History BerserkButton / FanWorks

* ''Fanfic/MyHeroAcademiaUnchainedPredator'': Injure Miruko, better hope you have your will ready. When Wolfram seriously injures Miruko in Chapter 19, [[OhCrap Wolfram learns that the Slayer didn't like that at all, while Hawks and Miruko are left speechless and horrified]] [[CruelAndUnusualDeath when the Slayer breaks Wolfram's golem of junk, stomps on his organs and viciously headbutts him to oblivion.]] This is because Miruko reminds the Slayer of his wife Emily, and his rabbit Daisy.

** Carol is fairly touchy at first, especially about being touched or flirted with, but again, hurting friends and sexual harassment really piss her off ([[BirdsOfAFeather unsurprisingly]], she and Harry get on very well). The latter is also dialled up after she finds out the full extent of what happened in ''Forever Red''. Also sexism, though that has its roots in her phenomenal issues with her StepfordSmiler variant StandardFiftiesFather.

* In ''Cori Falls'''s fanfic series, insulting or harming Jessie is this for James (Domino found this out the hard way). For Jessie, it's insulting or harming James or saying anything bad about her deceased mother (Misty found this out the hard way). And the existence of [[RonTheDeathEater Ash Ketchum]], of course.

* ''Fanfic/VoyagesOfTheWildSeaHorse'': Shiki the Golden Lion absolutely ''despises'' the sea known as the East Blue, as well as anyone who comes from it. The instant he hears that a guest of his actually hailed from an East Blue nation, he goes from happy-go-lucky party animal to ''trying to murder her with his bare hands''. Although he ''was'' drunk, so a certain degree of AlcoholInducedIdiocy was involved, the sheer murderous rage stemming from the revelation was entirely from his loathing.
** He also hates storms, to the point that when one of his weather-reporters fails to predict a storm will buffet his FloatingContinent, he [[BadBoss shoots him on the spot]].

[[AC:''WesternAnimation/KungFuPanda'']]

** Seto Kaiba treasures a precious scarf that he wears all the time (it's from his mother and is used to hide that his neck was slightly snapped after he was hanged, ItsALongStory) and touching it is enough for him to snap. Better yet, harming his mother is enough for him to down right kill you.

** If there's anything the Dark Signers hate (specifically Yusei, Kiryu, Misty and Carly) it's abuse on children. This is one of the sole reasons why they give Himika Akaba a BreakTheHaughty procedure due to her abuse on Reira.

'''Safira''': Jolie, you will never talk about Xander that way again. If you do not get your ass out of this elevator and into the apartment I will forget that I am almost three feet taller than you and out weigh you by a hundred pounds and I will beat your ass into the ground.

** Harry is initially fairly relaxed, but after slowly becoming a ShellShockedVeteran, a few useful rules of thumb start to apply: don't be a bully, or your punishment will be ''creative''; don't sexually harass (or worse) someone especially after ''Forever Red'' [[spoiler: when, as the Red Son, he was repeatedly raped by Belova]] or at best, you'll be embarrassed, at worst... you don't won't to know; and related to the previous ([[MindOverManners psychic ethics]] and sexual/intimate consent are treated as very similar)... don't ask him to abuse his PsychicPowers, or do so anywhere near him - after one experience on the wrong end of MindRape, he's willing to kill.

** Carol is fairly touchy at first, especially about being touched or flirted with, but again, hurting friends and sexual harassment really piss her off ([[BirdsOfAFeather unsurprisingly]], her and Harry get on very well). The latter is also dialled up after she finds out the full extent of what happened in ''Forever Red''. Also sexism, though that has its roots in her phenomenal issues with her StepfordSmiler variant StandardFiftiesFather.

** Doctor Strange, by far the most dangerous character in the story, has three: don't condescend to him, don't suggesting that he might break his word (he has a self-imposed case of CannotTellALie), and don't harm children, especially not those he considers to be particularly under his protection. They respectively result in a savage ReasonYouSuckSpeech to a group of {{Physical God}}s and the threat of an AndIMustScream fate for the one condescending to him ([[spoiler: Zeus]]), a more or less explicit statement that if the person questioning his word had not been a child themselves, he'd have killed them on the spot, and an otherwise nigh-omnipotent being discovering thaat it is possible vomit up chunks of your own rotting soul.
* ''Fanfic/ChildrenOfAnElderGod'': Asuka was not enthused about touching --let alone fighting-- Amaliel. Then the aquatic cosmic horror bit her robot's hand off. Asuka bludgeoned it, torn ''its'' limbs off and then ripped flesh chunks off its body until she was sure it was very, very dead.

