* The OYAJI, from the manga of the same name, is a bloody extreme example of this. We dare you.....No, we '''DOUBLE DARE''' you to lay a finger on anyone in his family!
** [[spoiler:The last time two yakuza members tried to burn his family alive, their whole gang ended up being ''massacred'' in the most brutal way possible and then burnt to ash! The scary part? This was done ''right in their own base'' by the old man with a shovel all lone!]]
** Heck! Even [[spoiler:his would-be son-in-law learned this in a very,''very'' '''painful''' way!]]
* Just ''{{t|emptingFate}}ry'' and hurt a kid in front of CaptainHarlock.
* ''{{Mazinger}}'':
** Kenzo Kabuto from ''Anime/MazingerZ'' and ''Anime/GreatMazinger''. It is arguable if [[DisappearedDad he was]] [[ParentalAbandonment or was not]] [[DaddyHadAGoodReasonForAbandoningYou a good father]]. It is not arguable when his older biological son was about of being killed he sent a HumongousMecha after the people was attacking him, and when his adoptive son was about of being killed, he blew his assailant [[spoiler:and himself]] up. Therefore, althought his parental skills left much to be desired, you DON´T try to hurt his sons.
** Danbei Makiba from ''Anime/UFORoboGrendizer''. If he thinks you are going to hurt his daughter, he WILL hang you with his bare hands. Or shoot your brains out (the only reason Kouji and Duke are alive is because his aim is awful). If he entrusts you to drive his daughter somewhere he'll load his shotgun in front of you as he warns she BETTER does not get harm in any way, shape or form.
* Henry Maaka from ''Manga/{{Karin}}'' is usually a weak-willed wuss, but when his daughter Karin is in trouble, he will literally let himself ''burn'' to rescue her from the hospital people who think she's an IllGirl, but could potentially discover that she's a vampire.
** Most people try to kill vampires with stakes. Henry uses ''uprooted trees''.
* ''HellTeacherNube'' - You do NOT mess with Meisuke Nueno's, a.k.a. Nube's, TrueCompanions. "Leave (insert names) ALONE!" is his {{Catchphrase}} and signifies that he's about to [[LetsGetDangerous open a can]] [[CrouchingMoronHiddenBadass of serious whoopass]].
* Negi Springfield of ''MahouSenseiNegima'', despite being four or five years ''younger'' than his charges. Threaten his students, and he will pull the spear you impaled him on out of his chest and beat you half to death with it.
** Takahata is this way as well, but to Asuna in particular he's an adoptive father. Although only because his self esteem is too low to be her boyfriend.
** It is implied at first, then outright stated, that Nagi [[spoiler: and later Negi]] saved the world because it was the only way to save Asuna, [[spoiler: an ArtificialHuman girl who was used as a BarrierMaiden and, in the past, ''horribly'' treated by those who kept her prisioner ''and'' used her AntiMagic powers for their own benefit.]]
* Oga from ''Manga/{{Beelzebub}}'' seems to not care for Beel, but, if you put a finger on the baby... [[spoiler:In chapter 107 he openly declares himself to be Beel's parent, emphasizing this trope even more.]]
* ''Manga/{{Bleach}}'': When Nnoitra threatens Yachiru, she warns him Kenpachi will be angry. Kenpachi dismisses it, but when Nnoitra does try to kill Yachiru, Kenpachi leaps into action. Later, when Yachiru is at Gremmy's mercy, he's interrupted from killing her by Kenpachi who admits he only turned up because Yachiru's reiatsu had become very weak.
** In hte same arc, there's Byakuya, who cuts down [[LargeHam Zoomari]] because he threatened his "pride".
* As Seto Kaiba of ''Anime/YuGiOh'' tries to inform people, it is [[BerserkButton a big mistake]] to threaten his little brother Mokuba, [[PromotionToParent to whom he's been a father since they were ten- and five-years-old]].[[note]]And yet people do it again... [[TooDumbToLive and again...and again...]][[/note]]
* In the second sequel series ''Anime/YuGiOh5Ds'', Crow goes on a RoaringRampageOfRevenge when he returns after the appearance of the Dark Signers' evil fog to find out the kids he's taken in have all vanished.
** Also Jeager (to an extent). You may not be able to tell when you meet him, but he'll do anything for his son. (In one episode, when he and his family were down on his luck, he went hungry in order to feed his wife and son, telling them he'd "already eaten". Unfortunately, he's a BadLiar.)
* Napolean from ''Anime/YuGiOhGX'' is an interesting case. He ''wants'' to be his son Martin's protector, but he can't; as a teacher at Duel Academy, showing favoritism towards a student is a professional taboo, so he's forced to isolate himself from Martin (one of the hardest things he ever did, as he put it). [[spoiler: As fate would have it, Martin becomes the victim of DemonicPossession, courtesy of [[BigBad Yubel]], at which point Napolean pleads with Judai to help him.]]
