Marge:(looking out the window to the front lawn) There's just something about flying a kite at night that's so unwholesome. Bart:(turns head to the window. In monotone with glazed, glaring eyes and an eerie smile)Hello, mother dear.
One cellphone commercial played with this trope, featuring loads of Creepy Children (including a pair of white-kneesocks-wearing twin girls sing-songing, "We want a cellphone"). It ended with a message to parents that they shouldn't be scared to buy cellphones for their kids, although if you had kids like that, wouldn't you be wary about giving them what they want?
The early "Dead Zone" ads for Verizon featured pairs of creepy siblings (two brothers in dress attire and twin girls in blue dresses).
An ad for Australian real estate agent L.J. Hooker ended with a creepy girl's gratitude "Thank you, Mr. Hooker". The really scary part was, she probably wasn't meant to be creepy.
Gaara of Naruto starts out this way, thanks to certain well placed traumas in his past, as well as being the Soul Jar for the One Tails. Thank God he gets better.
Sasori is a milder version of this when he was younger, after his parent's untimely deaths. It just gets worse until he snaps. Unlike Gaara, he doesn't get better.
Itachi also qualified, being a gifted Child Soldier and The Stoic since he was seven years old. His father mentions that he's 'always been a bit strange.'
If the flashbacks are to be believed, and if his dark side is of any proof, Naruto himself was this when he was about 4-5 years old, at least until he decided he wanted to become Hokage and to stop feeling sorry for himself.
Koon Agero Agnis from Tower of God used to creep the servants of the Koon family out a lot as a child, probably because he could easily see through everybody.
In one episode of Yu-Gi-Oh! 5Ds, Rua went up against a ghostly child named Michael. Michael - but not Claire - was ignorant of the fact that they were dead, and Michael was obsessed with protecting his sister. Fortunately, losing a duel to Rua set things straight.
Welsper from the Ah! My Goddess manga, who took advantage of his appearance to get closer to Belldandy in ways Keiichi hadn't, such as sharing a bed with her.
Johan Liebert. Though most of the story takes place in 1995, in which he is a very creepy 20-year-old instead, he's been a sociopathic murderer and master of More Than Mind Control since he was 9. There is also Dieter, who has a genuinely creepy moment during the "Kinderheim 511" arc, despite being one of the most innocent characters in the story.
Also, Johan's twin sister Nina/Anna had trappings of this when we first see her.
Martin (from the episode A Child's View). While he may not be clever enough to be the next Johan, one could easily see him growing up to become like Roberto.
MW has Michio Yuki becoming this after inhaling MW.
In Slayers, Hellmaster Phibrizzo, Man Behind the Man to Chaos Dragon Gaav (who is, oddly, another Big Bad but not The Dragon to Phibrizzo) and one of five ancient demon lords, takes the form of a ten-year-old child in every appearance.
In Evolution-R, Rezo the Red Priest in Pokota's human body.
Vanilla H, the youngest of the Galaxy Angel haremettes, is an Emotionless Girl that spends most of her time praying. The anime plays this up to comically scary levels.
In the Fullmetal Alchemist manga and the Brotherhood series, Selim Bradley starts to show Creepy Child tendencies once he's revealed to be the homunculus Pride. He's an Eldritch Abomination.. Bonus points because that form is his true body, so he looks that way while cutting people in half with his eye-filled shadows and eating his own allies, sometimes all done while smiling. As The Dragon he comes as the most terrifying and just plain evil of the Homunculi bunch.
The title girls from Gunslinger Girl appear to fairly normal children — at least to outsiders. During their missions they change into relentless killing machines, showing hardly any emotion whatsoever, contrasting heavily with their innocent looks. Especially the actions of Rico are often jarring, since she is prone to kill innocent bystanders and remorselessly tortures people to get a confession.
Both Enma Ai and Kikuri from Hell Girl are excellent examples.
Sabrina, the psychic Gym Leader from Pokémon with a nasty habit of turning people into dolls. Actually, the real Sabrina (as seen in the games) is older, but her childhood form still wanders around as a doll bouncing a ball. (Sabrina's father is a little creepy himself, but then, she inherited psychic powers from him too, apparently.)
In the movie Pokemon 3: Spell of the Unown, Mii/Molly is a seemingly innocent child whose mother left due to her husband being obsessed with studying the Unown, and Molly's father is taken by the Unown themselves. While playing with the Unown tiles, she summons the Unown, who create an illusion Entei. She proceeds to use her innocent desire for friends and parent figures to have Entei kidnap Ash's mom and brainwash her into think that she's Molly's mother, get a LOT of the countryside covered in weird crystals, and, when Ash tries to get his mother back, she spawns waaaay too many of said crystals. In spikes. To make matters worse, she ends up being able to control the Unown, and ends up as a little girl in a grown woman's body trying to be grown up. She even has three crystal Pokémon, which are all based off three cute mons, but are all insanely powerful.
Zazie the Beast, in the anime version. Unless he's actually some kind of midget.
Also from the anime, young Knives. He started out just Vash's more serious and mature twin brother, but even before he starts his Evil Plan to wipe out the crew and crash the fleet he has started to give off some seriously creepy vibes.
Manga young Knives, in a very different situation, manages this briefly right before going Axe Crazy, with his Dissonant Serenity after The Reveal. He's faking Easy Amnesia. Until then, manga Knives is the sweetest little thing, who really believes that everyone can understand each other and everything can be worked out because everyone's hearts are the same.
Manga Legato, in his back story. I mean, yeah, when he's having his weird Meet Cute amid the rubble with Knives, then it's just the saddest Hope Spot ever, but before they found out his plot and started raping him to death he was this kid putting off his bid for freedom to be sure of being able to kill absolutely everybody he had ever met with his mind. Have we mentioned this is a Crapsack World?
Miyu. She's got the excuse of being mentally an older woman who was allowed to keep a teenage form to capture the Shinma.
The little girl form the first OAV, Aiko, also qualifies. We first see her as an Ill Girl in a Convenient Coma, but later we learn that she sold her soul to a Shinma after her parents died in a car accident where she was gravely injured and, out of trauma, she started calling herself a vampire since they donated their blood to her to save her life, right before perishing. She's both creepy and terribly pitiful.
When at her worst, Shokatsuryou Koumei (Zhuge Liang) from Ikki Tousen. She's a middle school Moeblob who never changes her expression and can devise the most amazing and shocking plans... She's mostly on the side of good, adores her leaderess Ryuubi and is nowhere as villainous or ruthless as her rival Shiba'i, but she's still creepy.
2nd Grade Undertaker Daida "Punishment" Hibana, who knows way too much about various methods of torture having apparently learned from her mother, shown in flashback watching over her "suspension". Understandably, she is a bit delusional having to invent nonsensical punishments for herself after her mother apparently committed suicide.
There's also Minatsuki Takami when she was a child.
The Creepy Twins Ichi and Hajime, who at first seemed to be a single, creepy Forgery kid with a lollipop.
Masato from Rumiko Takahashi's Mermaid's Scar, the second compilation of the Mermaid Saga. At first glance he looks like an eight year-old boy, living happily with his mother... but then, why does the mother look so sad to be with him? Why did she try to abandon him? Why is she trying so hard to kill him? He's also pretty handy with Razor Floss and an axe as big as he is.
Joshua Christopher from Chrono Crusade becomes this after Aion puts Chrono's horns on his head. Although most of the time we see him he's 14 and doesn't look quite like a child anymore, in his crazier moments he still acts like he thinks he's ten—which only helps the creepiness.
Yachiru as a toddler was drawn to blood to the extent that she was trying to touch Kenpachi's blood-soaked sword when she first met him. Now she's the lieutenant of the Blood Knight division. For all her cherubic appearance and cutesy ways, she's blood-thirsty, as excited by Kenpachi's fighting and killing as Kenpachi himself is, her reiatsu can terrify the messengers of captains, and her entire division is terrified of her.
Gremmy Thourmeaux from the Vandenreich is this and more. He's a pre-teen who takes pleasure in how he can use his imagination to kill. His smiles are manic and insane and his eyes are vivid red, with no visible difference between sclera, pupil and iris.
The Amazons Quartet. It is not known how old they really are, probably not older than 13-14, but they tend to act very childish and apparently find battles against the Sailor Team "fun". Yet, their tactics aren't anywhere near innocent.
Anime!PallaPalla is an extreme example. More often than not, she's a Third-Person PersonBratty Half-Pint who often cries, throws tantrums, and demands to be entertained by her "sisters"/teammates. Then comes the episode with the dental clinic, where she declares that the best way to cure cavities is to rip the head off (which she demonstrates on a doll, creeping the fuck outta the other girls). Then the anime episode where she controls the senshi using an enchanted doll to make them repeat the doll's movements, and then she nearly tears said doll apart by its hands. And we also have the episode where she attacks dozens of people (the other girls tend to attack only one person), rips out their Dream Mirrors, and then cheerfully claps and sings Where, oh where is the Golden Mirror ~ before Moon and Chibimoon's arrival.
When she was no older than 12, Silvana Greone aka Intoccabile from Noir scared the crap out of a pre-teen Mireille Bouquet when they played together, due to her unhealthy fixation with pointy objects. By the time she's in her 20's, she's a full-blown Dark Action Girl and still a thoroughly creepy Magnificent Bitch.
We briefly see Chloe as a child, and she was also pretty creepy. To not say of little Kirika, who killed Mireille's family before she turned six. And boy does that haunt her teen self when she recalls it.
Mokuba's original form in the manga was pretty bad, too. Especially given he forces Yugi to play a rigged game with him, and until the Other Yugi comes out it's a fifteen-year-old who seems like a little kid facing a ten-year-old with the mannerisms of a mafia boss. And that homicidal grin when he was cheating at roulette to poison Jounouchi and Yugi to death...
Ciel's a cynical, jaded, and very driven 12-year-old (or 13, depending on how far you are in the series) who is a Chess Master and wise beyond his years. He has no qualms about getting involved in dangerous missions and will command his badass butler Sebastian to kill someone without a second thought. Then again, there's a reason why he is the way he is now.
Alois from season 2. He's Ciel on scary.
Alois's younger brother Luka. Being rather pleased that your Deal with the Devil killed a village is weird.
Leo, post-Face-Heel Turn (sort of), at least when he was "trying" to fight Oz.
Lacie as a child. She intentionally cuts and licks Jack's ear while trimming his hair, and later, after slaughtering two slavers with her chain, the only comment she makes as she stands amidst the carnage is, "Look, Jack! Blood red rain!". As an adult, however, she seems to have mostly grown out of it.
Phillipe West after his father's deathis seen in one panel talking on a disconnected phone to his father.
Mariko Kurama or Number 35; appearing like just another cute little girl until she rips you open with her 11 meter long, inhumanly strong 26 invisible arms which she views as a fun game thanks to how she was "raised" (if we can call THAT "rising"), and that her victims are her playthings. In the manga she has even more arms with an extended range as well.
There's also the cruel kids from the orphanage Lucy lived in when she was younger. They often harassed her for her cute little horns, emotionless nature and loner status, and also because they were miserable themselves. Also, after she started caring for a puppy, the others forced her to watch as they kicked the dog and beat it to death with a vase, just to try getting her to show something. Even creepier in that the whole time they did this they all sported huge slasher smiles and laughed at her. They got more than they bargained for: Lucy snapped and left no witnesses.
There's also a girl that pretended to be friends with Lucy and later sold her out to the mean boys by telling them about the dog, fully knowing that they'd use the dog to torment Lucy further. She even cries for Lucy upon finding out that the boys beat Lucy's dog to death and made her watch, but as she does this we see her smile and her fake crying turns into peals of laughter.
In episode 9 there's a scene where Child!Lucy hallucinates and sees the mutilated dead bodies of the cruel kids come back to life and mock her. Afterwards she is seen talking with the voice of her DNA inside her mind, leading to her attempting to strangle Kouta. After finding out that Kouta lied to her about the gender of his cousin he was going to a festival with she goes on a rampage, murdering everyone in sight, including Kouta's father and sister, and tries to go after Yuka but Kouta tackles her and demands that she stops... Yeah, Lucy was this.
Anju, Karin's younger sister, is an Emotionless Girl vampire who carries around a knife-wielding talking doll that is possessed by a serial killer. She later proudly shows Karin her collection of creepy dolls and asks if she wants to hear their history. In response Karin rather understandably lets out some Tears of Fear and promptly exits the room.
Shiho: "The pain and hate of the fish which were brutally murdered... it's delicious."
In a flashback arc, we find out that before she and Aoi first met Kaoru (at the age of 5) Shiho was even more sadistic. One of her favorite ways of torturing Aoi was making crime scenes from Aoi's dolls. (In which she was creepily creative!)
Hyobu has his moment, when he suggests shooting an enemy pilot in a forehead as the quickest method to deal with his plane. He is 8 at that time.
V.V. looks like a cute boy with lustrous Rapunzel Hair but he's actually a man in his 60's, because he got his Code at an early age so his physical growth was stunted. He is the older twin brother of Lelouch's father, Charles vi Britannia, and he murdered Lelouch's mother, Marianne vi Britannia entirely out of jealousy when she started getting too close to Charles for his liking. He's head of the Geass Cult, a rather shady, creepy society in and of itself which produces tyke bombs like the ones described below); and he tries to kill Lelouch, Charles son and his nephew. He is the creepiest character in the series, by far.
Rolo Haliburton/Lamperouge, who starts off as a Tyke Bomb sent to spy on and eventually kill Lelouch, until Lelouch uses the feelings of brotherly love Rolo's built up over the past year to manipulate him with the full intent of killing him once his usefulness runs out. This proves to be effective because Rolo, as a raised-from-birth assassin, has never known any form of real kindness. Unfortunately, this backfires when Rolo becomes so obsessive and fixated on being the only person his "brother" cares about that he murders Shirley, one of the few people Lelouch was genuinely close to, and plans on killing Nunnally, who's Lelouch's whole reason for living. He does manage to redeem himself by the end though.
There's also the scene near the middle of R2 when the Black Knights are in the laboratory where the engineered Geass-children are. About four of the children, after Geassing a Black Knight to shoot another, look up at Rolo and shout, "Big Bro Rolo, is that you?" all smiling and whatnot. Then Rolo smiles back, and promptly shoots them.
Ginger Bread is a vice-captain of the Millefiore Family's eighth squad, the enemies of the main protagonists in the future. He is also known as the Magician's Doll, primarily due to his usage of similar looking dolls that are clothed in a wizard's hat and cape, and have stars in their eyes (like he does), to fight. In addition, he uses spiders, summoned by what he calls sorcery. He claims to have had a hand in the death of Colonnello. As such, Lal Mirch engages him in battle, but after he loses, it is revealed that she was only fighting one of his dolls.
