%% Image removed per Image Pickin' thread: http://tvtropes.org/pmwiki/posts.php?discussion=1466052087018022100
%% Please see thread to discuss a new image.

->''"When one person who is hardly ever upset about something, suddenly raises their voice, the world turns upside down and seems to come to an end...it is often the quietest lamb that can have the roar of a lion."''
-->-- '''[[WesternAnimation/PhineasAndFerb Ferb]]''', ''Fanfic/TheSeerPhineasAndFerb''

When most people think of TheQuietOne, they may also think ExtremeDoormat or ButtMonkey alongside it. Whether they are one or not (half the time they are only ''seen'' that way), subject them to one round too many of BreakTheCutie and the like, and, if it isn't preceded by a DeathGlare, they will give you a 'not so quiet' moment.

Alice seems to be TheQuietOne who keeps to herself. Bob sees her as an easy target and makes her his honorary ButtMonkey to abuse. After weeks of quietly taking this, Alice [[BreakTheCutie snaps]].

Maybe Bob pushed a [[RelativeButton certain]] {{b|erserkButton}}utton, maybe those [[HiddenDepths anger management classes Alice used to take]] are [[UnstoppableRage starting to wear off]], maybe Alice ''has'' [[BeneathTheMask been angry]] all this time, it just [[TheStoic never showed]] or no one took it seriously. Maybe this is her [[IsThisWhatAngerFeelsLike first time]] dealing with anger.

No matter which reason, what comes after is the same: An unleashed [[UnstoppableRage raging]] or [[TranquilFury cold]] speech of epic proportions that not even the most [[AxCrazy demented]] character in the story would want to sit through.

This rage is almost always expressed verbally, though [[LetsGetDangerous violence]] can also be included. Their verbal attack can differ from an ego-brusing TheReasonYouSuckSpeech, a mentally scarring [[BreakThemByTalking Breaking Speech]] or an emotional WorldOfCardboardSpeech. If they are also TheStoic, they might also ask the offender "DidYouThinkICantFeel" before ranting about all they have been put through. One might also catch [[PrecisionFStrike a swear or two]].

Another version could be when the heroes' team is in low spirits, and TheQuietOne, fed up with all the sulking, [[FlippingTheTable throws the table (or something else) to the side]] and gives a RousingSpeech to their comrades.

Usually a SugarWiki/MomentOfAwesome when they are shown to finally [[{{Pun}} speak up]] for themselves, but can change depending on the character or the setting. For instance, TakeThisJobAndShoveIt can easily cross the line into GoingPostal if the quiet one ''completely'' looses it.

The main difference between Beware The Quiet Ones and its sister trope BewareTheNiceOnes is while the latter is known for their kindness, the former is known for their (near) silence, though they can overlap sometimes. See also BewareTheSillyOnes if they're a bit...well....strange.

Compare and contrast TranquilFury, where the character can range from [[GenkiGirl happy]] or [[TheStoic stoic]], but their anger is more quiet (but ''still'' dangerous).

Compare BeneathTheMask, ShrinkingViolet, LetsGetDangerous, LonersAreFreaks. See also RantInducingSlight.


