- All For Luz: Tyler Wittebane is convinced of his own moral and spiritual superiority in God's eyes, despite disowning and sending his daughter to her death for being gay and having superpowers. He also claims that he wants to protect Gravesfield from the "demons" and "monsters" that threaten his town; but has no problems sending, in his own words, murderous psychopaths after Luz, a teenaged girl, Camila, a Kindly Vet, or Pastor Domenico, a caring priest, for not fitting in his worldview or sharing his beliefs. Its a trait he shares with Belos, his Living Distant Ancestor.
- Chaos Infinity
(Sailor Moon & Sonic the Hedgehog): Subverted. Chessmaster/Mad Scientist Dr. Eggman manipulates the Sailor Scouts into thinking that Sonic and his friends are the ones responsible for the crisis in Tokyo and pushes them to fight each other, thinking that the Scouts are too much for his archenemies to handle. His plan fails when Sonic gathers enough Heroic Resolve to pull out his own Chaos Blast to overpower their rivals and calls out BOTH the Sailor Scouts and the people of Tokyo for their mistreatment. And then Eggman nearly kills Sailor Moon when using her and the Master Emerald as batteries for another one of his war machines to take out Sonic for good and everyone knew from then on who was really friend and foe. Again, it backfires. After stopping his final weapon, the Sailor Scouts and the Freedom Fighters become friends. - Cheerilee's Garden: Subverted. Cheerilee justifies her many brutal murders by claiming that she's doing the world a favor by ridding it of degenerates and corrupting influences ("weeds"), but just in case the reader wasn't already tipped off by her obvious eagerness and pleasure in committing such acts, Twilight flat-out states in the third chapter that Cheerilee is nothing more than a Hedonistic Serial Killer.
- The Law Heroine in Goddess Reborn Chronicle, whose soul was bonded to an angel-until she finds herself better treated by enemies than allies, questioning her own faith and motivations.
- Guardians, Wizards, and Kung-Fu Fighters (Jackie Chan Adventures & W.I.T.C.H.):
- Caleb is initially this, due to the intense nature of the war between Phobos and the Rebellion, before a talk with Jackie sets him straight.
- Alistar Tharquin, one of the Rebellion's leaders, is a fundamentalist both for the movement in general, and hatred of Shapeshifters in particular.
- Quentin Ross, Section 13 agent and local Rorschach expy, believes in inflexible Black-and-White Morality.
- Aldarn is showing signs of this, regarding how the Rebellion should be dealing with Phobos' supporters. This hits its boiling point when Caleb decides to ally with some of the nobility who are opposed to Phobos, which Aldarn is so disgusted by that he plots to kill Caleb and take over the Rebellion.
- Nimue is determined to wipe out all demonic threats to humanity, no matter who or what has to be sacrificed to do so.
- Kage (Jackie Chan Adventures & W.I.T.C.H.) has Kur, one of the leaders of the Meridian Rebellion. He harbors an unsettlingly extreme hatred towards the shapeshifter race and believes that their annihilation is in Meridian's best interests as much as Prince Phobos' demise. He led a pogrom during Phobos' reign, capturing and killing many shapeshifters, including children and ordinary people who simply birthed them, like Miranda's parents. Now he's plotting from the sidelines to gain Queen Elyon's support for a much larger pogrom...
- Shadows over Meridian (fan sequel of the above):
- Caleb was already showing signs of becoming extreme in his hunt for any suspected Phobos loyalists in the original story, but following the Time Skip of the events leading to the start of this fic, he has all but reached this point. He has become as mistrustful and contemptuous of the old guard as most of his rebels are, to the point of thinking them to still be loyal to Phobos and wishing for them to be imprisoned or dead. He's so taken in by the charade of "the Mage" that he absolutely refuses to believe Nerissa was impersonating her all along and lying about Jade having any prior connection to Phobos even as most of his friends are accepting the truth. He grows to hate Jade so extremely that he refuses to consider his actions led to her becoming the enemy he always assumed her to be and is open about his desire to kill her under a delusional belief that it will end the crisis he helped to create.
