied in ''Series/OnlyFoolsAndHorses'' -- Rodney is convinced that his nephew Damien ([[ShoutOut the name is not coincidental]]) is one of these, and acts as if he's with the Anti-Christ anytime he's in the same room as him. The boy's just a normal child, but try telling Rodney that.
** One particular scene highlights this; Damien wants to show off a conjuring trick he's learnt and chooses Rodney to show it to. From Damien's point of view, he's just happily playing with his uncle. Rodney, however, looks as if he's being forced to participate in some kind of satanic ritual.
* In ''Series/PowerRangersOperationOverdrive'' (made and taking place in 2007), Thrax, son of Rita and Zedd, spent a few days as TheManBehindTheMan in charge of that season's warring factions, and proved a villain powerful and skilled enough to disable the entire incumbent Ranger team. It was long assumed that he could only be in his teens, as he must have been born around the time a LovePotion-influenced Lord Zedd started talking about wanting kids, but no - WordOfGod says he was born between ''[[Series/PowerRangersZeo Zeo]]'' and ''[[Series/PowerRangersTurbo Turbo]]'' (that's the reason Zedd and Rita didn't take {{Big Bad}}hood back like the ''Zeo'' finale implied they would, they were raising him), making him ''just ten years old at the time.''
* A scene from ''Series/Reno911'' had Dangle come across the other officers shouting at a little boy in custody. Taking pity on the boy, Dangle lets him go, only for the other officers to return and tell him that the boy had killed his whole family and raped his little sister to death.
* ''Series/{{Smallville}}'':
** A side-effect to cloning a little girl happens to be the negation of any sense of right and wrong. Another side effect is SuperSpeed which makes Lana think she's a ghost.
** In season six, [[spoiler:Bizarro]] when he is in a young boy's body. You don't even get the luxury of a GoryDiscretionShot. Don't say we haven't warned you.
** In season ten: [[spoiler:"My name is Lex."]]
** [[CloningBlues Alexander]]. Given that he's a clone of ComicBook/LexLuthor, this shouldn't be surprising. [[spoiler: Luckily, he later makes a HeelFaceTurn and turns out to be ''Smallville'' Superboy.]]
* ''Series/StargateSG1'': Vala is impregnated with the DarkMessiah of the ScaryDogmaticAliens in season 9. While she does grow to maturity in a matter of days, she is an extremely creepy (and, you know, evil) child in her first episode.
* ''Series/{{Supernatural}}''
** Loves this trope, especially in early seasons. Enfant Terribles, usually ghosts, monsters posing as kids, or human kids who're just plain crazy, turn up in ''Dead in the Water'', ''The Benders'', ''Playthings'', ''All Hell Breaks Loose'', ''The Kids Are Alright'', ''Bedtime Stories'', and ''Family Remains''.
** Used as the twist of Season 1 and Season 5 episodes [[spoiler:''Provenance'' and ''The Real Ghostbusters'']], playing out pretty similarly. In the former, [[spoiler:a haunted family portrait killed anyone who owned it. The killer appeared to be the father, but he turned out to be trying to warn people of the real culprit: the spirit of the psychotic little girl who had killed the family in the portrait who'd adopted her, as well as her own biological family before that. The girl also died, but her spirit haunted the painting.]] In the latter episode, where the ghost killing people appeared to be [[spoiler:an orphanage caretaker who'd killed her young charges. After the Winchesters burn her bones and destroy her spirit, it's revealed that she had killed the kids because they had murdered her son and that in death, she'd been keeping the kids' spirits in check. With her gone, they're free to start killing again.]]
** Also used as the twist of Season 2 episode [[spoiler:''Playthings''. In an homage to ''Film/TheShining'', the audience sees two young girls who appear to be sisters playing together at the hotel their mom works at. The Winchesters suspect the recent deaths are caused by the grandmother, an infirm old woman who seems to be using magic. It turns out one of the little girls is actually the ghost of the grandmother's sister who died young, returned as the other little girl's NotSoImaginaryFriend when the grandmother became too feeble to keep up the magic keeping her dead sister away. The ghost is lonely and plans to kill her great-niece to keep as an eternal playmate.]]
** Season 3 introduced a recurring Enfant Terrible in the new BigBad, Lilith, the only demon in fourteen seasons and counting to be seen possessing little kids. Memorably, she possesses one little girl to spend the third season finale taking the girl's family hostage and making them spoil her like their beloved daughter as she terrorizes them, killing them if they don't play along; the terrified family doesn't know exactly what's happening, but do realize it's not really their daughter and [[spoiler:almost kill their daughter when she's no longer possessed, out of desperation]]. Lilith also plays up her hosts' youth to mess with people by acting sugary sweet and innocent while [[ColdBloodedTorture torturing a dozen unlucky folks to death]] [[GoryDiscretionShot offscreen]] and [[NeckSnap snapping grandpa necks]]. In this case, the Enfant Terrible portrayal is both [[JustifiedTrope justified]] and [[SubvertedTrope subverted]], as the actual little girls doing the butchering are innocent and forced to do it against their will thanks to DemonicPossession, and the demon herself is not a child at all, later revealed to be [[OlderThanTheyLook the first and oldest demon created thousands of years ago]]. Unfortunately for fans who liked the creep factor in this, Lilith does switch to an adult host in Season 4 in a probable case of RealLifeWritesThePlot to [[spoiler:avoid having the grown-ass adult Winchester men attack and painfully kill a cute little girl on the CW (since unless Lilith spontaneously grew a conscience and picked an unoccupied host body, the child she would be occupying would be forced to experience the death with her)]].
** Surprisingly subverted with Jack, [[spoiler:Lucifer's HalfHumanHybrid son born in the twelfth season finale]]. He was regarded as a FetusTerrible by most characters before his birth and flashed what seemed like a SlasherSmile at Sam, but grows to an adult appearance immediately after birth to subvert the "child" part of the trope (physically, anyway) and turns out to be a genuinely well-meaning and sweet kid to subvert the "evil" part.
* Lily from "A Child Is Crying", an episode of the early GenreAnthology ''Tales of Tomorrow'', is a young girl born so brilliant that she can anticipate future events and influence others' behavior. When she foresees a nuclear attack, she refuses to tell the military think-tank that's been exploiting her genius which country will be responsible, because revealing that information will only kick WorldWarIII off sooner.
* ''Series/TheTwilightZone1959'':
** From the episode "Literature/ItsAGoodLife": "No comment here, no comment at all. We only wanted to introduce you to one of our very special citizens, little Anthony Fremont, age 6, who lives in a village called Peaksville in a place that used to be Ohio. And if by some strange chance you should run across him, you had best think only good thoughts. Anything less than that is handled at your own risk because if you do meet Anthony you can be sure of one thing: you have entered ''The Twilight Zone''."
** In the original short story, he's only three, which means he's not so much evil as ''incapable'' of understanding that it's wrong to hurt others, the more so as nobody's ever had the nerve to tell him "no".
** The sequel episode gives us Anthony's daughter ''Audrey'', who seems better than he is (she openly admits to hating him when she sends her friend's father to the cornfield), but towards the end of the episode [[spoiler:quickly and remorselessly sends ''the entire rest of the population of the town'', even Anthony's mother, to the cornfield. Because they all thought bad thoughts about her and her father. "We don't need them, daddy! We don't need anyone!" But then she does bring everything back when he says he's lonely, so yeah.]] The episode ends with Anthony cowed by the knowledge that Audrey is even more powerful than him [[spoiler:since she can wish things to the cornfield ''and bring them back'' while he can only send them away.]]
** In "A Nice Place to Visit", Rocky had led a street gang while in grade school.
** In "[[Recap/TheTwilightZoneS5E148CaesarAndMe Caesar and Me]]", Susan is an evil little girl who takes delight in tormenting and insulting Jonathan West at every opportunity. After she overhears him arguing with Caesar about robbing the nightclub, she reports him to the police. Susan does so out of sheer vindictiveness as opposed to it being the right thing to do. When Caesar speaks in front of her, she plans to keep it to herself even though it could prove that Jonathan is perfectly sane. It takes very little effort on Caesar's part to convince Susan to run away with him. It is even implied that she will kill her aunt Agnes Cudahy in order to escape her.
* Lizzie from season four of ''Series/TheWalkingDead''. She actually believed that the walkers are people just like us and had a sick fantasy of being friends with them. She tries to prove this by murdering her little sister, believing that she'll be the same when she reanimates. She was also very close to killing baby Judith as well. Luckily, Carol and Tyreese stopped her before she could do it. Carol then believes that they were not safe around Lizzie and she had [[ShootTheDog no choice but to kill her]].
-->'''Carol:''' Just look at the flowers, Lizzie. *BANG!*
* ''Series/TheXFiles'':
** The [[CreepyTwins clone twins]] Teena and Cindy, in the episode "Eve".
** The show also gave us Charlie [[spoiler:and Michael]] from "The Calusari". [[spoiler: Michael is the ghost Charlie's twin brother, who died at birth, and is killing many of the people Charlie is close to since the mother never performed an exorcism.]]
[[/folder]]