* Konzen's (Sanzo's [[{{Reincarnation}} pre-incarnation]]) CharacterDevelopment in the ''Manga/{{Saiyuki}} [[{{Prequel}} Gaiden]]'' manga is maturing from a spoiled, bitchy, bored bureaucrat into a slightly less spoiled and bitchy Papa Wolf for Goku. The man has high-heeled sandals and no athletic abilities, yet he jumps off a stories-high stairwell/elevator shaft, catches the falling Goku, and clutches the severed elevator cable in mid-air. All to save his boy! The [[ForegoneConclusion fact that Konzen's gonna die before the end and Goku will be locked away in a mountain without any of his memories of being so devotedly loved]] makes this all the more heartbreaking.
** For that matter, in the present timeline, Sanzo's furious response and following HeroicBSOD when [[spoiler: Goku was shot and almost died]] fits this trope to a T.
*** Goku himself to Sanzo. Particularly since hurting Sanzo is a sure way to press his BerserkButton and his UnstoppableRage.
** Also, Hakkai. Don't threaten or hurt his comrades. [[TranquilFury Just]] [[CurbStompBattle DON'T!]]
* Whenever he learns that his daughter Ran Mouri and/or his charge Conan Edogawa are or have been in danger, ''Manga/DetectiveConan'''s [[BumblingDad Kogoro]] [[OneOfTheKids Mouri]] is definitely ''not'' pleased. And you do NOT want to provoke a man who looks and acts like a slob, yet is a National-level judoka ''and'' [[CrouchingMoronHiddenBadass acts at his most competent]] when ItsPersonal. More than one suspect has been at the receiving end of a powerful judo throw for this.
** He also acts ''a lot'' more professional [[HarmfulToMinors when he knows a child's life is at stake]]; this is seen in the kidnapping episode.
** [[TheLestrade Inspector Juzo Megure]] is also ''very'' protective of the kids who hang out with Mouri and of his own subordinates. Better shown when he goes ItsPersonal mode in a case involving young women being attacked: he refuses to let ActionGirl Satou act as a decoy once his BerserkButton was pressed, and later took ''a metal pipe to his head'' while protecting Sonoko from the culprit. [[spoiler: It's explained that this comes from one of his first cases, where he failed to protect a schoolgirl posing as a decoy and she almost died. Fortunately, the girl got better... [[MayDecemberRomance and then they got]] HappilyMarried.]]
** While there are many Papa Wolves and {{Mama Bear}}s among the {{Sympathetic Murderer}}s, there was a specially dark take on this trope during a two-part anime only episode. [[spoiler: A businessman named Ushio Bunzou had contacted Kogoro to locate an assassin whom he had hired to kill him, having backed off the deal but not being able to find him and tell him so. It turned out that Bunzou was using Kogoro and others in a BatmanGambit destined to '''find and kill said hitman with his own hands''', since one of his assassinations jobs led to the accidental death of the tycoon's beloved daughter Chisato. Conan had to beg the grieving and ''very'' pissed off Bunzou to not exact said revenge and damn himself [[LoveMakesYouEvil in the name of his little girl]], but he also made sure that the hitman's threat was neutralised and he was taken into custody.]]
* ''DragonBall'' and its sequels have a lot of dads, but the grand master of this trope is Piccolo, to the point where his constant and epically badass rescues of his pupil Gohan become something of a RunningGag.
** Gohan's ''actual'' dad, Goku, can be as much as a PapaWolf as Piccolo. Goku did rush (with Piccolo, no less) to finish his long-lost brother Raditz after he kicked off the reunion by kidnapping little Gohan. ([[HeroicSacrifice He died]], [[BackFromTheDead but came back]]), and then saved Gohan's life after Piccolo died with Kinto'un, and beat up [[TheBrute Nappa]], the one responsible. But [[BerserkButton what really set Goku off]] [[AndYourLittleDogToo was when Frieza threatened to kill Gohan]]. That drove Goku past the edge and turned him from the kind, gentle IdiotHero into a [[SuperpoweredEvilSide vengeance-filled warrior]].
** Despite wanting nothing to do with Future Trunks (usually ignoring him or just pushing him aside whenever Trunks tried to reach out to him), Vegeta [[BerserkButton went crazy]] after [[spoiler:Cell killed Trunks]].
-->"How could I let this happen to my son? He [[spoiler: has sacrificed everything for me]] and I have done nothing but ignore him. I won’t give up on him! There is still time to change things. [[spoiler: Cell]] has crossed me for the last time! He has tricked me in battle, mocked my Saiyan ancestry, but '''''this'''''! This time he has gone too far! ''' He will pay the ultimate price for what he has done to my son!'''"
