History Main / BewareTheQuietOnes

* ''VideoGame/TheDollShop'': The doll maker doesn't usually raise his voice and can be quite isolated from the other villagers, and [[spoiler:he's the one who kidnapped and murdered the little girl prior to the events of the game]].
* Edgar Ross of the ''VideoGame/RedDeadRedemption'' series. He barely speaks in his few appearances in ''[[VideoGame/RedDeadRedemption2 II]]'', but once [[spoiler:Andrew Milton kicks the bucket]], Ross descends on the Van der Linde gang with an army of Pinkertons, yelling threats through a megaphone. At this point, he's clearly fed up and just wants the gang dead. And while he's more talkative in ''[[VideoGame/RedDeadRedemption I]]'', the beware part is still very much present.
* After his blood oath to Ashe, Tryndamere from ''VideoGame/LeagueOfLegends'' seems to have become this. In "A Smoldering Coal", Sigra notes how in her initial time serving as Battlemaiden of Ashe, she felt disappointed of never seeing Tryndamere's legendary fury. He always acted as a very calm, if not bored, normal man. With nothing on his gestures or eyes that gave away his supposedly terrifying temper. That's it, until they were attacked by a traitorous Warmother and her warriors. Now, the thought of one day seeing Tryndamere angry again completely terrifies her.
* While he still has his ColdHam moments, Kazuma Kiryu from the ''VideoGame/{{Yakuza}}'' series is generally terse and reserved. If he ever seems to get really upset with someone, that person will soon be on the receiving end of a NoHoldsBarredBeatdown.

* The ''Franchise/Halloween'' series has the recurring antagonist of Michael Myers, who never speaks in any of the movies he's in. Every rendition of Michael has always been depicted as [[AxCrazy a violent, crazed murderer who commits acts of violence on a whim]]. The most he will do is a QuizzicalTilt when he is curious or looking over the aftermath of his butchering, but he won't ever talk.

* ''LightNovel/{{Durarara}}'': [[spoiler:Mikado Ryugamine is a great example of this trope. He may seem quiet and nice, but underneath he's quite unstable due to being a closet adrenaline junkie. He's the leader of the Dollars, for another. You do not want to tick him off.]]

* Blanc/White Heart from ''VideoGame/{{Neptunia}}'' is normally a [[TheStoic stoic]] SugarAndIcePersonality with a soft-spoken voice, but she'll become a [[HairTriggerTemper hot-headed]] and [[NoIndoorVoice loud-mouth]] LadySwearsALot when agitated enough, while her HDD form is aggressive and tough. Then there's the fact that she also wields a [[DropTheHammer giant hammer]] (or [[AnAxeToGrind axe]]) [[GlacierWaif to contrast with her petite appearance]].

* 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.

** His coworkers aren’t immune to underestimating him either. While he usually behaves impassively towards them, when Ginti attacks [[MoralityPet his assistant]], he [[NoHoldsBarredBeardown launches him through a glass aquarium]] and proceeds to throw *furniture* at him.

* ''Fanfic/TropePantheons'':
** Many of the gods. [[ManipulativeBastard Lucifer]] deserves special mention: Out of all of the participants in the aftermath of Madoka's downfall, he barely even showed up. But through a combination of good timing and a couple of well-placed verbal daggers, he [[spoiler:managed to convince Homura into joining his ranks, throwing the entire Pantheon and, to a lesser extent, the Magical Girl Sisterhood into utter mayhem. Who saw ''that'' coming?]]
*** Ironically, he becomes the target of this himself, by none other than [[spoiler:Rika Furude]], who [[spoiler:orchestrated the nearly successful assassination attempt on him, being driven to insanity by Lol Ranger and is via EnemyWithout indirectly responsible for Zenon's rampage nearly killing him again. The worst she got out of it in exchange was an ImpliedDeathThreat from [[IGaveMyWord Coyote]] [[AntiVillain Starrk]] warning her about doing it again unless Lucifer does something to directly harm her or her friends]].

** 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 on 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.

* Lampshaded by ComicStrip/{{Garfield}} in [[https://www.gocomics.com/garfield/2018/3/11 this strip]].

*** Ironically, he becomes the target of this himself, by none other than [[spoiler:Rika Furude]], who [[spoiler: orchestrated the nearly successful assassination attempt on him, being driven to insanity by Lol Ranger and is via EnemyWithout indirectly responsible for Zenon's rampage nearly killing him again. The worst she got out of it in exchange was an ImpliedDeathThreat from [[IGaveMyWord Coyote]] [[AntiVillain Starrk]] warning her about doing it again unless Lucifer does something to directly harm her or her friends]].

