%% Missused and Zero Context Examples and incorrect examples have been commented out.
%% Please do not add Zero Context Examples.
%% This trope is not simply about an adult who acts like a child.
%% An example must be "an immature adult who spends most of their time with children."
%% Image moved to ManChild per Image Pickin' thread: http://tvtropes.org/pmwiki/posts.php?discussion=1383496051050255400
%% Please start a new thread if you'd like to suggest a new image.
->''"[Winnie]'s like a grown-up AND a kid. Like Pee Wee Herman, only better, because we can have her all week long!"''
-->-- '''Gene Harper''', ''Series/FreeSpirit''

Typically, a main or recurring character who regularly interacts with characters noticeably younger, usually resulting in their maturity level regressing to roughly the same level (if not even lower). They're still capable of acting their age... they just usually don't.

This character shows up most often in anything aimed at younger audiences, where they are PlayedStraight so as to be more appealing to kids. When PlayedForLaughs, it's to show an immature or silly character.

When examples of this trope show up in shows where they are above the CompetenceZone of the rest of the cast, they tend to be teachers, which often yields SenseiChan.

Contrast with WiseBeyondTheirYears, as One of the Kids is rarely treated as any kind of authority, because of their casualness they often do not even earn special respect.

Related to, but not to be confused with, ManChild. Not to be confused with OneOfTheBoys.