[[folder:Anime & Manga]]
* ''{{LightNovel/Durarara}}'': [[spoiler: Mikado Ryugamine is a great example of this trope. He may seem quiet and nice, but underneath he's quite unstable. He's the leader of the Dollars, for another. You do not want to tick him off.]]
* Near-Invisible Canada from ''Manga/AxisPowersHetalia'' is a good example: ButtMonkey? Check. ShrinkingViolet? Yep! Giving [[BoisterousBruiser America]] TheReasonYouSuckSpeech? A true SugarWiki/MomentOfAwesome.
* Machinedramon from ''Anime/DigimonAdventure'' is a villainous version. Don't let his whispered [[CreepyMonotone monotone]] fool you; he's as powerful and sadistic as any of the other Dark Masters.
* Lupin the Third's colleague Goemon Ishikawa XIII barely says a word...preferfing meditation instead of jabber. Upset him or threaten his friends and he'll use his sword to slice your clothing off...or worse...before you can blink!!
* Tetsuya Kuroko from ''Manga/KurokoNoBasuke'' is a good example as well. Practically invisible, he doesn't really talk much and people don't notice him. But if you try to dirty the game of basketball [[UnnecessaryRoughness through nasty tricks]]...
* Bertolt Hoover from ''Manga/AttackOnTitan'' is a soft-spoken ExtremeDoormat with absolutely dismal self-confidence. He spends much of his time lingering around the others awkwardly, and rarely offers more than a few words. He's also a highly skilled soldier, graduating 3rd in his class, and [[BerserkButton fiercely]] protective of the people he cares about. [[spoiler: He also happens to be the SecretIdentity of the Colossal Titan, and as such a PersonOfMassDestruction responsible for wiping out 20% of the human race. While remorseful over it, he's fully prepared to do whatever is necessary to accomplish his mission]]. Beware the quiet ones, indeed.
* Ai Emma, the titular ''AnimeAndManga/HellGirl'' is the most reserved character in the series as her job requires her to suppress her emotions to the point where it is very difficult to make her angry... God help you if you actually succeed.
* Shiryu from Anime/SaintSeiya is a softspoken GeniusBruiser with lots of common sense and a great devotion to his Master, his ChildhoodFriend, his Goddess of liege and his TrueCompanions. He also represents the Dragon constellation and wears the Dragon Cloth... and according to Shiryu himself, the Dragon is calm and wise until those he cares for are threatened/hurt/killed/etc. in any way. Guess what happens to Shiryu whenever this happens? And even more so if either his Master or ChildhoodFriend are the one in danger...
* Rinne from ''Anime/VividStrike'' was a ShrinkingViolet who tended to avoid attention and became the primary target for a trio of bullies at school. She tries to endure it for a few months, [[spoiler: until they knocked her out when her grandfather was dying, [[NeverGotToSayGoodbye keeping her from seeing him one last time]]. The next day she gave them a brutal yet [[AssholeVictim well deserved]] NoHoldsBarredBeatdown.]]
* ''Manga/SailorMoon'' examples:
** Hotaru Tomoe/Sailor Saturn is the calmest and quietest out of shyness. She also has the ability to annihilate any life form on Earth and neighbouring planets by dropping her scythe, and in the manga has verbally destroyed two girls who were trying to take her spot as Chibiusa's best friend.
** Michiru Kaioh/Sailor Neptune is usually the calmest and quietest after Hotaru. The few times she loses her cool, however, she becomes absolutely murderous, and in one occasion she had to be kept from killing Yaten for hitting a previously unknown BerserkButton of hers-namely ''[[DisproportionateRetribution criticizing her choice of lipstick and stealing her spot as the school's make-up expert]]''. Fittingly, she's Hotaru's adopted mother.
* [[Manga/MobPsycho100 Shigeo Kageyama]] a quiet, timid and physically underwhelming middle-schooler. But he has incredible PsychicPowers even though he will not fight. But when his emotion saturate, the emotion he is currently feeling flows out (and if it is anger, prepare to get your ass kicked).
** And sometime, if he loses consciousness, ???% Mob comes out. [[SuperpoweredEvilSide This monstrosity]] can extract the energy around him (even his enemy's) and is just mindlessly attacking any possible threat.