** The NonSerialMovie ''Bojack Unbound'' has Goku, despite being ''dead'', attacking BigBad Bojack for trying to BearHug Gohan to death. And he succeeded, giving Gohan the encouragement and strength he needed to win.
*** Throughout the movie, Vegeta appeared to have lost his passion for fighting since Goku died, not even watching the competition. But when Trunks was in danger, he immediately sensed something was wrong and headed to the battlefield, making a BigDamnHeroes moment to help Trunks out of a tight spot.
** An old man in the episode "Free the Future", while Android 18 was blowing things up after getting angered with Android 17 for killing a boy she thought was cute, attempted to shoot Android 17 (as that boy was in fact his son). It failed, because Android 17 was resistant to gunfire, and needed saving by the time Trunks arrived.
** This is also ''inverted'', as there's a common theme throughout the show where whenever Goku or Piccolo is in immediate, life-threatening peril, Gohan snaps and proceeds to kick the bad guy around until the latter stops moving.
* Yusuke from ''Manga/YuYuHakusho'' is a subtle example. Harming/killing at least ''one'' of his loved ones gets mad, but if it's Keiko or Kuwabara, '''''he will kick their ass!'''''
** The best example comes from the battle against Suzaku, who was stronger than Yusuke, capable of creating six clones of himself (all strong as the original) and, once he clones himself, has to be killed alongside all his clones, because leaving just one barely alive will only lead to him absorb the rest, heal himself and summon six clones. Obviously Yusuke was having a lot of trouble, but as soon as Suzaku treathened Keiko he ''killed six of the Suzakus (including the original) and greviously wounded the seventh''. At that point Yusuke was exhausted, but the survivor had absorbed the others to heal and cloned himself again... At which point Yusuke used the power of his own soul (a move that nearly killed him) to recover the strength, and ''overpowered and killed all the Suzakus at once''.
* ''Manga/OnePiece'' has Captain Whitebeard, [[spoiler:formerly]] one of the four most powerful pirates in the world. An attack on one of the Whitebeard Pirates is never forgiven and his reactions are legendary-when the World Government sentenced his adoptive son and lieutenant Ace to death, everyone involved knew immediately that it was effectively an outright declaration of war.
** After [[spoiler:Ace's death]], instead of going [[UnstoppableRage insane with rage]] like most had expected, Whitebeard in a frightful and calm way [[spoiler:defeated his ''very'' powerful murderer Akainu in two blows and, in the same blow, split the entire Marine island in half... despite being stabbed, blown up, gutted and with half his face burnt off. All to avenge poor Ace's death]]. [[TranquilFury And you thought Whitebeard on a rampage was bad?]]
** There's also Chef Zeff, who was like this towards the young Sanji. [[VolleyingInsults When they didn't chew each other up, of course]]. This *is* the [[RetiredBadass ex-pirate]] who either [[spoiler:ate his own leg so child Sanji would have enough food to survive]] in the manga or [[spoiler:had [[AnArmAndALeg the same leg cut off]] to rescue the kid from drowning when the ship he worked in was sunk]] in the anime, after all.
** Shanks, when Luffy is threatened. There is a ''reason'' why he lost that arm of his...
** Luffy himself is a version of this trope, as any attack on the physical or emotional well-being of his crewmembers is taken personally and likely to result in an angry and violent beatdown, like he did when Nami had a hertbreaking HeroicBSOD once her efforts to save her village were thwarted by her BadBoss and he epically beat up and defeated said boss. Prior to the TimeSkip, however, he was just a fledgling, made clear from [[spoiler:the fact that he wasn't quite strong enough to back up this fierce protective instinct yet. He found that out the hard way in Shabaody, where the entire crew was more or less beaten half to death and scattered to the four corners of the Earth by Bartholomew Kuma and he was helpless to stop it. But especially, considering the fact that Kuma was on their side, that was ''nothing'' compared to when he went to TheAlcatraz and then the World Government's headquarters to rescue his older brother from execution, only to have him die in his arms.]] Seriously, if he hadn't had Jinbe there to [[GetAholdOfYourselfMan knock some sense into him]], he wouldn't have been able to [[TookALevelInBadass Take A Level In Badass]] to transcend pretty much all the limitations he had, and then some.
*** Zoro too. He's normally not the type to take revenge. But Ohm made him reconsider that when he set traps that brutally injured Chopper. Also, when Robin was almost killed by Enel, he caught her before she fell (despite his earlier distrust against her) and furiously attacked Enel as a result. In fact, any member of the Straw Hats will beat up '''anyone''' who dares to hurt their TrueCompanions, as proven when the Franky Family beat up Usopp, and the remaining male members returned the favour and destroyed their house in retaliation.
** Garp is a Grandpa Wolf who would have killed [[spoiler: Akainu for killing Ace]] if Sengoku, the ''Fleet Admiral'', hadn't stopped him. He even tells Sengoku to keep him down or he would have tore [[spoiler: Akainu]] to pieces.