* Yukari Tanizaki from ''Manga/AzumangaDaioh'' could be considered to embody this trope, although she is still treated by her students with respect due to being a teacher (by everyone except [[JerkAss Tomo]]). A respect she abuses without shame.
* Adults in ''Manga/LuckyStar'' are often this, to the annoyance of [[GenreSavvy Konata.]]
** Her homeroom teacher Nanako Kuroi is envious about students needing to wear uniforms, as she found choosing clothes a chore. And one time, [[FanDumb she decided the game when her favorite baseball team lost did not exist at all]]. Due to being single, she also spends a lot of her free time on {{MMORPG}}s, where she frequently interacts with her student Konata; though unlike the latter, Nanako is wise enough not to sacrifice working time for playing time.
** Her cousin Yui Narumi is a traffic cop who DrivesLikeCrazy, is very cheerful and energetic. Despite being a young woman, she can also be immature, especially compared to her teenage sister and cousin, who she often visits.
%%** And let's not get started on her ''dad''...
%%** Miyuki's mom, [[NamesTheSame Yukari]] is often mistaken for her big sister, but for her [[TheDitz maturity]] and [[TheKlutz bearing]], she could just as easily be Miyuki's ''younger'' sister-- part of it has to do with her wisdom at encouraging her daughter to be driven at educating herself. They're practically the same, it's just Miyuki ''knows more''.
%%* Mira in ''{{Godannar}}''.
%%* Midori Sugiura from ''Anime/MaiHime'' is a twenty-something teacher and waitress with a love for history and the occult, but repeatedly tells everyone she knows that she's [[YoungerThanTheyLook really only 17]] (and also, evidently, Manga/SailorMoon.) Nobody believes her in either case... especially [[SchoolNurse Nurse]] Yoko, one of her former college mates.
%%** However, it's highly likely that [[spoiler: Midori might have ''faked'' at least half of her One of the Kids tendencies, using it as ObfuscatingStupidity.]]
%%** In Anime/MaiOtome, the sequel to ''Anime/MaiHime'', that version of Midori also insists that she's 17. However it's for a much darker reason: [[spoiler: Her people is suffering from a degenerative disease, and resorted to technology to halt it. 17 was the age she was when she started her "treatment"]]
* ''Manga/RanmaOneHalf'' gives us Hinako Ninomiya, the English teacher that is in her late twenties, [[OlderThanTheyLook looks around twelve]], and behaves like a six/seven year old would. Although she only acts in her child form. [[DualAgeModes In her adult form]] she's usually all business, unless she stays in it for too long.
* ''Manga/{{Yotsubato}}'' has Yanda, who during his first meeting with Yotsuba proves that he's just as immature as she is -- and often goes too far in making himself Yotsuba's SitcomArchnemesis by stealing her food and calling her names -- and [[TheBigGuy big guy]] Jumbo, who starts a one-sided competition with ten-year-old Miura over visiting Hawaii. Yotsuba's father, while more responsible than the other two (being Yotsuba's legal guardian and all), is not above playing along with her antics. However, the three are perfectly capable of speaking calmly like normal adults when the kids are not around.
* Kasugano-sensei from ''Manga/{{Sketchbook}}'' acts very childish at times, which also gets commented on by the students in her art club.
* Yoshinoya-sensei in ''Manga/HidamariSketch'' is a very good example. She considers herself a young woman before even thinking of herself as a teacher, delights in [[CosplayOtakuGirl dressing up in costumes]], and is prone to odd looks from her students. Her principal is always ''extremely'' disgusted with her, and HilarityEnsues whenever they meet.
* Kaneru from ''Manga/DoujinWork'' is an {{office lady}} with a very childlike disposition, which makes her bond with TokenMiniMoe Sora very well.
%%* Yukiji Katsura from ''Manga/HayateTheCombatButler''.
%%* Mrs. Miyaji, and most of the other adults in ''{{FLCL}}''.
* Jack Rakan in ''Manga/MahouSenseiNegima'' doesn't count himself among the main cast, but he's managed to become a major player in the kid/teen-filled Ala Alba. Keep in mind, he's old enough to be considered a BadAssGrandpa. The other Ala Rubra members (Eishun, Albireo) by contrast had a sense of aloofness to the main cast.
%%* America from ''Manga/AxisPowersHetalia'', though he doesn't always act like this. Italy can also be seen as an example.
* While Daikichi Kawachi has this as an InformedFlaw in ''Manga/BunnyDrop'', [[ChildrenRaiseYou he quickly grows out of it]] raising Rin. Rin's mother Masako on the other hand, is a much clearer example, with Rin's biological father (and Dankichi's grandpa) stating in a will that Masako wasn't yet mature enough to be a mother, and Daikichi's impression being that Masako simply doesn't realize the problems she's leaving to other people by not taking Rin.
* ''Manga/SoulEater'':
** Spirit frequently acts more childish and inappropriately than the teenage cast. Marie also counts, though is respected by her pupils.
** [[BigGood Shinigami]] also tends to act like this, although it's implied much of it is ObfuscatingStupidity as to not scare his students.
* Michiko Malandro from ''Anime/{{Michiko to Hatchin}}'' sometimes shows signs of being less mature than her travelling companion/surrogate daughter, Hatchin.
