History Main / ThisIsUnforgivable

** A villainous example that is played for laughs with Boris, one of Hao's followers. The minute Horohoro points out that his teammate, Kouji Yamada (or Damayaji however you want to refer to him), looks more like a vampire than him, Boris immediately and flips out, breaks down crying and screams "Unforgivable!" at the thought of being "compared to a miserable creature" in a humiliating way, and proceeds to kill his own teammate to destroy any confusion, afterwards blaming Team Yoh for the humiliation. He later screams this again when Ryu manages to punch him in the face.

* In ''Manga/ShamanKing'', after Hao eats his brother Yoh's spirit (after which he attempts to digest it and therefore cause him to become one with him), Yoh's friends fly into a rage and make several futile attempts to attack him out of unforgiveness towards him. Even his fiance Anna says that she will never forgive him. Things settle down a lot when Manta helps them defeat his Shikigamis, though, and more so when Yoh regains his spirit to the relief of all of his friends, and Anna welcomes him back.

** Barragan

* Kagome from ''Manga/InuYasha'' has this reaction when ManipulativeBastard [[BigBad Naraku]] stages an EvilPlan designed to turn the TrueCompanions against Sango and/or corrupt her by forcing her to kill her mind-controlled little brother and/or kill them all by luring them into a castle full of poisonous miasma. She locates him by the fragments of the Shikon no Tama he has, and fires a purifying arrow at him. [[HolyHandGrenade Which blows through a building outer wall, dissipates the toxic miasma,]] ''[[HolyHandGrenade and]]'' [[HolyHandGrenade blows off his arm.]] He is so stunned he just stands there while she fires a ''second'' arrow at him, which reduces him to [[NighInvulnerability a head]]. After that he flees, and it's a long time before he dares face her again. She's actually so pissed off that the mere ''beginning'' of her "I won't forgive you"-like declaration features a whole page and follows ''for several pages''.

* In the finale of ''Anime/MobileFighterGGundam'', Domon says this to [[spoiler:Major Ulube]], who has been behind all the crap Domon had to go through.
-->'''Domon:''' [[spoiler:You piece of filth! My dad! My mom! My brother! Schwarz! My master! You've taken them all from me! And now Rain! Ulube... ]] You'll pay for this. There's no way I'll ever forgive you!
* ''Anime/MobileSuitGundamSEED'' has Kira Yamato and Athrun Zala go through this with each other, appropriately named the Cycle of Hate, when they kill each other's respective friend in battle. [[spoiler:The cycle only breaks when Athrun seemingly kills Kira himself. Kira actually survives and is nursed back to health by Lacus, Athrun's ex-fianceé. Ultimately subverted because as time passes, the complicating politics of the situation make each realize there are bigger things to worry about. They, Lacus, and Cagali actually end up uniting [[TakeAThirdOption on a third front]].]]
** [[SilkHidingSteel Lacus herself]] notably threatens this early on in a {{Foreshadowing}} moment for both her and the enigmatic ZAFT Commander Le Creuset. He internally questions her timing at pulling this out, but says "I understand", and backs down.
* ''Anime/MobileSuitGundamAGE'' follows suit when Flit returns from his battle against [[spoiler:Desil]]. As he's prepared to enter the battlefield one last time, he declares that he will never forgive the UE for [[spoiler:killing Yurin]].
** This case was an excellent example of how much impact the phrase has lost over the years. When Flit says it, the viewers didn't give it much thought... and then were very surprised to see that, after the TimeSkip, Flit ''meant'' what he'd said, and had dedicated his life to exterminating the UE, at any cost, regardless of how ruthless he had to be to do it.
--->'''Prime Minister:''' Commander Asuno! If you do this, any hope of compromise will be lost! This war will continue until one side is completely wiped out!\\
'''Flit Asuno:''' Yes, I know. That was my intention from the beginning.
** Kio also deliver this phrase to [[{{Jerkass}} Zanald]] after [[KickTheDog killing Deen]], with [[SuperMode FX Burst]].
* This phrase is used a few times in ''Anime/TransformersSuperGodMasterforce''; for example, by Minerva when the Decepticons [[KickTheDog kill a little girl's puppy]], and by Ranger when they seriously injure his horse.
* The fifth episode of ''Anime/MobileSuitGundam00'' Season 2 has the A-Laws [[spoiler:attacking the Cataron base (that contains war orphans as well as the members of Cataron itself), bombing the base, taking out all their mobile suits with ease and then letting loose little robotic shooting machines of death, the Automatons, as cleanup. When Lyle, secret member of Cataron that he is, sees the carnage, he goes GunsAkimbo on the robots and then turns on the A-Laws pilot above him, shouting "I'll never forgive you! I'll never forgive you, A-Laws!"]]
* When Chrono and Rosette discover Aion's plan in ''Manga/ChronoCrusade'' (right after [[spoiler:destroying much of New York City in the process of executing it]]), they fly into a rage and shout "Aion, we will never forgive you!"
* Subverted in the ''Manga/FruitsBasket'' manga. Kyo thinks that [[spoiler:Tohru's mother]] said this to him [[spoiler:as she was dying after her fatal accident, and that she died hating him for not saving her]]. However, a flashback near the end of the series reveals that what she was trying to say was "If you don't pay your bill, I won't forgive you," an effort to remind him of [[spoiler:the promise he made to look out for Tohru]].
** When Kagura almost lets slip to Tohru about Kyo's true form, Kyo [[HandGagging covers her mouth]] and says "If you utter another word, I'll never forgive you!". In response, Kagura yanks Kyo's arm behind him and says "Oh you won't forgive me will you?!".
* Used by TheIngenue Eve Genoard near the end of the ''LightNovel/{{Baccano}}'' light novel ''Drugs and Dominoes'', after she learns that [[spoiler:Gustavo]] [[YouKilledMyFather killed her father and brother]]. She almost shoots him, but is stopped by Luck Gandor, who [[ShootTheDog does the honors in her stead]].
* Priscilla from ''Manga/{{Claymore}}''. She goes into a CRISIS of "Unforgivable", much like a Shinji's "must not run away", before actually going Berserk. The worst is that it was completely unjustified, and that her immature, self-righteous, ignorant attitude makes her do the heart-wrenching thing that is the basis for all the Claymore plot.
** Her repetition of "Unforgivable" is more of a MadnessMantra, as it shows her ''absolute'' belief in the rules, and marks the beginning of her mental breakdown.
** Clare from the same manga also utters this, which she mixes with "[[IllKillYou I will kill you]]" [[spoiler:during her fight with Rigaldo]].
* Like Priscilla above, Fumio of ''Manga/SaitamaChainsawShoujo'' also breaks into a MadnessMantra version of this, just before [[{{Yandere}} snapping due to being dumped]] by her boyfriend. And then [[ChainsawGood we all]] [[GirlWithPsychoWeapon know what]] [[AxCrazy she does next]].
* Used to great effect in ''Manga/DeathNote'' [[spoiler:as Matsuda gives Light his much-deserved punishment]].
-->'''Matsuda:''' I'll ''kill'' him! I'LL KILL HIM! HE HAS TO DIIIIIIIIE!
** To illustrate, Light uses a form of this to his [[{{Mook}} girlfriend]] Misa at one point, when he's telling her not to screw up the task he's giving her.
* In ''Manga/AzumangaDaioh'', Tomo pulls off the "decayed" version of this on Yomi, whose "unforgivable" crime is... successfully using a vending machine after it ate Tomo's money and eating curry without spilling any. Leads to a moment when Tomo chases Yomi around trying to whack her with a cafeteria tray, and hits Yukari instead.
* ''Manga/DGrayMan'':
** Someone once managed to get [[AllLovingHero Allen]] angry enough to say this. EPIC asskicking ensued, but even so he was rather hopelessly outnumbered, and it took [[spoiler:some timely assistance from the generals]] to take out all the {{mooks}}. [[spoiler:Then things went downhill...]]
** Occurs in episode 56 from Allen to Tyki.
** When Skin Bolic goes OneWingedAngel against Yu, he begins chanting "Never forgive" [[MadnessMantra over and over]].