[[folder:Literature]]
%%* Max and Moritz in Creator/WilhelmBusch's ''Literature/MaxAndMoritz''. They are completely amoral pranksters.
%%* The two children, Miles and Flora, in Henry James's ''Literature/{{The Turn of the Screw}}''. Although there is some speculation as to whether or not they really were Enfants Terrible or whether the narrator was insane...
%%* [[spoiler:Florence]] in ''Florence and Giles,'' John Harding's [[WholePlotReference version]] of ''The Turn of the Screw'', turns out to be very much this, given her habit of [[spoiler:murdering her governesses.]]
%%* Clark Fries in Creator/RobertAHeinlein's ''Literature/PodkayneOfMars''. [[spoiler:(Although he's on the way to reform at the end of the book.)]]
%%* ''Literature/ArtemisFowl'' combines this with VillainProtagonist and AntiVillain [[spoiler: until his HeelFaceTurn]].
%%* The titular Kevin from ''Film/WeNeedToTalkAboutKevin'' and the film based on it. He only gets worse as a teenager...
%%* The Career Tributes in ''Literature/TheHungerGames'', especially Clove. TheFilmOfTheBook takes this UpToEleven.
%%--> "Where's lover boy?"
* ''And the Ass Saw the Angel'' (a book written by Music/NickCave, whose musical career formerly provided the page quote - See Music, below) has the character of Beth. The UnreliableNarrator can't quite make up his mind whether she's actually a demonic witch or not.
* [[spoiler:Virginia]] in Alex Grecian's ''The Black Country'', who turns out to be the one responsible for murdering [[spoiler:her half-brother Oliver]]. The reveal results in [[spoiler:infanticide and suicide.]]
* Creator/RayBradbury:
** The murderous newborn in "Small Assassin".
** The [[CreepyChild disturbingly polite and sweet children]] in "Literature/TheVeldt", who murder their parents because they've threatened to cut off their holographic nursery. Bonus points for being named [[Literature/PeterPan Peter and Wendy]].
** "Zero Hour", in which ''every child in the world'' is convinced by an alien race to set things up to let them invade Earth and kill all of the adults. And they agree because they are promised later bedtimes, no baths, and all the TV they want. [[spoiler:And it ends with the main character's daughter leading a group of aliens straight to her parents while calling to them as she searches the house.]]
* Gwendolen Chant from Creator/DianaWynneJones's ''Literature/CharmedLife'' may look like a china doll, but she has a vindictive nature and mistreats her brother Cat.
* ''Literature/{{Confessions}}'': From observing other babies, Augustine deduces that he himself was as corrupt and self-centered as a child as he was in his adult life. He probably wailed and whirled his limbs around with as much force as possible, a behavior only tolerated because of how weak and pathetic his attempts at harm were.
* Josephine in Creator/AgathaChristie's ''Crooked House''. [[spoiler:She's responsible for a series of murders starting with her grandfather.]]
* Adore Loomis, the spoiled, precocious, mean-spirited brat in ''Literature/TheDayOfTheLocust''. He eventually takes it too far and [[spoiler:pays with his life for it.]]
* Mordred Deschain, The Little Red King, from ''Franchise/TheDarkTower'' series. At least two characters fall victim to this evil baby within hours of his birth.
* In ''Literature/TheDeathGateCycle'' has one whose role spans two books. Bane is the son of a mysteriarch, who had an EvilPlan to take over the human race in Arianus. He orchestrated this by switching the king and queen's legitimate child with his own son. The kid was kept safe from harm with sheer looks and eventually gets his comeuppance when [[spoiler: he tries to kill the king. His previous mother then strangles him with magic, in a sort of parallel to the fate of the king and queen's original son, who suffocated from lack of air in the higher reaches of Arianus.]]
* [[SpoiledBrat Her Thumbleness]] in ''[[Literature/{{Dragonback}} Dragon and Slave]]'' likes to select slaves to be entertained by, in various ways. Scaled ones get painted on or in one case carved. Others mostly get beat up.
* ''Literature/{{Dune}}'': Alia, who is also the CreepyChild poster girl. She is born fully aware, and [[spoiler: kills her grandfather at the age of two.]] And laughs. [[spoiler: In fairness, he was the BigBad.]]
* In the second Literature/{{Eisenhorn}} book, during the Thracian Atrocity, Eisenhorn comes across a child that he thought was in danger. Said child turned out to be an escaped Alpha-plus level psyker: it compels Eisenhorn to kill a Space Marine and nearly forces him to commit PsychicAssistedSuicide before being driven off.
* Peter Wiggin in Creator/OrsonScottCard's ''Literature/EndersGame'' liked to torture animals to death and physically and mentally torment his siblings.
%%* Some of the {{Designer Bab|ies}}y {{Sex Slave}}s in Miriam "Starhawk" Simos's ''The Fifth Sacred Thing''.
* In the Literature/FirebirdTrilogy, Phoena was a wasteling[[note]]third child, and thus required to commit suicide once her oldest sister had two children[[/note]] until the age of six when her sister Lintess died. Their sister Firebird privately suspected that Phoena had murdered Lintess, but could never prove it. Certainly, Phoena has always been "unswervingly selfish".
* This trope is {{deconstructed}} in ''Literature/FunnyBusiness''. As a toddler, [[spoiler:[[RealityWarper Jeannette]]]] was like this because toddlers don't comprehend that other people have feelings and can be hurt. Once she grows out of it, she suffers a massive HeroicBSOD which continues to the time of the main story.
* [[spoiler: Eppon]] in ''Literature/GalaxyOfFear'' is somewhere between this and GooGooGodlike [[spoiler: until he grows up within hours]]. He's cute and loving and kills people by absorbing them as soon as there's no one but the victim around to see, but seems to have a soft spot for Zak and Tash.
* Euphemia in ''My Godawful Life'', a parody of Misery Lit: a foul-mouthed girl genius who turned her former foster parents into spiders and who has driven many of her carers to suicide. She also hints that she fakes her Asperger's Syndrome in order to avoid being locked away, and may have murdered her father (a paedophile) and his friends.
* The Bernard Taylor novel ''The Godsend'' tells the story of an English family of six who takes in an [[DoorstopBaby abandoned baby]]. [[spoiler:As the little girl grows up, she murders the other children, one by one, so she can get all of the parents' attention. The father eventually figures out his adopted daughter is evil, but does not succeed in stopping her.]]
* Gaia in the ''Literature/{{Gone}}'' series, so very much. Within the ''four hours'' from her birth to the end of ''Fear'', she manages to torture Penny after she accidentally drops her and then laughs at the scene, laughs once more at seeing terrified children ''walk into a fire'' due to Penny's visions, and forces her mother to relive her horrible memories of eating Panda. And that's not all... She also attempts to kill both her own father, Caine, by trying to crush him against the FAYZ barrier and Sam, by trying to rip him apart via telekinesis, though she doesn't succeed in either case.
* Tara Webster, Michael's little sister from the Literature/{{Goosebumps}} book ''The Cuckoo Clock of Doom'' appears to gain a sadistic pleasure from making her brother's life difficult, and displays no redeeming qualities at all. It appears that she's ALWAYS been like this, to the point that she would make things difficult for her brother even when she could barely speak. [[spoiler:At the end of the book, it's hard to feel bad about Tara's existence being erased.]]
* Leck in ''Fire''/''Literature/{{Graceling}}''. Guess it comes with being able to [[spoiler:put thoughts into people's heads]]...but a lot of people are damaged or killed thanks to him.
* Rhys in ''[[Literature/TalesOfTheBranionRealm The Granite Shield]]'', by Fiona Patton, is a royal bastard touched by the Gods, with consequently very different priorities than the normal people around him. When he fights at a castle siege at age twelve, he nonchalantly talks his younger brother into climbing up the privy shaft together in the middle of the night, then sneaks into the kitchen and contaminates the commanders' goblets with a horrid disease. Within weeks, the siege is over. His brother later talks a fortress into surrendering by telling the harrowing story.
* Young Tom Riddle as seen in ''Literature/HarryPotterAndTheHalfBloodPrince'' is already convinced that he's [[{{Ubermensch}} special and different from everyone around him]], honing his magical skills by torturing other children and killing animals, and manipulating adults by [[DeliberatelyCuteChild putting on a polite and quiet act]] when he wants something. He was also a murderer at least twice over--and also a [[ImmortalityImmorality lich]]--by the time he grew up.
* ''Literature/{{Haunted}}'': [[spoiler:Brandon Whittier is a 13-year-old cursed with progeria, a disease which causes its victims to age at seven times the normal rate, becoming YoungerThanTheyLook. He tricks the female volunteers at the nursing home where he works into thinking he's eighteen, begging them not to let him die a virgin, and then threatening to report them for child molestation unless they give him ten thousand dollars.]]
* Acheri, from ''Literature/HellsChildren'', by Andrew Boland, is a little girl who sadistically kills many people through the course of the story.
* ''Literature/HereticalEdge'': Ammon, the main character's younger-half brother, is one seriously effed-up kid with a CompellingVoice and absolutely no regard for the lives of others. He's repeatedly described as adorable, contrasting sharply with his horrifying brutality.
* Pruitt in the Jane Rice short story [[http://www.unz.org/Pub/Unknown-1942jun-00090 "The Idol of the Flies"]], who is, among other things, [[spoiler: an animal torturer, a SelfMadeOrphan and a devil worshipper who totally deserved to be HoistByHisOwnPetard.]]
* The Literature/InDeath series: Ten-year-old [[spoiler: Rayleen Straffo]] is revealed to be this in ''Innocent in Death''. She is TheSociopath who killed her own baby brother (at the age of '''7'''), two male teachers, an old woman in a nursing home, and also tried to kill her own mother. There is no FreudianExcuse for this child.
* In ''[[Literature/{{Indigo}} Infanta]]'': A hopelessly cute, seemingly sweet and innocent [[spoiler:orphaned princess, raised to be the bride of a warlord and legitimize his claim on her rightful kingdom]]...who [[TwistEnding turns out]] to be the mortal avatar of a [[spoiler:sea demon called The Serpent who Devours]] and the actual BigBad of the book. Keep ''also'' in mind that the heroine [[RedHerring spends the entire book thinking]] that it's [[spoiler:the ''warlord'' who's the demon's avatar]]...and, as a result, is too late to stop this kid from [[spoiler:assuming her true form and eating him]].
* In ''Literature/ISitBehindTheEyes'', the real Emily is initially believed to be a typical {{Jerkass}}. [[spoiler: However, as part of a double-twist ending, it turns out that she is a ruthless, manipulative [[TheSociopath Psychopath]], who has no qualms over killing people she doesn't like. She spends almost the entirety of the story being possessed by an EldritchAbomination, who [[GrandTheftMe took over her body]] to stop her from succeeding in killing one of her classmates.]]
* The ''Literature/KharkanasTrilogy'' has three for the price of one: the triplets [[MeaningfulName Envy, Spite and Malice]]. They enjoy torturing their brother Arathan, including siccing a rabig dog on him or making him almost drown in an icy lake. Later, Envy and Spite murder Malice (who eventually [[UnexplainedRecovery gets better]]), but to cover up their deed, instead of hiding the corpse, they decide that the best course to take is to murder everyone else present within the keep as well. ''Then'' they discover that (almost) dying wakes some dormant powers within them, e.g. influencing people far away to do bad things...
* ''Literature/LordOfTheFlies'' is all about how a lack of immediate consequences for their actions brings out the worst in a group of castaway children.
* In the Creator/AndrewVachss Burke book ''Mask Market'', Burke found that [[spoiler:Beryl Preston]], one of the children he had been tasked with retrieving, turned out to have been playing both her parents and her "captor". In the present day, he finds out that, far from growing out of it, she has only gotten worse.
* Angel from ''Literature/MaximumRide'', who has a very innocent appearance.....but can read and ''influence'' minds, and can communicate with fish...but mostly sharks. She also tries to take over the flock from time to time.
* V.J. in Robin Cook's biotechnological thriller ''Mutation'' -- a boy whose superior intellect (and perhaps his angelic good looks as well) is the result of his father's genetic tinkering. He, however, has [[{{Anvilicious}} no sense of morality]], commits a series of high-tech murders, and uses underhand means to finance his own biotechological research.
* ''Literature/MythAdventures'': Markie, a toddler who makes life miserable for Skeeve and his associates. [[spoiler:Somewhat subverted in that she is actually The Ax, from a race of OlderThanTheyLook people. She was hired to ruin Skeeve's reputation.]]
* In ''Literature/{{Palimpsest}},'' people who can travel to Palimpsest in their dreams are marked with a tattoo of a region of the city somewhere on their body. One woman so marked had a baby after receiving her tattoo - and her baby was born ''covered'' in tattoos - not of Palimpsest, of someplace else - and minutes after birth he looked at his mother and said "''I want to go back.''" His mother had a sort of FreakOut and gave him up for adoption.
* ''Literature/{{Redwall}}'''s Veil Sixclaw. He's an AlwaysChaoticEvil ferret, who ends up being raised by the good mice. From the start he makes them suspicious, hence the name they choose for him. [[spoiler:It's an anagram of "evil" and "vile".]] His foster-mother Bryony puts it down to fear of CarnivoreConfusion and adores him, but by his teens, he's attempting to poison fellow Abbeydwellers. Some fans who see him as the {{Woobie}} forget that he continues this behaviour in his wanderings, committing highway robbery and murdering two foxes (who admittedly had captured him earlier). [[InTheBlood He apparently gets his psychotic tendencies and grudge-holding abilities from his father]]. What really mixes up this example is the fact that he [[spoiler: pulls a HeroicSacrifice to save Bryony at the end of the book.]] This has the effect of convincing Bryony that he really was evil in his heart all along [[MakesJustAsMuchSenseInContext (it doesn't make sense in context either)]].
* ''Literature/SecondApocalypse'': Anisurimbor Kelmomas is the son of Anisurimbor Kellhus, an ImpossibleGenius Dunyain. Kelmomas has inherited more of his father's Dunyain "strength" than he lets on, making him a ChildProdigy. He pretends to be an ordinary, sweet, doting eight-year-old, but in reality, he is a manipulative, psychotic and sadistic murderer who is obsessed with doing anything necessary to be showered in love by his unknowing mother.
* Amity Adora ("Amma") Crellin in Gillian Flynn's ''/Literature/SharpObjects''; charming, childlike, spoiled, vicious, manipulative, morbid, sexually precocious, and, incidentally, [[spoiler:a triple murderer]] by the age of thirteen.
* ''Literature/ASongOfIceAndFire''.
** The RoyallyScrewedUp Joffrey "Baratheon". King at the age of thirteen, his favourite activities include ordering executions, having men fight to the death, and shooting starving peasants with a crossbow for target practice. He also cut open a pregnant cat as a child and picks on his "weaker" brother.
** At age twelve Gregor Clegane burned off half of his younger brother Sandor's face when the latter dared to play with one of Gregor's toys, a toy that Gregor did not want anymore.
** There's also the [[LittleMissBadass nine-year-old]] [[SociopathicHero Arya Stark]], who is rapidly becoming one of these as she continues her [[BestServedCold revenge against everyone who has harmed her or her family]].
** [[spoiler: Varys's "little birds" don't just steal secrets. They also carry knives]].
** Cersei was arguably even ''worse'' than her son Joffrey in her youth -- for all she was a lot brighter when it came to covering her worst offences up successfully as, at most "just a mean, but cute, brat". Abusing her baby brother Tyrion, seducing her twin brother (Jaime), accusing a servant girl of theft and having her beaten so badly that she lost an eye, [[spoiler:murdering her best friend to keep her quiet about their visit to a fortune teller (and because said friend also fancied Jaime)]]...she did all this and more as a lass. What's worse is that she doesn't regret any of this as an adult. If anything, she's ''proud'' she was so "bold", so young. In light of this, it's no wonder Joffrey turned out the way he did with Cersei as his primary parental figure.
** Unsurprisingly occurs in House Frey, the poster House for BigScrewedUpFamily. Two of Walder Frey's young grandsons, "Big" Walder and "Little" Walder, who are only 52 days apart in age, embody this in different ways, both being bullies. However, Little Walder shows a nastier and more sadistic streak, taking part in the cruelties of the sadistic [[BastardBastard Ramsay Bolton]]. His cousin Big Walder, despite being very low in the line of succession (his father is Walder Frey's 13th son) makes it clear early on he intends to become Lord of the Crossing. [[spoiler:Its almost certain he murdered Little Walder, who was ahead of him in the line of succession, even though he was only 9.]] However he still comes across as sympathetic, considering what an AssholeVictim they were, and the fact Big Walder shows a more decent side in "A Dance with Dragons".
* Princess Violet from Literature/TheSwordOfTruth. A spoiled princess who orders to chop off heads a-la the Red Queen. [[spoiler: A few books later, she is taught to cast curses through magical drawings. Cut to a LittleMissBadass coming to visit; ''Well... Who's that on the drawing? Oh, that's right, it's me. (draws a few lines) Well, Violet, now it's you. Cut to SoundOnlyDeath'']].
* Jane and Alec from ''Literature/{{Twilight}}'': Despite their eternal childlike appearance, the twins are very feared and respected by every vampire who knows their rare psychic powers and evil personalities.
* The BigBad of the Literature/{{Tunnels}} series is one: [[spoiler:Rebecca Burrows, the protagonist's 12-year-old little sister.]]
* Eva Spencer of ''Literature/VoidDomain'' enters adolescence as a highly adept {{Blood Mag|ic}}e who thinks little of wandering down an alley and reducing any would-be muggers or assailants who follow her to raw materials. Running away from home as a young child and becoming the pupil of a MadScientist demonologist probably didn't help matters much.
* Creator/TadWilliams's ''Literature/TheWarOfTheFlowers'' just straight out calls it The Terrible Child. Everyone knows he's pure evil though. That was kind of the point of creating him in fact.
-->'''Lord Hellebore:''' That child is an abomination.\\
'''Remover of Inconvenient Obstacles:''' Then you have achieved your purpose, my lord.
* ''Literature/WarriorCats'': When Yellowfang first sees Brokenkit after his birth, she notices he seems angry and hate-filled already. At that moment she believes he'll be a danger to the forest (which he is as an adult).
* The protagonist of ''Literature/TheWaspFactory'' by Creator/IainBanks is a 16-year-old boy who has killed three children and numerous small animals, the children at a very young age.
* ''Literature/WingsOfFire'':
** Subverted with Clay. As a teenager, he doesn't feel particularly evil or violent, which confuses the others because of how he was as a hatchling. Right after hatching he attacked the other eggs and had to be torn away from them by force. However, it turns out he wasn't actually attacking them. This is normal [=MudWing=] behavior. The first-hatched egg (called a "[=BigWing=]") has a natural BigBrotherInstinct which causes them to help break their siblings out of their eggs.
** Peril was [[TykeBomb was raised]] as one. She has a FictionalDisability where she produces too much fire. Just touching her causes severe burns. So, an evil queen decided to raise Peril to kill others for blood sport.
[[/folder]]