Mukuro Rokudo, when he was a child, as a result of his Dark and Troubled Past. He has a strong dislike for the Mafia due in part to the experimentation he suffered as a child at the hands of the Estraneo Mafia family. He killed his captors and he offered Chikusa and Ken, who were also victims of experimentation, a chance to join him in his quest to destroy the world. However, not only does he want to take revenge on the Mafia by destroying it, he also wants to cleanse the world of its filth by invoking universal suffering through a world war. Also, Mukuro was taken in when he was a child by a Mafia boss named Lancia. Except Mukuro betrayed and brainwashed Lancia with his Magical Eye which forced him to kill his entire family. And during his first meeting with Tsuna, he pretends to be a poor, innocent boy who was kidnapped by... Rokudo Mukuro.
Adorably Precocious Child Maki. He'd be a little creepy even if he was just a sociopath with the power to make stuff blow up, but he also has a massive, crazy stalker-crush on his boss, Amber. Such an insane crush, in fact, that he completely abandons the usual Contractor "emotionless" act when he finds the guy Amber's in love with, and tries to kill him even though if he'd succeeded, it would have ruined Amber's entire plan, resulting in a genocide.
Any child Contractor has these traits. They are disillusionedkilling machines, who lost their emotions and consciences, due to Gate's influence. Just like their adult counterparts.
xxxHoLic: Creepy Twins Moro and Maru, Yuuko's two assistants at the shop. It's revealed early on that they have no souls, and later, that they keep the shop grounded between dimensions.
In Full Metal Panic!, Sousuke, as a result of his heartbreaking backstory. He goes from being a sweet, innocent kid to a child soldier who kills without batting an eye, has an extremely nihilistic view of things, and acts creepily unemotional. Especially noticeable here. In one of Gauron's flashbacks we see Sousuke as an 12 year old child soldier in Afghanistan, casually tossing bodies into a fire.
Kalinin: It's my belief that my nation... stripped that boy from his humanity.
Though, in Gauron's twisted world view, Sousuke was less the "Creepy Child" and more the saint of battle...
Ichise too. As a child he was perpetually emotionless, even when he and his mother come across the body of his mutilated father hanging from the ceiling. While his mother cries at the sight he just looks at her with a confused expression on his face.
And then there's Kano. Although the series doesn't show his childhood firsthand, it's made amply clear that he was an extreme Creepy Child who never really grew up, always wanting a bigger playground and more real people to play on.
Souma's 14-year-old younger sister Sakurako from Sakura Gari. She was already plenty creepy as a teenager, but when we see her as a little kid in a flashback... oh, boy. She appears pointing at Souma with a blank expression on her face right after Katsuragi force Souma to kill Sakurako's mom for abusing him, and later she appears carrying around an oversized kimono, peeing herself and giggling madly during a cherry blossoms watching session.
Souma as well. In the first scene, he was barely 11-12 years old, and with his cynical smile he creeped the shit out of a detective investigating Lady Saiki's death. And then we learn why he is that way...
Loveless is full of creepy children (and adults) with twisted pasts, but one that stands out is Kio's daughter, who looks ten, acts forty, is the head of the (very wealthy) family, and has no cat ears — meaning she's not a virgin, or possibly not a normal human seeing as Kio would have conceived her when he was ten.
James, of Gregory Horror Show, appears to be a typical Hotel Hellion who only wants to play. However, his idea of "playing" involves putting people in danger (his grandfather nearly chokes to death while James uses his body as a swing in one episode, and he doesn't even seem to care), and on several occasions he deliberately puts the Guest in life-threatening/terrifying situations, chuckling happily all the while. When the hotel is set on fire at the end of the second series, James uses it as an excuse to play "firefighter," and in the next episode acts very cheerful as he talks about how "cool" it was for his skin to burn off.
In Detective Conan, Edogawa Conan and Haibara Ai might not actually be7 year olds, but they certainly come off that way to everyone else. Conan is undisturbed by every gruesome murder they come across as he walks up to the body and looks for evidence. Haibara doesn't even bother acting like a little kid, foregoing that for her sarcasm and incredibly cynical worldview. And her occasional suicidal tendencies.
Besides, being 17 and 18 isn't that much less creepy when they're acting like that.
Sometimes Conan/Shinichi is just trying to be creepy. There's no other explanation. Like in a conversation between him and Takagi, right after Conan tells him exactly why they have other option but waiting to defuse a bomb in the same room as them until seconds before it explodes, in order to get a hint about where the next bomb is. It's even worse because Conan is the only one who can get to the bomb to defuse it. Because Takagi doesn't know that Conan is really a seventeen year old genius detective, this conversation follows:
Takagi: Tell me one more thing. W-Who on Earth are you?
Conan: Oh. Well if you want to know... Then I'll tell you. In the next world.
Luna Koizumi from the Gakuen Alice manga is an extremely Creepy Child, not only two-faced, but also being able to charm people into supporting her, while taking everything away from Mikan to make her life a living hell. She even tries to strangle the poor kid!
The Night Walker anime loves this trope. First, there is an episode with Shido trapped in a well with a Breed and a child. Shido spends the entire episode trying to protect the "innocent little girl" but it turns out, the girl turned out to be a vampire, most likely an evil one. There is another episode with a little boy who died and turned into a Breed and killed and mutilated pets and stray animals to feed off them. The child's mother, however, refuses to let Shido kill the Breed, convinced he is still her son... which leads to an even creepier resolution: since he can't do anything to convince her, Shido just leaves them alone.
Soul Eater's Crona flip-flops between being the Creepy Child and The Woobie. Also, little Rachel after Medusa takes over her body. Stein was almost certainly this as a child/young teenager, as a flashback shows him casually beating up a man while ignoring Spirit's complaints.
The Child. The Child only appears on nights of the full moon, and has no name nor does he speak. The Child seems to have strange powers of controlling demons just as his misshapen form did. He has an uncanny resemblance to Guts and Casca and is strangely attracted to both of them, but he mysteriously disappears just as he reappears.
Rosine, too. She's the youngest of the Apostles and their local Dark Magical Girl, extremely broken due to her horrible past, also insanely powerful as well as cute-looking. And she's obsessed with Jill, a pre-teen girl who once was her best friend...
Also Sanetoshi's companions Souya and Shirase. These two Creepy Twins dress and look like clones, finish each other's sentences, seem to be completely devoted to Sanetoshi, don't say almost anything except singing praises to him with creepy and child-like smiles... uuuuuh.
Little!Himari skirts this line. Especially when she coldly tells little!Shouma about what happens to the Unchosen people of this world. Thank God she gets better.
Himari: "This world is divided into the Chosen and the Unchosen. To be Unchosen is to die.
Btooom! has Kira Kyousuke, a 14-year-old boy who likes to crush small animals and who raped three women to death.
The Emperor becomes one of these for a short while in Houshin Engi. Blame Dakki's influence and experiments, but he's pretty damn creepy as a kid. Doesn't help he's also been turned into a superhuman weapon.
Hiei from YuYu Hakusho was a really creepy infant. Small pupils, sharp teeth, and a Slasher Smile. Well, he's a demon after all. And when he grew into a kid, he was a Blood Knight who killed other demons for fun.
Any time you see a child in Hunter × Hunter, chances are he or she will be creepy. This includes the two main characters.
Gon, the protagonist, is a boy from a backwoods culture with an innocent heart. However, due to his Blue and Orange Morality outlook on the world, he can behave unsettlingly to those not familiar with him and his background. Not to mention that if anyone gets on his bad side (and he has a lot of patience with people he dislikes), he is downright frightening, such as him literally punching Neferpitou into a pulp.
Killua, the deuteragonist, is Gon's age. He freely murders people in bloody ways without batting an eye, as he comes from a family of assassins and thus does this regularly. That being said, he learns friendship and compassion from Gon as they travel together, so he becomes less creepy as the series goes on. He can still be quite scary though if he's angered, just like Gon.
And more recently, we're introduced to Killua's younger brother Alluka. When he asks you to do something, and you don't do it, he kills you and likely a lot of other people you know. When he asks you to do something, and you do do it, his eyes and mouth go completely black◊ but is otherwise harmless. Still freaky though.
On one hand, there is the no older than 12 Touga Kiryuu. While Nanami's memories have him as a real Nice Guy, the flashback to him and the also young Saionji stepping into the funeral of Utena's parents has him casually touching little Utena's hair, showing next to no empathy for her plight (unlike kid!Saionji), and having already signs of being a Manipulative Bastard in training.
And on the third and final hand, we have Nanami herself. When she was a child, she gave Touga a kitty as a pet, and when the kitty took his attention away from her she killed the kitten via stashing it in a cardobard box and placing it in the near stream. (It's implied that she barely understood what this actually meant, but it's still creepy.)
The Cuckoo from the Sandman arc "A Game of You," arch-enemy of the Narnia-like dream-fantasy "Land". Despite her name (and true nature), she mostly appears in the form of a young, pig-tailed, freckled blonde girl — in fact, the childhood form of Barbie, the arc's protagonist.
Innocence (AKA the Child) is part of a malevolent and extremely powerful living tarot arcanum called The Basanos in the Lucifer comic book. She takes the form of a young, barefoot blonde girl and appears most often as their spokesperson. Her power is the ability to make people "see the world with fresh eyes" - that is, in a harsh light without illusions, delusions, or rose-colored glasses. As an added bonus, this power is exhibited as she walks down a seedy avenue in Amsterdam's Red Light district, causing everyone from hookers to cops to street people to come subtly repulsed at what they're doing.
Ariel Chylde in Darkchylde isn't stoic and her voice isn't a harsh monotone. Adults find her creepy because at roughly 12 years old she's smarter than most of them and she reacts to everything with open hostility and condescension.
And Damian Wayne, who first appears around age eight and attempts to murder the current Robin so he can take his place. A result of being raised by crazy ninjas, and also possibly the combination of Al Ghul and Wayne genes. Living with Bruce helped somewhat, but it's actually Dick Grayson who's really helped him into a solid Heel-Face Turn.
Talia accepted this and started to work on a replacement, eerily telling Damian "He'll be ten years younger than you when he's born" So, taking the above into account, when Damian hits 18, there's going to be trouble (or sooner, since there might be a Plot-Relevant Age-Up for the clone).
Little Keiko in Usagi Yojimbo. Her only relative was robbed and killed by bandits, and they were about to kill her too when Jei, the book's most stubbornly recurring villain, appeared, declared them to be "evil" and killed them. Keiko almost got the same treatment, but he randomly decided she wasn't evil. She's been traveling with him since then, calling him "uncle", and her ability to remain cheerful through massive bloodbaths is chilling.
What's also chilling that if this is a result of Jei's evil spirit suppressing her emotional development, the resulting emotional whiplash that is bound to happen if and when that suppression is lifted might likely traumatize her into insanity.
The X-Wing Series arc "The Warrior Princess" has Plourr flash back to her brother, Harran, when they were both children. Very definitely Royally Screwed Up, he was sociopathic, and the flashback shows him torturing an animal. Then Darth Vader, on a visit, used mental manipulation to transform his hot-blooded sadism into something cold and calculating. When a faction of nobles slaughtered Harran's family and one sister escaped, he tried to stop her so he could watch her die. She killed him and left his body to be eaten by scavengers. That's how she knows that the revolutionary calling himself Harran can't be her brother.
Fables has recently introduced us to the Literals and the Genres. Among the Genres, Horror is represented by a little blond girl in a pink dress.
Gail Simone's run on Wonder Woman had the Crows, five immortal beings disguised as schoolchildren who brew up paranoia and hatred in D.C. both naturally (through the distribution of hate literature and phony terrorist threats) and supernaturally (through a Hate Plague) as revenge against Diana for the death of their father, Ares.
Grendel has Stacy Palumbo, the adoptive daughter of Hunter Rose, who eventually learns that he murdered her real parents and thus manipulates him into a final confrontation with Argent, in a plan that includes murdering her governess to prevent her from interfering.
This is what Kiden Nixon thinks about X-23 in NYX. Actually, everyone in the series finds her unnerving.
Klara Prast of the Runaways, normally a Moe with a powerful Green Thumb, was suddenly transformed into a creepy child after a particularly traumatic accident during the last arc. While in creepy-child mode, she damn near destroyed the Runaways' house by summoning a small forest worth of vines and dispatched an entire squad of heavily-armed men. The latter feat was made even more disturbing by the fact that she had a completely blank expression while doing it.
Emily the Strange, a 13 year old goth girl with her own vocabulary of swear words, prefers rainy days and night time to daylight, and has an endless list of interests and hobbies that range from the silly to borderline gruesome. And the people she gets along with the best? Her four pet cats.
In the Neil Gaiman iteration of The Eternals, the childlike Eternal Sprite is reimagined as a Teen Idolwho also deliberately depowered the Eternals and wiped their memories, and who is aiding the Deviants in their efforts to awaken the Dreaming Celestial, all because the Celestials made him incapable of physically aging past age 11.
Rei from Aeon Natum Engel. Nine out of ten nerds agree that she is creepier than canon, while the last one is still obsessive of her no matter what.
In the The Legend of Zelda Fanfiction Free as the Wind (On the Recommendation page), Toon Link, of all Links, suddenly switches between Creepy Child and Cheerful Child on many occasions, which almost never fails to shock the other characters around him (including two other Links.) Him switching back into Cheerful Child-mode can sometime be really relieving, since his Creepy Child-persona's knowingness is very unsettling at times.
Screwball:'Cause you... are my Daddy Discord... and I... am a piece of you.
Sleepless contains several examples. The first installment has Diamond Tiara a nine-year-old serial killer with insomnia, and a couple of residents of mental clinic for foals in Trottingham. The third story in the series, Manehattan Blues adds White Dove who doesn't hesitate to burn a warehouse with her classmate inside. Children of Equestria gives us also Diamond Tiara's hallucinations of Silver Spoon and Curtain Call.
"Oh fuck," Naruto muttered, a chill sweeping through. He knew now, beyond any doubt, that he was in for it, only the most evil of demons pretended to be little girls. It was a fact of nature, the more innocent looking the little girl, the more evil the demon. This girl was the picture of innocence, which meant Naruto now faced a majorly gruesome end.
In Cori Falls's fanfiction Where Angels Dare to Tread, baby!James was supposed to come as Wise Beyond His Six Months, but looks like this instead. Seriously, which baby deliberately cries in his christening and then looks all "I did it to screw my parents's plans for me!"?
So very many Super!Harry Harry Potter fanfics, a result of trying to get him off to a good fixit start while following the books' timeline. Often due to time travel, but also to various weird upbringings and instances of becoming a Child Prodigy. Both lampshaded and not.
"Escape From Never Never Land", a Harry Potter fic, has a sort of subversion. On the surface she's a creepy child. But really she's really 14, trapped in the body of a child by magic which makes it worse....