[[folder:Comic Books]]
* ''ComicBook/{{Exiles}}'':
** Fans of Blink may not know that she was introduced on Earth-616 during the Phalanx Covenant as a very shy, introverted girl named Clarice Ferguson who was terrified of her own powers. When she finally cut loose, she [[OneHitKill killed]] the formerly unstoppable Phalanx unit that had been holding her and a group of other young mutants captive... at the cost of her own life. The Blink who joined the Exiles was from an [[ComicBook/AgeOfApocalypse alternate timeline]].
** [[ComicBook/GenerationX Monet St. Croix]] was introduced in the same storyline, and also fit the trope. She spent most of her first issue silently studying Phalanx technology until she could identify the impostor hiding among her fellow mutant prisoners. Then she hit him with a MegatonPunch and led a breakout. Even cooler than it sounds -- she appeared to be ''catatonic'' at first. Turns out this was just a super-intense state of concentration, and she'd worked everything out... look out, Phalanx.
* ''ComicBook/{{Batgirl 2000}}'': Cassandra Cain was originally mute, and after learning speech she doesn't talk much. That's because her dad taught her to talk with her ''fists''. Heaven help you if you get her mad.
* ''Franchise/SpiderMan'': The Spot used to be a Spider-Man villain known for being largely ineffectual and mouthing off. Then he got trapped in the dimension he teleports through. Now he's mute, insane... and probably one of the deadliest killers alive.
** Spider-Man himself usually [[YouFightLikeACow cracks jokes and makes insults]] while fighting bad guys. But when Spidey ''stops'' talking, it's a sign that he's really, ''really'' pissed off... and that whoever's responsible is in for a really bad time.
* ''ComicBook/TheInhumans'': Black Bolt. Whenever he utters a sound, it destroys things on a major scale. That is to say, a whisper from him is on the level of a nuke.
* ComicBook/{{X 23}} rarely spoke at all in her first appearance (''ComicBook/{{NYX}}'') and origin story, (''Innocence Lost'') and even after is a laconic girl who generally shuns the company of others. She's also a highly-trained assassin and one of the most dangerous killers in the main Marvel Universe. God help you if you harm one of the handful of people she ''actually'' cares about.

* Lampshaded by ''ComicStrip/{{Garfield}}'' in [[https://garfield.com/comic/2018/03/11 this strip]].

[[folder:Fan Works]]
* ''Fanfic/ACrownOfStars'': Rei was always quiet, unemotional and physically unimposing. Then she got pissed off with Asuka after a CatFight and destroyed a dimensional portal to prevent Shinji and Asuka from leaving their homeworld... a dimensional portal built by a god!
* ''Fanfic/AdviceAndTrust'': Rei is a calm, collected, soft-spoken person. During the entire battle against [[spoiler:Zeruel]] she acted in a determined but non-aggressive fashion. Then [[spoiler:the {{Robeast}} tried to strike Shinji and Asuka.]] She went full-on berserker on its posterior, completed with glowing red eyes and furious snarls and growls.
* ''Fanfic/TheChildOfLove'': Rei is usually tranquil, quiet and passive. Then [[spoiler:Gendo threatened her niece, Shinji's daughter.]] Explosions and violence followed.
* ''Fanfic/DoingItRightThisTime'': Rei was calm, reserved and little communicative. Then she got sent to the past, and she was feeling suitably angry. She slapped Gendo to pay him back for mistreating Shinji and several months later tore an EldritchAbomination apart to vent her anger.
* ''Fanfic/{{HERZ}}'': Rei is usually quiet, calm and non-confrontational. Then a pack of loonies tried to shoot her niece. The cleaning crew had to scrub their remains off the walls.
* ''Fanfic/TheOneILoveIs'': Rei was a quiet, calm EmotionlessGirl seldom spoke and obeyed her Commander's orders without question or hesitation. But if something or someone threatened Shinji or her relationship with him, she became hostile and even violent... especially to Asuka since Shinji was falling for her. Her relationship with Asuka became very strained and belligerent until [[spoiler:they got a very bitter argument and a pretty virulent CatFight.]] Although that fight ended in a stalemate Asuka noted Rei was very quiet but she could be quite savage and hit hard if provoked.
* ''FanFic/RosarioVampireBrightestDarkness'': Dark Kuyumaya is very much TheStoic, rarely expressing emotion or even talking much. This hasn't stopped him from hospitalizing several bullies at Yokai Academy or going OneManArmy on a Fairy Tale squadron.
* ''Fanfic/SomeSemblanceOfMeaning'': Vale is usually TheQuietOne and ShrinkingViolet but don't piss her off.
* Brandon in ''Fanfic/BetrayMeNot'' talks very little and only speaks up when it's really necessary like in the [[Anime/{{Gungrave}} anime]], but once his BerserkButton is pushed too hard, he'll turn into a ScreamingWarrior, and if there's a gun nearby, [[ThereIsNoKillLikeOverkill he'll unload everything at you]].
* Rei in ''Fanfic/TheSecondTry'' isn't a violent person. She's pretty much emotionless, very quiet and talks little. However, [[spoiler:threaten her niece]] and she’ll make you wish you’re dead.
* ''The Sanctuary Telepath'': Janine doesn't speak much but don't let that fool you - by the time you'd start put your plan in motion she's already seen everything about it in your mind and taken the necessary steps. Perks of being a telepath and all.
* ''FanFic/HerInnerDemons'' analyzes Sci-Twilight's OneWingedAngel transformation during climax of ''WesternAnimation/MyLittlePonyEquestriaGirlsFriendshipGames'' as this. Sci-Twi grew increasingly vindictive toward her classmates, to the point where she sought power to fight back, [[CorruptTheCutie enough to become Midnight Sparkle]].
* As the title suggests, ''Fanfic/AlwaysTheQuietOnes'' involves Sunset and the other Rainbooms becoming convinced that Fluttershy is really a [[SerialKiller psychotic killer]].