[[folder:Films -- Live-Action]]
* ''Film/FullCircle'' includes Olivia, an adorable little girl who [[spoiler:used her psychic influence over other children to make them kill animals ritualistically and watch her murder a young boy.]]
* ''Film/CityOfGod'' features Lil' Zé, who cemented his position as a monster when he was still only a little kid, and casually walked into a brothel and gleefully killed everyone inside, [[ForTheEvulz just to satisfy his bloodlust]].
* The baby Nicholas in ''Film/TheDevilWithinHer'' is possessed by the spirit of a DepravedDwarf, and has tremendous strength and murderous intent.
* Damien from ''Film/{{The Omen|1976}}''. Your chances of being a decent kid aren't exactly great when you're [[TheAntichrist the antichrist]]...
* The kids from ''Film/{{Village of the Damned|1960}}''. A boy hits one of the kids with a basketball sort-of on accident. He later drowns.
* ''Film/TheBadSeed'', which was a 1956 theatrical film (in which the Enfant Terrible was named Rhoda) and a TV movie in 1985 (where she was named Rachel). She murders others (including another child), but people don't suspect a cute little girl of doing such things.
* Thelma from ''Film/LittleSweetheart'' definitely is this. Absolutely psychotic she will stalk, blackmail and murder to get her way, and she is only nine years old.
* Several classic horror movies are filled with them, including the Creator/StephenKing adaptation ''Film/{{Children of the Corn|1984}}'' and its sequels.
* In ''Film/TheGoodSon'', the murderous title character is a GenderFlip of ''Film/TheBadSeed''.
* ''Film/ItsAlive'' is about a malevolent baby. Within minutes of its own birth, it kills everyone in the room except mom.
* Creator/DavidCronenberg's ''Film/TheBrood'' has [[spoiler: a woman who has developed the ability to parthenogenetically give birth to mutant children who represent all her negative emotions, and exact bloody vengeance on anyone who has done her wrong, whether real or imagined.]]
* The unstoppable Paperboy from ''Film/BetterOffDead'' pursues Lane throughout the movie, demanding the two dollars Lane's family owes him. He also duplicates himself/recruits an army of identical helpers, and survives falls that should kill a human.
* The film ''Film/{{Orphan}}'' stars a serial-killing orphan[[spoiler: or so it would first appear. She's later found out to be an escaped 33-year-old Estonian mental patient with a pituitary disorder and a lot of makeup.]] It's a lot smarter than it sounds on paper.
* [[StringyHairedGhostGirl Samara]] in the remake of ''Film/TheRing'' was aged down from 40 or so in ''Film/{{Ringu}}'' to about 12. Oh, and she can drive you insane or kill you with her mind. Even after death.
* The title character in ''Film/{{Joshua}}'' was possibly one of these. But it is also possible that everything that happened was just happenstance and misunderstandings. In the final scene, [[spoiler: it is revealed that yes, he had arranged the destruction of his entire family, just so he could go live with his favorite uncle]]. He is shown to have dissected his hamster and possibly killed the other class pets, as well as demonstrating textbook psychopathic traits, so he definitely qualifies.
* The title character in ''Film/{{Mikey}}'' is one of these as he is a seemingly innocent child who is actually a psychopath who murders his foster families or anyone else who makes him really angry.
* ''Film/MenInBlack'' lampshades this in a scene involving a shooting gallery filled with aliens. While the other MIB applicants shoot at the aliens (who're actually just working out, sneezing, etc.), Will Smith's character shoots the lone civilian, an "...eight-year-old white girl, middle of the ghetto, bunch of monsters, this time of night with quantum physics books? She about to start some shit...".
* In ''Film/BloodyBirthday'' three children, Debbie, Curtis, and Steven have no consciences and murder anyone either because they feel like it or feel they have wronged them; it was foretold in the movie that anyone born during an eclipse would cause them to behave that way.
* In ''Film/{{Halloween|1978}}'' (1978), Michael Myers is six years old at the time of his first murder. Even more so in [[Film/Halloween2007 the remake]], with Deborah finding the notion of Michael killing animals unbelievable. Until he graduates to people.
* While not cute per se, Winchell in ''Film/{{North}}'' certainly is terrible, a SmugSnake really. This preteen school newspaper editor encourages the hero's search for new parents and publicizes it. While North's out searching, Winchell spearheads a powerful movement to make all parents subservient to their children. When he realizes that North choosing to return to his real parents would spoil things, he tricks North into thinking they no longer love him -- then ''sends assassins (adults) out to kill him''.
* In ''Film/WhoCanKillAChild'', children on an island of the coast of Spain for no particular reason start murdering all the adults until only they remain and they go off to recruit other children for their killing spree. The only explanation for their psychotic behavior was that one of the initial survivors claimed that a virus that only affected the children may be causing them to act like that. The same holds true for the remake, ''Film/ComeOutAndPlay''.
* Jody Mitchell from ''Daddy's Girl'' is a psychopathic little girl who kills anyone who gets in the way of separating her from her beloved father.
* Claudia from ''Film/InterviewWithTheVampire'' is a little girl who was turned into a vampire by Lestat to give Louis a surrogate child. Upon becoming a vampire, she is a blood-thirsty murderous child who lures people to her by pretending to be lost so she can kill and feed off them.
* Parodied in ''Film/{{Mafia}}'' with Chucky, a psychotic little boy who is a parody of Chucky from ''Film/ChildsPlay''; he murders his grandfather with bug spray so that he can steal his wallet and his father can become the new godfather, he is later seen torturing animals and stabbing dolls, and he gets his comeuppance when he receives a package of tiny dinosaurs which eat him alive.
* ''The Children'' semi-combines this with ZombieApocalypse, as an unknown sickness affecting only children turns them into murderous sociopaths who are very good at faking innocence. [[spoiler: Then it turns out teens are affected too; it just takes them longer to turn...]]
* The main character of ''Literature/TheTinDrum'' is more of a sociopath than a psychopath but he's still terrible nonetheless.
* At the end of ''Film/{{Identity}}'', [[spoiler:Timmy York]] turns out to be the one who committed all of the murders at the motel and [[spoiler:kills his mom in her deathbed]].
* Poked fun at throughout ''Film/SonOfTheMask''. Alvey isn't an evil baby, but he just feels that his own father doesn't care about him, so he uses his RealityWarping abilities to attempt to drive him insane.
* Played for comedy in ''Film/ProblemChild''. Junior and later Trixie, his arch-rival [[spoiler:and later best friend and stepsister.]]
* ''Soccer Dog: the Movie'' is a pretty typical forgettable '90s kids movie about a dog who plays soccer. That is except for one character, one of the teammates, Sonny, who is evil to the core. He's basically a stereotypical Italian mobster, only nine years old. He poisons his teammates, threatens to kill the main character's dog, and even punches the coach in the balls at the end of the movie. He's totally out of place and doesn't fit the tone of the rest of the film at all, and yet Lloyd from ''Series/MalcolmInTheMiddle'' quoting Robert De Niro movies is probably the only thing anybody remembers from this snoozefest.
* ''Film/TwelveTwelveTwelve'' has Sebastian, a murderous [[spoiler:demonic]] newborn.
* ''Film/ThirteenThirteenThirteen'' features a few killer children, including one in the opening scene who killed her mother and appeared covered in blood, and Kendra, the protagonist's daughter, who propositions her father's friend, then kills him violently.
* The main character of the B-movie ''The Pit'' (1981) who feeds his tormentors to a bunch of little creatures called the Troggs (no, not the old British rock band).
* ''Film/GoreOrphanage'' features [[spoiler:Nellie]] who is the reason why children in the orphanage keep dropping dead.
* Lock, Shock, and Barrel from ''WesternAnimation/TheNightmareBeforeChristmas'' look like trick or treating kids, but are among the most malevolent residents of Halloween Town. The only reason they don't kill Santa Claus instead of capturing him as ordered is that they're afraid Jack will punish them for [[LudicrousGibs losing parts of him in the process]].
* ''Film/BetterWatchOut'' has [[spoiler:Luke]] who tries to seduce his teenage babysitter, [[spoiler: stages a home invasion and holds her hostage]] when she turns him down. He's not even above [[spoiler:murdering his own best friend when he tries to free her.]]
* The protagonists of ''Film/TragedyGirls'' give the phrase "TeensAreMonsters" a new meaning, but [[spoiler:it's revealed they were ''always'' like this. They committed murder for the first time in ''grade school'']].
* ''Film/DustDevil'': One of the Dust Devils is possessing the body of a young child, who seems a little too efficient with his shooting.
* ''Film/TheGravedancers'': Dennis was preteen PyroManiac who burned down his father's business, and started the house fire that killed his entire family (and himself). He returns as an UndeadChild with [[PlayingWithFire pyrokinetic powers]] to haunt Sid.
* The main antagonists of ''Film/{{Hellions}}'' are a horde of beings that resemble trick-or-treaters and want a pregnant teen's baby.
* In ''Film/RelativeFear'', the newborn Adam suddenly lashes out and scratches his mother's face for no apparent reason.
[[/folder]]