- The Warden of Cavigor, and at least some of his soldiers, are of the belief that anyone sent to the prison was loyal to Phobos, and that they're therefore justified in unilaterally deciding to kill all the prisoners to prevent Frost from freeing them.
- Vera Bexley views herself as a righteous crusader who'll finally put an end to the Mogriffs' threat over innocent people, but even her closest allies can see that she really just wants to wipe out all the Mogriffs because some of them killed her grandfather. Her obsession with this goal makes her willing to renounce her faith in Elyon when she pragmatically ceases the siege of Snowpoint, manipulate her closest friends into embarking on an ultimately futile suicide mission against the orders of her military superiors, and abandon them when they surrender in the face of the impossible odds — all the while dismissing all aforementioned people as cowards and weaklings. When she's holding the hatchling Bladebeak hostage and told that Metalbeak killed her grandfather because he killed numerous Mogriffs with glee and that the past queens' attempts to take their ancestral lands by force has contributed to their hostilities with humans, she still refuses to change her views.
- Vera's late grandfather Jesekiel Bexley was also convinced that he was protecting innocents from the Mogriffs when he hunted them down under the service of Meridian's past queens, but he took his convictions to needlessly sadistic levels by killing hatchlings and crushing unhatched eggs in front of their mothers before killing them as well.
- Shadows over Meridian (fan sequel of the above):
- In Origins, a Mass Effect/Star Wars/Borderlands/Halo Massive Multiplayer Crossover, Sarah a Force-sensitive Siren is absolutely convinced she's doing the right thing to stop a devastating Alien Invasion...by killing anyone in her way. This is also enforced by her creators' belief they just did a bit of Brainwashing for the Greater Good by erasing her belief that they were breaking the very rule her present killing is supposed to be enforcing (protecting sapient life).
- In the Daria multiversal Crossover Worldburner, the Warhammers (the military-tasked arm of the Corps of Ringbearers who are serving as the front-line forces in the war against the Joker Immunity-blessed Big Bad
Judith) definitely fit this trope. In order to defeat Judith, they decide that no rules apply anymore and do things such as arm anyone who asks with 'bleeding edge' weapons, destroy whole planets and solar systems, and even standing up to an agency tasked with policing time. Unfortunately, they end up mostly dying because they run afoul of The Only One Allowed to Defeat You territory, and don't want to wait for The Chosen One to arrive. The really sad part is that Fridge Logic (and an Alternate Character Interpretation) suggests that they're actually correct, in that they saved untold lives by distracting Judith (and her forces) long enough for the Worldhopper to arise and defeat her. - Star Wars vs Warhammer 40K: The Imperium of Man is an expansionist, genocidal Evil Empire that serves as the primary villainous faction of the story; but from the Imperium's perspective, they're a righteous La Résistance trying to save mankind. They violently invade and occupy the Republic worlds of Axum and Anaxes under the misguided belief that the Galactic Republic is a Vichy Earth-style dystopia oppressing humanity and that the Imperium is "liberating" those two human-populated planets by conquering them. They're also convinced that all non-humans are Always Chaotic Evil, so they try to kill every alien they encounter with almost no exception, including harmless civilians and children.
Godzilla / King Kong / MonsterVerse
- Abraxas (Hrodvitnon): In the post-story official timeline published by the author, the Director Walter Simmons thinks he's doing, in his own words, "what needs to be done" with his secret plans to go behind Monarch's backs, commit corporate subterfuge and build Mechagodzilla in secret. Though not canonically stated, it's very heavily implied that Simmons' plans are about the same as in Godzilla vs. Kong: re-establish humanity as the top dominant species, by driving the benevolent Titans into attacking cities and causing massive collateral so that he can then set Mechagodzilla on Godzilla in an Engineered Heroics gambit to take control of the Titans, all for the sake of feeding Simmons' ego.