** Lelouch despises discrimination, and becomes angered if someone he loves is hurt in any way.

* ''Fanfic/CoreLine'': For recurring character Roger Hackett, it is insulting MegaCorp Stingray Industries and ''especially'' the CorporateSponsoredSuperhero team it sponsors, "The Champions". Don't even think about it, in any way, shape or form. Not even if the universe decided you're in the right. Because it won't matter if you're a super-duper-ultra-mega-hyper PhysicalGod SuperSoldier StockShonenHero with an army of followers or just a regular JerkAss -- if he ''likes'' you, or thinks you are ''indispensable'', he'll feel torn and guilty about his desire to make you pay, and if he ''doesn't''... then [[https://www.deviantart.com/art/CORELINE-Hackett-s-Berserk-Button-702897292 Heaven help you]].
* ''Fanfic/ACourierForKivotos'': Courier Six reveals to Hoshino that one of the main reasons he's helping Abydos High School is that bullies strong-arming helpless people triggers him, as it was a common yet, unforgivable occurrence in [[VideoGame/FalloutNewVegas the Wasteland]]. Once they discover that the [[PrivateMilitaryContractors Kaiser Corporation]] was the mastermind behind intentionally debt-trapping the school in a unsustainable feedback loop and attempting to drive the remaining students out via armed incursions, the Courier sets off on a RoaringRampageOfRevenge to personally demolish their operations in Abydos.

* ''Fanfic/TheDragonThatWillPierceTheHeavens'': It is not a good idea to threaten innocent people or the Straw Hats in front of Hikari, especially Luffy, Zoro or Chopper. This usually causes her to have a RoaringRampageOfRevenge against the person responsible, transforming into a DraconicHumanoid OneManArmy capable of taking down entire crews of pirates.

*** Keepers in general, due to what he experienced thanks to Mukrezar destroying his hometown. When he finds out Ami is a Keeper, he's perpetually either on the edge of exploding, or actually trying to kill her.

** Duran, after all that time dealing with District One, does not like or trust long black sedans. Also, he's not to keen on unverified intruders, like the mailman.

** Cu Chulainn gets upset when he finds out Archer has a copy of Gae Bolg inside Unlimited Blade Works, because it is left lying in a pile of other weapons instead of neatly stacked. Archer counters since his arsenal is unlimited, it's impossible to organize.

** Chloe personally has a dislike for curry and Pokémon, due to the years of emotional baggage attached with those things, and being called a princess as it makes her look weak and pathetic.

* ''[[https://www.fanfiction.net/s/11772125/1/Metroid-Kamen-Rider-Generations-Full-Series Metroid: Kamen Rider Generations]]'': [[Series/KamenRiderGaim Mitsuzane]] has few. One, do not remind him or bring up about the misdeeds he committed in the past. Two, don't touch him; Samus is the only ones who can do that. [[spoiler:Gandrayda learned the hard way]]. Three, threaten his friends and his brother is the easiest way to piss him off. And fourth, you don't make fun or insult Kouta on his ears. You'll ''regret'' it, Gou almost found out the hard way when he had to refer Kouta as [[FanNickname/{{Gundam}} Jesus Yamato]].
** Gou has two: (1) Insulting [[Series/KamenRiderDrive Chase]] in front of Gou will ask him to kick your ass. (2) Never, '''EVER''' mention the name [[AbusiveParent Tenjuro Banno]] when Gou is around, unless if you're Krim.

* In the ''WesternAnimation/{{Megamind}}'' and ''WesternAnimation/RiseOfTheGuardians'' crossover fic ''[[https://www.fanfiction.net/s/8772736/1/Protectors Protectors]]'', Roxanne's elder sister, Rikki, doesn't like it when adults threaten/use/discriminate young kids. To the extent that she punches ''her own mother'' when said mother makes an unwise move towards Roxanne.

