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* In ''Manga/HaouAiren'', Hakuron seems to view his murder of Reilan this way.
* In ''Manga/{{Naruto}}'', Naruto's classmates plan to [[spoiler:kill Sasuke to prevent another war starting from Sasuke going too far and to end Naruto's suffering over his promise. They're very much NOT happy about it, though.]]
** Sasuke[[spoiler:'s brother, Itachi. Every action of his until after the timeskip and meeting with Sasuke to fight was a fašade to protect Sasuke's life, in a bitter BadGuysDoTheDirtyWork way. [[SanitySlippage Sasuke doesn't take this very well...]]]]
* ''Anime/NeonGenesisEvangelion''
** Shinji is forced [[spoiler:to kill Kaworu, the only person who truly understood him. Otherwise, humanity will be destroyed.]] What makes this even more painful is that [[spoiler: Shinji spends a minute deciding whether or not to do it, while we see a long shot of EVA-01 holding Kaworu, accompanied only by Beethoven music - ironically, Kaworu's favorite]]. Needless to say, Shinji suffers yet another HeroicBSOD after that.
** Gendo himself does this when faced with the 13th Angel, Bardiel, [[spoiler: who had just taken control of the Eva Unit 03 moments before the first test was supposed to start. When Shinji refused to destroy the Angel (and the Eva with it) due to the risk of injuring the Eva's pilot, Gendo takes control of the situation and takes Eva Unit 01 from Shinji's control, using a backup system to do the deed.]] Shinji isn't happy, and attempts a RoaringRampageOfRevenge... before being stopped by Gendo himself.
** Arguably, most of Gendou's actions could also fall under this trope, though whether or not he's being morally ambiguous for the greater good, or just a manipulative bastard is debatable for most of the series.
* Almost anything that happens in ''Anime/CodeGeass'' is this, at least from the [[GreyAndGrayMorality point of view]] of whoever is pulling the trigger. What do you expect with a world where nearly everyone is a MagnificentBastard (or a loyal minion of one) and WellIntentionedExtremist?
** The [[spoiler: [[FanNickname Euphinator Incident]]]], in which Lelouch [[spoiler: accidentally commands Euphemia to murder a stadium of families who were going to start a new life under peace. The only way to stop this is to kill Euphemia. ]]
*** Also, this is the "kindest" explanation suggested for [[spoiler: Lelouch ordering the massacre of children in the Geass Cult. Said children were already trained as {{Tyke Bomb}}s, so Lelouch fans think that they wouldn't have been ever able to adapt themselves to society - like it happened to Mao and Rolo.]] [[InternetBackdraft The subject is very, VERY prone to bring up flame wars, though.]]
*** Considering how powerful [[spoiler: Geass Users can be, even children,]] it would be nearly impossible to achieve victory without killing them. Lelouch's other plan, using his own Geass, suffers from one problem: [[spoiler: Geass that do not require eye-contact.]] Though Lelouch does acquire [[spoiler: Jeremiah,]] who can make that possible, the same event leaves him without the desire to do so.
*** Additionally, there is the incident where Rolo ganks a fellow intelligence operative for accidentally walking in on a conversation about Geass. Rolo specifically invokes this trope when Viletta criticizes him for doing so.
* ''Manga/TriGun'': When Zazie the Beast, a particularly cruel member of the Gung-Ho-Guns who happens to [[ReallySevenHundredYearsOld look like a pre-teen]], was gunned down by Wolfwood before he could kill another person. This enraged Vash, who has an extremely strict code against not killing anyone no matter what.
** Wolfwood's anime backstory reveals that most of his life consisted of shooting various dogs, but in the end regretted he could never walk a path as straight as Vash's.
* ''Manga/FullmetalAlchemist'' has Scar with an almost literal shoot-the-dog moment when he {{Mercy Kill}}s [[spoiler: the chimera that was created when Shou Tucker fused his daughter, Nina, with her dog, Alexander.]] Ironically, this doubles as a dark PetTheDog moment, as Scar expresses sympathy for [[spoiler: her]] where up until this point he had been a cold-faced killer.
** [[FourStarBadass Major General]] [[GeneralRipper Olivier Mila Armstrong]]. [[spoiler:In the GrandFinale, unlike Roy's team, they do NOT "shoot to wound".]]
--->'''Olivier:''' However... you'll find I'm not as merciful as the "Hero of Ishval"!