- Recursive Fanfiction Abraxas: The Clash of Silver: Walter Simmons, and Admiral Stenz' son, believe that they're acting in mankind's best interests by planning to use Mechagodzilla to kill Godzilla and then enslave all the other Titans as agricultural Living Batteries, not caring that such actions are entirely unnecessary (especially since Godzilla and his Titan allies are consciously committed to protecting the world from truly hostile Titans), and the two villains are willing to cause all the Titans to rampage against humanity and threaten millions of people as part of their Engineered Heroics.
- Recursive Fanfiction Abraxas: The Clash of Silver
- In Forging The Sword Harry wonders why no one makes all wizards take an unbreakable vow to never hurt anyone. This leads to quite a spectacular argument with Ron on how he can even suggest such a thing.
- The Story of Apollo, Daphne and Luca: An Italian Tragedy: Vincenzo is a self-righteous and arrogant bully who, because of his obsessive romantic fantasies regarding his [1] enormous crush on Giulia, thinks that all his bad actions towards Luca (who Vincenzo sees as a cruel and manipulative little brat who hides behind a mask of fake sweetness and innocence in order to easily manipulate other people's feelings and cheating on innocent girls without repercussions) are noble.
- The Circles from the Deva Series. They firmly believe that artificial magery will lead to The End of the World as We Know It and seek to kill Hayate and friends for using Devices. Admittedly, there is a smidge of truth in their beliefs, but the extents to which they go, combined with their insistence on refusing Hayate's offers, do not help their case.
- Fairy Tales and Hokum: The Big Bad, Charles Hamilton, wants to eradicate Nazis. Good for him. Unfortunately, he works under the assumption that All Germans Are Nazis and doesn't bat an eye at the thought of annihilating the entire country, including German Jews and opponents to Nazism (and is too self-certain to consider the fact that the Army of Anubis might not stop at man-made borders).
- Very common in The Conversion Bureau stories:
- The PER believe that ponification is the right way — and the only way. Consequently, they see nothing wrong with forcibly dosing innocent civilians.
- Celestia and the Ponies often fall under this category as well (especially in The Chatoverse stories). They feel that by ponifying humans and wiping their technology from the Earth, humans can have a better and more enlightened life. In these cases, the Ponies have no qualms about committing sundry atrocities to bring about their goals .
- Both the PER and HLF qualify in "Not Just Ponies". Both of them have a firm belief that they are the heroes in saving humanity. They are both perfectly willing to commit horrible acts in their view. However, they completely misunderstand the situation at hand and are ultimately equally as bad as one another.
- Daylight Burning: Captain Shield Banner is unwavering in his loyalty, unshaken in his moral conviction, and grimly determined to oppose traitors and criminals even when these were formerly his allies. He is also living proof that there is too much of a good thing; his unwavering loyalty makes him blindly follow orders even when these conflict starkly with his ruler's previous conduct, his absolute moral conviction makes him blind to his own mistakes and the immortality of his actual deeds, and his starkly black-and-white view of loyalty leads him to immediately assume the worst of anyone formally declared a traitor.
- The Death of Princess Luna: The villains turn out to be several members of the royal guard who have thoroughly deluded themselves into believing that they're only doing the right thing by kidnapping Princess Luna, manipulating the entire kingdom into believing her to have died and keeping her inhumanely imprisoned in order to kill her at the right time on some screwed up belief that it's necessary to permanently destroy Nightmare Moon so that she won't possess some other pony's body and kill them in the process (like they believe to have happened to Luna).
- The Glass Salvo turns Princess Celestia into one of these. After seeing the warlike nature of humanity, she decides that the humans are corrupt and must be brought under the control of the Equestrians. She does this by forming the Royal Equestrian Task Force to conquer Earth and unify them under the banner of Celestia. The result is an unprovoked attack on Earth that leads to a decade long war.