* In ''Manga/ACertainScientificRailgun'', Mikoto Misaka is known among people who are close to her for having some ''really'' childish tastes (such as an obsession with a frog mascot marketed at three-year olds), not to mention her childish inability to accept defeat when fighting [[AntiMagic Touma]]. Kids notice this, [[FriendToAllChildren which is one of the reason she works well with them]].
%%* Ryuuji's mother Yasuko from ''LightNovel/{{Toradora}}'' refers to herself as "Yacchan", and makes childish requests like wanting her name written in ketchup on her omelettes.
%%* Keroro from ''Manga/SgtFrog'' has some attributes of this, including throwing the occasional temper tantrum.
%%* Julia from ''Manga/RaveMaster'' has some aspects of this.
%%* Masane Amaha from ''Anime/WitchBlade''. Good thing her daughter is WiseBeyondTheirYears.
%%** As time goes on, she [[CharacterDevelopment gets better.]]
* [[IntangibleMan Sein]] of ''Franchise/LyricalNanoha''. She could act her age if she needs to, it's just that she usually doesn't. She even does an all-out temper tantrum when she gets caught red-handed doing one of her pranks in ''[[Manga/MagicalGirlLyricalNanohaVivid ViVid]]''.
--> '''Nove:''' Geez... it makes me feel depressed when I realize that you're supposed to be older than myself.
* ''Anime/ReadOrDie'':
** Yomiko Readman lapses into this quite a bit, when she's not [[LetsGetDangerous killing people]]. In the manga, she once expresses her displeasure by making a paper airplane with her making a rude face and throwing it at her opponent.
** And let us not forget [[spoiler:the second Nancy clone from the OVA/TV series,]] who has the mind of a five year old due to brain damage and amnesia.
* ''LightNovel/DragonCrisis'': Eriko is unable to cook and irresponsible, leaving her younger cousin Ryuuji to be the grown-up one.
* Kotetsu T. Kaburagi aka Wild Tiger of ''Anime/TigerAndBunny'' might as well be the embodiment of this trope. He is a thirty-something father and veteran superhero. This does not stop him arguing with small children over trading cards, acting like a ten-year-old fanboy at the mention of his favorite superhero (Mr. Legend), riding animatronic rides meant for little children at the mall while waiting for his partner/talking on the phone with his daughter, or replacing the background of his coworkers' cellphones with pictures of himself making silly faces.
* Irabu-sensei from ''Literature/{{Trapeze}}'' is this. His Adult and especially Stuffed Animal personas act childish, silly and borderline crazy awesome (for normal and average people around him), but when he switches over to his ''Child'' persona, he acts serious and like a decent psychiatrist.
* Handa, the 23-year-old main character of ''Manga/{{Barakamon}}'', is one of these, often hanging out with seven-year-old Naru and her friends.
* Kei's mom in ''Manga/HououGakuenMisoragumi''. She's also considerably ignorant to go along with her immaturity.
* Kagura from ''Manga/{{Gintama}}'' is often showing hanging around the neighbourhood children and playing games with them. Arguably Sougo too since he acts very childishly sometimes, especially when he's around Kagura which can cause them to descend into playground-scale wars.
* In ''Manga/OnePiece'' 19-year-old Luffy and 8-year-old Momonosuke get into several funny and heated arguments because Luffy is just as immature as Momonosuke and probably even dumber.
* While most Pokemon in the ''{{Anime/Pokemon}}'' anime tend to gain a more mature and aloof personality after evolving, there have been exceptions.:
** Compared to the rest of Ash's Kalos mon, Goodra remained as {{Adorkable}} and playful as it was as a Goomy, which lends to several characters recognising it as such just from behaviour. When it reunites with it's childhood friend, Wooper, it goes into an excitable fit, despite now being over ten times it's size.
** Ash's Lycanroc in the ''Sun and Moon'' series tends to act as much like friendly and energetic puppy as it's Rockruff form and even has a {{Friendly Rival}}ry of sorts with the unenvolved Litten.
** Kiawe's team consists of the enormous powerhouse Turtonator and the evolved Alolan-forme Marowak. Both engage in the class' fun and games as much as the cuter Pokemon and are often seen bickering or scrapping like childish siblings.
* Ilulu of ''Manga/MissKobayashisDragonMaid'' is stated to be the same age as Tohru, roughly the dragon equivalent of a sixteen year old. However, due to past childhood traumas, [[{{Manchild}} she's emotionally stunted]] and she's shown to vastly prefer the company of younger children such as Kanna and her elementary school friends. She ''can'' be mature, but even then her preference for the company of kids comes through. Her choice of job, part-timing at a candy store, allows her to contribute to the household, as Tohru insisted she do, but also means she can work in a place children often visit.
-->'''Ilulu:''' Kids... you know... I like them... I like playing with kids... but when you have a job you can't play... so at least I want to be in a place where kids look like they're having fun... is what I thought.