[[folder:Anime & Manga]]
* Every kid in ''Manga/HunterXHunter'' who isn't Gon. The Zoldyck family is made up mostly of child assassins.
* ''Manga/BlackButler'':
** Cute little Ciel, only 12, has made a contract with a devil to slay his enemies. He even shot a pedophile in the face with his own gun and then had his butler kill everyone in the mansion, even though he was ordered to rescue them.
** Even worse than Ciel is anime-only character [[MoodSwinger Alois]] [[DepravedHomosexual Trancy]], who seems around the same age as Ciel and acts doubly as bloodthirsty; his introductory episode has him gouging out the eye of a maid, ''with his fingers'', in a sudden bout of fury that she ''looked'' at him, for one thing...
* ''Manga/AttackOnTitan'':
** Eren is a heroic version. At the tender age of nine, he tracked down a gang of murderers that had kidnapped a girl (Mikasa) and proceeded to lure them in with fake tears. When the first man got down to comfort him, he stabbed the man in the throat with a knife. The second fared much worse, getting stabbed with an improvised spear, knocked to the ground, and stabbed over and over again while Eren screamed at him. When questioned about his actions, he calmly stated the criminals were simply animals that happened to look like people. His actions were ruled justified, but the officers investigating were visibly frightened by what a nine-year-old boy had done.
** A Justified case exists with [[spoiler: the Colossal Titan]]. An 11-year-old was responsible for all that death and suffering, though years later they express [[TearsOfRemorse remorse]] for their actions, with it implied they didn't fully understand their actions at the time.
* The titular ''Manga/{{Monster}}'', Johan Liebert, murdered many people as a child, [[SelfMadeOrphan including several sets of adoptive parents]].
* ''Manga/ElfenLied'' is about a race of superpowered psychotic little mutant girls called the Diclonius. The greatest danger comes from them developing tremendous telekinetic powers at an age when they don't yet fully comprehend hurting other people and accidentally kill their families, but most that could be captured alive become highly aggressive and violent in response to the treatment they get from the people experimenting on them. And then there's Mariko, a five-year-old girl who is so powerful that she grew up inside a sealed vault and fed by tubes her whole life and unsurprisingly became completely insane. The only thing that can keep her in line are [[ExplosiveLeash explosive implants]] all over her body that can be triggered remotely at any time and also require a remote confirmation code every 30 minutes or explode automatically.
* The little girl assassins in ''Manga/GunslingerGirl'' may also be viewed as Enfants Terribles, although they have been specifically ''{{brainwashed}} and manipulated'' into being that way.
* ''Anime/{{Noir}}'' is a case where the Enfant Terrible gets a bit better, more or less.
* Wen from the ''Anime/CowboyBebop'' episode "Sympathy for the Devil" is a killer who stopped aging in his childhood after exposure to GreenRocks.
* ''Anime/ExcelSaga'' has an example of this: [[https://static.tvtropes.org/pmwiki/pub/images/kerai/1109068744777.jpg Cosette]] from the episode "Increase Ratings Week" is an eight-year-old assassin.
* Cynthia from ''Anime/OvermanKingGainer'' is a perfect example of this. She's an elite soldier working for her foster father, who enjoys killing and likens it to a game - except she knows she's actually committing horrible crimes. However, her father legitimately loves her and is proud of her for her deeds, so she might just be the perfect soldier.
* ''Manga/{{Bleach}}'': In her early appearances, the anime-exclusive character Ririn used the trope for her facade. During one of the fights, despite everything she had brought down on them, both Ichigo and Renji make note of how hard it is to fight brats and instead opt to attack her two minions.
* Masato from ''Manga/MermaidSaga'' who is an adorable little child who happens to be an 800-year-old sociopath known for poisoning women with mermaid's flesh in hopes for the MillionToOneChance (an actual one, not the type that occurs nine times out of ten) that it might make her immortal instead. The "lucky" one who doesn't die an agonizing death doesn't have it much better either, as he tends to punish them by repeatedly killing them.
* Michio Yuki of ''Manga/{{MW}}'' converts from [[UsedToBeASweetKid a sweet, adorable kid]] to this. It happens to him because of being exposed to the titular PsychoSerum.
* ''Manga/JoJosBizarreAdventure'':
** Dio as a child killed his father (who was abusive, but still), got adopted into the rich family of the main character, made said main guy look like a bitch for all of his early childhood years, kissed the girl that the main guy liked (against her will to top it off), burned his dog in an oven, and beat him up in a boxing match. And this is all before he becomes a vampire and causes trouble for three of the main character's descendents. His primary motivation for the vampirism? The main guy beat him for having kissed his girl, so he decided to get back at him in the worst way possible. When Dio tries to use his abusive father as an excuse for his behavior, Speedwagon shoots it down and states outright that no matter what he says to justify his actions, it changes nothing; he's evil and has been since the day he was born.
** In Part 3, the user of the Stand Death 13 is a remarkably intelligent and sadistic baby. Whenever his victims fall asleep, Death 13 pulls them into a dream of an amusement park and kills them; [[YourMindMakesItReal his Stand makes it real]]. Should they escape, they have no memories of the dream. [[spoiler:Kakyoin manages to cut a warning into his arm, but is unable to convince the others. Fortunately, he figures out how to bring his own Stand into the dream...]]
* Hansel and Gretel of ''Manga/BlackLagoon'' play this archetype well past the hilt with their childish fits of pique-turned-bloodbaths, shared multiple personalities, laundry list of psychosexual disorders, and cutely-adorned heavy machinegun. They aren't supernatural, their immunity to recoil forces aside, but they are very, very messed-up. [[spoiler:Justified, [[InterplayOfSexAndViolence due]] [[HarmfulToMinors to]] [[SnuffFilm their traumatizing]] {{freudian excuse}}s [[DarkAndTroubledPast of a past.]]]]
* Saffron, Ranma's final foe in ''Manga/RanmaOneHalf'', first appears as a very nasty child with a chip on his shoulder and a kingdom of powerful, flying soldiers at his beck and call. He later [[OneWingedAngel acquires his true, mature form]] and proceeds to devastate half the countryside.
* Narrowly averted with Tokito of ''Manga/SamuraiDeeperKyo'', who is referred to as sadistic by one of the characters (who isn't a very nice guy himself, when it comes down to it) and has a lot of onscreen fun torturing people, both psychologically and physically. Eventually, though, she is [[DefeatMeansFriendship redeemed]].
* Vino from ''Manga/ZatchBell'' is an INFANT whose demon partner is more or less Hitler mixed with Satan. And he enjoys watching him destroy the world. After his demon partner is killed one of the main characters adopts him because he's still just a baby.
* [[spoiler:Alyssa Searrs]] from ''Anime/MaiHime''. Sure, she's huggably cute, but you'll soon forget about all that when you realize that she can call an army of tanks to your doorstep...and she's not afraid to order to shoot to kill. Just don't look up at [[KillSat that metallic thing floating high above the ground]].
* The Fifth diary holder, Reisuke Houjou in ''Manga/FutureDiary'', is one of these, being an adorable four-year-old who uses his magic picture diary to adorably kill people (i.e., asks a girl to take a bath with him, and [[ElectrifiedBathtub then tries to electrocute her]]). He has a FreudianExcuse that his parents didn't love him enough (they never "slept like a river", next to each other with him in between) [[spoiler: due to the influence of the Omekata cult]]. Well, that and ''God is telling him to kill people''. No, not as in he's HearingVoices that he attributes to God, but as in ''[[GodIsEvil God exists, and he's telling a four-year-old to kill people]]''. And he tells that to other people, too. Because he's THAT much of a prick.
* ''Manga/{{Naruto}}'':
** As a small and relatively cute child, Gaara reacted to another child's rejection by trying to kill her. Hard to blame him, though, after all the MindScrew-ings his family gave him.
** Zabuza while a young child, and without any shinobi training, killed a hundred ninja students on his own. The village made him a ninja and promptly changed the rules to prevent something like that happening again.
* [[spoiler: Desil Galette]] from ''Anime/MobileSuitGundamAGE'' takes this trope UpToEleven. While he's only seven years old, he's done more than his fair share of heinous acts.
* Mokuba Kaiba comes disturbingly close to this at the beginning of the ''Manga/YuGiOh'' manga (when he's still [[spoiler:trying to kill Yugi]]), but he gets better afterwards. Seto Kaiba around the same age (flashbacks) might have been even more dangerous. He still is.
** In the parody ''WebVideo/YuGiOhTheAbridgedSeries'', [[https://www.youtube.com/watch?v=bTbCHDh9pb0 Rebecca Hawkins's teddy bear.]]
** Noah Kaiba from the Virtual Nightmare FillerArc is Seto and Mokuba's adoptive brother. Seriously injured just prior to their adoption, Noah's mind was placed in a virtual environment that preserved his conciousness but at the cost of permanently stunting his emotional growth. Despite being in his late teens or early twenties, he still appears as a child within the virtual world and acts like one as well.
* Despite not having a humanoid form, ''Anime/GhostInTheShellStandAloneComplex'''s Tachikomas evoke this at times, speaking with cute, childlike voices and behaving in cute, childlike ways just before cheerfully shredding a whole platoon of infantry with a Gatling gun.
* ''Franchise/FullmetalAlchemist'':
** [[spoiler:In the [[Manga/FullmetalAlchemist manga]], Pride, although he looks like a sweet little boy, is actually a [[Really700YearsOld 300-year-old homunculus]]. Not many kids out there can fill a dark room with working mouths and eyes.]]
** In the [[Anime/FullmetalAlchemist 2003 anime version]], there was Wrath after being corrupted by Envy and remembering his past, but after a while [[spoiler:his mother Izumi made him a better person]].
* Ralph from ''Anime/GlassFleet'' may be adorable and loving most of the time, but he won't hesitate to attack and try to kill you if you get on his bad side.