- Loved and Lost: Commander Hildread, one of Jewelius' main minions, is Canterlot's ruthless and sadistic head jailer whom Shining Armor expelled from the Royal Guard for believing too much in using brutality to ensure security. While her master is a Not-So-Well-Intentioned Extremist, Hildread seems to really think it was in Equestria's best interests to bring down Shining Armor and the princesses who couldn't prevent the Changeling invasion (which Jewelius started to take over the throne). When Jewelius decides to wipe out the entire town of Ponyville along with the heroes in the climax, Hildread is disturbed by the idea of mass murdering ponies she believes she's protecting. Unfortunately, she quells any hesitations she has and remains set on her course, cementing her status as a Knight Templar. After she's defeated, her hated rival Shining Armor admits that if not for her delusional and sadistic nature, Hildread could have made a good protector of Equestria.
- Pony POV Series: One of the Alternate Universes that Applejack sees at one point is a world were the Mane Cast have become a group of dictators who brainwash and otherwise brutally suppress anything "disharmonic." They are actually based off of the Justice Lords from the Justice League series.
- Something of a recurring theme in RainbowDoubleDash's Lunaverse:
- Celestia is stated to have become Corona because of centuries upon centuries of stress from trying to keep her little ponies safe in a world full of threats. Eventually she snapped, trying to destroy every possible threat and rule every last detail of every pony's life so as to ensure that they could never get hurt again. Even in the present day, she genuinely wishes the best for Equestria, she simply is totally deluded about what that is.
- Duke Fisher seeks to take over the Night Court because he believes that only his constant vigilance protects Equestria from the surrounding nations and from Corona's wrath.
- Twilight Sparkle's brief descent into villainy originated in a genuine belief that she would make a better Element of Magic than Trixie, and a relentless determination to prove herself right.
- Applejack likewise is constantly trying to acquire more land, bits, and resources not out of greed, but because she genuinely believes that the Apple Trust is perpetually on the verge of going bankrupt and that if it does go under, all Equestria will starve.
- Ho-Oh in Poké Wars firmly believes that everything is on the table when it comes to stopping the "enslavement" of Pokémon. Even genocide of the human race. And the Pokémon who oppose him? Well, they're the enemy too.
- Rosario Vampire: Brightest Darkness:
- Hokuto Kaneshiro. He commits all manner of horrible atrocities purely for the endgame of resurrecting Alucard and watching his destroy all life on Earth, simply because he believes that all life is evil, meaningless trash, and repeatedly declares that all of his actions are for a higher cause.
- Talon Ryashen, the "Fairy Tale killer." He was turned into a Super-Soldier by Fairy Tale, and is now on a Roaring Rampage of Revenge against anyone who was ever a part of the organization. It doesn't matter if said members defected, were Locked Out of the Loop, or non-combatants; if they were even remotely a part of Fairy Tale, they're on his hit list. Case in point: despite knowing that Dark left Fairy Tale a long time ago and is one of the heroes who slew Alucard, Talon flat-out states that he doesn't care; all that matters is that Dark was a member of Fairy Tale, and thus is irredeemably evil in his eyes.
- Fairy Tale themselves. For all of their claims on monster equality, they're more focused on anti-human extremism to the point that any monster who even thinks of siding with humanity is automatically the enemy; they have personally destroyed Ahakon's hometown for refusing to side with them, and tried to do the same to Mizore's hometown twice, on top of attempting to destroy Yokai Academy for teaching coexistence. In fact, in Act VI chapter 52, after seeing Moka preach human/monster coexistence on national television, both Gairen and Raika openly state that they're beginning to see why Gyokuro hates Moka so much.
- The HDA is this throughout Act V and most of Act VI, given their Aggressive Categorism of all monsters as evil beasts. In Act V chapter 23, Marin explicitly describes their treatment of monsters as inhuman, and in Act VI chapter 25, Moka outright declares them to be nothing but a barrier in any efforts to attempt peace between humans and monsters, since they, in her words, "treat all monsters as absolute evils regardless of their nature." As of the end of Act VI, they've finally grown out of this, in part due to a Reasonable Authority Figure in their new director, Hothorne Tamaka.
- Cinderella And Prince Charming: Atlas has the classic mindset of "we are in the right, therefore it doesn't matter how many people we have to kill or threaten to get what we want." They threaten Jaune to control Cinder, arrest Jaune (after entrapping him to break the law) and torture him to drag Cinder back, and all but take over Vale. Threatening Jaune is the one that gets brought up the most; they took the one thing good about Cinder and used it against her, justifying every horrible thought she ever had.