* ''Film/DeadPoetsSociety'': The shy and insecure Todd Anderson spends most of the film struggling to get out two full sentences and is overlooked by the school and his parents. [[spoiler: After his best friend kills himself, the school tries to bully him (and the other boys) into pinning the blame on their favorite teacher -- and he leads half the class in an outright rebellion against the headmaster.]]

* ''Film/OfficeSpace'': Milton Waddams might only be mumbling his threats, but he'll follow through with them. Especially when he says he'll [[spoiler: burn Initech down.]]

* ''Literature/TheHouseOnTheLagoon'': Quintín reads his wife Isabel's account their family history. She narrates the story of her ballet instructor's TeacherStudentRomance with her classmate; when it became public knowledge, his wife divorced him and he left town in disgrace. He deduces [[spoiler: that Isabel herself orchestrated the reveal during a recital out of petty jealousy and worries about what she is capable of doing if she were to think he didn't love her anymore]].

** And sometimes, if he loses consciousness, ???% comes out. This SuperpoweredEvilSide ([[spoiler:the subconscious manifestation of Mob's full potential]]) can extract the energy around him (even his enemy's psychic energy) and possesses insanely powerful psychic powers (though it mostly comes out to protect Mob).

* Blanc/White Heart from ''VideoGame/{{Neptunia}}'' is normally TheStoic with a soft-spoken voice and is pleasant to people around her. While she tends to keep her emotions and stress bottled up, [[RageBreakingPoint pushing her too far]] will cause her personality to ''drastically'' change into a [[HairTriggerTemper hot-headed]] and [[NoIndoorVoice loud-mouth]] LadySwearsALot. Then there's the fact that she's also TheBerserker with a [[DropTheHammer giant hammer]] (or [[AnAxeToGrind axe]]) [[GlacierWaif to contrast with her petite appearance]].

* The aptly named [[https://www.fanfiction.net/s/6450665/1/Watch-Out-for-the-Quiet-Ones "Watch Out For The Quiet Ones"]] has it with Mike Stoker. Mike is known for being quiet, unassuming, and mostly calm natured. However, in this fic, Johnny is trying to help a female friend in a domestic violence situation. The guy is still on the scene when the paramedics are called, and he has hurt her and stabbed Johnny. They can’t get away, but they don’t see Mike sneaking closer. He knocks the guy out cold with a single punch. He does break his hand doing it, but it left an impression. All he had to do when the guy started yelling and carrying on is go stand by his bed glaring at him, with his good hand in a fist, and the guy shut up fast. Even Cap and Chet both say to remind them not to make Mike angry.

* ''{{Series/Firefly}}'': Simon. Messing around with his sis is not a smart idea.

* The aptly named [[https://www.fanfiction.net/s/6450665/1/Watch-Out-for-the-Quiet-Ones "Watch Out For The Quiet Ones"]] has it with Mike Stoker. Mike is known for being quiet, unassuming, and mostly calm natured. However, in this fic, Johnny is trying to help a female friend in a domestic violence situation. The guy is still on the scene when the paramedics are called, and he has hurt her and stabbed Johnny and to everyone's surprise, it's Mike who knocks him out cold with a single punch. He does break his hand doing it, but it left an impression. All he had to do when the guy started yelling and carrying on is go stand by his bed glaring at him, with his good hand in a fist, and the guy shut up fast. Even Cap and Chet both say to remind them not to make Mike angry.

* 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]]?