* Possibly one of the more ''terrifying'' examples occurs in the manga adaptation of ''VideoGame/BreathOfFireIV''. Right after seeing a village of child-summoners murdered, Ryu utters a "This Is Unforgivable" as he unleashes '''''[[UnstoppableRage THE KAISER DRAGON]]''''' (for those unfamiliar with ''Franchise/BreathOfFire'', think "nigh-unstoppable {{Kaiju}}-esque Dragon Of Mass Destruction"). It takes a CoolDownHug from Nina (whom, for the first time in her life, is scared out of her wits by a dragon)--and this is after the Kaiser Dragon has not only decimated a LEGION but ''bored a hole through a '''mountain''' via its BreathWeapon''.
* Tatewaki Kunō says this ('Yurusen!' actually) in ''Manga/RanmaOneHalf'' during his first fight with Ranma, after he insults Akane. Cue ass-kicking - Kunō's.
* ''Manga/PeachGirl'': Momo says this when a trio of girls who are in love with Kairi destroy a necklace Toji gave her because they are jealous of her for getting Kairi's attention.
* In ''Manga/SoulEater'', Death the Kid is as likely to use this in reference to anyone affecting his beloved symmetry as he is to any villain who likes to gather human souls for themselves and/or insult Shinigami-sama.
** More dramatically, [[BumblingDad Spirit]] tells this to [[AbusiveParent Medusa]] when she say she plans to abandon Crona.
* ''Manga/Reborn2004'' Tsuna says this when he is enraged by Byakuran [[spoiler:for triggering events that led to Uni's self-sacrifice, or self-imposed death]]. There is a good reason why that chapter was labled "The Last Blow."
** And again in chapter 339 to Daemon Spade.
* In chapter 51 of ''Manga/FutureDiary'' this is written on [[{{Yandere}} Yuno's]] diary. [[spoiler:"Amano was kissed by Akise. That Akise... I won't forgive him...!"]]
* In the 7th OVA of ''Manga/{{Hellsing}}'' Seras screams this repeatedly at Zorin when the latter insults the dead Pip, calling him an 'insect'. [[UnstoppableRage And then she goes]] ''[[UnstoppableRage utterly ballistic]]''.
* Any time this is uttered in ''VisualNovel/HigurashiWhenTheyCry'' (or "I'm sorry," if it's said ''sotto voce''), someone is going to get murdered. [[ColdBloodedTorture If they're lucky]].
** Higurashi Kira Episode 2 (the MagicalGirl episode) had Satoko declaring that she would not forgive [[NebulousEvilOrganization Tokyo Magika]] for hurting her Nii-nii. Later, Oyashiro Rika and Trap Satoko declared payback time before moving on to finish off Nail Ripper and send [[spoiler: [[BigBad Miyo Takano]]]] flying.
* In episode 5 of ''Anime/{{Gankutsuou}}'' Maximilien screams this during his fight with Albert.
* Ashley of ''Manga/BetrayalKnowsMyName'' yells this in episode 12 because Hotsuma ruined her clothes during their fight.
* [[CreepyChild Maria]] of ''VisualNovel/UminekoWhenTheyCry'' yells this repeatedly in episode 22 before taking revenge on her [[AbusiveParents abusive mother]].
** Earlier, Battler was angered by [[WickedWitch Beatrice]] having gleefully laughed about [[spoiler:Eva-Beatrice killing and reviving Rosa and Maria over and over again]], so much so that he decided he wouldn't accept "that bitch" as his opponent. He told Virgilia that she could call her student if she wanted to, but that didn't mean he would forgive her. A disappointed Virgilia told Beato to try being more encouraging if she was to be forgiven by him and accepted as his opponent.
* In the first season of ''Anime/MermaidMelodyPichiPichiPitch'', [[MagicIdolSinger the heroines]] say this most of (if not all) the time to their enemies (be it the Dark Lovers or the Black Beauty Sisters) for whatever it is that they did that terrorized the seas or the people, be it making a theme park only to destroy it, chase down a boy who assaulted them with a water hose and retaliate by attacking, or even planning to force-feed chocolates to girls (which would turn the Mermaid Princesses to mermaid form).
* In ''Manga/ShamanKing'', after Hao eats his brother Yoh's spirit (after which he attempts to digest it and therefore cause him to become one with him), Yoh's friends fly into a rage and make several futile attempts to attack him out of unforgiveness towards him. Even his fiance' Anna says that she will never forgive him. Things settle down a lot when Manta helps them defeat his Shikigamis, though, and more so when Yoh regains his spirit to the relief of all of his friends, and Anna welcomes him back.
-->'''Tao Len:''' ...You took my friend away and YOU'RE GOING TO PAY!!
* ''Manga/TheLegendOfZelda'':
** The manga adaptations of the ''Zelda'' series done by Akira Himekawa seem to love this trope. For example, in the ''VideoGame/TheLegendOfZeldaALinkToThePast'' manga, after Agahnim sacrifices Zelda in front of Link and sends her to the Dark World imprisoned inside a crystal, Link shouts out, "Agahnim, I'll never forgive you!" before absorbing his magic with the Master Sword, leaving Agahnim shocked in a "ThisCannotBe" manner and sending the magic right back at him.
** Also, in the ''Manga/TheLegendOfZeldaOcarinaOfTime'' manga, after Link is forced to kill his old friend, Volvagia, in order to free him from Ganondorf's control and awaken Darunia as the Sage of Fire, he calmly declares this trope to the BigBad himself.
--->'''Darunia:''' I understand how you feel. Stay here and cool your head. If your emotions erupt you will never defeat Ganondorf.\\
'''Link:''' You're right, Darunia. But I... I will never forgive Ganondorf.
* In ''Manga/FullmetalAlchemist'', Winry finds out that [[spoiler:Scar]] is responsible for the murder of her parents, [[spoiler:she immediately picks up a nearby gun and points it towards him, only stopped by Edward]]. Later on, she [[spoiler:runs into him and cooperates with him, but makes it clear that she does not forgive him for what's he done and only helping him because it is what her parents would have done]].
* Fujiwara no Mokou in the ''Franchise/TouhouProject'' manga ''Inaba of the Moon and Inaba of the Earth'' likes using this trope when it comes to her bitter rival Kaguya. Face it, she just hates her so much because of the humiliation she gave her father.
* Villain example: Rosine, the BigBad of ''Manga/{{Berserk}}'''s Lost Children arc, uses this line on Guts after he [[spoiler:destroys the tree that she has been using to make her creepy little pseudo-elves out of the children she's kidnapped]], which has the effect of ''supremely'' pissing Rosine off -- badly enough in fact, that she decides to [[spoiler:[[OneWingedAngel transform into her]] ''[[OneWingedAngel true]]'' [[OneWingedAngel Apostle form, a really creepy insect-like monster]]]].
** Another villain example from ''Berserk'': when Nosferatu Zodd's duel with Guts is interrupted, he roars this at the interlopers. This guy takes the WorthyOpponent BloodKnight dynamic ''really'' seriously.
** An actual (anti) heroic example comes from Guts in volume 17, where he says something to the same effect. After getting a WhatTheHellHero lecture handed to him, Guts rethinks how he dealt with avenging the Hawks [[spoiler:after Griffith betrayed and sacrificed them during the Eclipse]] and that since he technically played a role in the group's downfall, he didn't have a right to avenge them... however, for what Griffith did to Casca during the Eclipse [[spoiler:in which he viciously raped her in front of Guts and drove her insane as a result]], Guts said that he would ''never'' forgive Griffith.
* Even the otherwise lighthearted ''Anime/TengenToppaGurrenLagann'' has an example: post-TimeSkip, Yoko [[spoiler:picks up teaching in an elementary school as job]], hiding her real identity. When two rogue Ganmen show up and start wrecking the place, she gets angry. But when they threaten the life of one of her [[spoiler:students]] (a little girl), she utters the line as she goes ''[[BerserkButton batshit fucking mad]]'' and breaks out the hidden armory. [[BadassTeacher Asskicking ensues]].
* In Episode 13 of ''WesternAnimation/GIJoeSigma6'', after having heavily damaged his ability to assume battle mode by blowing up his Power Stone in front of him, Duke battles it out with COBRA Commander in a one-on-one duel without weapons to have him prove how tough he is. After taking a few blows from the villain, he shouts out, "I've had it with you!" before fighting back and besting him with some more punches.
-->'''Duke:''' [[AndThisIsFor That was for the team...]] ''[punches and sends COBRA Commander sliding on his feet towards the edge]'' ...and THAT was for '''YOUR PAYBACK!'''
* [[spoiler:Izaya]] from ''LightNovel/{{Durarara}}'' mumbles this during a flashback of middle school. [[spoiler:He's referring to Nakura who stabbed Shinra who is his only friend. Let's just say, Nakura was screwed the minute he stabbed Shinra by accident because of who his real target was. And 7-10 years later, Izaya extracts his revenge in the cruelest way possible.]]
** Just about everything Izaya does pisses Shizuo off to no end, but two particular incidents made the latter really want to kill the former. One: [[spoiler:Manipulating a little girl into a failed attempt at killing Shizuo, which put a [[OOCisSeriesBusiness cheerful]] [[{{Unsmile}} smile]] on his face.]] and two: [[spoiler: Izaya almost getting Vorona killed in his attempt to kill him and bragging about it. Shizuo [[TranquilFury calmly]] tells Izaya "Goodbye."]]
* In ''Anime/MyOtome'', while Arika fights Tomoe, the reveals that she was responsible for all of the [[MurderTheHypotenuse thi]][[AttemptedRape ngs]] Miya [[TakingTheHeat took the heat and got expelled for]]. Arika only responds with shock until Tomoe, while mentioning her responsibility in the acid drop that injured Arika's friend Erstin, [[spoiler:[[SpeakIllOfTheDead expresses pleasure regarding Erstin's death]] some time afterward]], prompting Arika to respond with this phrase.
* ''Manga/TokyoMewMew'' does this really well, with the Mew Mews using this against the aliens and their Chimera at random times, either before or after transforming.
** [[CatGirl Ichigo/Zoey]] even uses this trope as quite a BadassBoast towards a monster attacking Tokyo in her dream in the beginning of an early episode.
--->'''Ichigo:''' You're a wicked monster and you've terrorized this city for the last time. Now you'll pay!
* ''Manga/RosarioPlusVampire'': In chapter 41 of the second manga season Kurumu says "...won't forgive. I won't forgive you if you hurt Tsukune!"
** Several members of Tsukune's UnwantedHarem threaten this at times, even to [[spoiler:Moka]] when it looked like she might have been about to kill him.
** In chapter 50 Tsukune says this to Miyabi because he invaded Mizore's village and planted a ForcefulKiss on her.
** The only time [[spoiler:Tsukune]] speaks when he's entered his super-powerful ghoul mode is to say [[TranquilFury "Unforgivable. You even hurt my friends. I won't let you off."]]
* Although the intentions aren't carried over between meetings, this is often Hayate of ''Manga/HayateTheCombatButler'''s manner when Nagi is threatened. Gilbert is frequently the target, and clearly frightened of the consequences of his actions, though not repentant not to try again at a later date.
* PlayedForLaughs during an episode of ''Manga/{{Beelzebub}}''. After a demon world plant eats the...thing he brought to life from a demon world book, Beel goes all fiery mad, and in his baby gibberish declares "I will never forgive you for this!"...and gets swatted aside. He is just a baby after all.
* In Episode 9 of ''Anime/SonicX'': How dare you, Eggman! You destroyed Amy's lucky bracelet that she made for Sonic to protect him when he goes in the water, despite his fear of it. And she reacted with the line of "[[ThisCannotBe I don't believe it!]]" Not only did it make her cry a few seconds afterwards, but shortly after, she flew into a rage with fire burning in her pupils. You hit Amy's BerserkButton and you didn't even know it. Now she's REALLY PISSED at you, screaming at the top of her lungs, "Now you're gonna PAY!!!", which takes you by surprise. Once she charges at you and one of three of your current [[MonsterOfTheWeek Robots Of The Week]], Serpenter, shouting to you both "Don't mess with me!" along the way, and proceeds to kick its ass before going after you next, that's where you realize that you never should have made her this pissed off at you and that you're completely screwed. Cue OhCrap.
** Also, in the original edit, this is Sonic's final line at the end of the finale of Season 3, obviously declared against Eggman. It was replaced in the dub by another line in the form of "Life never stays slow around here for long! Thank goodness! Watch out, Eggman, I'm comin' at ya full speed!"
* In the ''Anime/SteelAngelKurumi'' series, Kurumi says this whenever Nakahito, or Nako gets hurt.