*** Also, [[spoiler: Luffy's actual father Dragon the Revolutionary]] has appeared only once or twice, but one of these apparitions puts him squarely here. When Luffy was about to be arrested by Smoker...[[spoiler:Dragon shows up and keeps him from using his weapon. Then a gust of green wind blows through the island, freeing Luffy from Smoker's clutches. It hasn't yet been revealed if the wind was Dragon's doing, but...]]
*** Smoker himself acts as a Papa Wolf to his subordinates, especially Tashigi. [[spoiler:He doesn't hesitate jumping in to save Tashigi and his men from Trafalgar Law telling them to run away and taking him on his own. Also he was really worried and shocked about his men when they get caught in a huge explosion. Then, when he finds out Vergo attacked them, he lays a beat down on him, and [[ILetYouWin allows himself to lose their battle]], in order to get Law back his heart, who has major issues with Vergo from the past. In short, you do not screw with the men under Smoker "The White Hunter", or you ''will'' regret it.]]
* ''Manga/AxisPowersHetalia'''s Antonio aka Spain goes from DotingParent TeamMom to Papa Wolf as soon as his protégé, Romano/South Italy, is kidnapped by Sadiq/Turkey.
** While it's not been seen in canon, fanon sometimes makes [[TeamDad England]] this towards [[LoveFreak America]]. [[FanPreferredCouple When not pairing them up, that is.]]
* RurouniKenshin gives us the tragic deconstruction of [[spoiler:[[BareFistedMonk Yukyuzan Anji]] from the Juppongatana]]. There was a [[FriendToAllLivingThings peaceful, gentle Buddhist monk]] who sheltered the children of rebels against the Meiji Government. The villagers didn't like it, [[MoralEventHorizon so they ambushed the monk, injured him and burnt the orphanage along with the children, killing them all.]] Poor monk [[FreakOut snapped]], subjected himself to TrainingFromHell for five years and bloodily killed all the villagers responsible with his own bare hands. [[spoiler:And that's how Anji [[StartOfDarkness joined]] [[BigBad Makoto Shishio]], since the ''very'' GenreSavvy Shishio let him [[MoralityPet have credibility to spare lives if he wished so]] in return for recruiting him. And he did it, saving Misao from Usui's stab InTheBack at one point.]]
** Kenshin, however, manages to reconstruct the trope and play it straight. When he fell through the DespairEventHorizon due to [[spoiler: believing that his girlfriend Kaoru had been massacred by Enishi and his group]], what brought him back to his senses was [[spoiler: Yahiko's girlfriend Tsubame telling him that Yahiko was fighting Enishi's group alone. Few later, Kenshin pulls a massive BigDamnHeroes to save Yahiko.]]
* ''Manga/FullmetalAlchemist'': "Don't EVER mock my son." Screw with Hohenheim's kids and you're in trouble. Not only that, but he's willing [[spoiler: to sacrifice his own life to bring his youngest son Al back from the Gate]], and when asked by Ed why would he do such a thing, he calmly replies, "Because I'm your father".
** Maes Hughes also counts, telling several party-going toddlers not to "try anything" with his daughter. Complete with ScaryShinyGlasses and DramaticGunCock. It's PlayedForLaughs, but you know that if anyone ever really ''did'' threaten his beloved Elicia, there'd be hell to pay.
*** Roy Mustang is also this even if [[AFatherToHisMen not in the traditional sense]]. Do NOT ever harm his subordinates.
* Kenshiro in ''FistOfTheNorthStar''. Anyone threatening, never mind hitting, Bat or Lin is to endure a rather slow and painful and [[YourHeadAsplode explosive]] death.
** There's an interesting straight use ''and'' subversion of this trope, pulled off by the same character (a villain). He's the leader of a wolf-themed gang, and one of their raiding parties gets their asses handed to them by Kenshiro. When he finds the bodies, [[RoaringRampageOfRevenge he howls for vengeance]], taking the rest of the pack with him to hunt for Kenshiro. The subversion comes from the fact that when they are utterly defeated by [[BackToBackBadasses Kenshiro and Rei]], one of the midgets in his gang comes up to him and asks for help. He tells him to get lost, that he can start a new pack anytime he wants. [[YourHeadAsplode Then they all die]].
* In the second OAV based on the video game ''FatalFury'', titled ''FATAL FURY 2: THE NEW BATTLE'', lead hero/fighter Terry "The Wolf" Bogard has lost his will to fight and live after being beaten by Wolfgang Krauser, only to have a street kid named Tony tag along with him. Tony, who lost his father in a street fight and works as a shoe shine-boy to support his mom Elsa, worships Terry's reputation as a fighter and wants to be his disciple. After the defeat, Terry [[HeroicBSOD spends half the special getting drunk and not caring about anything]]... It is only after Axel Hawk, the heavyweight boxing champion of the world, orders his sparring partner to beat Tony within an inch of his life in a bar (after Terry drunkenly refused to fight Hawk when challenged), does Terry rise out of his funk...and drops Hawk with ONE PUNCH. Even Hawk can't believe it (as his inner narration mentions).