* ''Fanfic/TropePantheons'':
** Many of the gods. [[ManipulativeBastard Lucifer]] deserves special mention: Out of all of the participants in the aftermath of Madoka's downfall, he barely even showed up. But through a combination of good timing and a couple of well-placed verbal daggers, he [[spoiler:managed to convince Homura into joining his ranks, throwing the entire Pantheon and, to a lesser extent, the Magical Girl Sisterhood into utter mayhem. Who saw ''that'' coming?]]
*** Ironically, he becomes the target of this himself, by none other than [[spoiler:Rika Furude]], who [[spoiler: orchestrated the nearly successful assassination attempt on him, being driven to insanity by Lol Ranger and is via EnemyWithout indirectly responsible for Zenon's rampage nearly killing him again. The worst she got out of it in exchange was an ImpliedDeathThreat from [[IGaveMyWord Coyote]] [[AntiVillain Starrk]] warning her about doing it again unless Lucifer does something to directly harm her or her friends]].
* ''Webcomic/HetaliaAxisPowers'' fanfic ''[[https://www.fanfiction.net/s/11886910/1/Gankona-Unnachgiebig-Unità Gankona, Unnachgiebig, Unità]]'': Japan is TheQuietOne in spades. Anger him enough, and he will show his ''true'' [[{{Samurai}} power]]. Just ask [[DrillSergeantNasty Germany]]. ''Despite being a full six inches taller and being a lot more muscular'', their [[CockFight fight]] was nowhere close to a CurbStompBattle.
* ''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!

* 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 putting 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]].
* ''Fanfic/BecomingLifprasir'': Dogsbreath has rarely seen Hiccup angry, so he was rather impressed that Mildew was able to do it in less than a minute.
** Snotlout thought it would be funny to make Ruffnut slip on ice while she was three months pregnant. Fishlegs then proceeded to have Snotlout strung up by his ankles naked. He refused to let him down until Stoick ''made'' him.

* In ''Fanfic/AmazingFantasy,'' Boomerang is a meek ExtremeDoormat who rarely speaks his mind but possesses unhealthy amounts of UndyingLoyalty to the Enforcers. According to Vulture, a slight against Clash sent Boomerang into a berserk rage in which he brutally murdered the offender.
* In fernwithys ''Fanfic/TheGoldenMean'' we get a glimpse of this with OCStandIn Paulin Gibbs (man to be the male morphling), in the sentences before his death, when he attacks Enobaria bare-handed and actually knocks her down before getting it InTheBack from a nearby Gloss.
--> '''Haymitch''': His usual vacant expression is gone, and for the first time since his games, I see the boy who won. He wasn't a clever player, but when he was raised to anger, he was terrifying.
* ''Fanfic/TheRigelBlackChronicles'': Aldon Rosier notes this tendency in "Rigel" and finds it ''fascinating''.
--> Underneath his lifeless facial expressions and almost insulting dismissal of anything that couldn't be diced, reduced, or boiled into unappetizing slime, Rigel was one of the most volatile things Aldon had ever encountered. Rigel Black didn't care, he didn't care, and then all of a sudden he ''did'', and Merlin help anyone standing in his way at that moment. Rigel Black had ''lines'', and the very instant one of his lines was crossed, his demeanor went from dormant to volcanic eruption in the space between heartbeats.

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

* ''VisualNovel/TheFruitOfGrisaia'': Sakaki Yumiko may be the least social of the Mihama students, usually keeping to her books or locking herself up in her room, however she is also the last person you want to piss off. That could easily result in an outburst of violence, making her draw her [[KnifeNut signature boxcutter]] and brandish it menacingly.

* 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.

* ''Podcast/FindUsAlive'' [DeconstructedTrope deconstructs]] this with Raddagher. She's quiet and reserved because she's isolating and overworking herself due to trauma, and her self-isolation leads to paranoia and a tendency to lash out when pressed.

* ''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.]]

** [[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]]]].

** Don't [[MamaBear mess with her friends]]. [[WhatAnIdiot Seriously, don't.]]

* 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 southerners wouldn't be able to do much about it anymore.]] Of course, the House Symbol should have been a hint. This very much contrasts with his more openly evil BastardBastard Ramsay.

* [[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]].

-->[[spoiler: '''Reven:''']] [[spoiler: '''[[SuperPoweredEvilSide What's the matter?! Afraid of the dark!?]]''']]

* [[Manga/MobPsycho100 Shigeo Kageyama]] is a quiet, timid, and physically underwhelming middle-schooler. But he has incredible PsychicPowers [[MartialPacifist even though he does not want to fight]]. But when his emotions saturate, his power increase immensely, and the emotion he is currently feeling flows out (and if you made him angry, good luck).
** And sometimes, if he loses consciousness, ???% comes out. This SuperpoweredEvilSide ([[spoiler:the subconscious manifestation of Mob's full potential]]) can extract the energy around him (even his enemy's psychic energy) and possesses insanely powerful psychic powers (though it mostly comes out to protect mob).

%% * ''Webcomic/{{Precocious}}'': It took a while, but Yvette has finally found someone to be nemesis to.