* ''Anime/MazingerZ'':
** Whenever Kouji Kabuto said this sentence, you knew he was REAL angry, and someone was going to be summarily trashed in the near future. A good example was in the manga, after he learnt [[BigBad Dr. Hell]] had created a weapon that was able to nullify gravity... and had tested it on an ''entire city''. Another two memorable instances happened in the ''Anime/{{Mazinkaiser}}'' movie (Mazinkaiser vs Great General of Darkness: at the beginning, after Lori and Loru's [[spoiler:HeroicSacrifice]], and at the end, right before he [[spoiler:absolutely destroys the Mykene empire army]]:
--->'''Kouji:''' Because of you... Many people have died... THAT IS UNFORGIVABLE! [[https://www.youtube.com/watch?v=qiZwGqhTP5I]]
** This sentence was also used fairly often by Baron Ashura (to Kouji and his friends after being defeated) and Dr. Hell (to Ashura after his servant botched still another operation).
** Tetsuya Tsurugi of ''Anime/GreatMazinger'' and Duke Fleed of ''Anime/UFORoboGrendizer'' also followed on the Kouji's steps.
* Yomiko of ''Anime/ReadOrDie'' says this as she breaks down and sobs in an incredibly TearJerker scene in the {{OVA}} after [[spoiler:the Nancy clone [[ImpaledWithExtremePrejudice impales the original Nancy with her arm]]]].
* As one of the oldest examples in {{Shonen}} anime (in fact, the show that kicked off the Shonen fighting genre), Kenshiro of ''Manga/FistOfTheNorthStar'' often only broke his [[TheStoic understated]] manner of speech to deliver this line, or a line to this effect, to some bad guy who went too far in [[KickTheDog Kicking The Dog]], often followed with something about how there [[LudicrousGibs wouldn't even be bones left]] [[PrepareToDie after he was done with the offending party]]. After saying it, he ''would'' kill the person he said that to. ''Even if'' DefeatMeansFriendship and the antagonist turned out to be noble all along.
* ''Manga/DeliciousInDungeon'': Although he doesn't say it aloud, [[spoiler: Shuro goes from friendly to ready to kill Laios after learning Team Touden used the dark arts to revive Falin. After he explains the potential consequences for everyone involved, it's kind of hard to blame him. Though he admitted that in the same situation, he probably would have done the same thing. It's mostly Laios' blithe attitude about it that infuriates him.]]
* ''Anime/SailorMoon'':
** Used often in Sailor Moon's InTheNameOfTheMoon speech.
** Other Senshi also use it as well, specially Rei/Mars ([[spoiler:a MonsterOfTheWeek destroys her song sheets she worked so hard to write so she could be in her SchoolFestival]]) and Ami/Mercury ([[spoiler:another MonsterOfTheWeek uses ''babies'' as hostages, not allowing Moon and the others to attack her]]) in the R season.
** A particularly effective one of these was uttered by Makoto/Jupiter, just before destroying Falion with her Supreme Thunder attack.
** A baddie also uses this; namely, Nehellenia in the penultimate story arc in the anime, when Galaxia tricks her into unleashing a nightmare by repeatedly muttering "Unforgivable" until a mirror appears from her heart. She then shatters it, unleashing a curse onto Tokyo.
* Tenchi's mother in TheMovie, ''Anime/TenchiMuyo in Love,'' utters this. Yeah, up to this point, Achika was the OrdinaryHighSchoolStudent, and Kain was a SealedEvilInACan that nothing else in the universe could defeat. [[LetsGetDangerous Doesn't matter]].
* Haruka in ''Anime/{{Noein}}'' once she really starts getting pissed at the villain. It took the entire series for her to get to this point, and she had been accepting of nearly everyone else's [[Main/{{Jerkass}} Jerkassness]].
* Goku of ''Anime/DragonBallZ'' generally delivers this line to villains who went too far with [[KickTheDog Kicking The Dog]], but tends to forget about it before the fight is even over (both Vegeta and Frieza were allowed to leave alive).
** The Frieza example was more of a case of CruelMercy on Goku's part (considering Frieza was HalfTheManHeUsedToBe at this point courtesy of his own energy disc), followed by blasting him to hell when Frieza made the mistake of trying to blast Goku InTheBack as he was trying to leave (though Frieza did get better).
** Taken to the next level in the last fight of the Cell Games arc. Cell went out of his way to make sure Gohan was well and truly pissed off, finally killing the GentleGiant Android 16, to let out Gohan's whole power. [[GoneHorriblyRight It]] [[BewareTheNiceOnes worked]].
** Also happened earlier in ''Manga/DragonBall'' when Tambourine killed Krillin. Unlike Goku's later "This Is Unforgivable" moments, Goku actually kills Tambourine purely for revenge.
*** This results in Piccolo subsequently invoking the trope.
* ''Anime/DragonBallSuper'':
** Goku Black explains his origin story. [[spoiler:He's a version of Zamasu from an alternate timeline, who used the Super Dragon Balls to swap bodies with that version of Goku. He then murdered Goku in his old body and then murdered his wife Chi Chi and son Goten.]] Upon hearing this, Goku explodes with power and rage, roars that he will never forgive him, then seriously tries to kill Black.
** Goku screams this and attacks furiously when [[spoiler:during their tournament fight, Jiren spitefully attempts to kill Goku's friends who were in the audience with an energy blast]].
* Judai of ''Anime/YuGiOhGX'' is fond of this phrase when ItsPersonal, i.e. finding out his mentor is a TreacherousAdvisor (working for the BigBad, okay, not too nice — but betraying his trust = unforgivable).
** This is also a common utterance for the heroes in the original ''Anime/YuGiOh'' (not the Toei one). Offending Yami on a moral/emotional level is not good for your health.
*** Happens so often in the original manga its practically Yami's catchphrase. What's especially hilarious is when he does it several times to the same person.
*** Becomes kind of ironic when villains who are defeated are often redeemed (more often in the anime). Yami can be surprisingly forgiving for his character type, as long as the villain ceases villainous activity. Exceptions include the Thief Bakura, who never reformed and represented the ultimate enemy.
* When Jonathan Joestar meets Dio Brando in ''Manga/JoJosBizarreAdventure'', the ''very'' first thing the latter does is literally [[KickTheDog kick Jonathan's dog Danny]]. Jonathan responds with the trope name, though he doesn't do anything to follow up on it, at least not for a while; it might have been less of a big deal in this context, seeing as he's not Japanese. Regardless, this little scene paints their relationship for the rest of their lives. It went over so well that it eventually became his default taunt in ''VideoGame/JoJosBizarreAdventureAllStarBattle''.
-->'''Jonathan:''' ''[enraged]'' What was that for?! HOW DARE YOU!
** Later, after a long string of torment from Dio, what really set Jonathan off was Dio stealing the SacredFirstKiss of Erina, Jonathan's LoveInterest. This prompts an enraged Jonathan to race home to give Dio a thrashing for this injustice.
** It is rather ironic that Jonathan is so quick to declare this at first; later on he's easily the most forgiving Joestar in the series, by a very wide margin. [[spoiler:He even forgives Dio for killing him on his honeymoon, along with ''everything else'' he did, and tells him he thinks of him as a friend as they sink to the bottom of the ocean.]]
** In Part 2: Jonathan's grandson, Joseph Joestar lays into a mafia gangster and his mook for one: mocking his TokenBlackFriend Smokey in public, and two: thoughtlessly upsetting Joseph's Granny Erina with news of the supposed death of his HonoraryUncle Speedwagon. He would later gundown a vampiric Straizo for the murder.
*** Despite having never met him, Joseph has clear respect for his deceased grandfather, which makes his hatred for Dio all the more apparent. Not only did Dio [[spoiler:[[HeroKiller kill Jonathan]] at the end of part 1, he decapitates his head, and steals the body of his rival for his own. When he told the story to his grandson Jotaro in the beginning of Part 3, it was clear as day Joseph was ''pissed''.]]
---> '''Old Joseph:''' This son of a bitch took over his body!!!
** In Part 3: Stardust Crusaders, the protagonist and Joseph's grandson, Jotaro Kujo, states that while he isn't a nice guy, he won't tolerate hurting innocent people. The then BrainwashedAndCrazy Kakyoin learns what happens when you press such a BerserkButton the hard way when Hierophant Green injures the school nurse.
*** One of the antagonists of Part 3, Steely Dan kills Enyaba, who was [[UndyingLoyalty wholeheartedly loyal]] to Dio, holds Joseph hostage with his Stand, the Lovers, and subjects Jotaro to one humiliating act after another. After finally being cornered, Dan [[VillainsWantMercy begs for mercy]], but Jotaro tells it straight to his face that he'll never forgive him, and [[ExtremeMeleeRevenge savagely beats Dan]] with Star Platinum.
*** [[spoiler:In the climactic battle of Part 3, Jotaro has Dio at his mercy after unlocking the ability to stop time. Unlike his ancestor Jonathan, Jotaro doesn't forgive Dio for all that he's done (which includes killing Kakyoin and Joseph, the latter of whom later gets better), but he won't kill him while he's down, because it would leave a bad taste in his mouth. It's only after Dio shortly recovers from his legs being broken and tries one last desperate attack that Jotaro finally finishes him off.]]
---> '''Jotaro:''' [[spoiler:There's only one reason why you lost, Dio. There's just one simple answer. You really pissed me off.]]
** Jean-Pierre Polnareff vowed to his deceased sister that he would kill "the man with two right hands", who brutally raped and murdered her. He succeeds, [[spoiler:especially after J.Geil and Hol Horse seemingly kill Avdol. Later on, he would avenge the deaths of Avdol (for real this time) and Iggy by killing Vanilla Ice]].
** This is pretty much Josuke Higashitaka's [[BerserkButton typical reaction]] to anyone who insults his trademark hairstyle. [[spoiler:When he was young, he was mysteriously struck down with an intense fever (which was actually due to Dio's influence) and his mother, Tomoko had to drive him to the hospital. Unfortunately, there was a heavy blizzard that day, and Tomoko couldn't drive through the thick snow. But then, as young Josuke's life hung in the balance, a young man with a pompadour appeared and offered to help push Tomoko's car through the snow, and mysteriously vanished after he succeeded. Josuke was forever grateful to this teenager, and styled his hair after him in respect.]] Any insult to his hair [[spoiler:is seen as an insult to the young man who saved his life]], and he will react with violence, as seen when he maims a rude upperclassman with his Stand Crazy Diamond, and he beats Rohan to within an inch of his life after he insults it in their rather one sided fight.
---> '''Josuke:''' I won't let anyone get away with making fun of my hair, no matter who it is.
** Angelo, the StarterVillain for Part 4, kills Josuke's maternal grandfather, Ryohei Higashikata, as payback for arresting him years before the events of Part 4 began. Josuke's response isn't to kill him or send him back to jail, but to fuse the bastard in stone, [[AndIMustScream trapping Angelo in a]] FateWorseThanDeath.
** Josuke and Okuyasu feel this way about [[spoiler:the murder of their friend Shigechi at the hands of [[SerialKiller Yoshikage Kira]]. They, and the rest of the Morioh Warriors, vow to avenge him and the other murder victims by bringing Kira down]].
** The Joestars are well known for not just their determination and ability to withstand pain, but also their compassion and unwillingness to forgive evil. Giorno Giovanna, [[spoiler:the son of DIO conceived through Jonathan Joestar's body]], exemplifies this in his own way. His goal is to take control of the Italian mafia gang, Passione, and reform it to be a force for good, to protect innocent people, and he won't spare anyone who harms the innocent. One example of this is when he kills Polpo by making him unwittingly eat his own gun, using Gold Experience to turn it into a banana, which ended with Polpo involuntarily shutting himself in the mouth. Prior to this, Polpo's Stand, Black Sabbath killed an old janitor, and Polpo showed no remorse or care for anyone who got killed because of his Stand's action, due to his belief that God is willing to forgive murder when someone insults you. Giorno takes this to heart when he commits the murder of Polpo.
---> '''Giorno:''' So an act of disrespect is justification for murder in your book, huh? I see now. You taught me a very important lesson... which is handy since you disrespected the life of that innocent old man. I took the liberty of changing one of your guns into your favorite snack. ''(turns to show a disgusted frown)'' [[PrepareToDie It's your last meal, Polpo. Hope you enjoy it.]]
** Bruno Bucciarati already had a sour opinion of Passione circulating drugs throughout Italy[[note]]due to what happened to his father years prior[[/note]], but once he learns first-hand that [[spoiler:the head of the organization plans to murder his own daughter (who had no idea he even existed), for his purely selfish ends, Bucciarati is instantly inspired to betray the Boss in order to protect Trish]].
---> '''Bucciarati''': Right now the Boss is... [[spoiler:The most repulsive form of evil is to exploit innocent people who don't know anything, and to use others merely for their own gain! A father did ''this'' to his innocent daughter, all to cover his own ass?! This is unforgivable! You have once again betrayed my heart!]]
* Chichiri of ''Manga/FushigiYuugi'', who rarely gets angry, furiously unloads this statement on a group of warriors who are about to disgrace an ally's sacrifice. Wisely, they back down.
** Suboshi's brother was [[spoiler:seemingly killed by the Suzaku Seven (but really, it was Tomo), and kills Tamahome's family in revenge. Tamahome's response is to go [[UnstoppableRage apeshit]] and nearly kills Suboshi in their first fight.]]
* Used in ''Manga/{{Naruto}}'' during the Retrieve Sasuke arc. Jirobo made the mistake of insulting Shikamaru, then fighting Choji, who considers him his best friend. He shouts the trope and wins the fight. Seriously, don't ever insult Choji's friends.
** Tsunade says this to the six paths of Pain after they level Konoha.
** Naruto himself is also clearly thinking this [[spoiler:during the fight with Pain. However, the Fourth happens to partially disagree because he believes what Pain said about the cycle of hatred. Naruto settles on a middle ground: he won't forgive Pain, but he won't kill him either, [[RedemptionEqualsDeath which ends up paying off]] [[LaserGuidedKarma very well]]]].
** In the "Fire Temple" Filler arc, Sora tells Kazuma he won't forgive him if he [[BerserkButton insults his father again]]. However, Kazuma's response is "You won't forgive me? So what?!"
** Naruto's fight with Gaara. Towards the end of the fight, he screams "I've HAD IT with you!" (in the anime) and head butts him. Later on, when both are too weak to even get up, he attempts to crawl ON HIS CHIN and defeat Gaara.
** Naruto says this to Haku after he "kills" Sasuke.
** Kakashi has this reaction to Kabuto [[DueToTheDead raising the dead and forcing them to fight for him]]. Specifically, Kabuto raised some of Kakashi's [[WorthyOpponent Worthy Opponents]], who had finally come to peace at the moment of their deaths. And Kabuto took away that peace by [[MoralEventHorizon yanking them back into the world of the living as undead slave soldiers]].