- Null: Chivalric Arms and the Atlesian Government Conspiracy believe that promoting Atlesian ideals and enforcing their idea of world security is worth committing any and all ethics and human rights violations under the sun: kidnapping, inhumanely experimenting on and then murdering hundreds of civilians to further their research into Semblances, and planning to sterilize the Faunus population into extinction, and killing anyone else who's in the wrong place at the wrong time to cover their tracks.
- Sonic X: Dark Chaos: A common trope, particularly among the Angels and the more-fanatical Demons. The Muslims and the Emirate of Mecca take this trope up to eleven. Cosmo's mother Hertia also eventually became this, torturing Tsali's sister and killing a recently born Seedrian male child because of Daffodil's religious influence.
- Prison Island Break: Silver is the nicer kind of Knight. However he is always convinced that he is morally in the right, despite also being a murderer. His greatest fear is becoming his father.
- In the Spyro Madness Saga, we have Ember's father. He murdered his mate after learning she was Malefor's granddaughter, which would make Ember his great granddaughter. He then abandoned Ember's egg in a swamp. It only gets worse when after Ember lays an egg fathered by Spyro, he kidnaps her and fools everyone into believing she's dead. He spends the next few months torturing his own daughter! When Ember's discovered she's badly scarred and missing a horn. And all of this was just because he was paranoid and believed she was a demon. Ember then shows just how wrong he was by sparing his life and allowing the police to deal with him proving she's not a monster like him. By the way, it's Terrador.
- In Touhou canon, Yukari Yakumo is usually portrayed as the overseer of Gensokyo, when working being a Trickster Mentor to Reimu and tending the Hakurei Border. However, when a fic goes Darker and Edgier, Yukari will usually be a ruthless knight templar, that measures no consequences in order to keep the barrier up and Gensokyo safe. This goes from hunting Rin, provoking a small war with Yuuka and nearly executing Remilia for her failure in Imperfect Metamorphosis or spiriting away selfish kids to destroy the balance of Gensokyo in order to keep the place busy and prolong its lifespan in Diamond in the Rough (Touhou).
- With This Ring:
- Nabu, a Lord of Order who goes by "Doctor Fate", is "not very mentally flexible." While nominally on the side of the heroes, and even joining the Justice League, he considers his duty to Order to put him above other rules; he blackmails a powerful wizard into serving as the host for his consciousness, imprisons villains indefinitely without trial in his extradimensional tower, and goes around the world killing those whom he judges to be threats and "agents of chaos!" When the protagonist, whom Nabu already suspects to be tainted by chaos, confronts him and demands that he release his host and submit to arrest for kidnapping, Nabu dismisses the allegation, attempts to leave, and upon finding that he can't, he attacks with lethal force.
- The protagonist later meets the angels of the Silver City, who tend to be similarly closed-minded albeit usually fairly peaceful. The exceptions cause him quite a bit of trouble, such as one who attempts to burn anything demonic she finds, both putting bystanders in danger and destroying valuable evidence against the (already arrested) demonic business owner.
- Karrien Excalibris, the archangel of war, takes this up to eleven when he is sent to bring the protagonist to judgement - by killing him, and his associates, and burning anywhere he's spent a lot of time.
- A key point of A New Dawn. Dawn Bellwether is 100% convinced that her Night Howler scheme was justified because, in her eyes, all predators are heartless monsters and the world would be safer without them. There are a number of factors that go into why she believes this, including her bigoted father, the abuse she had endured while working for Lionhart, and most prominently of all, a traumatic experience as a teenager where she had been sexually assaulted by a predator. Dawn has found her place amongst prey supremacists who praise her as a hero, and it seems like nothing can change her mind... until Gideon Grey enters her life. By engaging in meaningful conversation and gently prodding at her belief system, Gideon gradually lowers Bellwether's defenses until she finally realizes that she was wrong. And afterwards, she does everything she can to undo the damage she's caused.