[[folder:Comic Books]]
%%* The modern take of the ''ComicBook/{{Shazam}}'' Captain Marvel with the superhero keeping the personality of the boy, Billy Batson, in his Marvel form and the same going for the modern take on his sister, Mary. Captain Marvel is an interesting example of this trope, both because he's a literal example and because Billy is [[WiseBeyondTheirYears very mature]] for a kid his age, which is why most people don't catch on to his being an adult child. This also means, that depending on the situation, someone could meet both the Captain and Billy, and come away with the impression that Billy is more mature.
%%* Lou's mom in the French comic book ''ComicBook/{{Lou}}'' In addition to being a video game addict, she generally tends to behave in a more immature way than her 12-year old daughter.
* Grandpa from ''ComicBook/TheBeano'' acts like a child and plays with children but as his name suggests is elderly (although he is never shown to have Grandchildren) and also has an even older dad who used to beat him with a slipper if he misbehaved.

%%* Misato from ''FanFic/NobodyDies'' has tendencies like this, not unlike her canon self. However, it's presented in a more positive spin to pretty much being a reconstruction of the trope. Her ability to be kiddy and have fun allows her to bond better with the pilots, but she still knows to buckle down and be an adult when it's time to kick Angel butt.
%%* Ernest P. Worrell in the Ernest films, especially in ''Film/ErnestScaredStupid'' in which none of the parents believe him about the disappearances of their children or the troll.
%%* Taken in a somewhat more serious tone with protagonist Buck from ''Chuck and Buck'', who appears to have an endless supply of blow pops, a room filled with children's games and toys, and exhibits other odd habits throughout the movie. Granted, [[spoiler:his childhood wasn't exactly normal]].
* Buddy the Elf in the movie ''Film/{{Elf}}'', in which most of his actions are naive, ''adult child''-related, not elf-like. In fact, he's just about an opposite to all of the other elves in the film.
* Maria from ''Film/TheSoundOfMusic'' loves singing and dancing and being a free spirit. This concerned the nuns at the Abbey, as she at first wanted to be a nun.
%%* Alan from ''Film/TheHangover'' definitely acts like a child. [[ChildrenAreInnocent Just not as innocent as one]], trying to buy ecstasy and saying he wouldn't care if they killed someone while in Vegas.
%%** Although Alan does act pretty innocent the rest of the time. He explains buying the "ecstasy" as wishing for everybody to have a good time and is visibly traumatized at the thought of Doug possibly being dead. He also gets into fights with children, is banned from schools because he tried to play with children (which the parents and teachers thought was suspicious), curses in GoshDarnItToHeck and on the way to pick up Doug, begins singing a Disneyland-like song about how they're the best friends ever.
%%** The sequel [[{{Flanderization}} raises those traits further]], and even has Alan having a flashback of the [[WhatDidIDoLastNight lost evening]]... portraying every character as a child!
%%** It doesn't help that Zach Galifinakis, the actor who plays Alan, has a full-grown beard.
%%* The main characters of ''Film/MysteryTeam''. [[spoiler:Or at least Jason, in that Duncan and Charlie have already applied for college.]]
%%* ''WesternAnimation/DespicableMe'': Gru and Vector are not true adults, Gru has {{Freudian Excuse}}s and Vector still toys with his superweapons. Gru will become a true adult after the movie.
%%* Bert in ''Film/{{Mary Poppins}}'' acts free spirited and childlike at times, but usually in an endearing way.
* Brand in ''{{Film/The Goonies}}''. He spends the first act of the film trying to keep his little brother and his friends in line, but he eventually gets swept up in the adventure as much as the rest of them.
* Mac ''and'' Kelly in ''[[Film/{{Neighbors2014}} Neighbors]]''. Leads to a pretty humorous argument where he feels [[DoubleStandard Kelly]] [[ParentingTheHusband should be]] [[WomenAreWiser the responsible one.]]
* ''Film/XMenFilmSeries'':
** ''Film/XMenFirstClass'': Raven would rather hang out with the adolescent mutants than with Charles and Erik even though her age is much closer to the two men's.

%%* Remedios The Beauty from ''Literature/OneHundredYearsOfSolitude'', combining with SoBeautifulItsACurse to maximum effect.
%%** This is in stark contrast with her namesake and technical ancestor Remedios Moscote, Colonel Aureliano's late wife, who was WiseBeyondTheirYears.
%%** For added irony, Colonel Aureliano is the only Buendía who does ''not'' view Remedios the Beauty in this way, and instead he insists that she's as lucid as someone who's just come back from a decades-long war.
%%* Done very creepily with Pearl in Joy Williams' ''The Changeling''.
%%* The ''Literature/XWingSeries'''s Wes Janson is often said to be like this; he enjoys life wholeheartedly and likes pranks, puns, and having fun without caring about dignity. A fellow pilot once says that getting him up to the mental age of twelve, maybe thirteen would be impossible. For all that, though, he does know how and when to put on a straight face and get serious. In combat, he's actually something of a ColdSniper.
* In ''Literature/{{Diary of a Wimpy Kid}}'', almost all of Rowley's friends are little kids.
%%* ''Literature/InDeath'': Bart Minnock from ''Fantasy In Death'' was apparently this. It might explain why his murder particularly stuck in Eve and Roarke's craws.
%%* Mollwitz in Daniel Kehlmann's ''Literature/{{Fame}}''.