** Subverted in anime episode 198. During the fight between Espada #7 (Zommari Rureaux) and Captain Byakuya Kuchiki, Rureaux says it to Kuchiki after Kuchiki uses his bankai on him. Captain Kuchiki then proceeds to effortlessly deflect Rureaux's special attack and destroy him with a single blow.

* Kagome from ''Manga/InuYasha'' has this reaction when ManipulativeBastard [[BigBad Naraku]] stages an EvilPlan designed to turn the TrueCompanions against Sango and/or corrupt her by forcing her to kill her mind-controlled little brother and/or kill them all by luring them into a castle full of poisonous miasma. She locates him by the fragments of the Shikon no Tama he has, and fires a purifying arrow at him. [[HolyHandGrenade Which blows through a building outer wall, dissipates the toxic miasma,]] ''[[HolyHandGrenade and]]'' [[HolyHandGrenade blows off his arm.]] He is so stunned he just stands there while she fires a ''second'' arrow at him, which reduces him to [[NighInvulnerability a head]]. After that he flees, and it's a long time before he dares face her again. She's actually so pissed off that the mere ''beginning'' of her "I won't forgive you"-like declaration features a whole page and follows ''for several pages''.
* Negi from ''Manga/NegimaMagisterNegiMagi'' uses it the first time he confronts Fate Averruncus, this is a subversion, since Fate way out-classes Negi. Later [[OldMaster Evangeline]], however, [[IAmNotLeftHanded kicks much butt]].
** Chachamaru uses it facing down a magical wild beast.
* This is practically King Dedede's {{Catchphrase}} in ''Anime/KirbyRightBackAtYa''.
** Then there's that moment in the episode "Sweet and Sour Puss" when a monster called Togeira possesses him, taking away his ability to get angry and causing him to act kind and calm towards others even through all the beatings everyone gives him. Much later, after the King has been pounded and smacked around enough, Togeira, having been storing his anger from within him while everyone was beating on him, stores enough of his anger to unleash it all in one big mega-attack that has Dedede exploding into a massively firey rage that scares everyone and scream at the top of his lungs, "Now it's payback time!" Dedede eventually goes back to his normal self after he slips on a banana peel, therefore knocking Togeira right out of his own head.
* ''Manga/OnePiece'':
** Luffy angrily battles Zoro because he had slaughtered most of the villagers of an island (early on into the Baroque Works arc), who had given the Straw Hats plenty of food earlier on (pointed out by Luffy looking like an impossibly fat slob at the moment). Luffy was unaware that they were in fact bounty hunters. He even actually utters "Unforgivable" before the battle rages higher.
** In fact, any time Luffy angrily shouts something about TrueCompanions (at a villain, that is), it means this (as abusing one's TrueCompanions or threatening his own is the one thing that will make Luffy go mad). After this, [[CurbStompBattle asskicking ensues]].
** Robin gets like this whenever someone destroys history in front of her (ruins, artifacts, etc.). In the Skypiea arc, the poor bastard who pressed her BerserkButton ended up begging for forgiveness. Robin's response? "No." *CRACK*
** In the sixth movie, after Luffy sees [[spoiler:his entire crew get eaten by a ManEatingPlant partnered to]] the BigBad, he invokes this several times…only to be powerless against said Big Bad. It gets an echo later: after [[spoiler:said ManEatingPlant is killed, and along with it the PlantPeople that were created from the Big Bad's memories of his deceased friends and crewmates that he used in order to pretend that they were still alive.]] Realizing that the illusions were broken, the Big Bad turns on the one who killed his plant while invoking this trope, only to be stopped by Luffy, who ''kills him''. Yes, you read that right; it really was beyond any possibility of forgiveness.
** Dueling examples from Iceberg and Franky. Iceberg declares he can't forgive Franky for building the weapons that were used to frame their father figure, Tom. Franky in turn cannot forgive Iceberg for building ships for the World Government, who did the framing. Both are subversions. Iceberg states that even if he can't forgive Franky, he is still happy Frankey isn't dead and eventually gets over his anger. Franky later realizes that Iceberg making connections with the government prevented them from doing the same to him as they did with Tom.
** After learning Doflamingo's extent of crimes, [[spoiler: such as enslaving the native dwarves, turning dissenters to toys, and launching a successful FalseFlagOperation against King Riku which not only defamed him, but also doomed his grandchild Rebecca into a hated teenager, pragmatic characters like Franky and ''Robin'', who would normally give the mission the most priority, declare this in TranquilFury, working then to destroy Doflamingo's regime.]]
** Two actions that Sanji will never forgive, let alone do, is waste food or let someone go hungry; he almost starved to death once as a child, and knows it is ''not'' pleasant. One of the few times he tried punching a foe (he almost never uses his hands in a fight) was against someone who used food as weapons and armor, clearly never intending to eat it.
*** Being the ChivalrousPervert he is, he will also never forgive anyone who [[WouldHitAGirl raises their hand against an innocent woman]]. [[spoiler:So when his asshole brother Niji does everything mentioned above, you can simply imagine Sanji's utter '''''FURY'''''.]]
* This was practically the CatchPhrase of Cure White from ''Anime/FutariWaPrettyCure''. Cue asskicking of the MonsterOfTheWeek. Sometimes Cure Black said it at the same time, which is the leading cause of death among ''Franchise/PrettyCure'' villains.
** Then, in ''Anime/SuitePrettyCure'', it becomes the pre-TransformationSequence [[PreAsskickingOneLiner one-liner]] CatchPhrase for the lead duo.