** When Kimbly takes Winry hostage and threatens to kill her unless Ed agrees to work for the army, Ed (reluctantly) takes a [[TakeAThirdOption third option]]: [[spoiler: He lures Kimbly into an open space while the snipers who are on Ed's side hide in the buildings around it. Unfortunately Kimbly sees through this plan before any of them can shoot.]]
* In the finale of Episode 77 of ''Anime/SonicX'', [[spoiler:Tails is forced to fire upon Cosmo, who has transformed into her adult form, and has bonded with the Metarex to form a weakpoint for Tails. Tails, having fallen in love with Cosmo, does with great sadness pull the trigger.]] The 4kids version of this is far less dramatic/sad, and actually makes [[spoiler:Tails]] look like a bit of a heartless prick.
* In the BodyHorror themed ''{{Manga/Parasyte}}'', an ally of the hero kills the creature that has killed and taken the form of[[spoiler: [[WhatHappenedToMommy the hero's mother.]]]]
* In ''Manga/YuYuHakusho'', the Urameshi Team is stuck playing a video game come to life with a little boy named Amanuma. This means that ''everything'' in the game plays out exactly the same in real life. If Yusuke and the heroes lose, they can just start over until they win; if they win, the villain, Amanuma, dies. [[AloofBigBrother Kurama]], realizing that this is a trap and that Sensui intends for them to be stuck [[WouldntHurtAChild because they can't kill a kid]], beats him anyway. What's more, he ''tells'' Amanuma ''exactly'' how things will play out to mess with his head, so that he can win faster. Amanuma, being a child, freaks out and loses in an AlasPoorVillain way. Fortunately, DeathIsCheap and Koenma has a ResetButton handy... which drains his power and prevents from stopping Sensui on his own, which was Sensui's REAL goal in setting the heroes against Amanuma.
** Incidentally, this little stunt [[ThisIsUnforgivable pisses]] [[TranquilFury off]] [[BewareTheNiceOnes Kurama]] to the point enough so that when they confront the next of Sensui's super-powered henchmen, he simply takes a step forward and decapitates the guy in a blink. [[FateWorseThanDeath And that's just the start]]...
* In ''Manga/NaruTaru'', Shiina confronts [[spoiler:her close friend Hiroko]] at her home following a number of gruesome murders committed by Oni, [[spoiler:Hiroko]]'s {{Mon}}. After failing to talk her out of her insanity, as well as the realisation that [[spoiler:her own father]] is in danger of being killed by Oni too, Shiina [[spoiler:tries strangling Hiroko to death in a rage, but finds that she can't bring herself to do it... so her own Mon Hoshimaru has to finish the job for her.]] She suffers an HeroicBSOD afterwards. In the anime, the dog ends up being [[ShootTheShaggyDog shaggy]] because the epilogue follows almost immediately afterwards.
* Rossiu's job in the second half of ''Anime/TengenToppaGurrenLagann'', which is to do the [[StrawVulcan "most logical"]] thing, while the Hero does the RuleOfCool thing. In a short time he [[spoiler: orders the execution of Simon to put down the riots (which doesn't work) and gives in to the Anti-Spiral's ultimatum, thereby trying to leave hundreds of thousands to die so he can save a tiny minority... except not, since the Anti-Spirals plan to kill ''everyone'' anyway.]]
* The main protagonists of ''Anime/WeissKreuz'' are formed into a team of assassins for the express purpose of shooting the dog whenever necessary, a point which his teammates make explicitly when Omi has a crisis of conscience.
* In ''{{LightNovel/Baccano}}!'' ''[[LightNovels Drugs and Dominoes]]'', Luck Gandor kills [[spoiler:Gustavo]] himself after preventing [[TheIngenue Eve]] from shooting him, which given the circumstances is probably this trope in action, although Luck has an attack of PostVictoryCollapse before he can explain his reasons.
* ''LightNovel/KinosJourney''. A young woman whose love was killed by a gunfighter travels the world with a male admirer, preaching nonviolence. Kino mentions that [[spoiler:it's strange they've never run into trouble. It turns out the man is a [[TheGunslinger highly-skilled gunfighter]] who is secretly killing anyone who would threaten her.]]