* Gordy the janitor on ''Series/NedsDeclassifiedSchoolSurvivalGuide'' who helps with many of the main characters' [[ASimplePlan simple plans.]]
* Spencer from ''Series/{{iCarly}}''. Worse, he's a [[PromotionToParent Promoted To Parent]] older brother to the main character. Yeah...the only parental figure Carly has is more of a kid than she is. At least she's a high schooler, starting with season 2.
%%* Lorelai Gilmore of ''Series/GilmoreGirls'' sometimes was this, especially in earlier seasons. Kirk was a more severe example.
%%* In ''Series/PowerRangersRPM'', twin [[SixthRanger Sixth Rangers]] Gem and Gemma and to a lesser extent, Dr K, exhibit traces of this trope, due to their childhoods being spent in a think tank producing weapons for the military, never being allowed to interact with other people. This all creates a surprisingly subtle creepy undertone as you realize that, as wacky as these characters are, they have suffered a certain amount of psychological damage...
* Despite being an over-1100 years old Time Lord, the Doctor in ''Series/DoctorWho'' demonstrates a few of these trait, in particular the Eleventh Doctor who is a ManChild and very close to children.
** As befitting the Doctor's foil, the Master (especially when played by Creator/JohnSimm) is something of a PsychopathicManchild.
** The Doctor is the man who responded to Amy Pond saying "[[SillyRabbitIdealismIsForKids I grew up]]" with "Don't worry, I'll soon fix that" and who uttered the following quote back in his Fourth Doctor days:
--> '''The Doctor:''' There's no point in being grown up if you can't be childish sometimes.
** The Twelfth Doctor begins showing some of these traits in his second season travelling with Clara Oswald, dressing more casually and gaining an interest in rock and roll and electric guitars. In one episode he also openly addresses Clara as he would a teacher.
%%* FDR from the backwards episode of ''Series/{{Seinfeld}}''. He wants Kramer to drop dead, and he wishes on anything he can (wishbone, fallen eyelash, shooting star, birthday cake) that Kramer would drop dead. [[spoiler: This is because Kramer hit him with a slushball two years earlier.]]
%%* ''Series/{{Psych}}'' has main character Shawn Spencer.
%%* ''Series/MrBean'' has been described by Rowan Atkinson as being a fully-grown man with the mentality and maturity of a 9 year old boy.
%%* Michael Scott from ''Series/TheOfficeUS''. Explicitly referred to in one of Pam's talking heads in during the "Michael Scott Paper Company" arc.
%%* ''Series/RulesOfEngagement'': Adam has devolved to this, especially in non-work related scenes, thanks to {{Flanderization}}.
%%* [[Series/{{Castle}} Richard Castle]] is this, along with his own mother, who is arguably worse than he is. Alexis, Castle's teenage daughter, is undoubtedly the most mature of the three.
* {{Pee Wee Herman}}, obviously.
%%* Creator/SarahSilverman in ''Series/TheSarahSilvermanProgram''.
%%* [[Series/TheAdventuresOfPeteAndPete "Artie! The Strongest Man...In The World!"]]
* Cliff Huxtable of ''Series/TheCosbyShow'' may be a doctor, but he often has childlike traits. Mostly he uses them only around children.
%%* In ''Series/TheKidsInTheHall'', Bruce tended to play these kind of characters. His monologues tended to be grown men with overly naive and idealistic views and prone to flights of fancy, including [[http://www.youtube.com/watch?v=8avnmkaJI3s "If Elvis Were My Landlord"]].
%%* The three hosts of ''Series/TopGearUK'' can get like this, especially when they're in one of their competitions and start messing with one another, although Jeremy Clarkson is usually the quickest to start acting like this with the least amount of prompt.
* Gibson in ''Series/ANTFarm'' acts in this way most of the time. He seems to have a mental age below that of the kids - even assuming the [=ANTs=] were regular highschoolers, let alone of an age when they'd normally be at middle school.
* Dr. Rodney Mckay from ''Series/StargateAtlantis'' is one, so much so that in one episode a little girl brattier than him calls him out on it.
* Fran Fine from ''Series/TheNanny'', which is one reason she's such a great nanny to the Sheffield children.
* [[HotWitch Winnie Goodwin]] from the short-lived ABC show ''Series/FreeSpirit''. In addition to providing the page quote, Website/PlatypusComix [[http://www.platypuscomix.net/darkvault/freespirit.html has this to say about her]]:
-->''Winnie is centuries old, but in terms of development by human standards, she's in her early twenties -- in looks and in attitude. Not only does she understand the Harper children in a way most grown-ups fail to, she often has the same wants and desires.''

* ''ComicStrip/PearlsBeforeSwine'':
** Pig is eternally clueless and innocent compared to the [[CrapsackWorld world around him]]. All of his friends, particularly his roommate Rat, ridicule him for this.
** Rat himself can act very childish often, though in a more selfish, bratty way than Pig. An example of this is him separating himself and Pig into a "Cool Fence" and "Uncool Fence". Also, he prefers for people to give him what he wants, despite Goat and Zebra's urging to make him think otherwise.

* Wooten Basset from ''Radio/{{Adventures in Odyssey}}'' skirts on this trope. He has many child like interests and behaviors but he also retains a [[GeniusDitz perceptive intellect.]] It is implied that he acts the way he does out of choice, as his parents raised him to be as strict and disciplinary as possible, not allowed to experience the joys of childhood like playing outside or even having toys.
* Ray and Ed from the ''Podcast/PeacockAndGamblePodcast'' seem to both have this as their default setting. Ray, in particular, is obsessed with StarWars lego, and Ed frequently calls him out on the number of bizarre children's toys and memorabilia he has in his house - including a Gamorrean Guard's head, and a full-sized working replica of Gonzo from the Muppets. They both like to speak in a sort of blissful, giddy idiom, too.

* All the human characters of ''Ms. Bleep'' have regressed to this, having spent an unknown amount of time "trapped in school in perpetuity" with a robotic [[MisplacedKindergartenTeacher kindergarten teacher]] that gives them an electric shock every time they leave or misbehave. Cindy, the resident brown-noser, doesn't even seem to remember the outside world or the fact that she's an adult, and [[spoiler:has no way of comprehending the death of a fellow captive.]] The other two are trying to escape, but they're still jarringly childlike in regard to such subjects as cookies and naptime.
* Mary in ''Vanities'', mainly due to her [[DarkAndTroubledPast difficult childhood]]. She finally matures in the finale of TheMusical.
* Weston Hurley in Lanford Wilson's ''The Fifth of July'' could certainly qualify.