Cream is seen as one in Always Having Juice, having a difficult time discerning the real from the imaginary due to her special power, and being diagnosed as mentally ill before being adopted by Vector.
The daughter of Harry Potter and the Winter Queen in The Denarian Knight. When they first met roughly a year after her conception (at which point she was seven or eight due to the differing passage of time in the faery realm) she said "Hello father" in the most deadpan voice ever and his response was "Okay, that's not creepy at all."
Quetzalcoatl in the Horseshoes and Hand Grenades story, A Month of Sundays who wants to find 'best friends' and think that the best thing about them is that they share...blood. To amp up the creepiness, he's a Serpent in a contract with Ankh and his human form is a child version of Ankh. The creepiness gets toned down after Jun gives him a Tastes Like Friendship moment and he becomes a shy, scared boy with abandonment issues.
Taya in Diaries of a Madman, whose lack of understanding of certain social conventions can make her come across as very creepy at times.
Ongetsu, Kurosaki Karin's zanpakuto spirit in Phases of the Moon and all its sequels and spin-offs, is this combined with Bratty Half-Pint and Creepy Doll. It doesn't help that he manifests as a Sinister Scythe that happens to be Anti-Magic. The doll is a stuffed black rabbit that Karin owned before her mother died, and represents her inner weakness and repressed emotions.
Films — Animation
Manna from Royal Space Force: The Wings of Honnęamise is one of the best anime examples — she doesn't really do anything creepy, per se (although she keeps a pet spider on a string!), but her muteness, sullen nature, and absence of anything even remotely feminine distance her from kawaii anime girls by a huge chasm.
Coraline: The Ghost Children. Especially the one with her mouth frozen open in an expression of perpetual horror. Depending on your point of view, the other Wybie could qualify in the beginning. There's just something creepy about his constant smile.
Lilo from Lilo & Stitch. She says things like "My friends need to be punished" in a monotone while placing spoons decorated as her Hula Halau-mates from a previous scene in a pickle jar and watching them, all while sitting next to a book titled "Practical Voodoo". She gets better, this being a Disney movie. Completely justified, considering that the movie takes place shortly after her parents are killed in a car crash and this is her way of coping with the loss.
Wednesday and Pugsley from The Addams Family films. Pugsley's not so bad, but Wednesday is played to the brilliant creepy hilt by Christina Ricci (just look at that smile...◊) Ironically it's the opposite in the comics and cartoons: Wednesday is quite sweet and normal-looking (and gets upset when she makes the dean's list) while Pugsley is a near carbon-copy of his Uncle Fester.
Newt from Aliens has her moments. "They mostly come at night... mostly."
The ghost of Jodie Defeo from The Amityville Horror remake. Possibly subverted due to there being the small implication that she's not actually evil and is forced to do "bad things" by the much more powerful spirit of Father Jeremiah Ketcham.
Besides Literature and Theater, The Bad Seed needs mentioning in Film since the 'perfect little girl' was so monstrous, the Hays Office apparently felt the need to add a new ending, killing her off with a divine lightning strike. And after that, at the end credits where the actors take their bows, the mother takes the girl across her knee and comically spanks her to relieve any further audience anxiety.
Curtis and Debbie from Bloody Birthday; two out of the three child serial killers in the film, they are the smartest in school and can manipulate anyone, except for Joyce who sees through their tricks and psychotic tendencies. Another creepy thing about Curtis is he's very perverted and murders a couple having sex in a van.
Tommy, Kayleigh's little brother from The Butterfly Effect, is very creepy as a child, staring at Evan while twisting the head off a doll. When he is a little older, he is a full-blown psychopath who's overly protective of Kayleigh and hates Evan. When he sees them kiss, he loses it and attacks a man at the theater, brutally assaulting him with a pole. Later on, he steals Evan's dog and burns him alive. When they attempt to save the dog, he beats the shit out of Evan, Kayleigh and their friend Lenny with a 2x4. Later, Evan goes back in time to prevent this event from happening. It ends when Lenny stabs Tommy with a shard of metal after being traumatized by accidentally causing the death of a woman and her baby. Tommy had dared him to plant the dynamite in the mailbox and told him that if he didn't, he would kill his mother.
It's implied that Tommy's dad sexually abused him as well as his sister. And in his defense, he apparently has a huge capacity for good as well as evil - one of his alternative futures is devoutly religious and helping the homeless, and in the novelization he's valedictorian and signs up in the Army.
Lillith from Case 39 whose own parents tried to kill her because they believed she was a demon who feeds from feelings. They're right.
The British 2008 horror movie named The Children, where children turn against their parents for mysterious reasons and start killing them.
The Strangers from Dark City had one among their ranks.
And he really stands out as the only one of the Strangers to even seem evil. They're mostly just desperate to save themselves by any means necessary, and another Stranger requires an injection of a serial killer's memories before he starts acting like a real villain. But Mr. Sleep is clearly evil from when we first meet him: he's flashing an evil grin everywhere when he's not just outright gnashing his teeth like a Cenobite, and he even viciously bites a guy's hand attempting to make him fall to his death.
The Guards, a 1965 Norwegian feature film has the fourteen year old Bene, who fills the role to a T. She is in a mental institution, filled with other children smaller than her (and somewhat creepy as well), and she is constantly playing Chopin on a piano without hammers, making an eerie tune with what is left of the melody. Furthermore, she is Dangerously Genre Savvy, and psychic as well, and is also deadpan and emotionless most of the time. Bonus points for creepiness when she almost kills one of her wards with a sleeping bag - seemingly going from Dissonant Serenity to Homicidal Maniac in seconds.
This movie was, by the way, part of a trilogy exploring children with psychological problems. The third movie, made in 1966, stars the same child actress, and the use of her eyes doesn`t make her less creepy in the Spiritual Successor.
John Preston's son in Equilibrium has to go in here somewhere. A kid with no emotions? Run.
In the film's setting, even children are required to take the Librium drug. So all "good" children are creepy. If they're not "good", they still have to act emotionless to avoid getting the authorities' attention.
Linda Blair's performance in The Exorcist is enough to actually make you believe Demonic Possession is real. There's a reason this movie is almost always listed among the top 10 scariest movies of all time, and she's that reason.
Many of the children from FrankenWeenie, especially E.Gore and Weird Girl.
Ginger Snaps Unleashed is a werewolf-as-body-horror film. However the unassuming star has to be the young pale girl called Ghost. Who calmly helps out the protagonists with disturbing skill, making among other things "Poly", an exploding polyester scarecrow, as well as subtly lying and scheming. She burned her grandmother alive and left her helpless in hospital, and convinced people it was a smoking accident. She also convinced the primary protagonist that the male nurse raped her, causing him to be left to a messy death; and finally, killed the sane responsible woman who comes in and tries to protect everybody from the slathering werewolves) to fulfill her ultimate goal: To be like her comic book heroine and have a pair of werewolves under her leash. Something which she seems well on the way to accomplishing. A masterpiece of low budget but skillfully acted creepiness.
The title child in The Good Son. He kills his 3-year old brother, shoots a dog with a nailgun, and tries to kill his same-aged cousin, 8-year old sister, and his own mother as well. The kid is played by Macaulay Culkin.
Particularly striking example in The Great New Wonderful (2005), where a troubled child is Really, Really Creepy.
At one point his parents defend him, despite deep down knowing it to be a galling lie: "I mean, deep down he's a good kid." "He's actually a great kid." Speaking as the stern but fair voice of reason, Mr. Peersall (Stephen Colbert), replies "No, he's actually a selfish, incorrigible monster with a heart made out of shit and splinters."
Young Michael Myers from Rob Zombie's retelling of Halloween is a very creepy child with an androgynous appearance who has a horrible family life, kills animals to take out his frustration, and after his mom isn't there to take him trick or treating he murders four people in his rampage. Later, at an asylum, it is shown he can't be trusted alone as he murders a nurse for saying that his baby sister is too cute to have come from such a family.
The original subverts this; despite him obviously being evil (he kills his sister at age 6 for no explainable reason other than she had sex, there wasn't even any indication of bullying) his face is quite angelic, if not adorable.
The 2009 movie The Hole (not to be confused with the Thora Birch movie of the same title) had an interesting take on this. The creepy little ghost girl had the face of a young woman about 17 years old - the age she would be now if she hadn't died as a child. It definitely contributed to the Uncanny Valley effect.
The children from The Innocents, the movie starring Deborah Kerr. No matter what the final explanation is, those kids are creepy.
The baby from It's Alive and the countless bad sequels does not fit the trope, as it lacks the superficial subtlety of the Creepy Child.
The eponymous star of Joshua, a 9-year-old genius, was rather disturbing to begin with, and only got creepier after the birth of his sister brought out the murderous, manipulative sociopath in him. It's a massively disturbing Evil Plan to be with his uncle, the only person who seems to really understand him.
Ju-Rei has one, since no Ju-on ripoff is complete without a pasty white ghost boy.
Silas, a Catholic school boy from the Adam Sandler movie Just Go With It, who constantly refers to Sandler's character as a "fornicator" and threatens to kill him. Sandler's character lampshades his creepiness several times, calling him Damien, Chucky, and Child of the Corn.
B.B from Kill Bill. Fits, since she is the daughter of The Bride and Bill, taken out of her mom's womb when she was in a coma and then raised by her Big Bad dad. In a subversion, B.B's not as creepy as she could've been: she's mostly a Cheerful Child, but one with rather... off-kilter thoughts. (e.g., she meets her mom via mock-pointing at her as if she had a gun and saying "Freeze, Mommy!", later happily tells her about a certain dead pet named Emilio...).
In Legion, a young boy is attacked by possessed people, and is saved by the main cast. Within seconds, they find out that the boy himself is possessed, suddenly sporting a blank stare and a digitally lowered voice.
Boy: Fooled you.
Rynn, the main character in The Little Girl Who Lives Down the Lane, is something of a creepy child, but the adults are creepier.
Thelma, the main character of Little Sweetheart, because she's a sociopath and a psychopath, and it shows in her interactions with people (and the fact that she watches B horror movies almost non-stop unless she's busy ruining someone's life or getting something she wants).
C.K. from the comedy film Madhouse is a destructive child who wants to do nothing more than kill things and blow stuff up. He states that his initials stand for either "Cat Killer" or "Confirmed Kills", and he is responsible for at least two of Scruffy the cat's deaths. Mark Lampshades his potentially dangerous actions and calls him a "psychotic little shit" at one point.
In Men In Black, the rigorous selection process for potential Men in Black recruits involves an exercise where recruits take aim at cardboard aliens in a shooting gallery. While many of the recruits, the "best of the best of the best" of America's military academies, unload their weapons into the mockup aliens, Will Smith's character James "Agent J" Edwards fires a single shot into the forehead of a cardboard cutout of a little girl. In the aftermath, Zed dryly asks J "why you felt little Tiffany deserved to die".
James: Well, first I was gonna pop this guy hanging from the street light. But then I realized, you know, he's just workin' out. How would I feel if somebody come runnin' in the gym bustin' me in my ass while I'm on a treadmill? Then I saw this snarling beast guy, then I noticed he had a tissue in his hand and I realized, he's not snarling, he's sneezing. Y'know, ain't no real threat there. Then I saw little Tiffany, and I'm thinkin', you know, "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 Zed! She's about eight years old; those books are way too advanced for her. If you ask me, I'd say she's up to something. And to be honest, I'd appreciate it if you eased up off my back about it. [beat] ...Or do I owe her an apology?
This is one of the factors that leads to James's induction into The Men in Black as Agent J. It's made even more explicit in the novelisation of the film, where Zed and K explain that, while fearsome-looking, the apparently vicious looking aliens are the intergalactic equivalent of small fluffy kittens, and that Tiffany was indeed the correct target.
The title character in Mikey seems to be a perfectly normal happy-go-lucky child, but he has a dark past: he murders his first adoptive family — including a five-year-old girl — because he feels they didn't love him, he covers up this first series of murders by blaming it on an intruder and pulls a convincing story, then begins the second set of murders by first killing his friend's older sister's cat and blaming it on her boyfriend whom he also later murders because he has a crush on her.
The unnamed little boy in Noroi The Curse. He follows his psychotic "mother" around, doesn't say a single word or make a single expression throughout the whole movie, and in the end it's heavily suggested that he's being possessed by Kagutaba.
The Reveal shows that this trope is subverted. Esther is actually a 33-year old woman with a child's body... who is completely Ax-Crazy.
In The Paperboy Johnny McFarley is one of these. We find out he hated his mother, and killed her. He feels bad about it, so he kills an old lady and lures her daughter to her house so she can be his new mother. He becomes very obsessed with her and her daughter Cammie, going as far as spying on them and placing a walkie-talkie inside their wall so he can listen to her conversations.
ParaNorman plays with this trope quite a bit. It's deconstructed throughout the film, peaking at adults willing to kill children because they're terrified of them. But then it's reconstructed.
In Poltergeist, the daughter (Carol Anne Freeling) of the... abnormally-afflicted family has a few scenes where she just creeps the shit out of you. The main example from the movie is thus:
Carol Anne: Theeeey're heeeere.
The Purge: The youngest Sandin child comes over as this, especially when asking why his parents don't go out and kill people.
Star Trek shows us Spock as a kid. We're used to green blood, utter lack of emotions, and an almost monotone voice...on an adult. Been there, seen that, buried the Red Shirt. But you've got to admit that on a kid, it's still way creepy.
Trick 'r Treat combines this with Magnificent Bastard in the form of Sam the trick 'r treater. It turns out that he cannot be killed, and isn't even remotely human. It's also strongly implied that he's actually Samhain, a Celtic god of death.
A lesser example would be Billy Wilkins, who is quite aware that his father is a Serial Killer and enjoys carving jack-o'-lanterns out of the heads of the dead.
Then there's Rhonda, an autistic girl who leaves her fellow trick-or-treaters to die at the hands of the school bus ghosts.
In X2: X-Men United, Jason Stryker, the son of Col. William Stryker, is a mutant with illusionist and mind probing powers who has been lobotomized by his father so that he follows his every word. When he tries to fool Charles Xavier into using Cerebro for him and Stryker, he creates a scenario in which he is represented as a young, slightly creepy girl who asks Xavier to look for all the mutants. The only thing letting on that they are one and the same is that they both share the same asymmetrical eyes.
David Sandborn in the 2007 horror movie Whisper.
In Who Can Kill a Child?, there is an island full of them, the creepiest of whom is a young mop haired boy who blankly stares off into the sunset while fishing with human remains. The most horrible thing the children do is hang an old man like a pinata and swipe at him with a scythe until they chop his head off. It's later explained that the children turned into psychopaths because of something in the air. We also see that they can manipulate other kids just by staring into their eyes.
Acheri, from Hell's Children, by Andrew Boland, is a creepy child who, despite having no eyes in her eye sockets, can still see you. And that’s just the tip of the iceberg.