[[folder:Films -- Live-Action]]
* Matsu, the main character of ''Film/JoshuuSasori'', has a knack for [[{{Determinator}} patiently and silently enduring whatever mistreatment gets thrown her way]] and waiting for just the right moment to unleash violent revenge on those that wronged her. This is why she is called ''Sasori'', or "Scorpion."
* Gaear Grimsrud from ''Film/{{Fargo}}''. He hardly ever says a thing throughout the entire movie (something {{lampshade|Hanging}}d early on by Creator/SteveBuscemi) but if provoked or put in a situation where he might get caught... well, let's just say that you don't want to be near him and a gun. [[AxCrazy Or an axe for that matter...]] [[spoiler: [[LudicrousGibs or a woodchipper.]]]]
* Film/StarTrekIntoDarkness: After [[TheKirk Kirk]] died, Spock proceeds to beat the ever living crap out of [[spoiler:[[BigBad John Harrison/Khan]]]].
* In ''Film/{{Ghostbusters 1984}}'', Walter Peck shuts down the power to the Firehouse despite Egon's dire warnings that it would be like dropping a bomb on the city. This results in an enormous explosion and hundreds (possibly thousands) of ghosts being released back into New York all at once. Peck orders some nearby police to arrest the Ghostbusters, claiming they were directly responsible for causing the explosion. Egon ''[[OOCIsSeriousBusiness completely loses it]]'', screams "[[YourMom YOUR MOTHER!!]]" and has to be ''physically restrained from tearing Peck apart with his bare hands.'' Remember, this is Egon Spengler!
* ''Film/OfficeSpace'': Beware Milton. Or he'll [[spoiler:set the building on fire.]]
* ''Film/{{Thor}}''[='=]s antagonist, Loki, started as the often pushed-aside, quiet, intelligent younger brother who was given too much power at exactly the wrong time.
* ''Film/TheDrop'' has Bob, who though meek rarely gets rattled. And when he's given reason to fear for those he loves? Watch out.