** In TheMovie, Kim Kaphwan gets to show off his Papa Wolf credentials as well. When [[spoiler:a BrainwashedAndCrazy Cheng Sinzan]] steps into a party he's attending with the main cast and his family, Kim offers to fight him so his two kids can see him kick ass. His rival, however, soon starts wiping the floor with him, so much that Joe has to be stopped by Andy from breaking in... but the very moment one of the Kim boys begs his daddy to not lose, [[HesBack Kim brings himself back]] and [[CurbStompBattle completely curb stomps his enemy]] with a single Ho-oh Kyaku.
* Tendo Soun of ''[[RanmaOneHalf Ranma ˝]]'' isn't as BadAss as most of the cast, but disrespect any of his three little girls and you'll realize that he hasn't forgotten much of Happosai's TrainingFromHell. Saotome Genma, on the other hand, is [[InvoluntaryShapeshifting cursed to transform]] into a literal "Papa (panda) bear". See the opening statement on why this trope is named "Papa Wolf" and not "Papa Bear" and you'll understand the {{Fanon}} that Jusenkyo curses are PersonalityPowers.
** Soun's biggest PapaWolf moment comes when his eldest daughter, [[YamatoNadeshiko Kasumi]], is possessed by the oni that makes you do evil things. He valiantly tries to endure because he couldn't bear to hurt his own daughter (a blow to the head usually gets it to leave), and shows he's a true father [[TakeMeInstead when he badassedly tells the thing to take his body instead, and get the hell out of his daughter.]]
* ''TsubasaReservoirChronicle''. [[spoiler:Clone/Father Syaoran]]. BigDamnHeroes with his MamaBear wife.
** Kurogane is like this. Though he has an initially calm attitude when Seishiro "kills" Syaoran in Oto, you can just tell there's the hint of death in his dialogue and in his face. Though it's hard to tell if he's more mad about Syaoran's "death" or Fai's. Either way, don't mess with anybody in his party.
* ''ZettaiKarenChildren'''s Koichi Minamoto is basically just a normal guy who tasked to watch [[PersonOfMassDestruction three powerful girls with insane psychic power.]] But when he gets pissed off enough, such as if someone harms his girls or they're harming themselves, you'll understand [[BadAssNormal why they made him guardian of those girls.]]
* Otaru from ''Anime/SaberMarionetteJ'' to X. [[spoiler:Granted, he was a father for only episode and half, but he surely proved to be quite a PapaWolf!]]
* More of a Babysitter Wolf than a PapaWolf, but coming close enough, because in ''DevilMayCryTheAnimatedSeries'', [[VideoGame/DevilMayCry Dante]] never failed to protect Patty.
* Sesshoumaru from ''{{InuYasha}}'' usually [[RedOniBlueOni doesn't get too excited about much]]. Threaten [[MoralityPet Rin]], though, and a beatdown like none other will commence. The best example comes from the manga... [[spoiler:when Rin is taken to the underworld by a hellhound, Sesshoumaru follows and kills it. When she is already dead, [[DidYouJustPunchOutCthulhu whoops the King of Hell's ass]] to get her back. When this doesn't work, he actually shows the closest thing to human emotion he's ever done in the series, purifies the souls of the dead as an afterthought, then rips a hole back into normal reality. After all of this, his youkai queen mother acknowledges this and uses her powers to resurrect Rin since ''Sesshoumaru'', of all people, is clearly unhappy about her death. He goes from AloofBigBrother to a combination of John Creasy, Jesus, and Spawn.]]
* [[spoiler:Kou Shouka]] in ''SaiunkokuMonogatari'' is mostly a [[spoiler:RetiredBadass who prefers to employ ObfuscatingStupidity and play the role of]] BumblingDad. When his children are threatened, however, he goes out for ''blood.''
* Despite being the hero of ''LoneWolfAndCub'', Ogami Itto averts this trope. He considers his four-year old son to be something more akin to a [[TrueCompanions True Companion]] than a child in need of protection. While he will walk through hell to help his battle buddy, as any samurai should, death in the line of duty is a professional hazard, and not something to be shyed away from. Not even if you're four.
* Despite being the youngest (male) of the group, ''Anime/MobileSuitGundam00'''s Setsuna F. Seiei is quite the PapaWolf for his teammates in season two. This is so pronounced that [[spoiler:sensing his comrades all on the brink of death pissed him off to the point that he unknowingly initiates the "Trans-AM burst mode", completely turning the tide of the battle.]]