Thomas Hardy's Jude the Obscure, in which the title character has a son so weird they don't seem to bother naming him, calling him "Little Father Time", due to being old beyond his years. He goes on to murder his step-siblings and then commit suicide because he believes that they and he are dragging Jude and Sue (first cousins, if the family wasn't odd enough) into even direr poverty, making him a damn sight less self-centered than most kids.
Alia in Dune, born with the knowledge and cunning of generations of Bene Gesserit ancestors. She was extremely creepy in David Lynch's film, very creepy in the Sci-Fi Channel adaptation, and only slightly less eerie in the original book.
Alia is also notable for being one of the few instances where we get to see what happens when the Creepy Child goes through puberty and then grows up. Needless to say, it turns out quite tragic.
In the David Lynch film, she was played by Alicia Roanne Witt, who had received a considerable amount of media attention at the age of three for her 200+ IQ.
Tom Riddle is shown to have been a Creepy Child in a Flashback. At the age of eleven he says to Dumbledore: "I can make bad things happen to people who annoy me. I can make them hurt if I want to." Apparently he also killed a fellow orphan's pet rabbit and hung it up where the boy would find it. The orphanage was not presumably a nice place to be—tight budget, overcrowding, lack of emotional nourishment or adult support of any kind—but doesn't seem to have been an Orphanage of Fear except for persons Riddle selected for his retribution.
Severus Snape had some decidedly creepy tendencies as a child: Watching other kids play from behind bushes (whether or not it was the beginning of a friendship, it's still Paranoia Fuel), and reportedly knowing more Dark curses at eleven years old than most of the seventh-years at Hogwarts. His personality as an adult is kind of like the grown-up version of this trope.
The classic representative of this trope: Rhoda Penmark of The Bad Seed.
Jonathan Lethem's novel Gun, with Occasional Music, features "babyheads", toddlers who have been genetically modified to possess adult-level intelligence. Unfortunately, they also have adult-level cynicism and bad habits.
Pet Sematary. Ye gods. Because normal creepy kids aren't enough for Stephen King, they have to be psycho zombie creepy kids.
H.P. Lovecraft's novella The Dunwich Horror involves a creepy child who appears to grow supernaturally quickly. By twelve, he is approximately seven feet tall, is badly in need of a shave, and has completely adult proportions. This is nothing compared to his brother.
Not a kid, but there's Psychopathic Manchild Jonathan Teatime from Hogfather. In the TV adaptation, he's very Wonka-ish, which only makes it worse. He's been like that since childhood, with the suggestion that as a child he may have murdered his parents, or at least watched them die. Even at the Assassin's Guild, kids know to keep away from people that freaky, a remark that becomes important in the climax.
Lord Downey is quoted as saying that when Teatime was taken in, "We took pity on him because he was an orphan. I think, in retrospect, we should have wondered a bit more about that."
Overlapping with Tykebomb is Coin from Sourcery, who quite calmly converts people into piles of ash or clouds of smoke without seeming to grasp that they're even dead. Is anything bad happening to him? Although Coin is spurred on and encouraged in this behavior by his Wizard's staff, which contains the soul of his insane father. Once freed from the staff's influence, he's a normal boy. (Or as normal as someone who can remake his local reality on a whim can be.)
Not all of it was his father's influence either. At the beginning of the book he creeped out the Grim Reaper.
Also, in Soul Music, we see that Susan very seriously freaked out her principal. Which is very understandable.
She's still at it later in life, although she's mostly learned to control it for her own ends.
Starting in Eldest, Inheritance Cycle has Elva. As a result of his "blessing", Eragon causes a one-year-old infant to mutate into a six-year-old who speaks with the voice of a world-weary adult and has Purple Eyes, becoming the empathic Elva. The other characters get really, really creeped out just hearing her speak.
Artemis Fowl, from the series of the same name, is the world's greatest criminal mastermind and 12 years old.
Also one of the few examples of a Creepy Child protagonist.
Literary/film example: the Stephen King short story "Children of the Corn" is based around a Town with a Dark Secret in which a bunch of creepy children have killed all of the adults, and sacrifice everyone to a vaguely Jesus-like entity called "He Who Walks Behind The Rows" when they turn nineteen.
In the postmodern novel House of Leaves, the character Will Navidson has two children named Chad and Daisy. As events in the book become more and more surreal, the children begin to act quite differently from their normal behavior, at several points becoming the Creepy Child.
A. N. Wilson's A Jealous Ghost contains two children, brother and sister, who are strangely shifty and reserved with the nanny. They like to sit quietly in their room after dinner. Said nanny begins to believe they are being corrupted by their mother's ghost: however, she is very much alive. Oh, and the nanny goes completely bonkers.
Ivy (aka The Archive) from The Dresden Files is a seven-year-old girl containing the entirety of human knowledge and understanding. She talks very calmly about matters of magic and vampires and stuff, and then completely upends the trope and reverts to normalcy somewhat when Dresden's cat Mister walks in. "Kitty!" As Kincaid, the hardened mercenary and a hundreds-of-years-old half-demon known as the Hound of Hell, who used to work for Dracula's father (who is described as the scion of a demon) put it, "Okay, that's just creepy". Dresden refers to her as "the scariest little girl on God's green earth."
The Age of Misrule features the Big Bad, Balor, at the end of book 3. He destroys whole pantheons... and he appears in the form of a Victorian private school boy. And then his face folds back so he can fire lasers at the heroes.
The Dexter novel Dexter in the Dark features his soon-to-be stepchildren Astor and Cody, who are definitely creepy and heading into Psychopathic Manchild territory (Astor being female doesn't seem to rule it out in her case.) No indication that Astor and Cody have been sent into creepy territory by their abusive dad has shown up in the TV series, though, and since the show diverted from the books starting with Season 2, it's no guarantee that the plot will show up there.
According to The Areas of My Expertise, The Virtuous Child is a creepy one parodying Puritanical values. See the page on Glurge. There's also the child prodigies.
Basically, it comes down to this: Child prodigies are fine, but you could do without the violins. If you have ever been alone at night in Penn Station, barefoot, with only a sword cane and a half-empty bottle of brandy, and suddenly, swiftly, with ninja-like stealth, a group of child prodigies surrounds you, rattling their violin cases, you will know what we're talking about.
The Malazan Book of the Fallen series is full of unnerving Oracular Urchin types, with Kettle taking the cake. From the constant hints that she's Not Quite Human (leaving aside that she's actually an undead coming back to life) to her matter-of-fact revelations of things "the dead told her" to the vaguely annoyed way she tells Fear Sengar that she'd been raped by the slavers they'd just rescued her from... She unnerves the guy who can turn into a giant dragon.
Twins Jane and Alec from the Twilight series. Jane can make people writhe from extreme agony, and Alec can make people feel absolutely nothing. Every other vampire that knows about them is at least slightly scared by them (except Aro). Despite their childish appearance, they're both several hundred years old.
Jane is played by Dakota Fanning (who is decidedly less creepy now that she's mini-Gwyneth Paltrow)
The main character, Will Stanton, from The Dark Is Rising, in his aspect as an Old One. The rest of the time he seems like a perfectly normal boy.
Spider Robinson probably did not intendJake Stonebender's supersupergenius daughter Erin to be a Creepy Child. But I defy you not to be creeped out, or at least Squicked, when at the age of fourteen MONTHS she responds to a compliment with "Why, Uncle Nicky, what a sweet thing to say! I'm going to start fucking when I'm sixteen, would you like to take a number? I can work you into the single digits if you hurry."
The "nudnik" (human, in mouse slang) child in House of Tribes captures mice and other small animals to dissect, and feeds the remains to his pet mouse. Even from the point of view of a human, this is Squicky, and from the point of view of the mouse main character it's positively horrifying.
The title character of Lionel Shriver's We Need to Talk about Kevin certainly qualifies.
The title character of Ray Bradbury's short story The Small Assassin — who is a baby.
Avoided in Good Omens: Adam Young, despite being the Antichrist, is a thoroughly normal child due to the lack of any angelic or demonic influence in his upbringing.
Miles and Flora in Henry James' The Turn of the Screw. First, they look very cute and innocent... later, not so much. The story very much relies on readers' interpretation of the event and the narrator. In both variants they come off as creepy. Either they are unusually, disturbingly well-behaved and non-childlike, or they are corrupted by wicked servants and downright possessed by the evil.
Henry/Emperor Kirwan of Draco, the wonderfully creepy hero of an all-but-forgotten short story called Child's Play, by Mary-Alice Schnirring. 20 years before D&D existed, Schnirring came up with the idea of kids organizing and playing about an ancient empire and its adventures and vicissitudes entirely on paper. Turns out the kingdom really exists, as does the horrifyingly undescribed monster in the swamp. Bye-bye, obnoxious cousin Charlie! Glug, glug....
While we're at it, Jane Rice's Idol of the Flies, a classic about a sweet-faced kid who, let's see... killed his parents, making it look like an accident, nearly does the same to his aunt, and tortures animals, among other things, many of which involve lots and lots of flies.
Rosamond from the Nate The Great series — she is not malevolent, but with her gothy appearance and her six black cats, she is extremely strange. Also her spiritual successor, product mascot Emily The Strange.
Colonel Aureliano Buendía from One Hundred Years of Solitude was one of these as a kid. When his mom Ursula was pregnant with him, he cried in her womb. When he was born, he didn't cry and only stared at the ceiling. As a three year old, he told Ursula that a jar placed in the middle of a table would fall, and it moved to a side until it fell. . .
One of the 17 Aurelianos note the 17 illegitimate sons of the aforementioned Colonel, all named after him also was like this. He was a girly-looking little boy with long hair and Ice Blue Eyes who creeped the shit out of Ursula and Amaranta when he and his mother came to meet them because he showed no shyness around them, walked around the house as if he had been born there, and then asked them for an old toy that he had never ever seen and somehow he knew that they had it.
The childhood antics of Jose Arcadio Segundo and Aureliano Segundo make them border on Creepy Twins. Who may or may have not performed a permanentTwin Switch as kids.
Although Fiona McDonald in The Highland Twins at the Chalet School is a nice enough girl and not physically frail enough to be a true Waif Prophet, she has visions which unnerve her family - for instance, when she 'sees' her father die, and later, when she 'sees' her brother's plane crashing and he is later confirmed dead. However, she also uses her ability to prove to Joey that Jack, who has been reported drowned, is actually alive.
Interview with the Vampire's Claudia. A vampire who lures her victims to her by ways of sympathy. She's a 50-70 year old woman in the body of a five-year-old girl (and plays up the innocent girl look a lot.) She then 'kills' Lestat by stabbing him repeatedly after she poisons him. Then proceeds to nearly burn their house down.
Roger from Lord of the Flies starts out as a very creepy loner kid. At first, his antics are merely pranks such as taunting, throwing rocks at the smallest kids and kicking down their sand castles. Near the middle, he has become more sadistic and violent and soon becomes the torturer of the group. By the end, he becomes a complete psychopath when he kills Piggy by dropping a boulder on his head. Later, we find out he intends to kill Ralph and mount his head on a pike like he and Jack had done to a pig earlier.
Subverted in the Doctor WhoEighth Doctor Adventures novel The Blue Angel: its alternate reality, theoretically human version of the Doctor "could talk from birth." You know you're scared of the talking newborn, but there's no indication he did anything else that was creepy, and his mother just saw him as unusual and precocious. And played to the hilt in Timeless, in which a little blond girl, possibly older than she looks, and who has crooked eyes and a little dolly, appears where she shouldn't, plays around with the multiverse, gets people killed, knows things she shouldn't, and just acts creepy.
Before The Exorcist, but (mostly) after Rosemary's Baby, some of the best of these stories were anthologized into books: Little Monsters, More Little Monsters, Demonkind and Young Demons. An even earlier collection is called Outsiders, Children of Wonder.
The primary Vord Queen in the Codex Alera series looks like an adult, but she has a number of disturbingly childlike tendencies, such as collecting a group of Alerans into a "dollhouse" where she watches them live and work - and when Tavi rescues them, the Queen goes absolutely berserk. Later on there are a few other scenes that cement the childlike nature of the Queen, including asking innocent questions about simple things she doesn't understand, i.e. expressions of love and affection, and one poignant scene where she cpnfesses to Isana that she only wants her Vord children to survive, like any mother should. This is also a creature that is incredibly fast and powerful and durable, and is trying to wipe humanity off the face of the planet.
Baby Veil in Outcast of Redwall was pretty unnerving. When anyone tried to pick him up, he bit them and happily licked up their blood. He grew up into a common-or-garden delinquent, which was actually something of a relief. Until the poisoning incident, anyway.
Arya Stark in A Song of Ice and Fire starts out as a standard-issue 9-year-old Tomboy. By the time she's 10, she's committing premeditated murder and reciting a nightly list of the people she plans on killing.
She also copes with being deliberately blinded albeit temporarily with disturbing calmness—and refuses to ask to have her eyesight restored because that would be the end of her training to be an assassin.
Jodi Picoult's novel Salem Falls has Gillain Duncan. Although technically a teenager at the time of the novel, she still fits this trope to a T, and it's stated from a former therapist of hers that she was just as disturbed when she actually was a child. Picoult herself has described Gillain as one of the creepiest teenage girls she's ever come across in fiction.
In The Pale King, Mr. Manshardt's infant has a terrifying expression on its face and the body language of an adult. It can also talk, though the person who heard it may be insane.
The Baby from Remnants. It looks like a somewhat creepy two-year-old child, but seems to have some bizarre intelligence and psychic control over its mother, who gave birth to it while in suspending animation for 500 years. It turns out in reality, the Baby is a Shipwright in disguise.
Then there is Harelip, the twin's neighbor who is only sightly older then them and well.. let's just say she has a lot more sexual issues then a young girl should.
Willie Connolly in J.R. Lowell's Daughter of Darkness. She's such a perfect, perfect little girl... and such a nice high IQ too! Her dad must be awful proud... gee, isn't it too bad her mommy killed herself? Aw, isn't that cute, she collects dolls...
All the Dollanganger children in Flowers in the Attic would count. Later, Bart Foxworth in If There Be Thorns.
Sylvia Adare in My Sweet Audrina
Richard and Melanie Cutler in the Cutler series. They not only bathe together (at age twelve) and share the same toothbrush, but Richard does everything he can to get nine-year-old Jefferson in trouble, destroys Christie's piano, they both play up their being sick in one scene to get their cousins and nanny in as much trouble as possible, and after Christie and Jefferson are returned to the house after running away, Christie sees the twins have ripped her clothes to ribbons, mixed all her cosmetics and perfumes together, destroyed her belongings, Richard laughs at her through the keyhole and tells her to jump out the window...and in their last scene, Richard calmly tells Christie that their mother said the hospitalized Jefferson will die. His sister just stares at Christie, "like some coldly analytical scientist" to see what her reaction will be. It's kinda satisfying when Christie responds by throwing their hot soup in their laps...