* ''Fanfic/TheShieldsDragon'': Coming from the contemporary universe of ''VideoGame/{{Yakuza}}'', Kazuma Kiryu abhors any mention or act of slavery, even if he has to begrudgingly accept its existence in Melromarc as the norm. He even shoots Naofumi a DeathGlare when he first hears about Raphtalia's relationship with him, but stands down only when she speaks on the Shield Hero's behalf. Also, you ''will'' be sorry if you mistreat or abuse slaves in his presence, as the demi-human slave trader convoy passing by Lute Village one day can attest.

** Having lost so many friends and comrades in arms in previous battles, harming friends or family members is a pretty big one for Naomi, as Clemens learned the hard way. She's even willing to give up her career and risk court martial if it means she can get back at the ones who threaten someone close to her.

** Narrating is one for Katara (particularly when [[AdaptationalWimp Katarola]] is doing it). She also hates the scene in the Earthbender prison because of 1) the fact that Awng gets her inspiring speech and 2) the sheer stupidity of the scene in general.
*** She also flips out when Katarola [[spoiler: attempts to make out with Aang,]] understandably.

** Angela uses Spike’s old insecurities about how he compared to Angelus to try and provoke him into killing her before he can heal Drusilla; Buffy later suggests that Angela found it a lot easier to abuse Spike in the past compared to the effort he went to just to tie her down here (while unaware that Angela was a man at that point).

* ''Can't Get You Out Of My Head'' has Joker, who takes a very, very dim view of implicating him in something that he didn't do. as he put it:

** Harm a single hair on Corrine Bertrand's head OR his sister's head, and Caleb Zukov will show up with his demon's-blood based magic and a Desert Eagle to make you terribly sorry about it.

* Stephanie Brown/Spoiler puts up with a lot of crap in ''Fanfic/AngelOfTheBat'', but mocking the events of War Games (in which she was raped, tortured and forced to fake her death) is a surefire way to get your face broken. Just ask Scarab.

* Jordan James in ''[[https://www.fanfiction.net/s/13383335/1/SuperLife-Season-1 SuperLife: Season 1]]'' hates any and all forms of bullying due to [[AllOfTheOtherReindeer suffering from bullying so bad]] in the past that he needed to move to a new city. Not even his friends/teammates are exempt from his hatred, [[TheReasonYouSuckSpeech laying into the ones he caught laughing at Leslie's embarrasing videos]] and getting pissed at them after [[ArmorPiercingQuestion asking if they'd still laugh if he was in the video]] and realizing a couple of moments later ''that they're deciding''! At the end of the chapter, [[ForgivenButNotForgotten Jordan can't find it in himself to immediately forgive the Superhero Girls (barring Diana, who took no part in their behavior) for the way they acted]].

* In the Discworld of Creator/AAPessimal, it is not wise to display any racial prejudice in front of proud [[DarkestAfrica Howondalandian]] graduates of the Guild of Assassins. [[TheChiefsDaughter Miss Ruth N'Kweze]] is normally pleasant, easy-going and possessed of a pleasantly barbed sense of humour. But for a while she was a teacher at the Assassins' Guild School, and an [[AmoralAfrikaner White Howondalandian]] student who used the word "kaffir" where she could hear it soon realised his teacher was annoyed, and prepared to do more than throw the blackboard eraser at him. Horst Lensen still carries a slight scar on his throat where her sword was pressed against his vocal chords, just to make the point.[[note]]while angry, Ruth had enough self-control to be aware it would be frowned upon if she actually killed him. Not even the Assassins' School allows this to its teachers as a method of enforcing class discipline.[[/note]] Similarly, any anti-Cenotian slurs expressed where Miss [[BadassIsraeli Rivka ben-Divorah]] can hear them are usually met with telling retribution.

* In ''Time and Space'' by [=Eureka2000=], Epsilon's sore spot is the Time War and implying that she was anything like Rassilon and his followers.

* In the ''Fanfic/SkyholdAcademyYearbook'' series, the teachers at the eponymous school will get angry very quickly if anything endangers the school itself, or the other staff members, or worst of all the students. Varric has an extra one; don't even imply that you're a danger to either of "his girls" (the Hawke sisters), because he will ''end'' you. [[spoiler:Literally.]]

* In ''Fanfic/WhatAboutWitchQueen'', threatening Anna - or even suggesting threatening her - is a sure way to attract Kristoff's ire, and boy, fear his wrath. Also, any news about Hans are bound to make [[HairTriggerTemper Friedrich]] go full {{berserk|er}} and the same - although to lesser extent - applies to Anna as well.