* Literature/APracticalGuideToEvil has Eudokia, [[BadassBureaucrat The Scribe]]. She's usually found in the corner with a lapdesk, quietly catching up on correspondence or whatever. She's also essentially [[TheSpymaster the entire spy network for The Empire,]] and when it comes to not seeing her coming, she's said to be as dangerous as Assassin. A few words in the right ears at the right time, the correct paperwork filled out and verified — [redacted] was, officially, never even a little problem to have managed existing.
-->“Captain Jarad,” the Webweaver said, ignoring the Duni’s spluttering as her eyes sought out the Soninke who’d been about to be chewed out by her earlier. “Congratulations, you are now a commander of the Ater city guard.”\\
The young man saluted, hands shaking.\\
“What is to happen to Com- former Commander Barsina?” he asked.\\
Scribe met his eyes.\\
“I know of no such individual.”\\
A heartbeat later, an enterprising guard behind the former commander slipped a knife in the Duni’s back.
* Collin in Literature/HowToSurviveAZombieApocalypse
* In ''Literature/TheOutsiders'', Johnny was the most quiet and most law-abiding of the greasers but when [[spoiler: he sees his friend Ponyboy being drowned, he stabbed and killed the attacker.]]
* ''Franchise/HarryPotter'': Quirinus Quirrell is the nervous, mostly unnoticed and seemingly innocent character throughout the entire novel. However, at the end it turns out that [[spoiler: he has been possessed by [[BigBad Voldemort]] all along and has been trying to kill [[TheChosenOne Harry]] all through the book. However, he was probably being controlled by Voldemort by this time as he had been taken over after trying to seek him out to destroy him in his weakened state, trying to earn some respect from his friends and fellow school pupils that had laughed at him for so long.]]
** [[ShrinkingViolet Neville]] too. Screw with him, you're screwed.
** And then there's [[CrouchingMoronHiddenBadass Peter Pettigrew]].
* ''Literature/DarkLife'' has Pretty. Despite his name, he is ''not'' someone you want to annoy.
* Steapa from Creator/BernardCornwell's ''Literature/TheSaxonStories''. Quiet and originally believed by the protagonist to be a half-wit, he becomes an absolute killing machine in battle.
** And, in a more specific example, there was Steapa's complicated test of loyalty in the second book. Steapa's sworn lord, Odda the Younger, had ordered him to kill Uhtred (who had brought Odda orders from King Alfred to attack the Danes). Steapa accepts the orders without comment, stands up to face Uhtred silent and grim, then turns and kills Odda.
* Ben from ''Literature/TheLeonardRegime'' is much more reserved than most of the other characters, bur provoking him is never a good idea.
* Roose Bolton from ''Literature/ASongOfIceAndFire'' is one of the most powerful lords in The North, and bannerman to the Starks of Winterfell (the "good guys" of the series). His obsessive habit of leeching himself leaves his voice very weak and whispery, so that everyone has to lean in to hear him speak during strategy conferences, and he loses the first battle he's sent to command in. [[spoiler:Later, he betrays and personally murders his liege, King Robb, and is declared the new Lord Paramount of the North. It turns out he was working for Tywin Lannister all along, and kept over half of Robb's troops sitting on their asses for the war, later sending most of them to die in a pointless fight. Even the Lannisters underestimate him, as it turns out that after Tywin Lannister's death and the complete anarchy that falls upon the kingdoms, Bolton may be considering declaring himself the new King in the North and seceding, since the southeners wouldn't be able to do much about it anymore.]] Of course, the House Symbol should have been a hint.
* Creator/TheodoreSturgeon 's short SF story "Extrapolation" was originally published under the title "Beware The Fury", as in the phrase "Beware the fury of a patient man". Wolf Reger is a brilliant but aloof and antisocial scientist/astronaut and humanity's future depends on his actions. [[spoiler: When he is captured by alien invaders , Earth's governments all think he has turned traitor. But he manages to destroy the alien fleet single-handled without even using a weapon.]]
* Beka Cooper, the protagonist of ''Literature/ProvostsDog''. While she's [[ShrinkingViolet paralyzingly shy]], she's very good at chasing down criminals and fighting. (She does become less shy, but rarely chatty.) She has also been known to blow up at people who have been frustrating her over a ''long'' period of time.