Tash Arranda of Galaxy of Fear shows flashes of this from time to time. She's an untrained Force-Sensitive and tends to finish too many sentences that other people start, make too many accurate predictions, and just in general knows things she shouldn't for a lot of people who spend much time around her to feel comfortable. Since she's one of the viewpoint characters, we see that most of the time she's not even aware if she's being creepy.
The Kingdom and the Crown has the eldest grandchild of David ben Joseph, Esther, who is referred to by her family as their enigmatic little sphinx.
In Andre Norton's Dread Companion, Bartare. Kilda's original impression is confirmed when Bartare knows her father is dead before she is told, and it develops from there.
Coira in White as Snow, who scares her nursemaid by refusing to talk for long stretches at a time.
Ivy Carson, in Zilpha Keatley Snyder's The Changeling, is not really creepy, but Martha's family feels "there's a strangeness about her" that they dislike. The author leaves it ambiguous whether this is due to Ivy's appearance, her intimate knowledge of esoterism or that she really is a Changeling.
Two of the creepiest girls ever seen on TV were in the Law & Order episode "Killerz," which was Green's second case. The older one had a strange look and behaved in a way that just seemed off, however she was innocent and the way she acted made sense after you found out what her little friend had done. The younger girl at first seemed like a Cheerful Child that was better adjusted then the older one, however it turned out she Does Not Like Men and was a sociopathic Serial Killer of little boys. What makes her especially scary is that despite Dr. Skoda's diagnosis Dr. Olivet actually defended the Enfant Terrible and was able to get her off. As she was leaving we see the murderess eyeing her next victim: a very scared little boy.
In the first episode of the series's ninth season (and the debut one of Angie Harmon as Abby Carmichael), a rich couple's 7-year-old very disturbed adoptive kid was accused of killing his also adoptive baby sister. He didn't.
A 13-year-old sociopath kills his younger neighbor in the Law And Order Special Victims Unit episode "Conscience".
Elle Fanning played a creepy/disturbed kid in the Law And Order Special Victims Unit episode "Cage". Detective Dani Beck takes home the little girl who was from an abusive foster home. That night the girl wakes her up because she can't sleep, and Beck finds the girl has set fire to the curtains in an attempt to kill them both so they can be together.
In the mid-2000s a creepy little girl appeared on several shows including CSI: Crime Scene Investigation, Law & Order: Special Victims Unit, Close To Home and The Inside. Despite going by different names and having different mothers on each of them, she always acted the same and was always played by the same actress Jennette McCurdy (who later went to iCarly). She would always pretend to be a Cheerful Child that just happened to have overheard or seen damming evidence against a person that implicated them as a murderer; however it always turns out that the little bitch was lying to them and the person she claims did it was completely innocent, just convenient patsies which were easy to frame. After proving her story was bull the police would confront her about it and she would try to blame somebody else. About half the time it wouldn't work, and they exposed her as the Enfant Terrible she really was. The other half they went after the second person she blamed for the crime and arrested them not even suspecting that the little girl was actually a murderess.
Ari Graynor was on an episode where her younger sister was shot in a video store robbery. Then we learned she arranged for the sister to be molested and then killed to prevent her talking. The explanation was that she was an abused child and a total sociopath. When they got her she said "You think I'm scared of the death penalty? You can't kill me - I'm already dead." Brrr.
Buffy the Vampire Slayer had The Anointed One. In a typical Joss Whedon moment, however, when Spike shows up he takes "The Annoying One" down within an episode. (According to rumour, he was killed off because the actor was growing too rapidly for a dead kid.)
"Gingerbread" features two murdered children (later revealed to be Hansel and Gretel themselves) who appear as ghosts and force the Brainwashed and Crazy town to try to kill Willow, Buffy and Amy.
"Hush" opens with Buffy dreaming of a spooky little girl, complete with the nursery tune. What makes the girl spookier is that she looks like a kid-version of Buffy.
Wolfram & Hart's conduit to the Senior Partners in Angel was a little girl. And she was also the dark reincarnation of Ra, representing the sun at sunset and the evil of humanity.
There is also an episode revolving around a creepy child possessed by a demon that corrupted the souls of those it possessed. When they exorcised the demon they learned that it hadn't been controlling him, but had possessed him and been trapped inside by the soulless child.
The unnamed schoolgirl in the serial "Remembrance of the Daleks"who is eventually revealed to be the Renegade Daleks' living battle computer and is able to shoot lightning from her hands.
The more recent series two-parter "Human Nature"/"The Family of Blood" involved one of these as well, who always carried a bright red balloon. It never popped. Odd. Most likely a reference to the original book, in which the little girl's balloon behaved like Rover. When either girl appeared on screen, they also had the same Ironic Nursery Tune. And what happens to her in the end will make you afraid to look in mirrors.
Chloe Webber of "Fear Her" is a rare example of a black Creepy Child.
Doctor Who Magazine comic strip "Ghosts of the Northern Line" has Monster of the Week Mnemosyne take on the form of a little girl ghost, who at one point stands on the tracks in front of a tube train, prompting the driver to slam the brakes on - giving the other ghosts time to feed on the living.
8-year-old Master. Russell T. Davies noted in the script that the child should be "Damien-like". Keep in mind we only see him for a very brief scene as he looks into the Time Vortex. Kudos to the actor, managing to creep us out with a few seconds of standing there looking at the camera, no lines spoken or actions taken.
And in Children of Earth, every child on the planet becomes this when when they freeze and speak in unison.
In a deliberately creepy moment, the two daughters of the minister turn to him and start saying, in unison, "We want a pony. We want a pony."
Yandere Rhonda Vollmer on Big Love is a non-supernatural variant: behind her artless demeanor and expressionless blue eyes lurks the brain of a baby sociopath and master-manipulator-in-training (and a disturbing fondness for rhinestones). She's got something of an excuse, having been raised in an abusive cult and married off at the age of fourteen to a man in his seventies, but it doesn't do much to make her less terrifying. (Amusingly, she's played by Daveigh Chase, who portrayed the ultimate Creepy Child in the American version of The Ring.)
Anthony Fremont from The Twilight Zone episode "It's a Good Life" is omnipotent. He's no more evil than any other three-year-old who's never been told "No" in his life, but his ignorance, capriciousness, and lack of empathy holds Peakville, Ohio in complete terror.
The sequel in the 2000 remake features Anthony's daughter, who is able to bring back everything her father "sent away".
Supernatural is in love with the Creepy Child. The very first episode has a creepy brother and sister, "The Benders" has a thirteen year old cannibal named Missy, "Playthings" has a creepy girl ghost manipulating the daughter of the owner of an inn, "All Hell Breaks Loose Part 1" has an Acheri demon appear as a little girl◊, "The Kids are All Right" has changeling children feeding off mothers' synovial fluid, "Are You There, God? It's Me, Dean Winchester" has two little girls terrorizing Bobby and "Jus in Bello" has the new Big Bad Lilith in the form of a small child◊, who is pure terror and decided that the Creepy Child was so nice, she did it twice◊ (She was played by Sierra McCormick, who later played a similar but G-rated version of her, Jessie's "Creepy" Connie). Season Four's "The Rapture" has Claire Novak possessed by the angel Castiel informing Castiel's previous host (Claire's father Jimmy) that his (Jimmy's) work on Earth is done while poor Jimmy begs to be possessed instead.
The episode "Family Remains" has this in the form of a feral, in-bred child and her brother who torment a new family that moves into their house.
Though it's played straight then that same child returns several years later in "Season's Beatings" and that time he really IS the anti-christ.
Lampshaded in the season five episode "The Real Ghostbusters": "Oh look, more creepy children brought to you by Supernatural."
While not creepy in a supernatural sense, Insufferable Genius Hannah from a two episode "arc" of CSI: Crime Scene Investigation definitely qualifies. In her first episode she helps get her brother out of a murder conviction by convincing the jury that she did it, while gaining CSI Sara Sidle's sympathy (she was also a gifted child), only to smugly reveal to her that her brother did indeed set up the prank and that she's going to get a lot of book deals once she's out of juvie. In her second episode the two siblings are in college (their parents are mysteriously dead), with the brother as a student and Hannah as his professor. Several plot twists and one Breaking Speech at Sara later, it is revealed that Hannah had begun to envy of her brother's growing independence and framed him for murder in order to put him in jail, under her control and at her side forever. Her brother could no longer stand his sister's truth-destroying plans and killed himself and "arresting officer" Sara was simply disgusted, which probably contributed to her eventual two season leave of absence.
La Femme Nikita: In the episode "He Came From Four," a creepy child with telepathic and telekinetic abilities is sent to Section One to assist in a mission.
The X-Files had a bunch of creepy children, all very disturbing.
Among the most iconic are Eves 9 and 10 in "Eve". They are look-alike cloned girls with super strength, super intelligence and murderous tendencies.
Michelle (Andrea Libman) from "Born Again" was reincarnation of a murdered cop and she was channelling his desire for revenge. Even her mother was scared of her. During therapy sessions, she kept disfiguring dolls in exactly the same way, always gauging out one eye and cutting one arm. This was how Charlie Morris's body had been mutilated to make it look like a signature execution.
In "The Calusari", we have troubled Charlie who is very un-child-like. Much more evil Michael who is his deceased twin. His presence killed his baby brother, father and grandmother... And he was about to murder a few more people, including Scully. His actor was pretty impressive.
Polly, a girl with a Creepy Doll in "Chinga" (an episode written by Stephen King). She's an autistic girl, but the creepiness comes mainly from the doll.
The army of small identical children, dark-haired girls and blond boys, in "Herrenvolk" have no language and just keep staring blankly at people. They were created to work as drones in a secret government project with genetically changed corn and bees. To creep and psyche Agent Mulder out even more, the girl drones look exactly like his little sister Samantha who was abducted as a child. The situation implies that her DNA was used in said project.
Gibson Praise who appeared in some Myth Arc episodes (e.g. "The End", "The Beginning", "Within", "Without", "The Truth"). He can read people's minds and at his first appearance, he avoided death by ducking. The man who died was shot right in front of him, but does he show the slightest bit of worry or fear, not just that someone was killed right in front of him, but that he was the intended target? Nuh-uh. He is also completely devoid of emotion at all other times and has no issue with pointing out how cruel and heartless people are.
Billy Underwood in "Invocation".
William could qualify as creepy too, if he wasn't intimately connected with Mulder and Scully. After all, he is/was genetically alien and had a habit of moving things with his mind. But he's just so darn cute.
Tommy Conlon from "Scary Monsters", who appears to be harassed by monsters, but it turns out that he was the cause of all the strange occurrences by conjuring them up in his imagination, causing several people to kill themselves.
Susperia in "Cold Fire", being an incredibly powerful alien from another plane of existence who is trying to get Revenge on Voyager—and takes the appearance of a little girl.
The Borg children on their first appearance, being Borg.
A nightmare version of Naomi Wildman (usually an ordinary nice kid) in "Dark Frontier."
Kes, kind of, being physically adult but very innocent (thanks to her species' culture and Bizarre Alien Biology) sweet, and understanding. Except for a couple of times when her latent psychic powers get a little scary.
Worf was the first to discover the "imaginary friend come to life" when he ran into her and the little girl on a security patrol.
Oscar from The Sarah Jane Adventures episode "The Temptation Of Sarah Jane Smith". At the end of Part One he turns out to be a Graske in disguise.
Ally from episode two of Demons who kidnaps children for Gilgamel.
Walt on LOST generally seems like a normal kid, but also has the habits of appearing in places he shouldn't be, knowing the future, and smacking birds into nearby windows. He manages to creep out his stepfather to the point of relinquishing custody. Then in season 2, he scares the Others enough that they give him back to his father.
Ben Linus was not only creepy as an adult...
Madison from Harper's Island. She tends to creep out her mother late at night by waking her up and telling her everyone is going to die.
Dotty/Kirsty Cotton from Eastenders. She was a little girl of no older than nine or so, seemingly dumped on her grandmother Dot by her criminal father Nick. At first she seemed saccharine sweet, but it soon became clear that something was wrong. Her hymn-singing, baking, little 1930's cardies and general innocence took her beyond the realms of 'normal but goody-two-shoes kid' and into the realms of creepy. You could tell she had to be hiding something - and she was. Turned out she had a pact with her Father Nick to kill Dot for her money, and it didn't seem like she was being threatened by him or otherwise coerced into it; she appeared to be doing it willingly, off her own back. She pressed on with this plan until the last minute, when she got cold feet and attempted to drug Nick instead. Nick survived, but as he left he shouted not to be fooled by Dotty's traumatised tears: she was rotten to the core and the plan to kill Dot had been all her idea. It sounded like a bitter rant, but this is Eastenders we're talking about, so there will almost definitely turn out to be some truth to his words.
The entire X7 series from Dark Angel. Scary mute child soldiers, with a unit hive-mind, the ability to communicate with each other ultra-sonically and freaky goddamn black eyes. The X8 series, however, seems to be identical to the X5 and X6 series, bizarrely.
It was mentioned in the novels that finish the film that after the experiments became stable (X5) each series was designed for specific goals in mind. The X5's are boosted with feline DNA and were used as commandos. The X6 are similar but either due to genetics or training are much less independent. The X7 seemed to have been designed to work as squads, given their abilities they were most likely meant for a more straight forward attack style. The X8 were never shown in combat (only one was seen on the show), maybe the X7's scared the military or they only needed one group with those specific abilities? There's also the anomalies, failures that were occasionally used for very specific goals (lizard man Mole apparently helped kill Saddam while a blue guy he argued with was involved in some mission in the arctic)
River in Firefly can approach this at times, though usually her Woobie-ness overrides the creepy elements. She's also somewhat older than the typical Creepy Child, though her behaviour tends to be very childlike.
Both lampshaded and played straight in Stephen King's four part movie Rose Red: There's the classic and indeed creepy ghost girl April and then there's Annie Wheaton, one of the team of explorers in the haunted house. She's mostly a sympathetic character but slightly creepy due to being autistic screen as well as, among other things, telekinetic. At one point another (much less sympathetic) explorer calls her "that creepy child with that creepy doll". By the way, both Annie and April have their own theme music, but Annie (whose theme is a rather nice big band song) soon picks up April's creepy nursery rhyme theme.
Dexter was one of these as a child, killing animals and getting though a psych test only by answering the opposite to what was true.
Shane Botwin in Weeds is an interesting case — viewers get to observe the evolution of a Creepy Child, from "slightly affected by seeing his father die" to "13-year-old violent drug dealer and murderer", over the course of five seasons. It's anyone's guess where he'll go in season six...