** An ironic example is Sergei Smirnov, who ''has'' been called [[MemeticMutation ''Papa Bear'']] (because in-universe he's [[RedBaron nicknamed]] "the Wild Bear of Russia") by fans with the description of Papa Wolf in mind. He ''did'' fit the Papa Bear description given above regarding his treatment of his son Andrei, but with Soma Peries he was Papa Bear all the way.
* In one of the ''Anime/MobileSuitGundamWing'' mangas, [[spoiler:Marticus Rex aka King Peacecraft]] performs a badass YouShallNotPass [[http://aboutgundamwing.com/Pending/chronicle6.jpg in the middle of a burning palace]], so his butler and his NumberTwo can take his daughter [[spoiler:Relena]] to safety. He doesn't make it alive, but the others manage to reach safety with the little girl, [[spoiler: who later becomes a key player in the story.]]
* Spirit Albarn/Deathscythe from ''SoulEater'' would like to think of himself as a Papa Wolf and certainly steps in whenever his daughter Maka's in serious trouble, but he's [[LovableSexManiac a little too much of an unrepentant womanizer]] [[AmazinglyEmbarrassingParents for her to take seriously]]. He still had a pretty goof PapaWolf moment with his DynamicEntry when defending her and Soul from Crona.
** Also note his reaction to Medusa's [[AbusiveParents claims about her child]] [[TheWoobie Crona]]; [[BewareTheSillyOnes for the first time in the series]], [[BerserkButton Spirit is upset and]] '''[[BerserkButton angry]]'''.
** Sid adopted Black*Star as a child [[spoiler:after his entire clan was destroyed]], and becomes this to him.
* ''Manga/BlackLagoon''[='=]s Ginji Matsuzaki. Do not even ''look'' at his protégé [[YakuzaPrincess Yukio]] wrong, or this BadAss swordsman will cut you down. Ask about what he did to [[JerkAss Chaka]], to start...
** Rokuro Okajima aka Rock. As seen with Gretel, Garcia, and later, Yukio, he'll go to great lengths to shelter children and teenagers from harm. Kidnapping and then molesting and abusing Yukio is a good way to make this [[BewaretheNiceOnes usually]] mild-mannered, diplomatic and well-spoken former {{Salaryman}} angry enough to actually [[PrecisionFStrike cuss you out]] and [[NonActionGuy physically assault you.]]
* ''Manga/FairyTail'': You can do anything to him, even completely destroy his guild and Makarov will only get irritated, but if you hurt any of his guild members, there's a very good chance he will make you stop breathing.
* Don't so much as think of threatening Pinoko or Manga/BlackJack will cut you to ribbons. Then sew you back up. Then charge you everything you're worth for the trouble... Yeah, it's just that kind of story.
** Also, when a child's life is in danger, expect Black Jack to work ''even harder'' for the kid's sake. Or to deal even harsher gambits in an attempt to make others empathize with said kid.
* While not a biological father, Sousou/Cao Cao from ''IkkiTousen'' is this towards his friends. So much, that his SuperpoweredEvilSide took full control of him whenever he saw them in danger. It first happened with [[spoiler:his UnluckyChildhoodFriend Chuukou (he thought the bullies at their judo club were attempting to rape her)]], and later with [[spoiler:his {{Bash Brother|s}} Kakouton (who lost his eye while shielding him))]]. And in the anime series, he also recruited [[spoiler: Myousai]] by protecting her from a rapist and offering her a chance to be his subordinate and fighter instead of [[spoiler: a ChildSoldier.]]
* They may have marital problems in ''{{Macross 7}}'', but don't ever think of threatening any of their children or their city or their ship; coz when MamaBear Milia and PapaWolf Max Jenius [[BattleCouple team up]], you are definitely screwed. Especially emphasized on their killer combo attack in [[VideoGame/SuperRobotWarsAlpha Super Robot Wars Alpha 3]] as seen [[http://www.youtube.com/watch?v=in4mkxx-W30 here]].
* [[spoiler:Minato Namikaze aka the Fourth Hokage]] from ''Manga/{{Naruto}}''. In fact, the whole deal with [[spoiler:the Kyuubi]] has just recently been revealed as the struggle between him and [[spoiler:Tobi, with Tobi]] using [[spoiler:Minato's]] love for his [[BattleCouple wife/partner]] [[spoiler:Kushina (then-host of the Nine-tailed fox)]] and their newborn son [[spoiler:Naruto (future host of the same Fox) for his advantage. [[HeroicSacrifice And we already know]] [[ThanatosGambit how THAT ended]]...]]
** Chouza Akimichi also deserves a mention for [[TakingTheBullet throwing himself in front of his son Chouji to protect him from Pain]], almost getting himself killed in the process. He does it again [[spoiler: against the undead Asuma.]]