[[folder:Live-Action TV]]
* ''{{Series/Firefly}}'': Simon. Messing around with his sis is not a smart idea.
* ''Series/BuffyTheVampireSlayer'': [[BadassAdorable Willow]] and [[PapaWolf Giles]].
* ''Series/GameOfThrones'':
** In an unexpected moment of boldness, Sansa attempts to push Joffrey off the wall.
** In "Battle of the Bastards", Sansa executes Ramsay by having his hounds eat him alive.
* ''Series/PersonOfInterest'': [[BadassAdorable Reese]] tends to whisper when he talks. He prefers to let his actions speak for him.
* ''Series/BreakingBad'': the Cousins, a pair of assassins working for the Cartel, barely say a word in all the time they appear in the series.
* Ronnie Gardocki was by far the least noticeable or interesting member of ''Series/TheShield'''s Strike Team originally, but by the final seasons it was shown that his quiet demeanor hid a ruthless, ice-cold professional.
* ''Series/StarTrekTheOriginalSeries'': [[TheSpock Spock]] definitely. He may be TheStoic but don't screw with [[HeterosexualLifePartners his captain]] or the ship.
* ''Series/{{Merlin}}'': [[ShrinkingViolet Guinevere.]] Don't tick her off, don't mess with [[PlatonicLifePartners her friend]], or [[MamaBear betray her knights, or you'll get executed]].
* ''Series/StarTrekEnterprise'': Malcolm. Don't threaten his crew or his captain.
* ''Series/{{Sherlock}}'': If you don't want to get slapped by [[BadassAdorable Molly]], ''don't do drugs''. [[JerkwithAHeartofGold Sherlock]] [[WhatAnIdiot can attest to that.]] Really, he can. John witnessed this. And [[WhatTheHellHero called him out on his idiocy for it.]] [[WhatAnIdiot Understandable, he was an idiot for doing that.]]
** Sherlock might be TheStoic, and John might be ''very'' [[TheQuietOne reserved]], but don't mess around with them.
** Sherlock [[BadassBoast told Moriarty in no uncertain terms]] that if he harms any of his friends, he's pretty much screwed.
** [[TranquilFury And killed Magnussen]] [[WhatAnIdiot in front of everyone.]]
** We all know [[CombatMedic John]] killed [[spoiler: [[BadassAdorable two villains]] and [[TranquilFury threatened death]] [[WhatAnIdiot on one of them]]]].
** "[[TranquilFury Let him go]], or I ''will'' kill you."
** Also, Molly [[DidYouThinkICantFeel stood up for herself in "A Scandal in Belgravia"]].
* * The title character in ''Series/WilliamOfOrange'' has a nickname: William the Silent. He was called this for guarding his opinions and ever being pleasant to those around him. He later becomes the leader of the Dutch revolt against the Spanish king.

[[folder:Stand Up Comedy]]
* Dane Cook had a comedy bit where he talked about heist movies invariably having that one guy on the team who is a combination of this and PsychoPartyMember.
-->There's always that one guy on the team too, he was a last minute replacement. He's not one of the original gang. But one of the other guys vouches for him. 'No, no, dude... trust me, this guy's cool. He's solid and he's cool.' But he's not cool, is he? He doesn't really say anything ever, right? He just stands there, looks cool... and then at one point he might be like... 'Let's kill these bitches.'
* Creator/GeorgeCarlin [[DefiedTrope didn't think much]] of this trope.
-->"It's the quiet ones you've got to watch." You know that one, eh? Every time you see a story about a SerialKiller on TV, what do they do? They bring on the neighbor. And the neighbor says, "Well, he was always very quiet." And someone in the room says, "It's the quiet ones you've got to watch." This sounds to me like a very dangerous assumption. I'll bet you anything that while you're watching a quiet one, a noisy one will ''fucking kill you!'' Suppose you're in a bar and one guy's sitting over the side, reading a book, not bothering anybody, and another guy is standing on the front with a machete, banging on the bar, screaming, "I'll kill the next motherfucker who comes in here!" Who are you going to watch? You're goddamn right.

[[folder:Tabletop Games]]
* ''TabletopGames/Warhammer40000'':
** The [[KillerRobot Necrons]] are an entire army who used to lack the ability to speak wholesale (and mostly they still do), but even their most basic Gauss guns shoot what is essentially green lightning and can automatically wound on a dice roll of 6. They are also essentially Space Franchise/{{Terminator}}s -- they just keep getting back up after you think they're dead, putting themselves back together and continuing to march on your position until you or they are utterly annihilated.
** The Sisters of Silence, a little-seen AmazonBrigade army of the Imperium whose initiates take a vow of silence on entering the order and communicate through sign language from then on. They are still the Imperium's dedicated [[AntiMagic anti]]-[[PsychicPowers psyker]] specialists, and are able to [[DemonSlaying destroy Daemons]] with their grenades.