* In the Anime/LegendOfGalacticHeroes Gaiden ''Disgrace'', sweet innocent old lady Johanna tells Kircheis he'll have to shoot her to stop her destroying critical evidence against her husband (guilty of causing the deaths of any number of people). Kircheis just can't bring himself to do it; luckily [[spoiler:(and tragically) Keyserling, who was in love with Johanna and previously orchestrated the coverup to protect her husband, arrives to do it for him]]. Kircheis later thinks that Reinhard would have fired had he been in the same situation, and that's why it's important for them to stick together. Perhaps a reversed example as it's the sidekick, Kircheis, who needs the main character, Reinhard, to shoot his dogs for him.
* In ''Manga/ElfenLied'', during the finale [[spoiler: Kouta]] is forced to fulfill [[spoiler: a childhood promise]] to [[spoiler: Lucy]] and kill [[spoiler: her when she poses a danger to the world.]] She is also [[spoiler: falling apart]] so it could be a doubled-up example. Though both of her [[spoiler: good personas urge him to this while they have control he ]] at first lacks the will to do it. The [[spoiler: third persona, said to be the voice of her murderously-programmed DNA, then asserts control, but is ultimately in so much pain, she too urges him to do it, and this time he does.]]
** In an earlier event that serves as the anime finale, [[spoiler: Chief Kurama kills his daughter Mariko for reasons including: the fact that she has a mutation that quite arguably makes her the most dangerous person in the world, her having killed someone and being willing to do so again, and the BigBad having [[ActionBomb planted a bomb in her]] and uses it [[IHaveYourWife to force the chief to do things]] that include killing other people's children. Oh, and in the anime, [[TogetherInDeath Kurama also dies with Mariko]].]] Some would view [[spoiler: Kurama]] as an AntiVillain or AntiHero because of this and similar incidents: he keeps killing children not because he likes it, but because of the [[CrapsackWorld mutation that makes them mass-murderers]].
* Occurs towards the end of ''Anime/MobileSuitGundam00''. [[spoiler: Anew Returner has managed to break the MindControl of BigBad Ribbons Almark and is about to surrender to her lover, Lockon, who is urging her to have a HeelFaceTurn so she can join Celestial Being for real. However, Ribbons takes control again as soon as Lockon lowers his guard, forcing teammate Setsuna to kill Anew. Understandably, [[HeroicBSOD Lockon takes it badly]], but sorta recovers in a surprisingly short time.]]
** A similar example happened in ''Anime/MobileSuitGundamSeedDestiny'': [[spoiler: In episode 32, Shinn [[DefusingTheTykebomb manages to calm Stellar down]] when she [[WoobieDestroyerOfWorlds destroys everything in her path]] due to being terrified of her own possible death. Their reunion is short-lived when she spots Kira/Freedom Gundam; Stellar then recalls [[ManipulativeBastard Neo]]'s words (if she doesn't fight, she will die, and so will her friends and loved ones) and ''massively'' freaks out. Shinn tries to calm her down again to no avail.., until Kira intervenes and destroys the Destroy Gundam, killing Stellar in process.]]
* In Episode 5 of the 1968 ''{{Manga/Cyborg 009}}'' series, Joe does this.
** And he also does it halfway the 2001 series. [[spoiler: To his own puppy, Kubikuro, which had PsychicPowers and had been killing the people that ran his parents and original owner down.]] [[TearJerker It's just as sad as it sounds]]
* [[DarkMagicalGirl Reiha]] from the ''Manga/VampirePrincessMiyu'' TV series views her killings of humans [[EnemyMine when she teams up]] [[TeethClenchedTeamwork with Miyu]] like this. Specifically seen with [[spoiler: Kayo's KnightTemplarBigBrother, who goes all KnifeNut on Miyu when under a Shinma's MoreThanMindControl; Reiha freezes him to death and reprehends Miyu when she questions her. Miyu has no option but biting the grieving Kayo, turning her into an EmptyShell.]]
* What the AntiHero Ogami does in ''Manga/CodeBreaker'' right in the first chapter, though replace "Shoot" with "Break the Neck of." The aforementioned dog got mortally wounded trying to protect Sakura from a bunch of gang members, and Ogami, before burning and killing all of the bad guys, goes up to the dog and commends it for its efforts to save Sakura. And then promptly snaps its neck to "help the pain."
* In ''Manga/NabariNoOu'', [[spoiler: Aizawa kills a mission target when Kumohira's moral code makes him hesitate.]]