* In the finale of ''Anime/MobileFighterGGundam'', Domon says this to [[spoiler:Major Ulube]], who has been behind all the crap Domon had to go through.
-->'''Domon:''' [[spoiler:You piece of filth! My dad! My mom! My brother! Schwarz! My master! You've taken them all from me! And now Rain! Ulube... ]] You'll pay for this. There's no way I'll ever forgive you!
* ''Anime/MobileSuitGundamSEED'' has Kira Yamato and Athrun Zala go through this with each other, appropriately named the Cycle of Hate, when they kill each other's respective friend in battle. [[spoiler:The cycle only breaks when Athrun seemingly kills Kira himself. Kira actually survives and is nursed back to health by Lacus, Athrun's ex-fianceé. Ultimately subverted because as time passes, the complicating politics of the situation make each realize there are bigger things to worry about. They, Lacus, and Cagali actually end up uniting [[TakeAThirdOption on a third front]].]]
** [[SilkHidingSteel Lacus herself]] notably threatens this early on in a {{Foreshadowing}} moment for both her and the enigmatic ZAFT Commander Le Creuset. He internally questions her timing at pulling this out, but says "I understand", and backs down.
* ''Anime/MobileSuitGundamAGE'' follows suit when Flit returns from his battle against [[spoiler:Desil]]. As he's prepared to enter the battlefield one last time, he declares that he will never forgive the UE for [[spoiler:killing Yurin]].
** This case was an excellent example of how much impact the phrase has lost over the years. When Flit says it, the viewers didn't give it much thought... and then were very surprised to see that, after the TimeSkip, Flit ''meant'' what he'd said, and had dedicated his life to exterminating the UE, at any cost, regardless of how ruthless he had to be to do it.
--->'''Prime Minister:''' Commander Asuno! If you do this, any hope of compromise will be lost! This war will continue until one side is completely wiped out!\\
'''Flit Asuno:''' Yes, I know. That was my intention from the beginning.
** Kio also deliver this phrase to [[{{Jerkass}} Zanald]] after [[KickTheDog killing Deen]], with [[SuperMode FX Burst]].
* This phrase is used a few times in ''Anime/TransformersSuperGodMasterforce''; for example, by Minerva when the Decepticons [[KickTheDog kill a little girl's puppy]], and by Ranger when they seriously injure his horse.
* The fifth episode of ''Anime/MobileSuitGundam00'' Season 2 has the A-Laws [[spoiler:attacking the Cataron base (that contains war orphans as well as the members of Cataron itself), bombing the base, taking out all their mobile suits with ease and then letting loose little robotic shooting machines of death, the Automatons, as cleanup. When Lyle, secret member of Cataron that he is, sees the carnage, he goes GunsAkimbo on the robots and then turns on the A-Laws pilot above him, shouting "I'll never forgive you! I'll never forgive you, A-Laws!"]]
* When Chrono and Rosette discover Aion's plan in ''Manga/ChronoCrusade'' (right after [[spoiler:destroying much of New York City in the process of executing it]]), they fly into a rage and shout "Aion, we will never forgive you!"
* Subverted in the ''Manga/FruitsBasket'' manga. Kyo thinks that [[spoiler:Tohru's mother]] said this to him [[spoiler:as she was dying after her fatal accident, and that she died hating him for not saving her]]. However, a flashback near the end of the series reveals that what she was trying to say was "If you don't pay your bill, I won't forgive you," an effort to remind him of [[spoiler:the promise he made to look out for Tohru]].
** When Kagura almost lets slip to Tohru about Kyo's true form, Kyo [[HandGagging covers her mouth]] and says "If you utter another word, I'll never forgive you!". In response, Kagura yanks Kyo's arm behind him and says "Oh you won't forgive me will you?!".
* Used by TheIngenue Eve Genoard near the end of the ''LightNovel/{{Baccano}}'' light novel ''Drugs and Dominoes'', after she learns that [[spoiler:Gustavo]] [[YouKilledMyFather killed her father and brother]]. She almost shoots him, but is stopped by Luck Gandor, who [[ShootTheDog does the honors in her stead]].
* Priscilla from ''Manga/{{Claymore}}''. She goes into a CRISIS of "Unforgivable", much like a Shinji's "must not run away", before actually going Berserk. The worst is that it was completely unjustified, and that her immature, self-righteous, ignorant attitude makes her do the heart-wrenching thing that is the basis for all the Claymore plot.
** Her repetition of "Unforgivable" is more of a MadnessMantra, as it shows her ''absolute'' belief in the rules, and marks the beginning of her mental breakdown.
** Clare from the same manga also utters this, which she mixes with "[[IllKillYou I will kill you]]" [[spoiler:during her fight with Rigaldo]].
* Like Priscilla above, Fumio of ''Manga/SaitamaChainsawShoujo'' also breaks into a MadnessMantra version of this, just before [[{{Yandere}} snapping due to being dumped]] by her boyfriend. And then [[ChainsawGood we all]] [[GirlWithPsychoWeapon know what]] [[AxCrazy she does next]].
* Used to great effect in ''Manga/DeathNote'' [[spoiler:as Matsuda gives Light his much-deserved punishment]].
-->'''Matsuda:''' I'll ''kill'' him! I'LL KILL HIM! HE HAS TO DIIIIIIIIE!
** To illustrate, Light uses a form of this to his [[{{Mook}} girlfriend]] Misa at one point, when he's telling her not to screw up the task he's giving her.
* In ''Manga/AzumangaDaioh'', Tomo pulls off the "decayed" version of this on Yomi, whose "unforgivable" crime is... successfully using a vending machine after it ate Tomo's money and eating curry without spilling any. Leads to a moment when Tomo chases Yomi around trying to whack her with a cafeteria tray, and hits Yukari instead.
* ''Manga/DGrayMan'':
** Someone once managed to get [[AllLovingHero Allen]] angry enough to say this. EPIC asskicking ensued, but even so he was rather hopelessly outnumbered, and it took [[spoiler:some timely assistance from the generals]] to take out all the {{mooks}}. [[spoiler:Then things went downhill...]]
** Occurs in episode 56 from Allen to Tyki.
** When Skin Bolic goes OneWingedAngel against Yu, he begins chanting "Never forgive" [[MadnessMantra over and over]].
* In ''Manga/YuYuHakusho'' seasonal BigBad Sensui forces the heroes to play a video game made real by a [[PsychicPowers pyschic child]], who is playing as the game's BigBad. As long as the heroes keep playing they can't die but if they win the game the kid dies, something Sensui conveniently forgot to tell his child follower. The team is reluctant to does this; but in the end one of them, [[NobleDemon Kurama]], does the deed. Afterwards, Kurama doesn't utter this line but you can ''definitely tell'' he's thinking it; both by the expression on his face and his actions later on.
** Yusuke also declares this to Toguro once he [[spoiler:kills Genkai]]. But it's made very convincing by the [[TranquilFury cold, bitter delivery]].
* Possibly one of the more ''terrifying'' examples occurs in the manga adaptation of ''VideoGame/BreathOfFireIV''. Right after seeing a village of child-summoners murdered, Ryu utters a "This Is Unforgivable" as he unleashes '''''[[UnstoppableRage THE KAISER DRAGON]]''''' (for those unfamiliar with ''Franchise/BreathOfFire'', think "nigh-unstoppable {{Kaiju}}-esque Dragon Of Mass Destruction"). It takes a CoolDownHug from Nina (whom, for the first time in her life, is scared out of her wits by a dragon)--and this is after the Kaiser Dragon has not only decimated a LEGION but ''bored a hole through a '''mountain''' via its BreathWeapon''.
* Tatewaki Kunō says this ('Yurusen!' actually) in ''Manga/RanmaOneHalf'' during his first fight with Ranma, after he insults Akane. Cue ass-kicking - Kunō's.
* ''Manga/PeachGirl'': Momo says this when a trio of girls who are in love with Kairi destroy a necklace Toji gave her because they are jealous of her for getting Kairi's attention.
* In ''Manga/SoulEater'', Death the Kid is as likely to use this in reference to anyone affecting his beloved symmetry as he is to any villain who likes to gather human souls for themselves and/or insult Shinigami-sama.
** More dramatically, [[BumblingDad Spirit]] tells this to [[AbusiveParent Medusa]] when she say she plans to abandon Crona.
* ''Manga/Reborn2004'' Tsuna says this when he is enraged by Byakuran [[spoiler:for triggering events that led to Uni's self-sacrifice, or self-imposed death]]. There is a good reason why that chapter was labled "The Last Blow."
** And again in chapter 339 to Daemon Spade.
* In chapter 51 of ''Manga/FutureDiary'' this is written on [[{{Yandere}} Yuno's]] diary. [[spoiler:"Amano was kissed by Akise. That Akise... I won't forgive him...!"]]
* In the 7th OVA of ''Manga/{{Hellsing}}'' Seras screams this repeatedly at Zorin when the latter insults the dead Pip, calling him an 'insect'. [[UnstoppableRage And then she goes]] ''[[UnstoppableRage utterly ballistic]]''.
* Any time this is uttered in ''VisualNovel/HigurashiWhenTheyCry'' (or "I'm sorry," if it's said ''sotto voce''), someone is going to get murdered. [[ColdBloodedTorture If they're lucky]].
** Higurashi Kira Episode 2 (the MagicalGirl episode) had Satoko declaring that she would not forgive [[NebulousEvilOrganization Tokyo Magika]] for hurting her Nii-nii. Later, Oyashiro Rika and Trap Satoko declared payback time before moving on to finish off Nail Ripper and send [[spoiler: [[BigBad Miyo Takano]]]] flying.
* In episode 5 of ''Anime/{{Gankutsuou}}'' Maximilien screams this during his fight with Albert.
* Ashley of ''Manga/BetrayalKnowsMyName'' yells this in episode 12 because Hotsuma ruined her clothes during their fight.
* [[CreepyChild Maria]] of ''VisualNovel/UminekoWhenTheyCry'' yells this repeatedly in episode 22 before taking revenge on her [[AbusiveParents abusive mother]].
** Earlier, Battler was angered by [[WickedWitch Beatrice]] having gleefully laughed about [[spoiler:Eva-Beatrice killing and reviving Rosa and Maria over and over again]], so much so that he decided he wouldn't accept "that bitch" as his opponent. He told Virgilia that she could call her student if she wanted to, but that didn't mean he would forgive her. A disappointed Virgilia told Beato to try being more encouraging if she was to be forgiven by him and accepted as his opponent.
* In the first season of ''Anime/MermaidMelodyPichiPichiPitch'', [[MagicIdolSinger the heroines]] say this most of (if not all) the time to their enemies (be it the Dark Lovers or the Black Beauty Sisters) for whatever it is that they did that terrorized the seas or the people, be it making a theme park only to destroy it, chase down a boy who assaulted them with a water hose and retaliate by attacking, or even planning to force-feed chocolates to girls (which would turn the Mermaid Princesses to mermaid form).
* In ''Manga/ShamanKing'', after Hao eats his brother Yoh's spirit (after which he attempts to digest it and therefore cause him to become one with him), Yoh's friends fly into a rage and make several futile attempts to attack him out of unforgiveness towards him. Even his fiance' Anna says that she will never forgive him. Things settle down a lot when Manta helps them defeat his Shikigamis, though, and more so when Yoh regains his spirit to the relief of all of his friends, and Anna welcomes him back.
-->'''Tao Len:''' ...You took my friend away and YOU'RE GOING TO PAY!!
* ''Manga/TheLegendOfZelda'':
** The manga adaptations of the ''Zelda'' series done by Akira Himekawa seem to love this trope. For example, in the ''VideoGame/TheLegendOfZeldaALinkToThePast'' manga, after Agahnim sacrifices Zelda in front of Link and sends her to the Dark World imprisoned inside a crystal, Link shouts out, "Agahnim, I'll never forgive you!" before absorbing his magic with the Master Sword, leaving Agahnim shocked in a "ThisCannotBe" manner and sending the magic right back at him.
** Also, in the ''Manga/TheLegendOfZeldaOcarinaOfTime'' manga, after Link is forced to kill his old friend, Volvagia, in order to free him from Ganondorf's control and awaken Darunia as the Sage of Fire, he calmly declares this trope to the BigBad himself.
--->'''Darunia:''' I understand how you feel. Stay here and cool your head. If your emotions erupt you will never defeat Ganondorf.\\
'''Link:''' You're right, Darunia. But I... I will never forgive Ganondorf.
* In ''Manga/FullmetalAlchemist'', Winry finds out that [[spoiler:Scar]] is responsible for the murder of her parents, [[spoiler:she immediately picks up a nearby gun and points it towards him, only stopped by Edward]]. Later on, she [[spoiler:runs into him and cooperates with him, but makes it clear that she does not forgive him for what's he done and only helping him because it is what her parents would have done]].
* Fujiwara no Mokou in the ''Franchise/TouhouProject'' manga ''Inaba of the Moon and Inaba of the Earth'' likes using this trope when it comes to her bitter rival Kaguya. Face it, she just hates her so much because of the humiliation she gave her father.
* Villain example: Rosine, the BigBad of ''Manga/{{Berserk}}'''s Lost Children arc, uses this line on Guts after he [[spoiler:destroys the tree that she has been using to make her creepy little pseudo-elves out of the children she's kidnapped]], which has the effect of ''supremely'' pissing Rosine off -- badly enough in fact, that she decides to [[spoiler:[[OneWingedAngel transform into her]] ''[[OneWingedAngel true]]'' [[OneWingedAngel Apostle form, a really creepy insect-like monster]]]].
** Another villain example from ''Berserk'': when Nosferatu Zodd's duel with Guts is interrupted, he roars this at the interlopers. This guy takes the WorthyOpponent BloodKnight dynamic ''really'' seriously.
** An actual (anti) heroic example comes from Guts in volume 17, where he says something to the same effect. After getting a WhatTheHellHero lecture handed to him, Guts rethinks how he dealt with avenging the Hawks [[spoiler:after Griffith betrayed and sacrificed them during the Eclipse]] and that since he technically played a role in the group's downfall, he didn't have a right to avenge them... however, for what Griffith did to Casca during the Eclipse [[spoiler:in which he viciously raped her in front of Guts and drove her insane as a result]], Guts said that he would ''never'' forgive Griffith.
* Even the otherwise lighthearted ''Anime/TengenToppaGurrenLagann'' has an example: post-TimeSkip, Yoko [[spoiler:picks up teaching in an elementary school as job]], hiding her real identity. When two rogue Ganmen show up and start wrecking the place, she gets angry. But when they threaten the life of one of her [[spoiler:students]] (a little girl), she utters the line as she goes ''[[BerserkButton batshit fucking mad]]'' and breaks out the hidden armory. [[BadassTeacher Asskicking ensues]].
* In Episode 13 of ''WesternAnimation/GIJoeSigma6'', after having heavily damaged his ability to assume battle mode by blowing up his Power Stone in front of him, Duke battles it out with COBRA Commander in a one-on-one duel without weapons to have him prove how tough he is. After taking a few blows from the villain, he shouts out, "I've had it with you!" before fighting back and besting him with some more punches.
-->'''Duke:''' [[AndThisIsFor That was for the team...]] ''[punches and sends COBRA Commander sliding on his feet towards the edge]'' ...and THAT was for '''YOUR PAYBACK!'''
* [[spoiler:Izaya]] from ''LightNovel/{{Durarara}}'' mumbles this during a flashback of middle school. [[spoiler:He's referring to Nakura who stabbed Shinra who is his only friend. Let's just say, Nakura was screwed the minute he stabbed Shinra by accident because of who his real target was. And 7-10 years later, Izaya extracts his revenge in the cruelest way possible.]]
** Just about everything Izaya does pisses Shizuo off to no end, but two particular incidents made the latter really want to kill the former. One: [[spoiler:Manipulating a little girl into a failed attempt at killing Shizuo, which put a [[OOCisSeriesBusiness cheerful]] [[{{Unsmile}} smile]] on his face.]] and two: [[spoiler: Izaya almost getting Vorona killed in his attempt to kill him and bragging about it. Shizuo [[TranquilFury calmly]] tells Izaya "Goodbye."]]
* In ''Anime/MyOtome'', while Arika fights Tomoe, the reveals that she was responsible for all of the [[MurderTheHypotenuse thi]][[AttemptedRape ngs]] Miya [[TakingTheHeat took the heat and got expelled for]]. Arika only responds with shock until Tomoe, while mentioning her responsibility in the acid drop that injured Arika's friend Erstin, [[spoiler:[[SpeakIllOfTheDead expresses pleasure regarding Erstin's death]] some time afterward]], prompting Arika to respond with this phrase.
* ''Manga/TokyoMewMew'' does this really well, with the Mew Mews using this against the aliens and their Chimera at random times, either before or after transforming.
** [[CatGirl Ichigo/Zoey]] even uses this trope as quite a BadassBoast towards a monster attacking Tokyo in her dream in the beginning of an early episode.
--->'''Ichigo:''' You're a wicked monster and you've terrorized this city for the last time. Now you'll pay!
* ''Manga/RosarioPlusVampire'': In chapter 41 of the second manga season Kurumu says "...won't forgive. I won't forgive you if you hurt Tsukune!"
** Several members of Tsukune's UnwantedHarem threaten this at times, even to [[spoiler:Moka]] when it looked like she might have been about to kill him.
** In chapter 50 Tsukune says this to Miyabi because he invaded Mizore's village and planted a ForcefulKiss on her.
** The only time [[spoiler:Tsukune]] speaks when he's entered his super-powerful ghoul mode is to say [[TranquilFury "Unforgivable. You even hurt my friends. I won't let you off."]]
* Although the intentions aren't carried over between meetings, this is often Hayate of ''Manga/HayateTheCombatButler'''s manner when Nagi is threatened. Gilbert is frequently the target, and clearly frightened of the consequences of his actions, though not repentant not to try again at a later date.
* PlayedForLaughs during an episode of ''Manga/{{Beelzebub}}''. After a demon world plant eats the...thing he brought to life from a demon world book, Beel goes all fiery mad, and in his baby gibberish declares "I will never forgive you for this!"...and gets swatted aside. He is just a baby after all.
* In Episode 9 of ''Anime/SonicX'': How dare you, Eggman! You destroyed Amy's lucky bracelet that she made for Sonic to protect him when he goes in the water, despite his fear of it. And she reacted with the line of "[[ThisCannotBe I don't believe it!]]" Not only did it make her cry a few seconds afterwards, but shortly after, she flew into a rage with fire burning in her pupils. You hit Amy's BerserkButton and you didn't even know it. Now she's REALLY PISSED at you, screaming at the top of her lungs, "Now you're gonna PAY!!!", which takes you by surprise. Once she charges at you and one of three of your current [[MonsterOfTheWeek Robots Of The Week]], Serpenter, shouting to you both "Don't mess with me!" along the way, and proceeds to kick its ass before going after you next, that's where you realize that you never should have made her this pissed off at you and that you're completely screwed. Cue OhCrap.
** Also, in the original edit, this is Sonic's final line at the end of the finale of Season 3, obviously declared against Eggman. It was replaced in the dub by another line in the form of "Life never stays slow around here for long! Thank goodness! Watch out, Eggman, I'm comin' at ya full speed!"
* In the ''Anime/SteelAngelKurumi'' series, Kurumi says this whenever Nakahito, or Nako gets hurt.
* ''Manga/HanaukyoMaidTeam La Verite'' episode 9. After Lemon, Marron, and Melon speak rudely to Captain Konoe Tsurugi, Konoe's lieutenant Yashima Sanae tells them "Speaking so rudely to captain...unforgivable!" She then chases them away.
* A rather odd example occurs in ''LightNovel/ACertainMagicalIndex'' when Touma says this to the villain of the Daihasei Festival arc, Oriana Thompson, who is involved in a plot to brainwash the city. It's not the possibility of mass mind control that really upsets him, though, it's that her actions are interfering with the festival that's going on. Yeah, Touma can be a bit [[SkewedPriorities strange.]]
* In ''Manga/SukebanDeka'', "Saki's" catchphrase is "Omaera, Yurusansezore!" (You Won't Be Forgiven!)