** Vivienne Graham has a couple. These include mocking or questioning her ParentalSubstitute feelings towards Dr. Serizawa, and threatening her loved ones such as Madison Russell. It's also worth noting, directly visually reminding her of Ghidorah, the monster who psychically tormented her for years and [[OnlyMostlyDead ultimately killed her]], can set off her [[ShellShockedVeteran PTSD]] and the results of that can be ''messy''.

* ''[[https://archiveofourown.org/works/40975887/chapters/102689325#workskin Oh The Weather Outside Is Frightful]]'' reveals that Josuke has another berserk button besides insulting his [[AnimeHair distinctive hairstyle]], namely saying that his mother is lying about her snow-related trauma for attention, as Rohan found out the hard way. For clarification, both Tomoko's fears and Josuke's hairstyle came from the night they were nearly buried in a snowstorm while she was trying to get him to a hospital until a man with a pompadour (from who Josuke got his hairstyle) helped them get back on the road.

** The second one is someone bringing up her weight, as Uzu finds out, when she threatens to beat him up.

* ''Fanfic/ThePrivateDiaryOfElizabethQuatermain '': It's a bad idea to mess with Elizabeth Quatermain's TrueCompanions, because the rest of them will make sure you regret it. And it's a very bad idea to mess with Elizabeth herself, because Skinner might not let you ''live'' to regret it.

* ''Fanfic/FlowingStar'': [[NiceGirl Girl Jordan]] felt personally offended when Stella implied she was only interested in dodgeball when she was planting trees, but she calms down and apologizes for her outburst.
* ''Fanfic/GalPals'': The Squirrel Suit become this for Lincoln, to the point that seeing it throws him into a blind rage that he tears it apart in the middle of court.

** Keitaro ignores Motoko's GirlPosse harassing him, until they start insulting [[spoiler:his girlfriend]].

* ''Fanfic/LifeAfterDeathTrilogy'': Otto and Robin Octavius. Do not threaten their adopted daughter Mouse. Just... don't. If you're lucky, Otto will rip you to shreds with the help of four sentient, pissed off metal tentacles. If you're not lucky... Robin Goodfellow gets to 'play' with you.

** Izuku hates whenever anyone implies that anything serious is a joke. His entire life is nothing but a long, cruel joke, so he snaps at anyone who doesn't take things seriously enough. The first time he activates One For All is when Iida chastises him for muttering during the explanation of the exam and accuses him of not taking the exam seriously. This also makes him even more annoyed at Todoroki's attitude than in canon.

** Duran, after all that time dealing with District One, does not like or trust long black sedans. Also, he's not to keen on unverified intruders, like the mailman.

** On another instance, Shizuru is informed by her men that an Otomian had challenged Natsuki to a duel. Natsuki tried to anchor her in place, without much success, until she explained that she'd already dealt with the matter.

** Swift-Pad, and wolves in general, have one - once an apology's been made, that's it, no further ones needed on that subject. Bringing it up again is considered incredibly insulting since it implies that the other person forgave them too easily or that they didn't know what they were forgiving. Twilight accidentally triggers this for Swift-Pad, but once he explains about it, she promises to do better when it comes to learning such things so she won't accidentally offend others like she did him.

** When Princess Cadance is injured in the tenth chapter and the distraught Twilight Sparkle asks from the [[HeroWithBadPublicity disgraced heroes]] -- Celestia, Shining Armor, Spike and the rest of the Mane Six -- how they could have put her former foalsitter in danger, Celestia tries to pacify her by saying they didn't know it would happen. In response, Twilight -- whom [[TheUsurper Prince Jewelius]] has manipulated to [[CorruptTheCutie stop trusting her friends, brother and mentor]] for [[MadeOutToBeAJerkass their treatment of her at the wedding rehearsal]] -- [[TheReasonYouSuckSpeech lashes out at them all]], imprisons them in a magic dome, and coldly leaves them at [[TheBrute Commander Hildread]]'s mercy.
** [[BigBad Jewelius]] ''[[GreenEyedMonster really]]'' hates it when his cousin Cadance and/or aunt Celestia are openly praised/loved in his presence. This [[{{Foreshadowing}} first shows]] when he's still [[BitchInSheepsClothing pretending to be a nice prince]]; he glares angrily for a split second when Rarity praises the wedding of "the wonderful Princess Mi Amore Cadenza". After he has stolen the throne and made all the other heroes but Twilight public enemies, he gradually becomes more open about this. He eventually [[WouldHitAGirl smacks Twilight in the cheek]] when she insists him to pardon all the fugitives, and when Canterlot's citizens demand the same thing, he decrees that anypony who sympathizes with the fugitives will be accused of treason and severely punished.