** Hizashi Hyuga deserves a mention here, as the mere ''realization'' that his son Neji is a member of the Branch Family sends him into a murderous rage (which is stopped before it can begin courtesy of Hiashi activating his curse seal - and doing so is the first step in causing Neji to spend at least nine years of his life afterward as the inversion of this trope!)
** Also Hiashi for killing that Cloud ninja for attempting to kidnap Hinata.
** [[spoiler: Maito Dai, Gai's father, certainly seems to count in Gai's flashback. Despite being known as "the eternal Genin", he follows/finds Gai's team while they're being cornered by the Seven Swordsmen of the Mist and unlocks the Eight Gates, killing himself to protect his son.]]
* In ''{{Pluto}}'', love for his child broke through a robot's [[ThreeLawsCompliant aversion to killing]], and was then used against him to kill him.
--> '''[[spoiler:Gesicht:]]''' Even if the world ends, I won't let you go.
* One of the weirdest ([[MadDoctor and]] [[TheFaceless that's]] [[{{Cloudcuckoolander}} saying]] [[RefugeInAudacity it]] [[LargeHam NICELY]]) examples ever is Dr. Shingen Kishitani from ''{{Durarara}}''. In the novels, we learn that [[spoiler: Shingen was the one who cut Celty's head off and sold Saika's sword off to the Sonoharas... but he did it in order to protect his young son Shinra from Namie Yagiri's grandfather, who threatened to kill Shinra if he didn't.]]
* ''Manga/BlackCat''. Have some nefarious scheme for [[CuteBruiser Eve]]? Want to study the nanomachines that she uses? Feeling compelled to [[ForTheEvulz dissect her just because you can]]? Pray to the god of every religion you've ever known that Train and Sven don't find out about it. Especially the former of the two.
* In ''FruitsBasket'', we have Kazuma Sohma, foster father to Kyo Sohma. In one chapter of the manga, Kazuma proclaims his intent to protect Kyo single-handedly from the [[BigScrewedUpFamily entire Sohma family]] if he must.
** There's also a sketch in one of the later volumes, where Kazuma meets with Kyo's {{Jerkass}} of a father, cheerfully telling him that now that [[spoiler:the Zodiac curse has been broken and Kyo is free]], it's time they had a little talk about Kyo's future. Kyo's father looks like he's pissing himself in fear. It's PlayedForLaughs, but given the psychological abuse the father heaped on Kyo (at one point he accuses Kyo of trying to kill him ''for standing too close to him''), it's very much impressive.
* In ''Manga/HowIBecameAPokemonCard'', a Dragonite goes on a wild rampage when he thought his son was kidnapped by humans.
* Not even a freaking ''typhoon'' could stop [[Anime/MawaruPenguindrum Kenzan Takakura]] from getting medical attention for his ill daughter Himari. And he still had enough pluck to shield one of his sons, Kanba, from a falling lamp. And had his other son Shouma been there, he would've protect the kid too.
* In ''Manga/HappyYarouWedding'', Yuuhi is very much one. Because his own childhood was so lonely he wants to give Shouta the best childhood he can and is fiercely protective over him.
* Kotetsu T. Kaburagi of TigerAndBunny may have a strained relationship with his daughter, Kaede, due to his job as a superhero (which she isn't aware of) meaning that he has to spend a lot of time away from home, but he's not about to let anything harm his little girl. This is showcased [[spoiler: when he lifts a collapsed tree to save Kaede from a collapsing shrine ''even when his powers run out'', and later, when Maverick has a gun to Kaede's head, Kotetsu reveals himself to be NotQuiteDead and punches Maverick in the face.]]
* James of {{Anime/Pokemon}} fame is rather protective of his Pokémon in the Sinnoh arc, especially Mime Jr. (which is a ''baby'' Pokemon, by the way). Sometimes he goes as far as [[EnemyMine teaming up with Ash and company just to keep them safe]]. Oh, and when Jessie and Meowth refused to help out one of those times, ''he attacked them''.
** Ash himself counts too. Countless times, he has put his life on the line without hesitation to save his Pokemon. And for that matter, Ash's Pokemon can be fiercely protective of their owner... Just ask his Grovyle, who had been BroughtDownToNormal due to an HeroicBSOD, but recovered his powers out of sheer willpower upon seeing Ash in lethal danger!
** In the fifth movie, Latios is a Brother Wolf to Latias. He refuses to let any strangers into their secret garden, and is even willing to sacrifice his life just so his sister and the town of Alto Mare could be safe.
* The titular Onizuka from ''GreatTeacherOnizuka'' who goes through great lengths to protect his students. In fact, you don't even have to be his student. He will rescue you anyways. This includes getting shot multiple times in an attempt to rescue a school girl (who happened to be trying to discredit him as a teacher) he saw being kidnapped while on his way to take an exam.