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 NoMoreHoldingBackSpeech. 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]].

* Ao Manaka in ''Manga/AsteroidInLove'' is often defined by how quiet she is, since she has a reluctance to speak due to past trauma. The one time when Mikage indicates she won't mind if Ao's ChildhoodFriend Mira got interested to geology and switches to the her side of the JapaneseSchoolClub[[labelnote:Background]]They belong to the Earth Sciences Club, which is recently formed by the merger of Geology and Astronomy clubs. Ao and Mira belong to the astronomy half.[[/labelnote]], however, Ao responds with such anger that her GirlishPigtails flies horizontally, and gives Mikage such big DeathGlare that sends Mikage crying TearsOfFear.
* 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.

* Franchise/LupinIII's colleague Goemon Ishikawa XIII barely says a word... preferring 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!!
* [[Manga/MobPsycho100 Shigeo Kageyama]] is a quiet, timid and physically underwhelming middle-schooler. But he has incredible PsychicPowers [[MartialPacifist even though he does not want to fight]]. But when his emotions saturate, his power increase immensely and the emotion he is currently feeling flows out (and if you made him angry, good luck).
** And sometime, if he loses consciousness, ???% comes out. This SuperpoweredEvilSide ([[spoiler:the subconscious manifestation of Mob's full potential]]) can extract the energy around him (even his enemy's psychic energy) and possesses insanely powerful psychic powers (though it mostly comes out to protect mob).
* Hinata in ''Manga/{{Naruto}}'', overlapping with BewareTheNiceOnes. She's one of the quietest characters of the series, [[ShrinkingViolet mostly out of shyness]], but when push comes to shove, she can push back, especially when it comes to defend her loved ones.

** 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.

* ''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.

* ''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.

* 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.

* Both Lola and her father in ''Film/TheLovedOnes''. However there is a major difference. Lola seems quiet and shy at first, but is actually very loud and wicked once Brent is captured. Her father on the other hand seems very reserved and quiet in personality, even when doing horrible things.

* Film/StarTrekIntoDarkness: After [[TheKirk Kirk]] died, Spock proceeds to beat the ever living crap out of [[spoiler:[[BigBad John Harrison/Khan]]]].

* ''Franchise/{{Tron}}'': Alan T. Bradley. Meek and harmless looking computer geek. Completely scrupulous. Won't even do his banking on company time. EstablishingCharacterMoment? Laying out in a perfectly calm and friendly manner that the software he worked on for months (the title character) is going to ''completely'' screw two of the antagonists as soon as he compiles the last upgrade and hits "run." He also seems meek, hamless and fatherly come the [[Film/TronLegacy filmed sequel]], but the first shot of him on-screen is showing him about defend young Sam from nosy reporters with physical force if necessary. Oh, and the "Flynn Lives" thing? He's been running the whole thing under everyone's nose. In the [[CanonDiscontinuity alternate sequel]] of VideoGame/TronTwoPointOh, he figures out how to crash a server ''from the inside'' just by analyzing the schematics. His son has to do the actual fighting, but AwesomeByAnalysis? You bet.

* 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.]]

* ''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.]]

* 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 southerners wouldn't be able to do much about it anymore.]] Of course, the House Symbol should have been a hint. This very much contrasts with his more openly evil BastardBastard Ramsay.

* 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.

-->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.'

* After his blood oath to Ashe, Tryndamere from ''VideoGame/LeagueOfLegends'' seems to have become this. In "A Smoldering Coal", Sigra notes how in her initial time serving as Battlemaiden of Ashe, she felt disappointed of never seeing Tryndamere's legendary fury. He always acted as a very calm, if not bored, normal man. With nothing on his gestures or eyes that gave away his supposedly terrifying temper. That's it, until they were attacked by a traitorous Warmother and her warriors. Now, the thought of one day seeing Tryndamere angry again, completly terrifies her.

** In ''The Final Cut'''s Moralist test, screaming at the Coalition Warship Archer that she's a 'stupid whore' and then going to Kim for his approval ("*Women*, am I right?") will ''not'' get his approval. Depending on his relationship with you overall, he'll either run out of steam after the rant and apologise for the intensity of his reaction, saying he really cares about you but wishes you would stop saying awful things, or he'll contemptuously tell you that the reason you make him so mad is because being in your presence is making him become like you.

* 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.

** [[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]], [[https://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.

* 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.