* In an episode of ''Manga/OuranHighSchoolHostClub'' Tamaki says "Unforgivable!" when eavesdropping on a moment between Haruhi and Hikaru.
* ''Anime/CowboyBebop'' episode 22 "Cowboy Funk". During their confrontation on top of the ruined building Spike says "I will never forgive you" to Cowboy Andy, who's been interfering with his efforts to capture Teddy Bomber throughout the episode.
* In ''Anime/PeterPanNoBouken'' Hook says this to a ''giant sea creature'' (no, not the crocodile), which might make uninitiated anime fans watching the subbed version wonder why a giant sea creature cares whether Hook forgives it or not.
* ''Manga/BlackCat'': In the anime Train says this after Creed kills Saya.

* A lot of this flies back and forth when most of the cast of ''Manga/BokuraNoKiseki'' regains their PastLifeMemories. To be specific, they are all the reincarnations of people in two groups: the original inhabitants of a castle in Zerestria that was invaded and destroyed by a country that was ''supposed'' to be its ally, and guests living in the castle who were from said invading country, Moswick. In particular, Meguro, the reincarnation of a squire of Zerestria, freaks out and tries to kill Nishina, who was a knight of Moswick. [[spoiler:Teshimano and Harusumi talk him out of it.]]
* Tamaki from ''Anime/CodeGeass'', despite being TheFool of the team, definitely gives vibes of this when [[spoiler:he assumes the Britannians planned to lure the Black Knights and all the Japanese into a kill zone disguised as the Special Zone.]]