[[folder:Visual Novels]]
* Saito Hajime in ''VideoGame/{{Hakuouki}}'' is the quietest member of the Shinsengumi and the one who can always be depended on to follow orders scrupulously and faithfully. He's also ''the'' most lethal swordsman of the group and [[IaijutsuPractitioner practices iaijutsu]] specifically because it allows him to end most of his fights before his opponents know they've started.
* PlayedForLaughs with Mio from ''VisualNovel/LittleBusters''. On the surface she seems like a delicate, fragile EmotionlessGirl. And indeed, her physical stats are quite low. But she's very intelligent and downright ruthless at times, such as when she takes advantage of every slight lapse in attention on [[GenkiGirl Haruka's]] part during the newspaper fight and is able to hit her countless times, or when she performs an absolutely devastating take-down of Haruka's joke when they're only supposed to be performing a simple BokeAndTsukkomiRoutine.
* Kiryuu Moeka in ''VisualNovel/SteinsGate'' is a very socially withdrawn woman and prefers to let her text messages communicate for her instead of talking. Even when the person she's texting is literally standing right in front of her. [[SchmuckBait Take a guess]] at [[AxCrazy what]] [[UnstoppableRage happens]] when you [[BerserkButton steal her phone]].
* ''VisualNovel/MyHaremHeavenIsYandereHell'' has Kanna who is a reserved stoic. Oh, and she's one of three selectable [[{{Yandere}} yanderes]].

[[folder:Web Comics]]
* Finland from ''Webcomic/ScandinaviaAndTheWorld'' has this moment, where he shouts [[ClusterFBomb Perkele 306 times]] after losing to Denmark in hockey. Actually, he fits the trope pretty well in general, given that he's a chronically angry KnifeNut who rarely speaks.
* ''Webcomic/MegaTokyo'':
** Yuki Sonada kind of fits this trope (more since her magical girl abilities awakened, than in her earlier appearances). That is, assuming she's not just being stereotyped as an over-emotional teenage girl.
** So do Piro and Ping, but if pushed over the edge they can be [[RageBreakingPoint physically violent]], too.
%% * ''Webcomic/{{Precocious}}'': It took a while, but Yvette has finally found someone to be nemesis to.

[[folder:Web Original]]
* On ''WebVideo/StripSearch'', Katie Rice is absolutely the quietest person in the house, but it soon becomes clear that she's also one of the best competitors -- starting when [[spoiler:she wins two elimination challenges in a row]].
* The ''Franchise/{{Noob}}'' franchise has Ivy, [[SleepyHead narcoleptic]] and apparently not much more aware of what is going on when awake. But just try attacking one of her guildmates while turning your back to her...
* ''WebAnimation/DSBTInsaniT'': Asia doesn't say much and is very polite, but she will stab you with thorns if you push her too far.