** Kage in general get pissed off when the leaders of lesser villages are treated as their equals. This is actually what lead to the fall of Uzushiogakure, since Kuniotoko Uzumaki declaring himself to be the "Uzukage" during the Second Ninja War was considered so egregious that Kiri and Kumo (who were at war with each other at the time) joined forces to wipe them out.

** Asuka gets mad when someone tries to take Shinji away from her. After returning to their original timeline Rei presses that button constantly, sending Asuka in “apocalyptic” rages. In contrast, “people” as Winthrop, Jinnai or Barceló piss her off, but she displays cold fury towards them.

** Hurt Shinji, upset him or try to take him away from Asuka and she will plot your demise and look for places to hide your corpse. And Rei will assist her.

** Misato is a ''very'' overprotective MamaBear. Usually she acts self-controlled, calm and respectful when in presence of a superior. When she heard [[spoiler:Gendo was scheming something might kill one of her wards and would hurt the another]] she walked in his office to put a bullet in his head.

** Asuka has several buttons, most of them related to her husband: Do not flirt with Shinji, try to steal him away or act pervert around him. Asuka will ensure it is hazardous to your health. Do not poke fun at her relationship with Shinji, suggest to her face they have S&M sex or make Nazi jokes around her. Kurumi is constantly pressing the first button. Kensuke gleefully punches the second one every time he opens his mouth.

* ''Fanfic/TheOneILoveIs'': Do not even think about hurt or harm Asuka or Rei in some way, shape or form. Shinji… will not be nice to you. Unfortunately for them, [[spoiler:the MP-Evas]] did not get the meme.

** Asuka has several of them. It is NOT a good idea pulling a suicidal stunt during a friendly duel and getting her nearly killed, mock her or flirting with Shinji.

* ''Fanfic/TheOneILoveIs'': Do not even think about hurt or harm Asuka or Rei in some way, shape or form. Or else Shinji… will not be nice to you.
** Zeruel found out the hard way.
** And later [[spoiler:when he saw the MP-Evas munching the last remnants of Unit 02]] he went utterly nuts and tore them apart savagely.

* ''Fanfic/ScarTissue'': Do not insult Asuka, do not pick on her, do not threaten her and do not hit her in presence of Shinji. If you do so much as badmouthing her or being rude to her, Shinji... will snap.

* ''Fanfic/ThisBites'': In additon to canon Buttons, the fic has a few new ones thrown in.

*** Hypocrisy and [[NeverMyFault denying any responsibility for your own actions]] tend to be lower yield though no less provocative subjects for him. Usually when he gives a TheReasonYouSuckSpeech to any Marine officer it's either kickstarted or focused around one or both of these subjects. When Aokiji shows up Cross emphatically wants to avoid aggravating him for risk of might happen but when the Admiral tries twisting things in his BreakingSpeech to paint Robin in the worst light possible (which "conveniently" excised his role and misdoings in those events) Cross has enough and returns fire, delivering a tirade that ends with him bringing up ''exactly'' what Aokiji's old friend Saul would really think about his actions.
*** He didn't precisely lose it and was coming off of a massive blow-up, but Cross did get testy when Koala assumed that he had some FreudianExcuse for hating bigotry so much rather than that he was just morally opposed to it, immplying that something so fundamentally wrong had to be personal for him to hate it.

** Luffy '''hates''' "RapePillageAndBurn" pirates with a passion and sees them as fakers who give adventure seekers, that Luffy sees as the actual way pirates should be, a bad name. And lord help you if you dare to imply that kind of amoral behavior is what pirates are supposed to be like.

** Anything involving either the destruction of Flevance or Donquixote Doflamingo will rile up Trafalgar Law. [[BewareTheQuietOnes Even if he doesn't show it physicially.]]

* ''Fanfic/AForceOfFour'': Don't remind Badra that she was an one-time villain who disappeared after Wonder Woman kicked her butt once. She'll not take it well.