Millennium has Jordan Black, Frank's younger daughter. She has power's similar to Frank's except the manifest themselves as metaphorical dreams.
The Closer has Skander Marku from the Season 6 Christmas two-parter, who acts unnaturally calm and almost smug amidst his whole family ending up dead. He appears to care more about his dog than the fact that his home is a crime scene, smirks at the cops when his (newly-met) aunt and uncle take him home, and when arrested, makes up a patently false story of how the arresting officer tied him up and threatened him. Subverted in the second half; when he's told that all the family he knew about had been killed, he breaks down crying. His odd behavior at the police station was most likely due to his family's mistrust of the police; he acts more like a normal child after he realizes that the police are trying to protect him.
Alicia, from the Spanish series Los Protegidos. If you know Spanish you should shit bricks
Sunny Capaduca from 15/Love was a scary little girl with a heavy—nearly untraceable—accent, Jerk Jock and Manipulative Bitch tendencies, and a liking for frightening the other (much older) kids at the school. She stopped just short of being an Enfante Terrible.
When he returns in season 4, the first thing he does upon meeting Sansa is to bring up her family's horrible deaths at the Red Wedding, in a tone that would be better suited a discussion of the weather. He maintains the same calm demeanor when explaining that his own father was poisoned.
By Season 3, Arya Stark is starting to become a Creepy Child in her own right, declaring Death as her one true god and murdering an Asshole Victim in cold blood without a hint of fear or guilt.
The Mentalist has Haley in the 4th season episode "Red Rover, Red Rover" who approaches Jane in the middle of a cemetery to deliver him a message from Red John.
She's redeemed of creepiness though, when it turns out she was lured there and had no idea she was acting as messenger for a deranged serial killer.
Jam featured a sketch about a six-year-old hired "cleaner"/killer, Maria. She looks like an adorable little girl but carries a gun, swears continually and is very proficient in chopping up bodies. When one of them turns out not to be dead, she shoots him in the head and then carries on cutting him up. The radio series featured even more sketches about Maria, in which she was only four years old, and was revealed (among other things) to have a penchant for killing farm animals.
In The Walking Dead, Carl is turning into one of these. Justified, because he is growing up during a Zombie Apocalypse. First, he is forced to shoot his mother in the head after she dies, to prevent her from turning into a walker. Then he kills a child soldier from Woodbury in cold blood during the ambush on the prison.
Chip Chambers from iCarly. He's a vicious kid and extremely loyal to his older brother, Chuck. When Spencer sends Chuck to military school for ambushing him, Chip mercilessly takes his anger out on Spencer... and the kid is only 9 years old.
In Person of Interest, a flashback shows the death of Shaw's father in a car accident when she was a child. The firefighter tries to explain that he's fallen asleep and will never wake up, to which Shaw calmly responds he means "dead". She then calmly asks for a sandwich as she's feeling hungry.
Bill Adama from Caprica was going to be like this. Apparently naming someone after their dead older brother is a bad idea.
The little girl in the video for Skrillex's "First of the Year"  looks super-creepy but less scary than the usual because it's implied that she only lures child molesters into the abandoned car park to be killed by a demon she controls
The album cover for They Might Be Giants' John Henry... You try looking at a girl staring blankly with a pickaxe in her hands and not have the jibblies...
The music video by OOMPH! - "Augen Auf" features a birthday party where the Adults are innocent, but the Children are the ones with more devious intent.
All of the children in the Vocaloid song "Circle You, Circle You". It comes off as more sad than anything when you realize that they are living in an Orphanage of Fear and have been horrifically experimented on in order for some Mad Scientists to (successfully) discover the secret to immortality. Said scientists would force the children to play the Japanese children's game "Kagome, Kagome" and then cut offalimb whenever they lost. The children play this game with wayward visitors even after the scientists are long dead, making the song a good case of horror all the same.
The Old World of Darkness game Wraith: The Oblivion has "Striplings", a title given to Spectres (evil ghosts of Oblivion) who died before the age of ten and have corpuses (ghost bodies) resembling children. They exist among all of the Spectral castes (including at least one Malfean, the God-Kings of Oblivion) and form a society unto themselves. Other Spectres (even Malfeans) find them to be completely ungovernable and "creepy".
The short-lived Immortal RPG featured the Peri, youngsters rescued from the Children's Crusade and made into immortals whose talent is to transform their bodies into weapons. The game's soundtrack had a bit with the sound of someone being stabbed, followed by a childish voice saying, "G'night!" and giggling. Worth noting is that Immortal has been revived as a free RPG, available here, although the Creepy Children described have been retconned into being just part of the Peri as of the current edition; many of the others are still Creepy Children, though, just from different origins.
The card game Lunch Money features monochrome pictures of a young girl with nursery rhymes and other sayings having vaguely to do with the cards intended effect. The artwork is fairly sureal, but becomes truly creepy when one considers that the cards represent the characters actions in a brutal street fight (i.e. Punches, Kicks, hitting a guy with a chain, etc.).
In the French game In Nomine Satanis / Magna Veritas (the English version isn't a straight adaptation, more a remake) children of a demon and a human can be either normal kids, demons, or official creepy children. I love the illustration on that chapter in the rulebook.
Malifaux being Malifaux, this pops up several times. The main contenders are from the Neverborn: Candy is the Woe of Innocence Lost, who takes the form of a small girl with pigtails and a basket of (poisoned) sweets; Baby Kade is a wild eyed baby with a knife and a penchant for killer teddies. There are also more sympathetic examples, The Stolen are Lost Boys-style pre-teen boys lured into The Breach and used ruthlessly as meat shields or sources of power.
In some productions, the demons/witches that deliver the misleading prophecies to Macbeth take this form.
Rosmersholm by Henrik Ibsen. The Rosmer family has a tendency to breed children that neither laughed nor wept. And they seem to haunt the Rosmersholm estate.
At the Universal Studios' Halloween Horror Nights event, one of their mascot characters Cindy is the most famous example. Creepy children doing creepy things is a recurring haunted house and scarezone theme. However, due to the events' mature focus and casting requirements, the children are often portrayed by small/younger looking adults and usually wear masks or makeup.
Alma Wade isn't the villain of a video game named F.E.A.R. for nothing. Every... single... time she appears... is so creepy it'll make you scream and jump. And you can't shoot her, since she's a freaking ghost!! And it gets worse when she grows up...
In Arx Fatalis, there is only one child in the only city explored in the game. There's nothing special about her appearance or clothes, but she has this soft-spoken voice, which when combined with outdated graphics(expressionless, pixelated facial features), simply makes your skin crawl.
The Little Sisters from Bioshock are little girls of about five to six years' age who have been turned into living depositories for ADAM, the game's genetic Applied Phlebotinum. Their bodyguards, the hulking and homicidally protective Big Daddies, are scary enough, but a pallid little girl with a syringe on her arm who takes a childishly cavalier approach to sucking vital fluids out of dead bodies is on a whole 'nother level of horrifying.
The worst part, though, is how lifelike they are if you stop to watch. Considering that you're expected to kill their bodyguards for powerups and have the option to kill them for more.
The creep factor is being significantly reduced for BioShock 2... because you're one of their bodyguards. Through his eyes, they're adorable.
"Look, Mr. Bubbles, an angel! - Wait - he's still breathing. It's all right. I know he'll be an angel soon..."
Sally, from the "Mothership Zeta" add-on to Fallout 3. She's a young alien captive who has been held in since before the nuclear war. She crawls around the air vents giving you information and opening doors for you. She knows way too much, you can see her One-Winged Angel form coming from a mile away...Except it never comes! She dosn't even try to backstab you, she is a fullly dedicated ally. Not actually that bad if you take this as a relief, but she also seems very nonchalant about the very evident death of her family and most of the world.
Betty, from the "Tranquility Lane" quest. The avatar of the sinister Stanislaus Braun in a twisted simulation of the 50s-esque world of pre-war 2077 who has spent decades torturing, tormenting, and toying with the other inhabitants.
Silent Hill has practically an orphanage full of creepy children (and an actual orphanage is mentioned/visited in the 3rd and 4th games): Cheryl (renamed "Sharon" in the movie), Alessa, the demon children "Mumblers" in the school level, "Lil' Walter" from the 4th game, to some extent Heather in the 3rd (she might be too old, however), and Laura in the 2nd (though she was more bratty than creepy, and her creepyness was born more out of obliviousness than genuine hostility. Which isn't to say she wasn't, she just wasn't able to perceive the monsters).
A unique example would be Ridley from Metroid: Other M, who first appears as an adorable, fluffy chicken-rabbit-thing. He is seen again, simply staring at Samus with the most frightenting look ever. He is then seen again growling and consuming a corpse, only stopping to hiss at Samus
Pharos from Persona 3. And the fact that he just wants to be best friends forever... Isn't. Helping.
In addition comes the fact that his Social Link is the Death Arcana, in a game in which Tarot Motifs are good clues to a character's nature.
Did we mention that he likes suddenly showing up in your room in the middle of the night? Because he does that. A lot.
Alice is a recurring character. She happens to be a Humanoid Abomination with the mind of a young child, massive magical powers and a disturbing lack of understanding on why, exactly, she shouldn't kill/eat/drain to death/feed to the darkness/necromantically revive people who want to be her friends. She has a lot of magical potential and is not averse to invoke Night of the Living Mooks as a valid tactic. All this while still retaining her innocence and Lack of Empathy.
Shin Megami Tensei III: Nocturne has the hero routinely followed by a silent young boy and his apparent nanny. The boy stands silent with his creepy pallid skin, piercing gaze, and blonde locks, while his caregiver speaks for him. That ain't no child, but a powerful fallen angel trying to groom the hero to be a Messiah for all demonkind to lead them in their battle against God. Nothing too complicated, really.
Clock Tower: The First Fear has Bobby, a ten year old with giant scissors who chases the main character around trying to kill her. His face is grey and badly deformed. And there's also his giant, purple, severely deformed brother Dan.
"Princess" Agitha from The Legend of Zelda: Twilight Princess is a girl aged about 10, who lives alone in a "castle" that is more like a giant terrarium, dresses like a Elegant Gothic Lolita, and is obsessed with bugs. She tasks Link with catching golden bugs so she can put on a Bug Ball, and while she is very sweet and polite about it all, she expresses wishes concerning said bugs that range from the perfectly innocent ("I want to tie ribbons on your antennae!") to the utterly squicky ("I want to bathe in your slime!"). All this combined with the lack of any parental figures has led to some speculation about their fate.
The fact that she lives alone may actually imply that she's older than she looks. This makes her even creepier.
To make this even creepier, if you try to leave without selling any bugs to her, on your way out she says, "I know you have bugs..."
She... she growls...
Twilight Princess also has Malo. Perhaps the reason he becomes an insanely successful business entrepreneur (before the age of 8, I might add) is because everyone does what he tells them to just to get away from his blank, soulless expression, and the fact that his voice almost sounds like that of a grown man really doesn't help.
The little Kokiri girl you meet in The Lost Woods as an adultnote a.k.a. Fado, the first of three characters to bear the name, right after the depressed mannote a.k.a. Grog disappears. It's her utter deadpan and the fact that we never do get any further explanation.
"That guy isn't here anymore. Anybody who comes into the forest will be lost. Everybody will become a Stalfos. Everybody, Stalfos. So, he's not here anymore. Only his saw is left. Hee hee." The conversation finishes with: "Heh heh heh. Are you going to be... too? Heh heh!"
And she is right. In Twilight Princess, set about 100 years after Ocarina of Time, you are trained in sword tecniques by the Hero's Shade, the embodiment of Oo T-Link's regrets. The shape of the Shade? A Stalfos.
Some of the creepiest children in the series are the ones that are inside the moon from The Legend of Zelda: Majora's Mask, because they are wearing the masks of all the bosses you have killed. Especially the child wearing Majora's Mask, which is sitting all alone under a tree, staring into space. This is all completely unexplained. Some of the lines they say are pretty unnerving:
Twinmold Child: "Heh, heh... Thanks... You're nice. Umm... Can I ask... a question? Your true face... What kind of... face is it? I wonder... The face under the mask... Is that... your true face?"
Majora Child (right before you fight it): "Do you want to play with me? OK, let's play good guys and bad guys... I'll be the good guy, and you be the bad guy..."
The Moon Children all share a distinct semblance to a man who is easily the most terrifying and intimidating character in the whole series. Yes, that's right, it's The Happy Mask Salesman. Capable of changing position without ever moving, scary when he finds out you didn't get his mask, oh, and when you fail and the moon destroys all of Termina? HE STILL COMES AFTER YOU.
If you look closely while you're forking over your masks to them, you'll see that Link is backing away slightly each time...
The questions they ask (recalling the story of the Skull Kid and the Four Giants) suggest that they're all part of the Skull Kid.
Annie from League of Legends, in addition to looking rather creepy, she can cast advanced magic and animate her toy bear to ravage enemies.
Said murderous teddy bear is actually a real live demon bear that she's ensorcelled. His name is Tibbers.
One of these follows you around in Jade Empire, going by the name of Wild Flower. Although her actions and attitudes aren't creepy per se, one has to wonder what the design team was smoking when they designed her. The fact that she's the already-dead host of Spirit Guardian Chai Ka and his 'Other' certainly doesn't help matters any either.
That game also features a pair of ghostly children who drowned during the flooding of Old Tien's Landing. One of them tries to convince you to help her get revenge on the orphan master who left them to die.
Lieselotte Achenbach from Arcana Heart. Wanted criminal in another dimension, and carries around a legless puppet with her sister's spirit trapped inside. And she's only ten years old. Nope... nothing creepy about that at all.
Then there are the notorious Children of Goldshire in World of Warcraft: a group of six children who live in an upstairs room in one of the houses in Goldshire (an otherwise peaceful, low-level human settlement). They sometimes make trips to nearby Stormwind, except that they always form a group shaped like a pentagram and if you go upstairs to their room, the mellow tune suddenly gives way to ominous ambience. People have reported hearing strange voices in that room and some players end up spooked to such a degree that they swear to never enter that room again.
There's Pamela Redpath, a ghostly girl in Eastern Plaguelands, although she's a lot more depressing than creepy.
A non-human example: Wrathion, the purified black dragon. He is TWO YEARS OLD and is already well-known for being manipulative and has already had players murder his remaining family, including his father Deathwing. His human form is a short human male, who looks like he's in his early teens. His dragon form is a tiny baby blackwhelp...the kind we've spent the entire game farming for mini pets.
The Keepers in the Thief are a secret order of mysterious men and women who gather in dark places wearing black cloaks with hoods, so it is no suprise that the girl who translates the mystic words of the seer is also creepy. In the ending of Thief 3, she is revealed to be a monster that wears the skin of a girl it killed decades ago, and infiltrated the organization that worked to stop her.