* Felicia the [[CatGirl Catwoman]] from Capcom's ''VideoGame/{{Darkstalkers}}'' saga has been slowly transformed into one of these, as newer games shows her throwing kiddy tantrums, being dense as a brick, losing her head for a piece of food and hanging around with kids like Klonoa (in ''VideoGame/NamcoXCapcom''), behaving exactly like him. The weird part? Even if she is genuinely friendly and never holds any ill intention, you must remember that ''she's 41 years old.'' The original description says catgirls age by about half the speed of a human. Technically, she's 14.
* The "Child at Heart" perk in ''VideoGame/{{Fallout 3}}'' gives assorted bonuses to interactions with child characters.
* Alistair from ''VideoGame/DragonAgeOrigins''. While courageous and noble and all, his main party gifts are action figures. The Feast Day DLC gives him Grey Warden Hand Puppets that you can watch him play with.
-->'''Alistair''' (upon pulling out his dollies): "What's that? You want me to ''be quiet''?!"
* Possibly Lord Roth from ''VideoGame/InfiniteSpace''. Well, he is really competent that he becomes one of the top zero-G dogs in the universe, but personality-wise, he fits this trope.
* ''[[Characters/MrDriller Taizo Hori]]'' from ''VideoGame/MrDriller'' and ''VideoGame/DigDug'', is as energetic and dumb as a little kid, he even throws childish tantrums when he doesn't get proper recognition. Quite funny considering he's the oldest of the main cast being ''45 years old'' It's probably the reason why his wife left him.
* ''VideoGame/{{SoulCalibur}}'''s Xianghua has a prone move that for all intents and purposes, appears to be a childish tantrum.
* Any adult Sim on ''VideoGame/TheSims3'' that has the "Childish" trait will play with toys, get along better with children, hate doing adult things (like working), and like to make faces at people. This trope also counts when it is a Teen or Elder sim. They are also able to fish in swimming pools.
* Meredy in ''VideoGame/TalesOfEternia''. [[spoiler:Ten years before the start of the game, she witnessed her father Balir's murder at the hands of a group of people he and Meredy's mother Shizel thought they could trust (including Shizel's brother Hyades). In her grief and anger, Shizel was left open to possesion by [[EldritchAbomination Neried]] and annihilated everyone in the area save Meredy and Hyades due to them having the same potential to be possesed. In response to all of this, Meredy essentially froze her mind in the state of a six year old's.]]
* ''VideoGame/HometownStory'' has Sue the witch who's two centuries old, looks like a young teenager at the oldest and is frequently seen playing with the two young boys among the characters, one of whom has a crush on her. The game has an event during which the village lumberjack considers giving wood to the kids (including Sue) so they can have a bonfire, but only feels comfortable doing it if they are supervised by the PlayerCharacter (an ordinary human older teen or young adult).

[[folder: VisualNovels]]
* In ''VisualNovel/PhoenixWrightAceAttorney'', Maya Fey very much fits the bill (even when she is 17 in the first game), most prominently her complete obsession with children's television programs, which Phoenix notes in the 3rd game. The fourth game hints that she hasn't changed in ''nine years'', given that she would be 26 by that time. In the first game she argues with a seven-year-old about said children's programs, and in the second and third games she's often in the company of her eight/nine-year-old cousin, highlighting her childish personality.
* Taiga Fujimura in ''VisualNovel/FateStayNight''., who despite being an adult is almost always in the company of people younger than her, and her maturity level is the same as theirs if not younger. This means that [[ShooOutTheClowns she gets kicked out of the route]] around halfway through each time. Notable childishness: berserker fury over being called Tiger, challenging Saber to a fight and bursting into tears when she loses, the most overboard expressions in the game, and switching the labels on soy sauce and oyster juice. Notably, the visual novel shows that she only acts immature at home and is generally much more competent as a teacher.
* ''VisualNovel/DanganRonpa'' has Yasuhiro Hagakure, who's 20 years old while the other main characters are high school students (he was held back a few years). Despite being the oldest of the students, he's probably even more ditzy and immature than the rest of them.