* [[IllGirl Himeko]] from ''Manga/ShinigamiTrilogy'' is [[WesternAnimation/TheGrimAdventuresOfBillyAndMandy Mandy]] with the ability to be [[DeliberatelyCuteChild deceptively adorable]]. In fact, she looks suspiciously like a certain [[http://bleedman.deviantart.com/art/Grim-tales-cast-25215099 DeviantArtist's version]] of Mandy, and combined with her [[LoveMakesYouDumb grim reaper suitor]] they look like Mandy's [[BrotherSisterIncest children]] Mini-Mandy and Grimm Jr.
%%* [[spoiler:"Gozen"/Hikaru]] from ''Manga/ShugoChara''.
* ''LightNovel/{{Baccano}}'' (see trope quote 2) has someone who (probably due to horrible torment and constant fear) turned into one. Though it might be just an overcautious kind of self-preservation.
* Although he may be a bit too old to count 16-year-old Hajime Muroto from ''Manga/{{Gantz}}'' certainly displays the traits; he plays it out like he's a very innocent and sensitive boy, but as it turns out he's a dangerous psychopathic serial killer and rapist.
* Kouganei Hana from ''Manga/KarakuridoujiUltimo''. A cute little tyke, when she isn't [[SlasherSmile smiling like a lunatic]] and ordering her [[HumongousMecha giant killer robot]] to murder everything in sight.
* Isaac, the prepubescent mass-murderer from ''Manga/EternalSabbath''. In his defense, however, he has a FreudianExcuse: [[spoiler:He is a clone, created for the specific purpose of having a spare to dissect as soon as he reached maturity.]] He was [[PeopleJars raised in a vat]] to keep him from developing consciousness, but being telepathic, he has known of his intended purpose since infancy and has consequently developed a rather poor opinion of human morality.
* Jellal from ''Manga/FairyTail''. While he's an adult at the start of the story, he convinced everyone to ''be his slaves'' as a child because they thought he was a sweet, morally righteous kid. [[spoiler:Justified because no one knew that Jellal himself was [[BrainwashedAndCrazy possessed]].]]
* ''Anime/CodeGeass'':
** Subverted with V.V.: even though he looks like a little kid, he is really in his late 50s to early 60s and has a code for immortality.
** Played straight with [[spoiler:Rolo]]. The kid is an assassin, who's been killing people since he was ''a small child.'' Nobody would suspect a six-year-old to shoot someone, but it helps that he can [[spoiler:stop people's perception of time]].
* Ginger Bread of ''Manga/KatekyoHitmanReborn''. Except that he's actually a doll, that's being controlled. Lambo, or the Arcobaleno babies would fit better, even though they were adults transformed into babies.
* ''Anime/DragonBallZ'': The purest form of Majin Buu was Kid Buu, a child-like form of Buu completely lacking any sense of morality or moderation. Essentially, his first act on being cleansed of those features absorbed from past victims was to [[EarthShatteringKaboom blow up Earth]] ''while still on it'', reform himself, and start blowing up other planets while trying to find Goku and Vegeta.
* Young Knives from ''Manga/{{Trigun}}'' simultaneously murders and breaks up the crew of the ship who adopted him and Vash, and in the end, he leaves everyone including Vash's beloved mother figure to die on the ship after he causes it to blow up.
* The Digimon Emperor [[spoiler: alias Ken Ichijouji]] from ''Anime/DigimonAdventure02'' has elements of this, but a lot of that is because he simply doesn't realize that the Digital World is NotAGame [[spoiler: until he is defeated and then his Digimon partner dies]]. Just watch his childlike glee when he creates the Dark Spiral and Chimeramon.
* ''Manga/RurouniKenshin'' has Soujiro and young!Enishi. The former's a StepfordSmiler serving a SocialDarwinist, the latter is a {{Yandere}} who severely [[LackOfEmpathy lacks empathy]], and both can cut people down into hamburger.
* ''Manga/MedakaBox'' has Unzen Myorii, the first BigBad after the GenreShift. He's a [[ChildProdigy ten-year-old]] cute little boy who's EstablishingCharacterMoment is him breaking the Orchestra Club leader's arm, and then massacring the entire club [[DisproportionateRetribution for being too loud.]]
* ''VideoGame/{{Medabots}}'' has the [[https://www.youtube.com/watch?v=VUdHFaLlw1I Ankle Biters]], whose Medabot, [[KillerTeddyBear Churlybear]], is a deceptively powerful GravityMaster. Though they don't exactly kill anybody, they are ''nasty'' pieces of work, though granted, Spyke [[AssholeVictim kinda had it coming]].
* Stella Irvine in ''Manga/MagicalRecordLyricalNanohaForce''. Sure, she is a CuteMute, but [[spoiler:after she merges with Esquad Huckebein...]]
* Kaitei Kubilah from ''Manga/LegendOfHeavenlySphereShurato''. He's the youngest follower of [[spoiler:Queen Shiva]], and a ''really fucking creepy'' teenage boy with [[PlayingwithFire pyrokinetic powers]].
* ''Manga/{{Loveless}}'' has Natsuo and Youji Sagan, child soldiers genetically engineered not to feel pain. Their first appearance has them killing two people and a dog, and nailing Soubi's hand to the ground just to see how he reacts. They do get better, though.
* Wadatsumi in ''Manga/SaintSeiyaEpisodeGA'', is as rude and violent as she is cute.
* ''Anime/TheVisionOfEscaflowne'' has Dilandau: a psychotic, murderous SpoiledBrat who at the "tender" age of 14/15, revels in killing and blowing up things. Then it's revealed that he's [[spoiler: Allen's younger ''sister'' Selena, who was kidnapped as a little girl and then experimented on horribly and ended up BrainwashedAndCrazy by TheEmpire.]].
* ''Anime/FatePrototype'' has Manaka Sajyou, an adorable-looking 13-year-old ChildProdigy who's also an OmnicidalManiac who, having been connected to [[AkashicRecords The Root]] since birth, has a total lack of empathy and a ''terrifying'' quantity of power. [[spoiler: Manaka was so innocently evil that she sacrificed her father and many local girls to the Holy Grail, dancing and sincerely thinking that it was what she had to do to raise the Beast and only being stabbed to death by her own Servant when she attacked her little sister Ayaka while telling her "I love you" managed to stop her... until she was revived several years later.]]
* ''Manga/OnePiece'':
** [[spoiler:Donquixote Doflamingo]] was a massive CreepyChild in his DarkAndTroubledPast, graduating into this when [[spoiler: he kills his father at age 10 as "punishment" for ruining the Donquixote family's lives.]]
** [[spoiler: Doflamingo]]'s henchman Sugar is physically and emotionally a child, having stopped aging at age ten due to her Devil Fruit, but [[FaceOfAnAngelMindOfADemon she's as cruel and sadistic as her boss is.]]
** Sugar's colleague Dellinger was one of these too. He is a human-fishman hybrid, and the fish part is derived from the fighting fish. This gives Dellinger incredibly nasty violent streaks, such that he was considered an equal to his crewmates at the age of 2. By the present, he is 16 years old and is mowing down expert fighters decades older than he is largely to humiliate them.
** [[spoiler:Charlotte Pudding]] did ''not'' start as such, [[spoiler:but when [[WoobieDestroyerOfWorlds she snapped after having been harshly abused]]]], she became this with gusto.
** Her mother, Charlotte Linlin, better known as Big Mom, had already some creepy tendencies when she was five years old, trying to "correct" the bodies of people of different races because they looked funny and she didn't know any better, but she didn't have bad intention to do so. However, [[spoiler:once the Giants start to fast for 12 days, Linlin couldn't bear it, and the delicious Semra she ate prior to the fasting made her addicted to it, which causes her to go on a rampage at the seventh day and she destroyed her village]]. This was probably the starting point with her extreme obsession for sweets.
** [[spoiler: Sanji's brothers, Ichiji, Niji, and Yonji,]] were genetically engineered to be [[TheSociopath sociopathic]] [[SuperSoldier Super Soldiers]], so this is kind of a given. [[spoiler: Sanji himself]] only escaped this via his mother's HeroicSacrifice.
* ''Manga/TokyoGhoul'' plays with this in multiple directions.
** Ghoul children are ''rumored'' to be like this, as a way for the CCG to justify killing them. But the majority completely invert this, being normal children until life forces them to become violent to survive.
** The Oggai, a 100-strong force of ChildSoldiers. Their youth and angelic faces contrast heavily with their capacity for extreme violence and brutal efficiency in wiping out anything in their path. They are introduced performing a public execution and like to show off the heads of their victims when given the chance.
* The ''LightNovel/SagaOfTanyaTheEvil'' has the titular character and {{Child Soldier|s}} herself, who at around the age ''ten years old'', has already established herself as a disturbingly brilliant, [[ManipulativeBastard manipulative]], and ruthless leader, who has earned the fear and respect of her mostly full grown male battalion, (It probably also helps, that she is a naturally gifted mage.), and is also ''completely'' morally bankrupt to the point of bordering on TheSociopath. Justified in this case, as [[ItMakesSenseInContext she was originally a grown and very cynical man, who was reincarnated as a little girl for talking back to a god]] and essentially has the brain of a full grown adult.
* In ''LightNovel/DanjonNoMaouWaSaijaku'', TheProtagonist is one, albeit usually a kind and gentle soul if he doesn't have reason to believe he's being threatened. Though he is technically "0 years old", he was "born" with the body and mindset of a preteen. This does nothing to stop him from coming up with truly brutal and sadistic dungeon designs, or even being in any way squeamish about walking up to the body of someone his top aid has bashed to death right in front of him, hacking the guy's head off with a shotel, and then presenting said head to the visiting dignitary of yet another nation that is trying to enter into a peaceful relationship with him, or at least not provoke him, and does it all with a genuine smile.
* In ''Anime/{{Tamagotchi}}'', Spacytchi and his brothers Akaspetchi and Pipospetchi are all young Tamagotchis who attend school. They're a TerribleTrio who do whatever they can to eventually take over Tamagotchi Planet.
* ''Manga/MajinTanteiNougamiNeuro'': After he was born, [[BigBad Sicks]]' father handed him a razor to gauge his potential. Sicks used it to slash the throats of all the babies in the Maternity Ward. He killed his mother when he was 2 years old and his father when 4 years old. By the time of the series takes place, Sicks is the CEO of an international arms manufacturer... And '[[MadeOfEvil Absolute Evil]]' as far as the entire cast is concerned.
[[/folder]]