* ''Anime/{{Noir}}'': [[spoiler: It turns out that this is the entire purpose of the assassin duo named Noir, by becoming [[TheScapegoat a scapegoat of sorts]] for humanity, killing people so that others don't have to.]]
* In ''Manga/MahouSenseiNegima'', [[TheGunslinger Mana]] tends to do this sort of thing, such as being willing to K.O. people who are in danger of triggering the PowerIncontinence of TheWorldTree. Most recently, she [[spoiler: was going to shoot Fake!Asuna with non-lethal ammo to determine whether she was real or not. Negi stopped her, though.]]
* ''Manga/GunslingerGirl'' has [[spoiler:Jose and [[TooGoodForThisSinfulEarth Henrietta]]]] do this simultaneously in chapter 83 as part of their earlier SuicidePact.
* Near the end of ''Anime/DigimonTamers''. Janya Wong figures out a way to defeat the [[BigBad D-Reaper]]. However, this method has the nasty side effect of forcing all Digimon (specifically, the ones that just helped save the world) back into the Digital World, with no guarantee that they could ever return. At a loss for any other options, Janya goes through with it, even going so far as to trick his Digimon-loving son into helping. (Henry's reaction to this varies by translation: he forgives his father in the original Japanese, but the English dub strongly implies the opposite.)
* In ''{{Manga/Bleach}}'', at one point the quincies kill a large number (tens of thousands) of hollows, a kind of monster that WasOnceAMan. Because this eliminates the soul of the hollow in question entirely, the Soul Reapers are forced to respond by killing a corresponding number of ''their own citizens'' to maintain the balance and prevent the universe from breaking.
* In ''[[Anime/KirbyOfTheStars Kirby Right Back At Ya!]]'', we learn that Meta Knight killed Knuckle Joe's father - but only because he had to do it to ensure the safety of the galaxy and because Joe's father was mind-controlled by Nightmare and turned into a Demon Beast / monster. Luckily, his love for his son prevents him from fully surrendering to Nightmare, and before death, he gives MK his locket with Joe's baby picture in it as both a reminder of him and a sign of his love.
* ''VideoGame/TalesOfVesperia: The First Strike'' is a movie that details events that happened prior to the game. One of those events showed a sad moment where Yuri was forced to kill Lambert and two other guard dogs to free them from a trance put on them by a tentacle monster (which had been scooping up people, eating them, and [[RainOfBlood spilling their blood]]) and not only protect Hisca, but also ensure the safety of the people of Shizontania.
* In ''Manga/PandoraHearts'', Retrace LXXVIII, WellIntentionedExtremist HeroAntagonist [[spoiler:Oswald/Glen Baskerville]] attempts to execute [[spoiler:Oz, who he deems is too dangerous to let live,]] and then use the Will of the Abyss to [[spoiler:travel back in time and kill his sister Lacie before she can give birth to the Alice twins and give life to B-rabbit Oz, all to the end of avoiding the Tragedy of Sablier]].
** [[spoiler:Oswald]] having to kill [[spoiler:Lacie]] in the first place because [[spoiler:she was born a Child of Misfortune, which by nature cause interferences with the Abyss]].
* In ''Anime/PuellaMagiMadokaMagica'', [[spoiler:Homura shoots Madoka's soul gem in the third timeline, rather than allow her to turn into a witch.]]
* In ''[[Lightnovel/SwordArtOnline Sword Art Online II]]'', Kirito is approached in Gun Gale Online by a player who has a Laughing Coffin tattoo, which {{trigger}}s memories he'd repressed of [[TheseHandsHaveKilled participating]] in a mission to kill a group of [[MurderInc Black]] [[PlayerKilling Coffin]] members back in [[DeadlyGame SAO]].
* In ''Anime/UmiMonogatari'', the Elder Turtle lives by this, even telling the girls to take him down without hesitation should he be corrupted. More disturbingly, he also tells them to not hesitate in killing Sedna, which would also [[spoiler:kill her host, Urin]].
* In ''Manga/TokyoGhoul'', such an act is a major event in Yoshimura's back story. [[spoiler: His superiors forced him to kill his human lover after she was exposed as a reporter investigating their organization. Doing so was the only way he could make a clean break from them, and have the chance to hide his HalfHumanHybrid [[LivingMacGuffin child]] before they learned about it. Nearly 25 years later, they haven't stopped trying to find it and consider its very existence a threat]].
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