** For any of Ash's Pokemon, it is threatening his well being. Only now he has a [[OlympusMons Latios and Latias]] in his collection, and they are rather attached to him. [[spoiler: The Fearow finds this out the hard way, when Pidgeot decks him after he tried to kill Ash.]]
** Bianca has several. Don't ask her out in a perverted way, as Brock found out. Don't hurt Latios and Latias, and because of that she chews Ash out every time he uses them in battle.

** Ash's entire team go on a rampage when [[spoiler:Ash is shot by one of the grunts; Ash himself only survives because Natu put him into psychic stasis and teleported him to safety]]. Later on, [[spoiler:Charizard and Gabite/Garchomp are willing to tear through N with their bare hands when he tries to 'free' Charizard from Ash by destroying Charizard's Poke Ball by literally melting the ball in Ash's hand]].
** Ash is so determined not to be forced to go cross-dressing again to get into the Celadon Gym that he's willing to consider burning it down if Erika refuses to let him challenge her, and has a negative reaction to Mandi just wearing a kilt during the League conference. .

* ''Fanfic/ProfessorArc'': Jaune has gained so much popularity among Beacon's staff and students, that they'll react poorly to anyone who harms or hurts him in anyway. [[spoiler: [[TheStoic Blake]] becomes visibly enraged when Jaune's sisters vocally belittle the guy, and barely holds herself back from attacking them, and from intervening in Jaune's fight with his father. Even [[NiceGirl Pyrrha]] can barely contain her contempt for them]].

* Lady Stoneheart in ''Fanfic/TheNorthRemembers'' is cold, emotionless, to the point of being dead both figuratively and literally. Whether it be hanging [[spoiler:Freys]] or [[spoiler:witnessing a failed trial-by-combat or the reunion with her missing daughter]], Stoneheart never so much as makes an expression of relief, satisfaction, rage, or sorrow. However, during her little reunion with [[spoiler:Littlefinger, the man responsible for literally everything that happened to her family over the story, he makes the mistake of mentioning the Red Wedding and how it was only meant for her son Robb to be killed and for her to be ransomed back into his hands.]] She ''completely loses her shit'' and unleashes herself upon him, strangling the guy and nearly killing him before being stopped by [[spoiler:her daughter Sansa.]]
-->[[spoiler:Lady Stoneheart: ''"Robb? Robb! ROBB!"'']]

* Don't tease Tails in ''Fanfic/JourneyIntoDarkness'' about Cosmo's death if you know whats good for you, Shadow learned this the hard way.

* In ''[[https://www.fanfiction.net/s/10677407/1/Oblivion Oblivion]]'', Medusa smacks her younger sister Shaula around, and insults her fighting skills, plans, intelligence, and general competency, and Shaula remains relatively controlled through all of it. The second Medusa implies that Shaula was TheUnfavorite to their parents, she immediately [[TheReasonYouSuckSpeech loses her shit.]]

* While Jinn, from Fanfic/StarWarsLightInDarkTime, is already a bit AxCrazy to begin with (he's basically a sith convincing himself he's a Jedi), however, comparing him to Palpatine is just too [[{{EvenEvilHasStandards}} far]]. Similarly, hurting his friend's, especially [[{{BigBrotherInstinct}} Leia]], will [[{{UnstoppableRage}} make Luke explode]].

* In ''Fanfic/LearningToBreatheUnderwater'', the Crystal Gems won't tolerate anybody badmouthing Rose Quartz, espcially in front of Steven. Also, due to her time in the mirror, Lapis utterly ''hates'' being told what to do.

* In ''Fanfic/HellsisterTrilogy'', NEVER make puns out of Darkseid's name. The Dread Lord has NO sense of humor and doesn't mind obliterating the perpetrator since he can bringing the loud-mouthed idiot back to life as many times as he wants.

** Based off his reaction to [[spoiler:Leonard]] calling it a spell, Mike gets pretty offended when his disorder is treated lightly.

* ''Fanfic/UnbreakableRedSilkenThread'': Anyone insulting Cody in front of Heather. She even was about to confront Jasmine when she insulted Cody in chapter 11, even though Jasmine is at least three feat taller than her, and in chapter 15, smacked Gwen in the face for insulting Cody.

* ''Fanfic/TalesOfTheUndiscoveredSwords'': You can hit Hinata Aoe anywhere you like, but do ''not'' touch his ornate obi sash. The only one seemingly managing to do so with no dire consequences is his brother Juzumaru, who only gets "vocal, noisy protest".