[[folder:Comic Books]]
* Malice Vundabarr of ComicBook/{{Darkseid}}'s Female Furies in Franchise/TheDCU.
* In the comic book ''[[ComicBook/LEGIONDCComics L.E.G.I.O.N. '94]]'' (the "modern-day" version of the ''ComicBook/{{Legion Of Super-Heroes}}''), the superintelligent Lyrl Dox took control of the intergalactic police force L.E.G.I.O.N. from his father, Vril Dox (the son of Brainiac), brainwashed all but a handful of the force's members, and turned it into a fascist organization that nearly took over the universe. All of this before his second birthday.
* Calvin, from ''ComicStrip/CalvinAndHobbes'' fits most of the requirements, but he doesn't get away with it.
* Jenifer, a teenage girl from a ''Creepy'' [[http://11oclockcomics.com/2017/02/14/house-of-horror-2-jenifer/ story]] by Bruce Jones (and drawn by Creator/BerniWrightson). Though [[ButterFace grotesquely deformed]] and mute, she's got some sort of preternatural power that she uses to seduce men and rob them of their logic, driving all their friends and family away and then ''raping'' them repeatedly, [[spoiler:before forcing them to take her out in the woods and poise to kill her, paralyzing them just as another man comes along to save her [[HereWeGoAgain and start the process all over]].]] (Try [=YouTubing=] [[http://en.wikipedia.org/wiki/File:Masters_of_horror_episode_jenifer_DVD_cover_art.jpg the TV version]], as well-- there's some pretty sick stuff there.)
** Though said [[Series/MastersOfHorror TV version]] plays her somewhat more morally ambiguous. Rather like a wild animal actually.
* Oliver AKA Kid Omni-Man from ''ComicBook/{{Invincible}}'' - imagine an evil, ten-year-old Superman with super-intelligence slowly going more and more insane while everyone around him [[IdiotBall ignores all the obvious signs.]]
** And that's not [[spoiler: signs like lurking creepily in rooms or asking "Don't you want to play with me, Mother? We can play such wonderful games" It's signs like killing people with his bare hands without a shred of remorse in front of everyone.]]
** As of now, it appears that [[spoiler:this was a subversion, Oliver is very much one of the good guys]]. Probably.
* ComicBook/{{X 23}} of the ComicBook/XMen. She is Wolverine's clone and was raised from birth by a GovernmentConspiracy to be a killing machine through TrainingFromHell that descended into outright physical and emotional abuse, and often is able to carry out missions because she is so cute that no one suspects her. She even duped ''ComicBook/CaptainAmerica'' after her "field test" by masquerading as [[WoundedGazelleGambit victim of a massacre she herself perpetrated]]. However, Laura is also ''not'' a straight example: She constantly fights against her upbringing and desperately [[IAmNotAGun wants to be more than just a weapon]].
* Same goes for the Cassandra Cain [[ComicBook/{{Batgirl 2000}} Batgirl]], minus the government. She was raised from birth to be the world's best assassin, to the point where her father never spoke to her so that she'd only be able to understand body language, and actually ''shot at her''. But, after her first kill, she read the body language of someone dying and realised how horrible it is, and thus ran away from home, drifting until she found herself in Gotham City.
* Similar to Cass, Batman's son Damian Wayne. Raised to be an assassin by his mom Talia, he has a major case of RaisedByWolves.
* In ''ComicBook/EarthX'', the new Red Skull is a 12-year-old blond boy named Benny Beckley with mind control powers. Aside from attempted world conquest, his crimes include killing Doc Samson (by forcing him to tear himself apart), his aunt, Norman Osborn, and others.
** By the time he actually starts taking over the planet, he seems to be about 16 or 17, at least. [[spoiler: Killing him]] still nearly gives Captain America a HeroicBSOD.
* The ComicBook/FantasticFour actually fought a villain ''named'' Enfant Terrible. Turns out it was just a misunderstood alien child. It almost destroyed Earth by pulling the sun closer to it simply because it found this glowing ball in the sky fascinating, for one.
* ''{{ComicBook/BPRD}} 1946'' has a demon that stayed on Earth in the guise of a little Russian girl.
* Ashley in ''ComicBook/HackSlash''. Beat his own brother to death with a toy truck for playing with it, and was smothered to death by his outraged mother with a teddy bear. Survived as a vengeful ghost [[YourWorstNightmare murdering other children in their dreams]]. Then ended up [[spoiler: possessing the teddy bear...]]
* [[ComicBook/KlarionTheWitchBoy Klarion (bum..bum..BUM!) The Witch Boy]].
* [[http://starwars.wikia.com/wiki/Harrandatha_Estillo Prince Harrandatha Estillo]] from the ''ComicBook/XWingRogueSquadron'' comics. He's RoyallyScrewedUp.
--> "All those years of dipping from the same genetic pool caused a wrinkle, a flaw in an otherwise normal family line. We set out to keep ourselves above the common man and found ourselves with a thing from the deepest pit of the Sith."
* ''I Luv Halloween'' - Moochie, oh my dear motherf* cking god, Moochie!! She takes enfant terrible and ups it up to eleven (probably twelve)! She kills an obnoxious teenage couple and a young boy by bashing their heads in with a bra-slingshot, mutilates an unfortunate doctor (by applying him with electric shocks and stabbing scalpels into his thighs), pulls out teeth from dead and living alike (she was dressed as the tooth fairy), and her mile-wide pet cemetery implies no animal ever lasts more than five minutes in her care. She's also accompanied in her murderous hijinks by Spike, who is more of a creepy child than enfante terrible. All of this is for comedy.
** The main cast is nearly made of enfante terrible. In one volume, after being taken in by a Christian couple, whose fear for Finch and Mr. Kitty's safety is misguidedly justified due to being in the midst of a zombie apocalypse (the kids themselves don't care what's going on as long as there's candy), they set fire to the husband's wife before escaping.
** Finch (who happens to be the leader of the loosely-knit tricker-treaters) does it again when an old woman gives him an apple for candy, which he sees as unforgivable. If he doesn't get any treats, then the old woman gets "tricked", when Finch and his gang give an apple stuffed with razor blades to a town cop, whose death prompts the woman to get arrested. [[https://www.youtube.com/watch?v=V5jnV3_HLV4]]
* Hit-Girl from ''ComicBook/KickAss''. While in her civilian garb she plays off as an innocent little girl, but outside of this, due to TrainingFromHell from her father, she is incredibly skilled with any weapon but she favors swords and knives in particular and can slice through an army of thugs in minutes and can shatter a man's leg with a single kick. She does all of this with sadistic glee, and [[SociopathicHero she's one of the good guys.]]
* The villains of the ''ComicBook/XMen'' event "Schism" are a quartet of rich 11-to-12-year-olds who have joined the Hellfire Club. They include the new CorruptCorporateExecutive of the company that manufactures sentinels, who got the position by murdering his father and blackmailing the board of directors; a Bavarian child prodigy descended from Victor Von Frankenstein; an AxCrazy badass hotel heiress; and a West African SelfMadeOrphan who's taken over his family's slave trading empire.
* Later ''ComicBook/XForce'' villain Genocide is a ten-year-old boy. A giant, radioactive skeleton in an intimidating-looking containment suit, but a ten-year-old boy. He's got enough [[ILoveNuclearPower nuclear firepower]] to blow up a town, and he curbstomped ''Wolverine''. Subverted in that he doesn't appear to be a "bad" kid, exactly, he just admires and tries to please really bad people (the followers of Apocalypse, if you must know).
* Numerous characters from [[BritishComics British Humour Comics]] fit this trope, examples include ''Ivy the Terrible'' and ''Bea'' from ''ComicBook/TheBeano'' ''Cuddles and Dimples'' from ''ComicBook/TheDandy'' and Sweeny Toddler from ''ShiverAndShake'', Whoopee! and ''ComicBook/WhizzerAndChips''.
* Jimmy Marks aka Hybrid. The son of a human woman and a [[ComicBook/RomSpaceknight Dire Wraith]]. He started out as a relatively normal child, but when a bunch of his dad's old comrades showed up looking for him, they took an "interest" in the boy and taught him the ways of power and evil. Jimmy took to their lessons like a fish to water and started terrorizing his parents (even his ''Dire Wraith father'' was terrified) and killing livestock ForTheEvulz. Even worse, around this time Jimmy's mutation -- extremely potent PsychicPowers -- also manifested itself. Psychic powers, the ability to go OneWingedAngel into a [[SuperStrength super strong]] NighInvulnerable monster even fouler than a typical Dire Wraith, and a penchant for evil that terrifies his own Dire Wraith father (who is a member of one of the most evil races in the Marvel universe, which is saying something) -- not a good combination. In his debut he ages his own mother to death, impales his father with a pitchfork when dad tries to kill him out of remorse for letting him become a monster, engineers a LetsYouAndHimFight scenario between Rom and the ComicBook/XMen by pretending to be a helpless child, and tries to abduct Kitty Pride for ''breeding purposes''. Hybrid was so evil that Rom was willing to set his weapon to "kill" when Hybrid proved too powerful to be banished to Limbo. Hybrid not only survives but gets ''worse'' with each later appearance. In ''ComicBook/AvengersAcademy'', he pulls the exact same "helpless youth" act to get admitted into the Academy, all so he can enslave everyone there and make the men his soldiers and the women his breeding partners.
* Ulysses Hadrian Armstrong, one of [[ComicBook/RobinSeries Tim Drake's]] recurring foes, definitely qualifies. He was a mass murderer by ten, nearly started a war by eleven, and graduated to full-on criminal mastermind by age fifteen.
* In ''{{Comicbook/Squee}}'', the six/seven-year-old Pepito is this... on account of being literally TheAntichrist. His introductory scene has him disintegrating a child's head.
-->'''Pepito''': [[IHaveManyNames I have many names.]] Son of the Dark Prince, Child of Darkness. Some call me the Altar Boy of Doom. Others know me as the Second Coming of Damnation. My mom calls me Pepito.
* ''ComicBook/TheAvengers:'' Ultron was one of these, trying to kill his creator Hank Pym within ''seconds'' of being turned on, while still calling him "dada", though this lasted only a matter of seconds.
* ''Franchise/{{Batman}}'': James Gordon Jr. showed signs of psychopathy at a very early age, something which his father was able to see and sent him away to try to get help. Unfortunately, [[SerialKiller it only got worse]].
* [[ComicBook/DisneyDucksComicUniverse Donald's nephews]] were this in their first appearance, with Della sending them to live with their uncle because they had blown up the chair their father was sitting on, but eventually grew out of this thanks to Donald raising them right.
** This is referenced in a story where the nephews had been kidnapped by two alien GalacticConqueror wannabes that brainwashed them into becoming their heirs: after [[PapaWolf beating the crap out of the kidnappers]], Donald went to rescue his nephews, got threatened by Huey... And immediately declared if he had already educated them out of that attitude once he could do it again. Two panels later he has spanked the brainwashing out of them.
* A 1990 ''ComicStrip/DickTracy'' stoyline has Tracy trying to figure out who is buying land in the Florida Everglades. It turns out to not be the CEO of a major corporation but his daughter, a child prodigy who is barely ten but already a genius who's a high-ranking VP. It turns out the girl is convinced that GlobalWarming is inevitably going to raise ocean levels and buying up this land will give her company an edge when it happens. She explains to her stunned father that by her calculations, by the time she's 30, she'll be able to use the bought lands to her advantage and increase the company's bottom line. She smugly adds that there's nothing Tracy can do as she's technically broken no laws. Tracy says she's right...and then turns to her father who promptly removes the girl from his company, vows to cut her out of the will and "oh, yes, you're grounded until your're 20."
* ''ComicBook/WonderWoman2006'': Ares' children are a group of boys who all look about eight, are closer to one, and run about spreading a HatePlague and personally inciting murder, and being dissapointed when things aren't violent enough.
[[/folder]]