* ''Anime/CuteHighEarthDefenseClubLove'': The super-pretentious Chevalier Aurite hands out not one, but ''two'' ''yurusenais'' to the Battle Lovers, when the two opposed teams of [[MagicalGirl Magical Boys]] confront each other. It's ''combined'' with a [[GivingSomeoneThePointerFinger Pointer Finger]]. [[AntiClimax Then the bad guys just walk off]]. This is [[LampshadeHanging lampshaded]]:
-->'''Battle Lover Epinard:''' They introduced themselves then left...\\
'''Battle Lover Cerulean:''' Lucky for us. You can't talk to guys like that anyway.
* Towards the end of ''Anime/{{Pokemon}}: Black and White'' Season 1, after [[spoiler:Meowth betrays Ash and the group, Pikachu becomes extremely furious with Meowth for even doing it, and decided that the final straw. He freed the group's Pokemon to assist in the escape, and when Team Rocket retreats, Pikachu has to be held back by Ash.]]

* ''Manga/ACruelGodReigns'': This is Ian's opinion of Natasha staying silent about his father abusing Jeremy.

* An unpublished story of ''WesternAnimation/ThePowerpuffGirls'', "Mojo's Day Off," had Mojo Jojo trying to relax but he is persistently interrupted by the girls who think he's responsible for some random evil in the city. In one segment, he's in an easy chair reading a murder mystery novel and comes to the part where the murderer is revealed when the girls crash through. Blossom, having read the novel herself, proceeds to spoil the denoument.
-->'''Mojo:''' OOOH! You gave away the ending! That is unforgivable!!

* In ''ComicStrip/{{Peanuts}}'', Snoopy will never forgive "Poochie", a girl he knew when he was a puppy, saying you don't forgive someone who does what she did. [[spoiler: She threw a stick, then went off with another dog while he was fetching it.]]

* ''Manga/Evangelion303'': Minor example. In chapter 3, after being [[OldSchoolDogFight beaten]] by [[LoveInterest Shinji]] and messing up a mission, [[FieryRedhead Asuka]] is extremely distraught and paranoid -due to several weeks of disappointments and frustrations- and she is starting to wonder if Shinji is actually trying to sabotage her. Then she angrily thinks: "This is unforgivable."
* In ''[[Fanfic/DeliverUsFromEvilSeries Mortality]]'': "If your masters actions destroy him whom I regard as the best and wisest man I have ever known, make no mistake that I shall hunt down, to a man, everyone who played a part in his destruction."
* ''Fanfic/RosarioVampireBrightestDarkness'':
** In Act III chapter 44, this is Kokoa's word-for-word reaction upon the revelation that Akua and Kahlua are working for Fairy Tale and have been all along.
** During the climax of Act IV, the entire gang has this reaction when they discover that Hokuto, [[CoDragons Jovian, and Jacqueline]] had taken Tsukune's family hostage. They also have this reaction doubly so when they discover that Jovian had spent the entire time sexually abusing Kyouko ForTheEvulz, with the others flat-out telling Jovian during chapter 26 that she's going to Hell for what she did to Kyouko.
** In Act IV chapter 31, right before laying the smackdown on Hokuto, Tsukune, usually an AllLoving Hero and the personification of TurnTheOtherCheek, flat-out tells him to his face that Hokuto will ''never'' be forgiven for everything he's done. Considering the fact that Hokuto's list of KickTheDog moments include such gems as kidnapping and brainwashing Felucia, setting Kuyou loose on Yokai Academy, letting Jovian and Jacqueline rape and [[ColdBloodedTorture torture]] Felucia to the point of SanitySlippage, holding Tsukune's mother and cousin hostage, and being indirectly responsible for the deaths of Felucia, Kenzo's gang, and the original Ezrana sisters, it's ''perfectly'' justified.
* In ''Fanfic/MagicalPonyLyricalTwilight'', Applejack, Rarity and Rainbow Dash are beyond furious when Twilight tells the rest of the Mane Six the abuse Fate Testarossa suffered at the hands of her mother, Presea. Twilight has to calm them down as their anger is scaring Fluttershy.
* In the ''Fanfic/PonyPOVSeries'', an Equestrian saying this and meaning this is [[BewareTheNiceOnes incredibly serious business for them]] because of the emphasis on forgiveness and kindness in their culture. Basically, when a pony says this seriously? They ''mean it''.
* To the Straw Hat Pirates - Luffy most of all - dreams are SeriousBusiness. So when they are confronted to the Nightmares in ''[[https://www.fanfiction.net/s/7387687/18/Asteria-Nightmare Asteria Nightmare]]'' - a EldritchAbomination race feeding on dreams while leaving their prey a soulless husk - they immediately go on the warpath. An irate Luffy even declares he will ''kill'' the Nightmare Queen for daring to think it could steal his crewmates' ambitions, ''and he does''.

* In ''Fanfic/NeitherABirdNorAPlaneItsDeku'', All Might declares this after the [[spoiler:Ultra-Humanite seemingly executes Izuku by blasting him off Mt. Fuji.]]
-->'''All Might:''' I won't forgive you for this! Take away seventy-five percent of my power, eighty-five percent, one hundred percent, even! You won't ever escape from here!
* ''Fanfic/MegamiNoHanabira:'' [[NiceGirl Sweet, gentle little Nanami]] is [[BerserkerTears on the verge of tears]] when she lets this loose on the BigBad, a man she looked up to before finding out [[BitchInSheepsClothing how absolutely depraved he is.]] This gets the BigBad boiling mad, considering he believes himself to [[AGodAmI be a god]] and thus finds the idea of a human withholding forgiveness downright insulting.
-->'''Nanami:''' No forgiveness. Not ever. I will never, ''ever'' forgive you! EVER!
* ''Fanfic/NeonGenesisEvangelionGenocide'': After Ritsuko confesses what her and Gendo has been doing with the Emerald Tablet, especially using Asuka as a guinea pig for the project, despite fully knowing how extremely dangerous it was, as well as causing the incident in Beijing with Unit-A which caused half-a-million casualties, Misato straight up tells her that she deserves to die.
* Subverted in ''Fanfic/TheUnfantasticAdventuresOfBizarroNo1''. SelfDemonstrating/{{Bizarro}} and his race might forgive the [[ManOfKryptonite Blue-Kryptonite Men]] for attempting to wipe them out. The Blue-K Men's attempt to sculpt their cubic-shaped Bizarro World into a round planet is an unforgivable insult, though.

* ''[[https://archiveofourown.org/works/22119871 Lord Help the Mister]]'': Just as in canon, Dinah Lance let Sara go to the ''Gambit'' to sleep with her sister's boyfriend. ''Unlike'' the show, Laurel stays to watch the ship leave so Sara never gets on; and eventually the whole truth comes out. Laurel eventually forgives Sara, ''might'' one day forgive Oliver, but cannot forgive her mother. Largely because out of everyone, she simply cannot understand her mother's motivations, and doesn't like the [[ParentalFavoritism one she thinks of.]]

* ''WesternAnimation/MulanII'', Mushu, pressured by Cri-Kee, admits to Mulan what he had done. Mulan is enlightened by Mushu's admittance, but also gets mad at him. She even says that what he did was unforgivable, and when he tries to ask to help some more, she replies with "You've helped enough."

* ''Manga/RosarioToVampire'': In chapter 41 of the second manga season Kurumu says "...won't forgive. I won't forgive you if you hurt Tsukune!"

---> '''Giorno:''' When someone insults you, even murder is forgivable? I see. What you told me was very important. You insulted that innocent old man's life. So I changed one of your guns into a banana. (Turns with a disgusted frown) You should savor your last meal as best you can.

** The ProfessionalKiller, Shelly de Killer. Above all else, de Killer places immense value on the trust between himself and his clients, so when Phoenix tells him that his client, [[spoiler: Matt Engarde,]] set up a hidden camera at the scene of De Killer's contract kill as blackmail in case things went south, he [[spoiler: immediately breaks his contract with Engarde, returns Maya to Phoenix, and swears that he will tirelessly hunt Engarde to the ends of the earth to exact his revenge. It [[BreakTheHaughty scares the everloving shit out of Engarde so hard]] that he ''begs'' to be sentenced guilty, on the off chance that might have an ounce more protection from de Killer if he's behind prison walls.]] The moral of the story: Don't piss off an assassin.

** The ProfessionalKiller, Shelly de Killer. Above all else, de Killer places immense value on the trust between himself and his clients, so when Phoenix tells him that his client, [[spoiler: Matt Engarde,]] set up a hidden camera at the scene of De Killer's contract kill as blackmail in case things went south, he [[spoiler: immediately breaks his contract with Engarde, returns Maya to Phoenix, and swears that he will tirelessly hunt Engarde to the ends of the earth to enact his revenge. It [[BreakTheHaughty scares the everloving shit out of Engarde so hard]] that he ''begs'' to be sentenced guilty, on the off chance that might have an ounce more protection from de Killer if he's behind prison walls.]] The moral of the story: Don't piss off an assassin.

** Used for humor in the first case of ''VisualNovel/AceAttorneyInvestigations''. A body is found in Edgeworth's office, what gets him really mad? Someone broke his prized tea set!

** The ProfessionalKiller, Shelly de Killer. Above all else, de Killer places immense value on the trust between himself and his clients, so when Phoenix tells him that his client, [[spoiler: Matt Engarde,]] set up a hidden camera at the scene of De Killer's contract kill as blackmail in case things went south, he [[spoiler: immediately breaks his contract with Engarde, returns Maya to Phoenix, and swears that he will tirelessly hunt Engarde to the ends of the earth to enact his revenge.]] The moral of the story: Don't piss off an assassin.

--->'''Edgeworth:''' Some time in the near future, one very betrayed assassin may appear before you. Needless to say, that man is very good at what he does.

* In the ''Franchise/AceAttorney'' series, there are two things Phoenix Wright considers completely "inexcusable", as he says in case 3-3: Poisoning, and betrayal. There's a deep, personal reason for this.

** Shelly de Killer. After finding out that his client taped the crime scene for blackmail, he [[spoiler:breaks his contract with Engarde, returns Maya to Phoenix and swears that Engarde will get his just desserts.]] The moral of the story: Don't piss off an assassin.
--->'''Edgeworth:''' Some time in the near future, one very betrayed assassin may appear before you. Needless to say, that man is very good at what he does. I'm sure you know what I mean, if you watch this video.