Lauryl from Thief 3. Incredibly creepy voice (being voiced by frickin' SHODAN helps) and prone to send you jumping by butting in while you're almost cornered by the Body Horrors in her asylum 'home'. There's a also bottle of her still-warm blood in the cellar, despite the fact she's been dead for years. Yet another reason why the Shalebridge Cradle is still probably the scariest level of all time. Oh, and she's on your side.
Overlord II's protagonist is the son of the Overlord of the previous game. The beginning of the game will have you playing as the Overlord's son as a child. Naturally, he is mostly faceless and is quite malicious, particularly towards the kids that bully him in the beginning. Contrary to other examples of this trope, he looks quite scary and is given the all-too appropriate nickname of Witch-Boy.
Considering Overlord tends to parody fantasy tropes and etc, the rather Obviously Evil look the Overlad has is deliberate.
The banshee from Fable II attacks by sending "ankle-biters", shadow monsters that look like creepy children with swords and knives, after you.
From Advance Wars: Days of Ruin, we would like to introduce Penny, whose interests include explosions, and... actually, mostly just explosions. Don't worry, Penny likes you. Unfortunately, Penny has a tendency to do what Mr. Bear says, and Mr. Bear HATES YOU!
In Chrono Trigger, the young boy Janus and his cat Alfador are randomly encountered by the party in Enhasa. Upon meeting him as a stranger, Janus abruptly and unsettlingly prophesies, "The black wind howls. One of you will shortly perish." Later, Crono dies trying to protect his friends and Schala from Lavos, fulfilling Janus's prophecy.
The creepy effect gets kicked up a notch if you realize that the black wind he mentions is actually the sound heard when traveling through time, and he grows up to be Magus, the primary antagonist until this point.
The ghosts from Corpse Party. Specifically the Girl in Red, Sachiko Shinozaki, who murdered three other children in Heavenly Host and then let an innocent man take the fall. Their spirits were what created the spirit world of Heavenly Host and trapped many others there to be killed as well.
Not to mention the reveal of Sachiko as the murderer is through the eyes of one of her victims...and you realize that she's giggling and essentially experimenting on each victim to see what stabbing them in what place will do. Sachiko is the definition of Creepy Child.
Clive Barker's Undying: All of the Covenant children once they were cursed. A particular mention goes to Lizbeth, who bit her nanny and licked her lips afterward.
The Child Crusaders from Clive Barker's Jericho. These creatures are the malevolent spirits of young children forced to march in a crusade, only to be horribly slaughtered. After the Breach is opened in that timeline, the evil of the Firstborn transforms the children's souls into vicious, hateful ghouls, harbouring great anger towards the adults who let them die. They appear as floating, sharp-toothed, pale-skinned creatures with their lower torso missing and their intestines hanging out. They also have no hands, and use the shredded tendons of their arms to attack. They also make very creepy moaning and shrieking sounds, and their disembodied crying can be heard before the Jericho Squad encounters them.
The form of the Firstborn could also qualify. Here you have an evil, all-powerful, godlike creature who despises humanity, and it takes the form of a small, naked child with glowing white eyes and a distorted voice made up of several male and female voices speaking at once.
If the game didn't make her seem creepy enough, the fandom certainly made Touhou's Flandre Scarlet incredibly creepy. She's a 495 year old vampire with the body and mind of a child, as well as mental and emotional insecurities (read as 'insane') to boot, who has the ability to destroy whatever she wants by bringing its "Eye" into her hand and then clenching it into a fist...
The Xenoas from Requiem Bloodymare are essentially a race of Creepy Children... who have recently been made playable. Childlike bodies, with some creepy physical traits, adult-like intelligence, and a usually-hidden disdain and hatred for all other races.
The Infernas in The Suffering. In human form, they're an immortal trio of eerie, smiling children that talk quite candidly about how they play with the souls of your dead children for all eternity. In monster form, they're charred corpses that giggle constantly as they soar towards you on a jetstream of fire.
Ashley from WarioWare seems to be a parody of this trope.
The Narrator from the Starsiege cutscenes. The major cutscenes in the game are narrated by a young girl with a British accent and an oddly extensive vocabulary. The opening of the game introduces her by an oddly echoing humming, the beginning of a schoolyard chant, followed by her singing: "Little Lord Peter, missing his liter while Hercy plays in the red. Down came the Glitches and burned us in ditches and we slept after eating our dead." Also, in one of the possible endings, she further narrates "It was only a question of time before the Cybrids captured the last human survivors. Now, we're all being systematically elminated."
Soon after you finish the second mission in Survival Crisis Z, you have a vision of a greenskinned girl wandering down a bloodstained hallway. This is probably meant to be the first clue that this isn't your typical Zombie Apocalypse.
They appear for real in episode 3. And they have knives.
Kid Albedo from XenoSaga. Dear God. Especially at the end of Episode II when he taunts Rubedo.
PARIAH from Prototype. And if the Web Of Intrigue is anything to go by he's eternally a child, and can kill anything by touching them.
Dante's Inferno has the Unbaptized Babies who also qualify as undead children. They move like real toddlers as a toddler was brought in specifically to do motion capture for them.
Sally from Dragon Fable. She's a cute little six-year-old with blond pigtails... and she plays with the ears, eyes and hearts of zombies. For fun. After the boss is destroyed in the Necropolis Quest, Sally finds the now-abandoned subterranean university-city of necromancers, death knights and the undead, and claims it as her playhouse.
She even creates a cross between a Skeleton and a gingerbread man for the main character to try out for fun. Meet the Gingerdead Man.
Jojora from Mario & Luigi: Superstar Saga, a magical, levitating girl. She appears when you first enter Joke's End amidst some extremely creepy music and starts to taunt you. After a couple of more sightings, she says she's bringing a friend over to play...who turns out to be a hulk many times larger than she is, and the two attack you.
Tales of Symphonia: Presea from when you first meet her up until you make her a new Key Crest and free her from her Cruxis Crystal.
Tales of the Abyss: You only see him in a single brief flashback, but from Nephry's descriptions, Jade Curtiss was definitely creepy when he was younger. Apparently he liked to experiment on small animals. And himself. Frequently. Much more obvious in The Anime of the Game, in which he is terrifying.
Bahamut's Fayth from Final Fantasy X. It's just... the mysterious way he speaks to Tidus, the fact that his eyes are always covered, the fact that he's one of the few characters in the game who actually understand everything, the fact how incredibly creepy his version of the praying song sounds, due to him being such a small child, the fact that his battle-form is a giant, Civilization obliterating Dragon-Something-Hybrid-Beast... This child surely gave some people serious nightmares.
The arcade sleeper hit The Outfoxies features the playable Ice Climbers-esque siblings Danny and Demi. They giggle like small kids typically do when they run, even if they happen to be packing a machine gun or RPG at the time, and after they've murdered one of their fellow assassins the same giggling sample is played while one of them draws an indiscriminate green squiggly mark on the television set that displays their recently expired target. It's much creepier in context.
Roxas and Naminé don't look much more than fourteen, but they have this funny look about them - possibly related to the fact that they're Nobodies.
Birth by Sleep has Ienzo, who never says a word but just keeps staring... and staring... and staring.... Because Birth By Sleep takes place before Chain of Memories, the audience already KNOWS howhe'sgoingtoturnout.
Special mention goes out to the child version of Kirie in Fatal Framedespite not being a hostile ghost, the Kiryu Twins in II, the Handmaidens in III, and Ayako in IV.
Especially Ayako. She's as cute as a button, but there's a very good reason she was in that mental institution.
In the Strange House in Pokémon Black 2 and White 2, a building where Ghost Pokémon reside, you also meet a ghost girl. You see her three times while exploring the place; the first two times, she mutters things about darkness and nightmares, and then vanishes. Then, when you find the Lunar Wing in one room, she talks to you, and asks you to give it to a Pokémon before disappearing. The Pokémon you must give it to is Cresselia, who is found on the Marvelous Bridge; if you want to capture it then, you are able to try. You might also see the ghost girl on the bridge, but she vanishes forever if you succeed in capturing Cresslia.
Several Fairy Tale Girl trainers in Pokémon X and Y come off this way. The pre-battle sprite makes it even worse.
Special mention to the Stepford Smiler pair, who are incredibly enthusiastic about their suicide pact.
Kamila in Ghost Trick acts like a wholesome, happy little girl until she's possessed by Yomiel and smacks Lynne around with an uzi. Even her character sprite is different, with her hair down to hide her eyes in shadow.
Nearly every child in Dragon Age is creepy, though in a couple of cases one suspects the creepiness was unintentional. There's a creepy child standing around reciting a creepy poem in a Creepy Monotone in the Haven graveyard. There's a villager's daughter in danger of possession in a basement in Honnleath. And Arl Eamon's son Connor, who is possessed, is as creepy as they come. And then there are the singing ghost children in the Alienage orphanage ("But I'm dying, Ser Willem, Ser Willem, in pain.")
Samantha Maxis from Nazi Zombies. There's a reason she's called the Demonic Announcer, or according to Tank, "Devil-Voice!" Then there's her laugh when you get the Teddy Bear from the Mystery Box.
Gary from Bully is a tad old, but he fits pretty well in a more comedic sense. I mean, yeah, he's a sociopath, but he just loves being a sociopath so much that you can't help but laugh with him. Well, until he's caused the entire school to become a warzone and strips you of all your allies. Because A) He's crazy and B) He knows you're a threat. But still, he's so fun when off his medication.
Albedo from Xenosaga was this. He was clingy to his brothers, namely Rubedo, beat his other brothers up a lot note Though that was only because he thought they could regenerate like he could. and was overall just an incredibly creepy child... Which only got worse when he came into contact with U-DO and went insane...
Tiny Tina in Borderlands 2 is a 13 year old girl who has some...interesting qualities to her character. When you're first introduced to Tiny Tina, you see her playing a more violent version of "Pop Goes the Weasel" with a bandit by blowing him up with explosives. She later on asks you to fetch a "friend" of hers, who turns out to be a baby version of the monstrous insects you fought in the region, in order to get ready for her tea party. Tiny Tina then asks you to fetch the guest of honor, who is a bandit named Flesh-Stick; Tiny Tina straps the bandit to a chair, has you smack him, and then she tortures him to the point where the bandit begs for the pain to stop, only for Tiny Tina to respond by electrocuting him to death. Tiny Tina's demeanor throughout the whole game has her talking dirty as if she was 30 years old while still doing little kid things like having tea parties, which adds to the weirdness factor. Considering that the world of Pandora isn't exactly friendly, the kid definitely went through some rough times to be what she is today.
Kula Diamond starts as a very creepy and sheltered pre-teen girl who nonetheless has a good heart underneath all the snow and ice powers, but barely knows how the real world works due to her upbringing as a guinea pig and assassin for NESTS. She has been getting better lately, but she still has some traces of the trope.
Robopon reveals Dr. Zero and Dr. Zeke were this as children in the second game.
Ilya from Fate/stay night. Even when she's calling the hero 'Oniichan'. Especially when she's calling the hero 'Oniichan'.
Higurashi: When They Cry provides the example of Rika Furude, the little miko girl who usually serves as a Deliberately Cute Child but knows way too much about what has happened and what will happen, and who also possesses a rather disturbing fixation with torture and mutilation. However, this later revealed to be because she's Really 700 Years Old in mentality and often on the receiving end of the aforementioned torture and mutilation due to a "Groundhog Day" Loop that only she and Hanyuu are aware of.
All the members of that club are creepy at times, but the only other one in the right age category is Satoko, whose crazy moments tend to inspire more sympathy than fear.
Inubushi Keiko, the mentally unstable serial killer from Remember11.
Yuni also has his moments.
The unnamed girl in the notorious Quicktime animation Play With Me goes beyond merely creepy and right into nightmarish.
The kids from the Nick.com clickamajig Black Licorice. In the game you're supposed to give them candy but you CAN'T give them black licorice because it causes them to transform into horrible grotesque monsters.
Vendetta from Making Fiends is an elementary school kid who isolates herself from the rest of the class and makes fiends to sic on anyone who makes her mad...which is everyone. Her name should give you a clue. She also speaks in a weird, gravelly voice that has some sort of sinister accent.
Little Joel from Lawn Justice seems innocent at first, but (he's actually responsible for all the destruction in the series). Mommy's little hero.
Kari from Mari Kari Mari's undead twin sister who murders anyone who makes her upset.
Mari is unnaturally cheerful, not letting the mysterious horrible deaths of everyone who's even slightly mean to her or the general hatred and contempt seemingly everyone holds for her ever get her down.
Pandora is introduced in this form in El Goonish Shive. She's notably somewhat an aversion since her form changes to fit her mood, so she only looks like a child when she's being playful and mischevious. She's a lot creepier when she's pissed.
Zimmy is introduced as an over-the-top creep: she's verbally combative towards the protagonists, her science fair entry is "an abomination" the reader never gets to see, she seems to have no visible eyes, and a body-snatching demon is afraid of her. This gets thrown on its head in a later chapter, when the revelation that she's been Blessed with Suck turns her into a sympathetic character who abuses people so they'll avoid her, for their own safety. Which gets flipped on its head again, with the revelation of how Zimmy treats her best friend and why.
The main character, Antimony Carver, is an interesting example. The audience sees her when she's alone with her best friends, and thus sees that she's pretty well-adjusted for someone with such an unusual childhood (and the missing parents). Eventually, however, it's revealed that most of her classmates see her as a creep — because all they see of Annie is her impassive public facade and the fact that she never socializes with anyone besides Kat.
Annie's father, Anthony, comes across much like Annie (in Flash Back): a normal guy to his best friend Donny, an emotionless robot-boy to everybody else. Apparently Annie looks like her mother and acts like her father. Must be torture for poor Eglamore.
Chelsie Warner of Concession appears to be a cuddly anthropomorphic lamb-girl in a pink dress. On her first appearance, she stabs Artie Crowley in the eye with a crayon. Shortly thereafter, she has sex with him when he's too delirious to realise what he's doing. When he wakes up, he is horrified not only because of what he's done, but because "Chelsie is actually a boy." It's recently been revealed that Chelsie's hypersexual behaviour is related to a form of childhood bipolar disorder. She became significantly less creepy with proper medication and hormone treatment, after being adopted by the local (quite definitely non-paedophile) preacher. The Where Are They Now epilogue shows her in her late teens, fully transitioned, apparently recovered from her unfortunate past, and calling Father Tim "Dad".
Collin is a telepath who can walk through walls. He's experienced fear from come people due to this fact.
Quinn is also a telepath. She can also walk through walls, teleport through another dimension that only she can reach. Quinn also has "Oulies" as friends, who are beings who are trapped between life and death in a realm that only Quinn can see. Quinn's invisible friends are real. And to top it all off, Quinn has been known to surprise/creep out Collin and the other members of her family.
Erfworld: Parson Gotti suspects that Wanda was one of these. Before he learns that Erfworld has no children.