[[folder:Fan Works]]
* Arial Kuyumaya of ''FanFic/RosarioVampireBrightestDarkness'' is a [[DownplayedTrope downplayed example]]. She's a cute little snow girl... with a HairTriggerTemper that borders on AxCrazy and a penchant for extreme violence when provoked. At least once, Moka and the others have pondered ''how'' Arial was accepted into Heaven in the first place, and Mizore has outright called her a "[[PrecisionFStrike fucking]] nightmare." That being said, it's noted she is in fact [[JerkWithAHeartOfGold a good soul]], and she's not without her PetTheDog moments.
* Princess Jody from [[http://fav.me/d4a27sp Super Milestone Wars]], subverted since she's [[OlderThanTheyLook older then she looks]]: she's [[ReallySevenHundredYearsOld actually over 1000 years old]]
* In the ''{{Series/Firefly}}'' fanfic ''Fanfic/{{Forward}}'', the resident psychopathic child is a [[MindManipulation mind-controlling]] girl created by the Academy. Impulsive and irrational, she goes on violent rampages [[WoobieDestroyerOfWorlds whenever she thinks she's encountered someone connected to her torture]]. This ultimately leads to both [[spoiler: the Hands of Blue]] and [[spoiler: the crew of Serenity]] tracking her down by essentially following the trail of corpses.
* [[spoiler:Brox]] in ''Fanfic/WithStringsAttached'' was an elven woman of unknown age who was murdered and then reborn as a five-year-old boy. Given her taste for sadistic jokes (that's why she was murdered), considerable knowledge, and willingness to step on people to get what she wants, she qualifies.
* In ''Fanfic/AttackOfGiygas'', we have Porky and Ashley. Ashley ends up turning [[spoiler: Lucas]] into one.
* ''Fanfic/MyLittleWesker'' expands on [[Franchise/ResidentEvil Wesker's]] history quite a bit. He was an advocate of eugenics and BlueAndOrangeMorality at an early age, and at thirteen years, Wesker successfully pulled off the murder of a 16-year-old bully after he decided he was a threat to his continued development.
* In one ''WesternAnimation/{{Frozen|2013}}'' case, Anna is shown to be this in a parody of "Do You Want to Build a Snowman?" called [[https://www.youtube.com/watch?v=78g0SyQjU1s "Will You Help Me Hide a Body?"]] At the beginning of the song, she asks her sister Elsa to help her hide someone's body "before he can decay" singing that [[AnArmAndALeg "it doesn't have to be in one piece"]]. She's ''five years old'' at that point. Her singing about throwing someone down a well, digging up graves and running out of space to hide bodies in caves when she's nine shows that she doesn't get better.
* In the ''FanFic/Gensokyo20XX'' Series, Yukari was this is as a child, along with being a ChildProdigy, being able to manipulate other youkai before she was out of babyhood (she was three when she started) and often manipulated them into attacking villages and playing the WoundedGazelleGambit.
** In ''The Tantrum Phase'' and its sequel, we have this with Chen. a rather tame example, who, in the former, throws tantrums and behaves horribly, even causing Ran and Yukari injury, and, then, in the latter, she tricks Marisa and both make trouble for Ran.
** In 20XXV, Reimu seems to be one to a lesser degree seeing that she once made it a habit to trick someone into sticking something in an electric socket, apparently, for her amusement. Of course, there is the fact that Baka is pointed out to be TooDumbToLive, seeing as he kept falling for it, along with the fact that he did use to pick on her.
* In the ''Manga/SoulEater'' fic [[https://www.fanfiction.net/s/10677407/1/Oblivion Oblivion]], [[MagnificentBastard Medusa]] was this as a child. As seen in her younger sister Shaula's flashbacks, she mercilessly mocked Shaula for every failure, convinced her that their [[TheSocialDarwinist father's]] lesson on survival of the fittest meant that as the weakest sibling, she was going to die, and was, in general, a cruel [[BigBrotherBully Big Sister Bully]]. Her response to their parents' murder was to restrain Shaula with her Vectors, taunt her about how Shaula couldn't go to anyone for help anymore, and then attack her with a knife. It's specifically stated that she did that when she was ''twelve years old.''
** As an adult, when she's about to [[spoiler: physically rip out Shaula's soul]], Medusa mentions that there were numerous times during their childhood when Shaula must have thought that she (Medusa) was really going to kill her, implying that she attacked her younger sister like this on a regular basis.
* In ongoing ''WesternAnimation/TheLegendOfKorra'' {{darkfic}} ''Crescendo'', the sadistically imaginative serial killer for whom the whole city has been on the hunt turns out to be [[spoiler:a twelve-year-old boy who's been [[DevilInPlainSight lurking in plain sight]] from the beginning]].
* [[spoiler: Alyssa Storm]] on Blog/AskTheNewHopesPeak. [[EstablishingCharacterMoment Her very first appearance has her]] [[CruelAndUnusualDeath kill her grandmother by]] [[BrownNote using a sonic weapon that causes her victim to]] [[BloodFromEveryOrifice bleed out from every orifice in their body.]]
* Scootaloo in ''Blog/AskPinkaminaDianePie'' is an accomplice of the SerialKiller protagonist.
* ''Fanfic/PokemonResetBloodlines'':
** Sabrina is revealed to be one in her side story, as she started using her powers to terrorize her hometown when she grew sick of their lazy attitude.
** Ash's father is, if anything, worse than that: he killed his mother at the age of ''10'', and only got worse from there.
* In ''Fanfic/NeitherABirdNorAPlaneItsDeku'', Hisashi brings up the trope while trying to dissuade his wife Inko from adopting an alien baby they found while camping at the base of Mt. Fuji.
-->'''Inko:''' So what if he's an alien? It's not like all aliens are evil. The ComicBook/MartianManhunter certainly wasn't evil. Besides, he's just a baby, and babies can't hurt people.\\
'''Hisashi:''' Yeah, but the people they grow up to be can! Besides, how do we even know he's even actually a baby? ''[steps over to Inko and peers at the baby]'' For all we know, he comes from a planet of beings that just look like babies, and they all try to use their overwhelming cuteness to infiltrate societies and destroy them from the inside! ''[baby giggles and squeezes Hisashi's nose]'' That doesn't disprove the theory. ''[removes baby's hand from his nose]''
* Both Charlotte and Vendetta in ''Fanfic/PaintItGreenBlueBlack'', but especially Charlotte after she awakens the RepressedMemories of her parents' murder. Charlotte goes on tangents about people having "jam" inside them and how she wants to spread it everywhere. She even weirds out ''Vendetta''.
* In the ''Frozen'' fic ''Fanfic/InPainAndBlood'', Elsa's youngest son Aksel hates his older brother and wishes he was heir instead. At age eight he uses his ice powers to try and seriously injure his brother. He's completely unrepentant about it and considers it Aron's fault for being "weak". A decade later, Aksel tries to poison Aron and almost gets away with it, but he's found out before he can murder his brother.
* ''Fanfic/InfinityCrisis'': Sinthea Schmidt, granddaughter of the Red Skull, made her first kill when she was seven.
* ''Fanfic/RWBYScars'': Even as a child, Neo was aggressive. She stabbed a girl at her daycare with a fork and [[BadPeopleAbuseAnimals threw rocks at squirrels]]. Neo's behavior caused her mother to reject her as a "monster".
* In ''WebVideo/UltraFastPony'', Apple Bloom is the preteen child of a mob family, and she's already taken to the lifestyle: blackmailing adults to get her way and burning down schoolhouses. Her friend Sweetie Belle is a creature of id, who destroys stuff on random whims and expects she can charm her way out of the consequences.
* ''FanFic/WithPearlAndRubyGlowing'' makes canon example Darla Dimple even worse, willing to [[NauseaFuel damage herself]] with a hairbrush handle to frame Danny for child molestation.
* In ''Fanfic/AnIdealGift'', Donatello claims that while the four-year old Irrilia is usually adorable, she can be "crazy-scary" when angered, a trait he insinuates she got from Raphael.
--> '''Raphael:''' Trust me, my temper's got nothin' on hers.
[[/folder]]