* In ''[[https://www.fanfiction.net/s/8082443/1/Dirty_Little_Secrets Dirty Little Secrets]]'', Jack's hinted canon BerserkButton of threatening and/or insulting his friends [[TrueCompanions (who he's come to see as younger siblings)]] flares up with a [[TranquilFury silent but fiercely angry flash of steel in his eyes]] when a "police officer" looking for Miko refers to her as [[TheOldestProfession "a whore"]]. Arcee mentally expresses surprise that the adults confronting her partner aren't backing down any given the heat of Jack's glare.

* In ''[[http://www.fanfiction.net/s/4599507/1/Tales_of_a_Warrior Tales of a Warrior]]'', it's safe to say that as of chapter five you should never, ''ever'' threaten Ayuri when Keleria is around. The 'berserk' is complete with RedEyesTakeWarning and LaughingMad.

* In ''Fanfic/TheLandOfWhatMightHaveBeen'', whihle Elphaba still dislikes being used, but she controls it because she has to concede that the Mentor is right that there's nothing else they can do but help her against the Empress.

* ''Fanfic/{{Quicken}}'': Lisa is a nice, kind girl most of time, but don’t ever pry into her past, or she’ll use her power to ''[[MindRape pry into your head]]''.

** Thor. Don't threaten, endanger, or, worse, harm his son. Or indeed any children in the vicinity.
** Doctor Strange, by far the most dangerous character in the story, has two: don't condescend to him and don't suggesting that he might break his word (he has a self-imposed case of CannotTellALie). They respectively result in a savage ReasonYouSuckSpeech to a group of {{Physical God}}s and the threat of an AndIMustScream fate for the one condescending to him ([[spoiler: Zeus]]), and a more or less explicit statement that if the person questioning his word had not been a child themselves, he'd have killed them on the spot.
* ''Fanfic/ChildrenOfAnElderGod'': Asuka was not enthused about touching --let alone fighting-- Amaliel. Then the acuatic cosmic horror bit her robot's hand off. Asuka bludgeoned it, torn ''its'' limbs off and then ripped flesh chunks off its body until she was sure it was very, very dead.

* ''Fanfic/AHerosWrath'':
** While it isn't hard to piss Asura off, he won't actually try to hurt you unless you do something especially despicable. Usually this translates to familial abuse, having hunted down and nearly crippled Endeavor when he found out what he did to his wife and eldest son.
** While short-tempered, do not mock any of the Midorya Family around Izuku. He threatened to cripple the last guy who claimed his sister was guilty of something.
* Don't remind Firefly from ''Fanfic/AceCombatTheEquestrianWar'' about [[spoiler: the death of her parents]].
* ''Fanfic/AShadowOfTheTitans'': Don't come between [[AxCrazy Gadjo]] and his [[TrademarkFavoriteFood pies]]. For a good example of why, it's shown that a previous employer of his once tried to summon an EldritchAbomination; when Gadjo realized that TheEndOfTheWorldAsWeKnowIt would mean no more bakers and therefore no more pies, he proceeded to ''rip his boss' head off with his bare hands.''
* In ''Fanfic/ATriangleInTheStars'', Bill Cipher alone has [[spoiler: had]] so many that if it was an Oscar, he'd win it ten times over. And he's already pretty angry. Here's the most prominent ones:
** Do NOT, and I repeat, do ''NOT'' take his hat and/or take selfies with it if you want to see the light of another day.
** People backing out of deals, as carried over from his home series, still gets him angry. Especially when they're trapping deals.
** Betrayal, or moreso perhaps wasting time, is also a big one, [[spoiler: and Keyhole learned it the hard way.]]
** [[HatesBeingTouched Touching him]] is a minor one. He won't outright blow up, [[ManipulativeBastard for]] [[TheMasquerade reasons]], but he'll be miffed. Except for the first time, which was a hug. [[spoiler: This goes away by Chapter Twenty-Nine.]]
* ''Fanfic/ANewProblem'': T Bubbles is normally giggly, but when Horace compared her to her cousin Katrina, she screamed and slapped him.
* ''Fanfic/AnImpracticalGuideToGodhood'':
** Making cheeseburgers out of Apollo's sacred cows is not a way to make friends with him.
** Calling the Hunters of Artemis an "evil lesbian cult" makes their patron goddess and her lieutenant erupt into fury.