In Sire, Susan causes Anna to appear to be one of these, hijacking her body, sitting quietly on her bed, and pulling all the hair out of its head, slowly counting each one off. Her parents promptly send the innocent Anna off for help.
Mua, the antagonist, from Kiss Wood. She's enslaved a huge amount of the population and she wants Sul to become another. Her introduction involves her showing one of the slave camps to Sul, watching a slave trip and a guard killing him (believing he's no longer able to work and therefore useless); she laughs at the sight and says there's an opening place for him.
Aradia from Homestuck is probably the most "classic" example of this trope in the comic, but most of the trolls can fall under it due to some rather Troubling Un Childlike Behavior. Caliborn is also pretty disturbing.
There are a few examples in Book Of Lies, but The Girl in the Tower takes the cake.
Ben Drowned: Ben thinks you shouldn't have put him here...
SCP-053 is a seemingly normal three-year-old girl. But there's a reason she's detained by the SCP Foundation. Something about her is deeply unsettling to adults and older children. Unsettling to the point that it induces violent rages, usually directed at her. Then, the moment they inflict any harm upon her, they die almost instantly and she regenerates rapidly from any injury they managed to inflict. Omnicidal Maniac SCP-682 seems to like her, though — and, as the label suggests, he holds a murderous hatred for all other living things.
SCP-899 is a spatial phenomenon that kidnaps regular children and turns them into this. And they will kill you.
All child SCP items are this trope. Strangely though very few of them are an outright Enfant Terrible, even 239, a Keter-class, isn't really evil, just naive and easily tricked into believing something is true/real and considering how her powerswork.
Katy Towell's Children R Skary IS this trope. One of the reasons she drew the art and made the animations was because she thought children were creepy.
Survival of the Fittest v2 has Brandon Cuthbert, a 12 year old genius who skipped a few grades and is in highschool. Before getting sent to the island, he had a fascination with dissecting woodland creatures. And while on the island, he killed at least 3 different characters, including slicing one open after suffocating him to unconsciousness with an X-Box controller. It also happens in quite a few backstories for some characters.
Violetta. At times, she can fall into this, but she's harmless, and what mostly gets to people (namely Sunflower) is that she is of Transylvanian decent (her ancestors can be traced back to ancient Transylvania) and looks similar to an archetypal vampire, coupled with the fact that Toki adopted her from an orphanage in said region.
Tim from Marble Hornets when he was a kid. He would habitually go into bouts of panic and terror while he was being confined to the mental hospital, claiming that something was watching him even though his doctors could see nothing. He ran away from the hospital on multiple occasions in order to hide from it, ending up at Rosswood Park or in the maintenance tunnel from Entry #60. When the doctors locked him in his room after these escapes, he would scream and claw at the walls until he had to be sedated with his medication. In Entry #65, he appears to relapse briefly into this state.
Parodied by College Humor in "Horror Movie Daycare", which unites many of the creepy, satanic, possessed, ghost, and alien children of horror movies in the same daycare.
Cameron in The Babysitter. He speaks seldomly, won't respond to the babysitter or his mother, watches the same YouTube video over and over again, and has a nasty habit of showing up behind people. Additionally, when he somehow summons the host of the show and his giant teddy bear sidekick, both dripping blood and sporting Slasher Smile s, he has no reaction; in fact, he seems happy, even after his babysitter is killed before his eyes and it is implied his mother is next.
The City Council sends messages to Cecil through various mute, empty-eyed children. Cecil complains that he's never sure what to do with them once they've delivered the message by whatever means they're using this time, and asks if anyone wants one, before noticing he's disappeared.
When two boy scouts are going to receive the highest rank, Eternal Scout, hordes of creepy pale children appear and watch people silently. As the ceremony gets underway they attack and try to drag people away to whatever place they came from. Speaking of which, the boy scout ranks also include Blood Pact Scout, Dark Scout and Fear Scout, and include badges like Invisibility and Advanced Siege-Breaking Tactics.
Tamika Flynn is 12, and emerges from the Nightvale Summer Reading Program with a book well above a 12 year old's reading level and the severed head of the Head Librarian - thus saving the children from whatever ghastly fate was in store for them at the hands of the librarians. She proceeds to read at a very high level while forming the children of the town into a resistance movement against Strexcrop while wearing the hand of a librarian around her neck to prove that she has already overcome the most fearsome of foes, and Cecil is completely on her side.
Numbuh Three's little sister Mushi at first comes across as being just as childish and ditzy as her older sister. However when she is stuck alone on the spaceship with Cree and Numbuh Five she gives a speech about how they should stop fighting, because sisters are supposed to care about each other and be friends. As the teenage villain stops to think about this, the little girl pushes her out the airlock, turns to Abby and says older sisters always fall for that mushy stuff. In her next appearance, her true colors are revealed as she stabs her sister's stuffed animal and is sent to her room forever. After that, she becomes a full-fledged villain and creates a spanking monster to attack kids.
The Delightful Children from Down the Lane are a more blatant example. They carry out the adults' evil orders, they never use their individual names (except the one with the helmet, Lenny), and they're always speaking in unison. When Lenny joined back with the others, he just slides into his spot while a creepy, morphing sound plays, while he regrows his helmet. Ugh.
Darla from Cats Don't Dance who hides a psychopathic personality behind a sickeningly sweet child-like facade.
Three year old Angelica from Rugrats, while seemingly polite and sweet to adults is actually a Spoiled Brat and a Control Freak who more often than not abuses her baby cousin and his friends. Though there are rare moments where she is nice to them.
She also has a tendency to root and sympathize with clear villains...
Even worse is Angelica's baby brother from her nightmare in the episode "Angelica's Worst Nightmare".
A 9-year-old Azula in a flashback episode of displays these traits, doing such things as burning a doll (a gift from her uncle), mocking her uncle's sorrow about his son's death, and hoping for his death as well as her grandfather's so her father can get on the throne. Her mother speaks for everyone when she wonders "What is wrong with that child?"
Creepier than all of that together is her display of love for her brother:
Azula:(singsong voice) Dad's gonna kill you! (normal voice) Really, he is.
(He was. It's clear where Azula got her psychopathic streak from.)
Whenever a young Avatar—like, say, Aang—goes into the AvatarState, the results can be extremely unsettling.
One episode of Dexter's Laboratory, "Aye-Aye Eyes", features Dexter returning a creepy looking rag-doll bunny to an even creepier looking doe-eyed little girl who then follows him around everywhere. He eventually gets rid of her by hooking her up with a creepy doe-eyed boy.
Gaz of Invader Zim is a morbid, vindictive little girl with supernatural powers and prowess who plunges people into nightmare worlds from which there is no waking if they dare interfere with her pizza or her videogames. Not even her brother is immune. Her father is, though.
Not to mention the ROBOT CANNIBAL STUFFED ANIMAL SECURITY SYSTEM.
The eponymous Mandy tricked The Grim Reaper into eternal servitude, using him as her maid and his powers for personal gain, and faces down everything from the Boogeyman to Cthulhu with nothing more than a wry comment. She also never smiles, ever, because doing so would cause the universe to implode. She was also able to take over a large evil brain/alien when it ate her brain.
Then there's Nergal Jr. Nergal Jr is able to turn into almost anything and is extremely creepy. His true form (although it's rarely seen) is very horrid to see.
South Park has a few, including Kenny. Then there's Damien from the episode Damien - after all he's Satan's kid.
Cartman; ever since the Scott Tenorman incident he's become increasingly psychotic throughout the years, going as far as attempting to kill his mother when he feels she doesn't love him anymore. Even Damien McSatan thinks there's something wrong with Cartman.
W.I.T.C.H. has Miranda, a shape-shifting spider demon who takes the form of a little girl. Often uses her human child form to trap and trick her prey and enemies, but still manages to keep her creepy spider attitude.
In the episode "Wild Barts Can't Be Broken," the kids all break curfew to see The Bloodening — a parody of the 1960 horror film Village of the Damned — featuring sinister telepathic and telekinetic children terrorizing an English village. When the kids of Springfield are punished for sneaking out, they get revenge by hijacking the radio airwaves and, speaking like the Creepy Children of the film, broadcast their parents' embarrassing secrets.
"We've got to do something about these blabbermouth kids and their creepy English accents!"
"Doctor, we know you and the bootblack have been rogering the fishwife in the crumpet shop!"
Another episode featured a horror film starring Lenny Leonards as a gardener called The Redeadening, which not only draws elements from Village of the Damned, but also Child's Play (a demon-possessed doll) and Coraline (victims having their eyes replaced with buttons) as well.
Lenny: It looks like if the buttons are sewn onto my eyes, but they're actually held up by hot wax.
Bart himself becomes one of these in "The PTA Disbands" when the teachers strikes lasts too long. There's something about flying a kite at night that's so unwholesome...
Some say that Suzy Johnson, Jeremy's little sister on Phineas and Ferb, is the true villain of the show. And who can blame them? As Jeremy's self-proclaimed "favorite girl", Suzy resents her brother's relationship with Candace and constantly puts the hurt on Candace when no one else is looking... and thus, no one believes Candace when she says that Suzy is evil. Buford Von Stom is the only other character on the show who knows what Suzy is really like (no one believes him either).
In The Weekenders, Frances is a middle school girl who does nothing but say "I like pointy things" while her eye twitches. According to a flashback, she used to be a kid genius who was friends with Tish, before her sudden decline into... whatever it is she's suffering from.
The final episode of The Weekenders shows how frightening Todd and Quintie can really be. Apparently, they're threatening enough for the S.W.A.T. team.
Creepie Creecher, the protagonist of Growing Up Creepie, is a young girl raised by insects. She is a junior Goth in style, and her creative efforts regularly terrify her teachers and schoolmates. Things like ghost stories and urban legends merely arouse her curiosity, usually leading to her debunking them (usually followed by an Real After All twist that only the audience sees).
The three Fates of Gargoyles can appear as three creepy little girls (among other things), and make this creepier by turning into talking little-girl statues and then crumbling before the gargoyles' eyes. (In fact, they seem to be able to take the form of any female creature of any age; they can be lovely young women, demonic old hags... Whatever they want, so long as it's female.) They ARE the Weird Sisters of Macbeth, after all.
Teacher: N-now, what did we say about the fire ants? They have a tendency to bite people Lizzie: Only my enemies.
Ace from the first-generation Royal Flush Gang in Justice League ("Wild Cards" arc). Just looking at her can make you go insane. Even if you already are; ask the Joker. She turns into the most dangerous, frightening Woobie you've ever seen in the JLU episode Epilogue when you learn herbackstory. But for all the scary, you still want to hug her.
Hey Arnold!: Curly and his Troubling Unchildlike Behavior sometimes comes to the point of high-potential Ax-Crazy. For example, upon finding that he wasn't assigned the Ball Monitor privileges that he anticipated for that week, he holed himself up in the principal's office with the balls, throwing them at anyone who tried to reason with him. There was also the episode "False Alarm" where he tried to get Eugene expelled simply because he ruined his favorite pencil. And one episode mentions that he once bit off the head of a live chicken, though he insists it was only that one time.
Parodied in American Dad!. In Rapture's Delight, After the End Stan goes to the headquarters of the Anti Christ (which is the destroyed UN headquarters in New York), he sees a Creepy Child and immediately shoots it under the assumption it's the Anti Christ. As Jesus tells him, that was just a normal kid who sometimes comes there to play. Oops.
Ed, Edd n Eddy: Sarah. She is Ed's psychotic spoiled brat of a little sister, who acts cute and charming only when it serves her. Sarah has Ed's unending loyalty and obedience, mostly from her threats of snitching on him and her constant acts of physical violence against him. She has a short temper and is easily agitated by others, especially her brother and his friends and will often go on a violent rampage against anyone who annoys her or who bothers her best friend Jimmy. It's also implied that Ed's parentstreat him with emotional abuse, while Sarah is treated like a princess.
In one episode of The Boondocks, a six-year-old boy named Lamilton Taeshawn in a taped therapy session describes, with a blank face, how he hurts people and states how he doesn't care if he killed any of them. When the therapist asks why does he do bad things, in a chilling confession he states "cause it's fun to do bad things." Things only got worse from there.
By which we mean, "reduce his attention span to rubble", preventing him from focusing on people that annoy him long enough to use his powersnote And also rendering him indistinguishable from an ordinary little boy, to the joy of his parents.
The episode of The Little Mermaid the animated series "Island of Fear" featured a mad scientist with a lab assistant, a very creepy young boy named Daniel. Sebastian even screams the first time he meets him, but as it turns out he's not really evil, just misunderstood; he doesn't have many friends and he took the job because his parents were poor.
Youngblood from Danny Phantom. This is most prominent in his second appearance when he tries to behead Jazz with an axe, and later pushes Danny's parents down a waterfall.
Brittany Taylor's little brother Brian from Daria: he's a mean hyperactive brat who throws temper tantrums when he doesn't get what he wants, but the creepy thing about him is in the episode with the lab rats. Brittany steals Daria's rat and gives it to him, and he rubs his hands together and laughs wickedly. The next time we see the rat it's huddled in a corner and trembling; the guide book states that he's killed every pet that the family ever owned to the point where they stop bothering to name them.
The original Ben 10 series had Kevin. He was Ben's age, but highly sociopathic and his plans added up to "how can I kill the maximum number of people in my plan to get money/revenge?" He had all Ben's 10 original alien forms plus a hideous mashup of them that let him use all their powers at once, but it was creepiest when he was a kid and so pure evil. This is what made his (initially unexplained) Heel-Face Turn between the original series and Alien Force so jarring: bad guys become good all the time, but he wasn't Ben's Catwoman, he was Ben's Joker.
Li'l Gideon definitely counts in Gravity Falls. First he tried to cut Dipper's tongue out with lamb shears just because he thought Dipper was trying to get between him and Mabel, and in the first part of the two-part finale, he summons a dreamwalking demon to find out the location of the deed to the Mystery Shack!
Subverted with Lydia Deetz from Beetlejuice. In the movie, Lydia was a depressed "strange and unusual" child. In the cartoon, she's still strange and unusual but she's also sweet and creative.
Portia, Gwen, Penny and the unnamed members of the Honey Bee trope from The Mighty B!.
The titular character of Ruby Gloom plays with this. While Ruby is a pale six-year-old girl living in a house of horror-esque monsters, all of which are her friends, she is very kind and friendly, as are said monsters.
Dawn from Total Drama Revenge of the Island, as she manages to creep out several contestants with the freaky ability to read their auras, including Zoey, Dakota Milton, Lightning, and Scott. Lighting even refers to her as a "Creepy Girl".
In Barbie And The Secret Door, Malucia is a little brat with magic draining-powers. She uses it on a unicorn without remorse, and her goal is to take all of the magic in the entire land.