* Sai Nanohara from Anime/JubeiChan is almost always a BumblingDad, but once he learns that his daughter Jiyu is the reincarnation and SoulJar of YagyuJubei, he decides to not stay aside and does what he can to help her. In fact, his first PapaWolf act was [[spoiler: calling out ''YagyuJubei himself'' upon his treatment of Jiyu. '''To Jubei's very face'''.]] And in the GrandFinale of the first season, Sai also [[spoiler: manages to give Jiyu/Jubei a CooldownHug to dispossess her from Jubei's influence, putting himself at great risk to do so.]]
* ''KenichiTheMightiestDisciple'' gives us a number of examples. The most prominent ones are [[BadassGrandpa Hayato Furinji]], who's a Grandpa Wolf for his biological granddaughter Miu and also for Kenichi to a degree; Sakaki Shio and Apachai Hopachai, two of the Ryozanpakou masters who train Kenichi and will go all-out to protect him if he's in serious trouble; and most recently [[spoiler:''the BigBad himself'', Saiga Furinji, who joined Kenichi's group in disguise to [[EvenEvilHasLovedOnes rescue the kidnapped Miu, his daughter]].]]
** Not to mention Kenichi's father, Mototsugu Shirahima, who, when he found out just how brutal Kenichi's training was, tried to escape with Kenichi from the masters. He even tried to save his son from a boulder that was rocketing towards them, regardless how futile it was.
* Guts from ''{{Berserk}}'' acts like this toward the CuteWitch Schierke, and toward his TrueCompanions in general. Ironically, he doesn't act too much like this toward his [[spoiler: insinuated]] son, the mysterious [[CreepyChild Moonchild,]] but most likely because [[MamaBear Casca]] won't let Guts near the little boy or because whenever the Child does appear, larger than normal battle shit happens and they never spend any "quality" time together. However, when the latter happens, [[ParentsInDistress the roles get switched.]]
* Daikichi from BunnyDrop makes for a realistic example, by adopting a 6 year old no one wanted to take responsibility for, and doing [[YouAreWorthHell whatever it takes]] just to make sure she gets a decent childhood. [[ManlyGuysDoingManlyThings Commander Badass]] would be proud.
* In the ''VideoGame/StreetFighterIV'' OAV ''The Ties that Bind'', none other than [[spoiler: Ken Masters]] becomes this. With good reason: [[spoiler: his wife Eliza has been abducted by Crimson Viper, and then he learns that ''she's pregnant''.]] This is so awesome from his part that [[spoiler: Viper herself]] notes that the massive fighting power he displayed was no slouch compared with [[spoiler: none other than Ryu's ''Satsui no Hado''. (And might as well be the Power of Nothingness that opposes said SNH)]]; considering how [[SpiritedCompetitor cheerful and cocky]] the dude is, it puts on perspective '''how fucking pissed off he was'''.
* ''Manga/BlueExorcist'': Shiro Fujimoto probably counts, though he doesn't [[DeathByOriginStory really get that much screen time]]. HOWEVER: He ''[[DyingMomentofAwesome killed]]'' ''[[HeroicSacrifice himself]]'' to keep {{Satan}} away from [[AntiAntiChrist Rin]] and all things said and mentioned about him afterwards suggests that he devoted his life to protecting Rin and Yukio once he adopted them.
* ''LightNovel/ACertainMagicalIndex'': Have you harmed or threatened Last Order? If yes, then you are a dead man walking. The only question is how much of your body will remain after Accelerator annihilates you.
* Kirby himself in ''[[KirbyOfTheStars Kirby Right Back at ya!]]'' In one episode, Kirby adopted a baby Galbo from its egg and raised it all by himself. Then when [[JerkAss King Dedede]] buys an adult to fool Kirby, [[spoiler:only to wind up having the baby [[HeroicSacrifice sacrifice itself to save his adopted daddy]]]], needless to say, Kirby was [[PlayingWithFire pissed]]...
* Haruka's [[RaisedByGrandparents grandfather]] Zenzou in ''Manga/KotouraSan'' can be violently protective of her granddaughter, despite being a PervertDad as well--He's the first person to stand by her as she's [[AllTheOtherReindeer being rejected by the society]] for her {{telepathy}}. The word ''society'' includes his daughter Kumiko, or Haruka's mother. In fact, he [[IHaveNoSon disowned]] Kumiko ''as'' the latter disowned Haruka, and when he comes across her again some 10 years later, the first thing out of his mouth is a warning that he never wanted to see her again. [[spoiler: The two only reconciled as Kumiko and Haruka reconcile.]] When he first meets Moritani in episode 6, he implies quite clearly that he knows what she did to Haruka[[note]](She asked thugs to attack Haruka's UnderstandingBoyfriend Manabe, which indirectly broke Haruka out of HopeIsScary.)[[/note]] and that she isn't off the hook with him.
* ''Manga/AnimalLand'' contains several animals that are this.