%%* ''[[http://www.agameoffools.com A Game of Fools]]'': Joey, in spades:
%%---> '''Joey:''' Aww, why do we have to leave? That place was fun!
%%---> '''Adam:''' Because they were going to rape and kill us.
%%---> '''Joey:''' You ruin everything, Adam.
* In the LighterAndSofter Comicbook/{{Watchmen}} parody, ''[[http://envyskort.deviantart.com/gallery/#/d1y1h8p G-rated Watchmen]]'', the Watchmen characters are given the behavior and personalities of young children. The authority figures are treated as the "grown-ups", despite being around the same age as the main characters.
%%* For the God of [[ShockAndAwe Lightning]] and Sky, [[{{Godquest}} Volt]] can act like this at times. [[http://nixshadow.com/mspfa/?s=153&p=74 Case in point]].
%%* Ever since his transformation, {{Ratfist}}'s [[spoiler: severed tail]] has been an embodiment of his id, and will spit out every last thought that crosses his mind, conscious or otherwise. Often this hints that he never really grew up (which may explain why he's prancing about in a costume fighting crime); sometimes the hints are fairly benign ("I want to eat an entire pizza") and sometimes it suggests that ''kids can be really fucking terrifying''.
%%--->'''Ratfist''': Wait. I'm not afraid of that cat!
%%--->'''Milt''': Hey, neither am I!
%%--->'''[[spoiler:Tail]]''': Me neither! Let's eat it!
%%* Jared from ''Webcomic/ManlyGuysDoingManlyThings''. Exhibit A: [[http://thepunchlineismachismo.com/archives/905 here]].
%%* ''Webcomic/{{Homestuck}}'': It's strongly suggested that Mom Lalonde is like this. That impossibly frilly pink TastesLikeDiabetes bedroom and matching tea set Rose found in the [=SkaiaNet=] labs? Almost certainly Mom's.
%%* The pets in ''Webcomic/{{Housepets}}'' consistently have relationships with each other, organize events, and have jobs, and yet still act like children in the context of fun.
* Pinkie Pie in ''Blog/SliceOfLife'', who ends up being a confidante to the Cake twins as a result.

%%[[folder:Web Animation]]
%%* In ''BananaNanaNinja'', Baninja is a deadly ninja banana with a childlike naivete and curiosity about human society.

[[folder:Web Original]]
%%* Will from ''LookAVlog'' has elements of this, particularly when interacting with [[DeadpanSnarker Emily]].
%%* WebVideo/RhettAndLink have pulled some rather childlike shenanigans. In fact, their entire career is based on acting silly.
%%* The author of ''Webcomic/{{Hyperbole and a Half}}'' according to herself in [[http://hyperboleandahalf.blogspot.com/2010/06/this-is-why-ill-never-be-adult.html this entry]].
%%* ''WebVideo/TheAngryVideoGameNerd'' (James Rolfe)
%%* WebVideo/TheNostalgiaCritic is both this and a PsychopathicManchild.
%%** His other alter-ego, Chester A. Bum, is even more qualified for this role.
%%** Also, WebVideo/TheNostalgiaChick's ''MyLittlePony'' episode showed that her best friend [[ButtMonkey Nella]] still has (and plays with) her my little ponies. Things got dark pretty quickly though, we only see a bit but one is a hooker with a heart of gold, the stranger looking ponies are treated as freakish abominations, and there is at least one death (implied to be a suicide).
%%** Most of the Website/ChannelAwesome crew fits this to one degree or another. [[WebVideo/AtopTheFourthWall Linkara]] stands out, given that he collects Power Ranger toys.
%%* Much of the cast of ''WebVideo/ShinyObjectsVideos'', especially visible in "On The Couch".
%%* Mark, the host of ''WebVideo/ClassicGameRoom'', to the point where he has a separate channel devoted to reviewing toys.
%%* Jesse Cox of ''WebVideo/OMFGCata'' has frequently been called the most immature person ever by his comedy duo partner Creator/TheCynicalBrit, and he probably is.
* It's deconstructed in ''WebVideo/MyLittlePonyTheMentallyAdvancedSeries'': being One of the Kids does not make Rainbow Dash a good babysitter, as she encourages and takes part in kids' shenanigans, no matter how bad an idea it is. She got banned from babysitting her cousin's daughter because they ate ice cream for dinner and it ended with Dash hospitalized and the kid sick from the ice cream. It's later revealed that she has a court order barring her from being alone with children because of it, which nearly got her in trouble in ''Rainbow Dash Presents: Bittersweet''. [[spoiler:She got off because she wasn't ''intentionally'' watching the foals alone due to them deciding to run away from home.]]
* Pinkie Pie is one in ''WebVideo/FriendshipIsWitchcraft'' however it's due to her traumatic foalhood. Her [[ParentalAbandonment parents died]] when she was young and she was sent to an orphanage where she was treated poorly and emotionally absused for being [[FantasticRacism an Earth Pony]] and due to her Romani heritage. Twilight questions her about this when she goes Trick-or-Treating with foals.
-->'''Pinkie Pie''': I'm just a kid! I fit in!\\
'''Twilight Sparkle''': Pinkie Pie, didn't you already have a childhood?\\
'''Pinkie Pie''': No.