* In ''Anime/MaiOtome'', while Arika fights Tomoe, the reveals that she was responsible for all of the [[MurderTheHypotenuse thi]][[AttemptedRape ngs]] Miya [[TakingTheHeat took the heat and got expelled for]]. Arika only responds with shock until Tomoe, while mentioning her responsibility in the acid drop that injured Arika's friend Erstin, [[spoiler:[[SpeakIllOfTheDead expresses pleasure regarding Erstin's death]] some time afterward]], prompting Arika to respond with this phrase.

* Western animation equivalent: WesternAnimation/BugsBunny's declaration, "Of course you realize, ThisMeansWar!" heard (as per Chuck Jones) when the happy-go-lucky wabbit is finally pushed to the wall. Cue asskicking, etc. [[Creator/MarxBrothers Groucho Marx]] [[OlderThanTheyThink said it first]].

* In ''Anime/CuteHighEarthDefenseClubLove'', the super-pretentious Chevalier Aurite hands out not one, but ''two'' ''yurusenais'' to the Battle Lovers, when the two opposed teams of [[MagicalGirl Magical Boys]] confront each other. It's ''combined'' with a [[GivingSomeoneThePointerFinger Pointer Finger]]. [[AntiClimax Then the bad guys just walk off]]. This is [[LampshadeHanging lampshaded]]:

-->--'''Goku''' to '''Jiren''' after the latter tries killing everyone in the Universe 7 stands, ''Anime/DragonBallSuper''

--> '''Scar:''' Ahh, my friends...
--> '''Shenzi:''' ''Friends?'' I thought he said we were the enemy!
--> '''Banzai:''' Yeah, that's what I heard.
--> '''Scar (OhCrap):''' ...
--> '''Shenzi and Banzai:''' ''Ed?''
--> '''Ed:''' [[LaughingMad Hehe! Hehe! Hehehe!]]

--->[[spoiler: '''Sans''':]] "it's a beautiful day outside. birds are singing, flowers are blooming... on days like these, kids [[KidsAreCruel like you]]... [[spoiler: '''[[LetsGetDangerous Should be burning in hell.]]''']]"

%% Image removed per Image Pickin' thread: https://tvtropes.org/pmwiki/posts.php?discussion=1556970141000363400
%% Please start a new thread if you'd like to suggest an image.

* Haruka in ''{{Anime/Noein}}'' once she really starts getting pissed at the villain. It took the entire series for her to get to this point, and she had been accepting of nearly everyone else's [[Main/{{Jerkass}} Jerkassness]].

* Kagome from ''Manga/InuYasha'' has this reaction when ManipulativeBastard [[BigBad Naraku]] stages an EvilPlan designed to turn the TrueCompanions against Sango and/or corrupt her by forcing her to kill her mind-controlled little brother and/or kill them all by luring them into a castle full of poisonous miasma. She locates him by the fragments of the Shikon no Tama he has, and fires a purifying arrow at him. [[HolyHandGrenade Which blows through a building outer wall, dissipates the toxic miasma,]] ''[[HolyHandGrenade and]]'' [[HolyHandGrenade blows off his arm.]] He is so stunned he just stands there while she fires a ''second'' arrow at him, which reduces him to [[NighInvulnerability a head]]. After that he flees, and it's a long time before he dares face her again. She's actually so pissed off that the mere ''beginning'' of her "I won't forgive you"-like declaration features [[http://www.mangareader.net/226-16366-17/inuyasha/chapter-110.html a whole page]] and follows ''for several pages''.
* Negi from ''Manga/MahouSenseiNegima'' uses it the [[http://www.mangafox.com/page/manga/read/71/mahou_sensei_negima/chapter.11094/page.11/ first time he confronts Fate Averruncus]], this is a subversion, since Fate way out-classes Negi. Later [[OldMaster Evangeline]], however, [[IAmNotLeftHanded kicks much butt]].
** [[http://www.batoto.net/read/_/2246/mahou-sensei-negima_v21_ch190_by_aquastar/14 Chachamaru]] uses it facing down a magical wild beast.

* A favourite line of ''Anime/DigimonSavers'''s Masaru Daimon.
** Typically, dubs don't carry this phrase over, substituting it for something that sounds more badass to the Western ear, but the Savers dub, ''Digimon Data Squad'', actually uses this phrase frequently. And since [[spoiler:Kurata]] is the biggest monster in the Digi-verse (yes, even Myotismon has met his match) everyone gets a chance to say it more than a few times. The dub of ''Anime/DigimonTamers,'' on the other hand, used it once, by [[TheHero Takato]] and [[DarkIsNotEvil Guilmon]] as [[KnightInShiningArmor Gallantmon]]. It was [[LampshadeHanging Lampshaded]] by [[BadassBiker Beelzemon]], who said "You can't ''forgive'' me? I don't recall ever ''asking'' for forgiveness!" And then the fight was on. It's not {{Narm}}ful like the Data Squad version because Gallantmon didn't dramatically yell it, but stated it in a more matter-of-fact "this is why I must kill you" manner, befitting a literal KnightInShiningArmor.

* Used by TheIngenue Eve Genoard near the end of the ''LightNovel/{{Baccano}}!'' light novel ''Drugs and Dominoes'', after she learns that [[spoiler:Gustavo]] [[YouKilledMyFather killed her father and brother]]. She almost shoots him, but is stopped by Luck Gandor, who [[ShootTheDog does the honors in her stead]].

* ''Manga/KatekyoHitmanReborn'' Tsuna says this when he is enraged by Byakuran [[spoiler:for triggering events that led to Uni's self-sacrifice, or self-imposed death]]. There is a good reason why that chapter was labled "The Last Blow."
** [[http://www.mangareader.net/katekyo-hitman-reborn/339/10 And again in chapter 339 to Daemon Spade]].

* Fujiwara no Mokou in the ''VideoGame/{{Touhou}}'' manga ''Inaba of the Moon and Inaba of the Earth'' likes using this trope when it comes to her bitter rival Kaguya. Face it, she just hates her so much because of the humiliation she gave her father.
* Villain example: Rosine, the BigBad of ''{{Manga/Berserk}}'''s Lost Children arc, uses this line on Guts after he [[spoiler:destroys the tree that she has been using to make her creepy little pseudo-elves out of the children she's kidnapped]], which has the effect of ''supremely'' pissing Rosine off -- badly enough in fact, that she decides to [[spoiler:[[OneWingedAngel transform into her]] ''[[OneWingedAngel true]]'' [[OneWingedAngel Apostle form, a really creepy insect-like monster]]]].
** Another villain example from Berserk: when Nosferatu Zodd's duel with Guts is interrupted, he roars this at the interlopers. This guy takes the WorthyOpponent BloodKnight dynamic ''really'' seriously.

* [[spoiler:Izaya]] from ''{{LightNovel/Durarara}}'' mumbles this during a flashback of middle school. [[spoiler:He's referring to Nakura who stabbed Shinra who is his only friend. Let's just say, Nakura was screwed the minute he stabbed Shinra by accident because of who his real target was. And 7-10 years later, Izaya extracts his revenge in the cruelest way possible.]]

* ''Manga/{{Evangelion 303}}'': Minor example. In chapter 3, after being [[OldSchoolDogFight beaten]] by [[LoveInterest Shinji]] and messing up a mission, [[FieryRedhead Asuka]] is extremely distraught and paranoid -due to several weeks of disappointments and frustrations- and she is starting to wonder if Shinji is actually trying to sabotage her. Then she angrily thinks: "This is unforgivable."

* ''FanFic/RosarioVampireBrightestDarkness'':

* Reimu Hakurei of ''VideoGame/{{Touhou}}'' uses these words when Sanae Kochiya fights her in her story run in ''Touhou Hisoutensoku'' because she accuses her of making a huge pitfall trap for her to fall into:

->''The truth is, I ain’t a hero of justice, or anything else like that. But anyone who tries to hurt my friends... is GONNA PAAAAAYYYYYY!!''

* ''WesternAnimation/ElenaOfAvalor'': [[spoiler:After Esteban's betrayal is revealed, Elena and their grandmother Luisa tell him [[RejectedApology to screw off with his apologies]] and excuses because his actions got Elena and Isabel's parents King Raul and Queen Lucia killed. Esteban desperately wants to redeem himself, but Elena eventually breaks it to him that he's BeyondRedemption, especially after [[DiggingYourselfDeeper he broke out of prison with a bunch of dangerous villains that he then teams up with to avoid taking his sentence]]. On the other hand, their grandfather Francisco [[EasilyForgiven forgives him]] because he believes he has changed while his other cousin Isabel isn't sure what to think of him yet. [[BrokenPedestal Everyone else views him with contempt]]. Elena's anger with Esteban is bad enough that she initially tries to {{unperson}} him, but she comes to terms that she still loves him and that's part of why she'll never forgive him for hurting her and everyone else so badly.]]

** The hyenas make it clear they do not appreciate Scar attempting to throw the blame for his actions onto them. After the latter's final clash with Simba, the hyena quickly make Scar pay for his betrayal.

--> '''Ed:''' [[LaughingMad Hehe!]]

* ''Anime/HanaukyoMaidTai La Verite'' episode 9. After Lemon, Marron, and Melon speak rudely to Captain Konoe Tsurugi, Konoe's lieutenant Yashima Sanae tells them "Speaking so rudely to captain...unforgivable!" She then chases them away.

** Also, in the original edit, this is Sonic's final line at the end of the finale of Season 3, obviously declared against Eggman. It was replaced in the dub by another line in the form of "Life never stays slow for long! Thank goodness! Watch out, Eggman, I'm comin' at ya full speed!"

* ''Series/StarTrekDiscovery'': Many years ago, Michael Burnham was brought to live with Sarek's family after her own parents were killed. When they were targeted by logic extremists who wanted to eliminate non-Vulcan entities on the planet, she attempted to run away. A young [[TheSpock Spock]] tried to follow her, but she [[spoiler: insulted his human heritage in an attempt to get him to stay behind]]. This incident drove them apart for years, and Spock spent many years rebuffing all attempts by Michael to reconcile with him, as he viewed this act, along with her blaming herself for the death of her parents and the outbreak of the Klingon-Federation War, as selfish acts made to make her feel more important. He even says as much in perhaps on of the most emotional moments of his life, [[TheReasonYouSuckSpeech blisteringly insulting her]] for continuing this trend, making it abundantly clear that, while they can work together to fix the threat of destruction awaiting them in the future, he cannot, and will not, ever forgive her. However, it becomes SubvertedTrope when she learns [[spoiler: Section 31 was partially responsible for her parents getting killed]], and admits he was right, leading the two to eventually reconcile.