--> '''Emily:''' I mean, COME ON! I am a scientist, not a child! And I had thought that the fucking rangers had a handle on site security! Like, you can’t expect one person to manage site containment, scientific readings AND fucking site security!

* The Abyssal Re-Class Regina in ''Fanfic/HarryAndTheShipgirls'' is an {{Expy}} of [[WesternAnimation/MyLittlePonyFriendshipIsMagic Fluttershy]], so she normally is not easy to anger. But during [[BigBadassBattleSequence Operation UNDERTOW]], an enemy Ri-Class learned that to make Regina go absolutely postal, you should threaten her loved ones Harry and Shinano.

** In the side stories ''Wheel of Fortune'' and ''Month of Sundays'', Mei Shirakawa gets mad when someone says the words "Rental service", and Damballa does ''not'' like it when he is stated to be similar to a Zodiarts and gets '''pissed''' upon seeing Aries the most [[spoiler: because Aries Zodiarts killed off his son and daughter-in-law and his grandson was also lost in the struggle.]]

** Lexi, due to [[spoiler: spending the past few years of his life consciously buried alive thanks to Grace and Simon]], he absolutely detests most passengers (or "free-riders", as he calls them) as a result. Especially the two who did it to him.

** Zeitgeist Stardust will do anything to [[AFatherToHisMen protect his employees]]. The Grundels' attacks on his mines were at first only viewed as an annoyance, but then they started killing his men, at which point he declared war [[spoiler: and was initially even willing to commit genocide]]. Fortunately, events panned out well for everyone in the end.

* It's a bad idea to mess with [[Fanfic/ThePrivateDiaryOfElizabethQuatermain Elizabeth Quatermain]]'s TrueCompanions, because the rest of them will make sure you regret it. And it's a very bad idea to mess with Elizabeth herself, because Skinner might not let you ''live'' to regret it.

* In ''Fanfic/MallRatsTLH'', [[BrainlessBeauty Leni]] is normally a kind, if ditzy girl. However, when she sees three jocks bullying Lincoln, they go down ''[[CurbstompBattle HARD]]''.

* ''[[https://www.fanfiction.net/s/5307268/12/The-Raikage The Raikage]]'': You can insult Naruto or his father all you want, but whatever you do don't insult his mother or any of his wives because if you do, you're dead meat

[[AC:'''Manga/{{Bleach}}'']]

* TheFairFolk in ''Fanfic/SpellboundLilafly'' really don't like being called "fairies". One of the ways Adrien notices how distant Chloe (a half-fae) is becoming is that she starts responding negatively to the word. Felix temporarily becomes sensitive to it as well after his experiences at the Samhain revel.
* ''[[Fanfic/WhatGoesAroundComesAroundMiraculousLadybug What Goes Around Comes Around]]'':

* ''Fanfic/{{Spider-Ninja}}'': The Hamato siblings take the safety of their friends and family ''very'' seriously. Do ''not'' threaten any of them in front of their siblings.

* Jackson in ''[[https://archiveofourown.org/works/16315028 We Don't Need Another Hero]]''. He's a StraightGay who HasTwoMommies and is [[JerkWithAHeartOfGold something of a]] PerkyGoth with a [[SnarkKnight comment for everything]]. He'll [[InsultBackfire let most insults slide]] but should [[TheNapoleon his]] [[TinySchoolboy height]] come into play, [[BewareTheNiceOnes he won't hesitate]] to [[CurbstompBattle put someone in traction]].

* ''Fanfic/RiseOfTheGaleforces'': Whatever you do, do '''NOT''' call Adam a [[TaxonomicTermConfusion "dinosaur"]]. He's a pterosaur. PlayedForLaughs twice... [[spoiler:and very much PlayedForDrama alongside another BerserkButton - harming Violet in front of him - in Chapter 25,]] leading to an UnstoppableRage.

* ''Fanfic/RiseOfTheGaleforces'': Whatever you do, do '''NOT''' [[TaxonomicTermConfusion call]] [[PteroSoarer Adam]] [[IAmNotWeasel a]] [[ArtisticLicensePaleontology "dinosaur."]] PlayedForLaughs twice... [[spoiler:and very much PlayedForDrama alongside another BerserkButton - harming Violet in front of him - in Chapter 25,]] leading to an UnstoppableRage.