%%* ''WesternAnimation/TheFairlyOddparents'' has Timmy's parents, [[ParentalNeglect who would rather go out and have fun than take care of Timmy]].
%%** In the LiveActionAdaptation, Timmy himself becomes this so he can keep his fairy godparents.
%%* On the subject of Butch Hartman shows, Jack Fenton from ''WesternAnimation/DannyPhantom''.
* Captain Sunshine from ''WesternAnimation/TheVentureBrothers'' is a superhero whom is a parody of Franchise/{{Batman}}. [[MistakenForPedophile Everyone thinks he's a pedophile]] due to the way he acts around young boys; as it turns out he's just a big ManChild who's lonely after his first Wonderboy died.
%%* ''WesternAnimation/DextersLaboratory'': Dexter's Dad & Dexter's Mom portray this often too well.
* ''WesternAnimation/MoralOrel'' offers a rather creepy version of this. Doughy's parents, who must be somewhere in their ''thirties'', act, and dress like they're still in High School. This extends to their parenting,(If it could be called that) where they treat Doughy more like an AnnoyingYoungerSibling, than a son.
* [[ManChild The King]] from ''WesternAnimation/JellyJamm'' possesses no more maturity than his frequent playmate, [[TheCutie Rita]].
* Invoked in an episode of ''WesternAnimation/RockosModernLife'' where Mr. Bighead suffers a midlife crisis and attempts to get in on the fun with Rocko and his friends.
* Jake from ''WesternAnimation/AdventureTime'': okay, he's a dog, but he's twenty-eight in dog years. His best buddy is a fifteen-year-old.
* PlayedForLaughs on ''WesternAnimation/YoungJustice,'' when [[ComicBook/{{Shazam}} Captain Marvel]] is tasked with mentoring the Team. He adores them and repeatedly tries to hang out with them on missions and social events, while they treat him as either an intrusive spy from the Justice League or, at best, the way most teenagers would treat a grown man who acts like a ten-year-old. The joke, of course, is that Captain Marvel ''is'' a ten-year-old HenshinHero who transforms into [[OlderAlterEgo an adult superhero]], but neither the Team nor most of the Justice League know that.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** VagueAge aside, Pinkie Pie clearly has shades of this as demonstrated by her trick-or-treating in the HalloweenEpisode "Luna Eclipsed" and getting asked if she's too old for this.
--->'''Pinkie:''' Too old for free candy? Never!
** The second season episodes "Baby Cakes" and "A Friend In Deed" serve to demonstrate the more problematic aspects of this trope. In the former, Pinkie lacks an understanding of the responsibilities attendant to childcare, initially seeing the newly born Cake Twins as little more than new playmates and taking a full episode learning about what it means to actually be responsible for them. In the latter, she shows a strong lack of understanding about the importance of privacy and property, rooting through Cranky's possessions and forcing her way into his home, frequently ignoring pleas to stop.
%%* Soos from ''WesternAnimation/GravityFalls''.
* WesternAnimation/JohnnyBravo is a main-character example, who interacts with the neighborhood kids like he's one of them. He also lives with his mother like a child, but he's clearly an adult.
* Richard in ''WesternAnimation/TheAmazingWorldOfGumball''. He spends a lot of time with his sons and sometimes his daughter, mostly because he's a ManChild BumblingDad who doesn't have a job (and actually can't have a job or the universe will be destroyed).
* This appears to be WesternAnimation/UncleGrandpa's job. If he's interacting with someone he doesn't live with, he's probably helping a kid.
* The main character of ''WesternAnimation/BoJackHorseman'' is a deconstruction of immature grown men. Being in his fifties but having the mind and outlook of a teenager means he has an uncanny ability to relate to younger people and bond with them, but it also makes him irresponsible and much, ''much'' more susceptible to doing really silly things that put him in a bad spot or ruin his relationships with others. Plus, by hanging out with tweens and teens, people see him as a creepy, pathetic old man ([[ByronicHero which they might be right about]]).

* Websites with a membership system and a community that caters to something intended for a younger audience will inevitably have some members who are ''much older'' than said intended audience yet enjoy regardless. Since they tend to act the exact same as everyone else and are treated as such, it often comes as quite the surprise when the guy with the avatar of ''WesternAnimation/SpongeBobSquarePants'' doing the ''[[MemeticMutation Impossibru face]]'' who always makes typos turns out to be in his forties or something.