[[folder:Western Animation]]
* ''WesternAnimation/GoofTroop'': PJ has occasionally gotten angry at his friend and dad, but other than that, he's quiet.
* [[BadassBookworm Raven]] from ''WesternAnimation/TeenTitans'' may be [[TheQuietOne reserved]], [[OhCrap but god help you]] if you ''really'' piss her off by [[BerserkButton messing with her friends.]] [[OhCrap It doesn't help that]] [[spoiler: she's [[HalfHumanHybrid half-demon]], and destined to cause TheEndOfTheWorldAsWeKnowIt]].
* Flora from ''WesternAnimation/WinxClub'' is sometimes thought to be a [[ButtMonkey pushover]] because of her [[ShrinkingViolet shy nature]], [[FriendToAllLivingThings hesitance to harm living things, and the nature of her powers]]. But time and again, she proves that nature is not so harmless, especially in ''Tears from the Black Willow'', when the Trix hit her BerserkButton. And who wants to bet that it's [[BerserkButton messing around with her friends]]?
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** [[ShrinkingViolet Fluttershy]] is the quietest member of the mane cast, on account of being, well, [[MeaningfulName shy]]. Then comes "The Best Night Ever". When she's avoided by the forest creatures of Canterlot... [[{{Yandere}} well]], [[http://www.youtube.com/watch?v=W7fQSBC4Ids see for yourself]]. Fluttershy in "Putting Your Hoof Down." Dear Celestia.... She displayed this way earlier, in "Dragonshy" and again in "Stare Master". "Dragonshy" is the episode where the fans learned that you do not mess with Fluttershy. From Season Four, [[Recap/MyLittlePonyFriendshipIsMagicS4E6PowerPonies "Power Ponies"]] demonstrates that you wouldn't like Fluttershy when she's angry.
** Don't [[MamaBear mess with her friends]]. [[WhatAnIdiot Seriously, don't.]]
** Also, Celestia help you if ''Big Macintosh'' raises his voice.
* The ''WesternAnimation/TransformersPrime'' version of [[TheBlank Soundwave]] speaks using others' recorded sentences ([[SilentAntagonist when he speaks at all]]), rarely ever has a major starring role... and can bash in heads with the greatest of ease, as [[DarkActionGirl Airachnid]] [[CurbStompBattle can attest to.]] He's the second-most feared Decepticon on the ''Nemesis'', right under Megatron himself, and with good reason. Knock Out even says "Watch out for the quiet ones" to Breakdown after Soundwave curbstomped Airachnid. [[OneManArmy Wheeljack]] fared slightly better against Soundwave than Airachnid did. But ''only slightly''. To put this in more perspective, Wheeljack had an easier time against ''[[TheDragon Dreadwing]].'' Soundwave is eerily silent when he fights, too. It's kinda CreepyAwesome.
* In ''WesternAnimation/TransformersAnimated'', Prowl definitely qualifies for this. He's a sleek, dark ninja who doesn't really like anyone else, prefers to sit in his tree and meditate.. but when he fights, he ''wins'', most of the time.
* Kenny from ''WesternAnimation/SouthPark'', normally both TheQuietOne and TheUnintelligible, certainly qualifies as of the "Mysterion" story arc. He says the most he ever does during these few episodes, and his BerserkButton is revealed; do NOT [[KnightTemplarBigBrother mess with his little sister]].
* ''WesternAnimation/{{Arthur}}'': Fern is very quiet, but she will go all out with revenge. She made Francine tear up (in Draw), and tricked Brain into thinking Giant worms were attacking Elwood city (War of the Worms).
* ''WesternAnimation/StevenUniverse'' features [[BrokenBird Lapis]] [[TrueBlueFemininity Lazuli]]. Barely taller than Steven, she's rather withdrawn and quiet- and also a [[MakingASplash hydrokinetic]] PersonOfMassDestruction who can lift the entire ocean at once. Her first appearance has her calmly introducing herself to Steven- and a moment later, one-shotting [[LightningBruiser Garnet]] with a huge hand formed out of water. Later episodes have her [[spoiler: fusing with Jasper]] to drag [[spoiler: their combined form]] underwater in a scene that calls to mind DraggedOffToHell.
* Ice Bear from ''WesternAnimation/WeBareBears'' is the most reserved out of the [[CharacterTitle three bear brothers]], but he is also TheAce of the trio and wields an axe. The "Icy Nights" episodes turn Ice Bear into a bona-fide action movie hero, showing just how dangerous he can be when he or the ones he loves are threatened.
* ''WesternAnimation/HeyArnold'': One of the kids, Curly, had been waiting to be the next ball monitor, but his teacher Mr. Simmons accidentally skipped him. Curly didn't take it too well. After everything blows over Helga remarks that the quiet ones showeuld never be trusted. Curly also framed Eugene for pulling a false alarm [[DisproportionateRetribution because he'd ruined his favorite pencil]].
* ''WesternAnimation/TheSimpsons'' has Maggie Simpson. On the surface, she's a voiceless baby who is the youngest child and (in comparison to everyone else on the show, especially her own family) has had little to no CharacterDevelopment, but has shown to be very loyal to her family and has saved them (namely Homer) on several occasions, is much more wily than she lets on and even knows how to fire a gun.