* ''Manga/MajinTanteiNougamiNeuro'': After he was born, [[BigBad Sicks]]' father handed him a razor to gauge his potential. Sicks used it to slash the throats of all the babies in the Maternity Ward. He killed his mother when he was 2 years old and his father when 4 years old. By the time of the series takes place, Sicks is the CEO of an international arms manufacturer... And '[[MadeOfEvil Absolute Evil]]' as far as the entire cast is concerned.

* Vitiate in ''VideoGame:StarWarsTheOldRepublic'' and ''VideoGame/KnightsOfTheOldRepublic'' tortured his mother for SIX MONTHS before killing her and then gathered an army marched to the capital of his world where he was declared the Sith leader at 12.

%%** The Anointed One.

* The apparent physical age of immortals from ''Series/{{Highlander}}'' is fixed at the age of their first death; two episodes featured an evil immortal who had undergone this at seven years of age.
** A [[Really700YearsOld centuries old]] Immortal in the body of a teenager, Kenny has survived for hundreds of years by playing on his youthful appearance and the sympathies of older kind-hearted Immortals for protection since he's at a severe physical disadvantage. Then he takes their heads when their back is turned. Amanda ''especially'' grabs the IdiotBall where Kenny is concerned, since she was the Immortal who originally discovered him (prior to his FaceHeelTurn when he really ''was'' an innocent boy) and refuses to believe Duncan's warnings, even though [=MacLeod=] already had several prior encounters with him.

* [[spoiler:Iris Zeppelin]] in ''VideoGame/RosenkreuzStilette''. [[spoiler:Her central goal is to become god of a world of her own design, but most of her actions are [[ForTheEvulz solely for the hell of it.]] She believes that she has a right to destroy whatever she wants, and in turn commits wanton murder, of innocents; those she deems not useful to her; and her own family members, choosing victims based on who would suffer the most from their deaths. She's also a [[ManipulativeBastard very skilled manipulator]] as well, in fact, she masquerades as a harmless young girl while also staging in motion the war between the RKS and the Empire. In the second game, ''Rosenkreuzstilette Freudenstachel'', Iris and her [[TheDragon Dragon]], Eifer Skute, manipulate the Schwarzkreuz into starting a "witch hunt", and they even turn the Schwarzkreuz against their own captain Pamela by having them brand her a holy traitor to the Orthodox Church, motivating Pamela's resolve to slay her vilifier. Iris later had Eifer murder the pope, and afterwards, have her badly wound Pamela with a surprise attack. Iris continued to show her selfish and manipulative side by having Eifer turn into the Dark Devil and allowing her to die, and ''possessing [[TheHeroine Spiritia]]'' and forcing her to fight to the death against Freudia, her own childhood friend. Driven by little more than a sadistic desire to satisfy her lust for pleasure and entertainment over the suffering of others, Iris is a villain of the highest caliber: one that would make even [[VideoGame/MegaManClassic Dr. Wily]] himself ''cringe'', but is more likely to make similar characters like [[VideoGame/MegaManX Sigma]], [[VideoGame/MegamanZero Dr. Weil]] and [[VideoGame/MegaManBattleNetwork Dr. Regal]] proud.]]

* [[spoiler:Iris Zeppelin]] in ''VideoGame/RosenkreuzStilette''. [[spoiler:Her central goal is to become god of a world of her own design, but most of her actions are [[ForTheEvulz solely for the hell of it.]] She believes that she has a right to destroy whatever she wants, and in turn commits wanton murder, of innocents; those she deems not useful to her; and her own family members, choosing victims based on who would suffer the most from their deaths. She's also a [[ManipulativeBastard very skilled manipulator]] as well, in fact, she masquerades as a harmless young girl while also staging in motion the war between the RKS and the Empire. In the second game, ''Rosenkreuzstilette Freudenstachel'', Iris and her [[TheDragon Dragon]], Eifer Skute, manipulate the Schwarzkreuz into starting a "witch hunt", and they even turn the Schwarzkreuz against their own captain Pamela by having them brand her a holy traitor to the Orthodox Church, motivating Pamela's resolve to slay her vilifier. Iris later had Eifer murder the pope, and afterwards, have her badly wound Pamela with a surprise attack. Iris continued to show her selfish and manipulative side by having Eifer turn into the Dark Devil and allowing her to die, and ''possessing [[TheHeroine Spiritia]]'' and forcing her to fight to the death against Freudia, her own childhood friend. Driven by little more than a sadistic desire to satisfy her lust for pleasure and entertainment over the suffering of others, Iris is a CompleteMonster of the highest caliber: one that would make even [[VideoGame/MegaManClassic Dr. Wily]] himself ''cringe'', but is more likely to make similar monsters like [[VideoGame/MegaManX Sigma]], [[VideoGame/MegamanZero Dr. Weil]] and [[VideoGame/MegaManBattleNetwork Dr. Regal]] proud.]]

* Young Tom Riddle as seen in ''Literature/HarryPotterAndTheHalfBloodPrince'' is already convinced that he's [[{{Ubermensch}} special and different from everyone around him]], honing his magical skills by torturing other children and killing animals, and manipulating adults by [[DeliberatelyCuteChild putting on a polite and quiet act]] when he wants something.

* WesternAnimation/MyLittlePonyFriendshipIsMagic:

* ''VideoGame/Starcraft''has Nova Terra, a somewhat heroic example. As a preteen she becomes a WoobieDestroyerofWorlds, after her family are all killed during an attempt to capture her. They were trying to capture her, because she has psychic powers. She gets inducted into the Ghost program, and naturally, put through their TrainingFromHell (complete with thorough {{Brainwashing}}). After killing a lot of people, Nova ultimately gets her real personality back: with some help from her friends and the Protoss leader Artanis. Nova ultimately ends up rebelling against the government and after the successful rebellion overhauling the Ghost program.

** At least until the 'Siege of Orgrimmar' raid, where, [[spoiler: after the player defeats Garrosh Hellscream, putting Troll leader Vol'Kendall in charge as the new Warchief]], Wrathion reveals that [[spoiler: he was rooting for the Alliance to win, having put effort into making sure they had their chance to dismantle the already-damaged Horde, becoming very angry that it didn't happen the way he wanted, and swearing that something bad was coming and he only wanted to prevent it.]]

* In one ''Disney/{{Frozen}}'' case, Anna is shown to be this in a parody of "Do You Want to Build a Snowman?" called [[https://www.youtube.com/watch?v=78g0SyQjU1s "Will You Help Me Hide a Body?"]] At the beginning of the song, she asks her sister Elsa to help her hide someone's body "before he can decay" singing that [[AnArmAndALeg "it doesn't have to be in one piece"]]. She's ''five years old'' at that point. Her singing about throwing someone down a well, digging up graves and running out of space to hide bodies in caves when she's nine shows that she doesn't get better.

* Kerchak falsely believes this of a young Tarzan in the stage version of [[Disney/{{Tarzan}} the 1999 Disney film]], when he comes upon the child fashioning a spear.