History Main / FatalFlaw

* In ''Machinima/RedVsBlue'':

* ''Machinima/Supermarioglitchy4sSuperMario64Bloopers'':

* [[LogicalFallacies Irrationality]]

* [[MyCountryRightOrWrong Excessive patriotism]]

* [[FailedASpotCheck Obliviousness]]

* [[BrutalHonesty Tactlessness]]
* [[OpenMouthInsertFoot Talking without thinking]]

** Miu Iruma's is cowardice, as she is unable to put aside her fear that one of the other students may kill her and use her talent to work together, [[spoiler:thus leading to her plotting to kill Kokichi and graduate, an attempt that is thwarted when Gonta kills her on Kokichi's suggestion]].

** Himiko has two, her childishness and unwillingness to face her feelings. During the second trial, she [[SkewedPriorities thinks her magic show is more important than clearing suspicion of her]], so she stubbornly refuses to explain how her trick works until Shuichi figures it out himself and she's forced to confirm it. She's also a major suspect in two different trials because her childish nature makes her an easy target to frame. Then in the third trial, her grief over [[spoiler: Tenko's death]] looks fake because up until then, she expressed nothing but annoyance towards her. It's only when Kokichi forces Himiko to confront her repressed emotions regarding [[spoiler: the deaths of her two closest friends, Angie and Tenko, the latter of whom actually died in her place]] that [[CharacterDevelopment Himiko is finally able to finally grieve for them and begin to express herself to honour her friend's memory.]]

** Byakuya's is {{Pride}}. His belief in his own ability leads him to disregard the seriousness of the killing game.

* This trope is present (and ''of course'' taken UpToEleven) in ''TabletopGame/{{Exalted}}'':

* In the first season of ''Series/CobraKai,'' this wasn't much of an issue. But the timber gets laid after the tournament, when Daniel introduces Robby (Johnny's son) to Miyagi-do. Then in the second season, almost everyone's core character defect is revealed: Daniel's pride, Johnny's gullibility, Sam's NeverMyFault inclinations, Tory's [[GreenEyedMonster envy,]] Demetri's snarky needling, Hawk's insecurity-fueled HairTriggerTemper, Moon's ditziness, and Robby and Miguel's respective and collective disregard for reason. The school brawl on the first day, between the RivalDojos (whose sensei were doing the best they could to move on but still had some unfinished business), took it all UpToEleven and brought them face to face with their ultimate failures.

** Steven's main flaw is his self-sacrificing nature; he tries to take everyone's burdens on himself, even when it's obviously burning him out. This is taken UpToEleven in ''WesternAnimation/StevenUniverseFuture''.

** Jin Kisuragi, headmaster of Hope's Peak, had his devotion to the academy's mission. His desire to help talented students succeed in life meant that he had a tendency to overlook the fact that some of his more talented students were ''spectacularly'' unstable people who would likely use those talents for evil. The Steering Committee he reported to were even worse in this regard, as at least Jin realized enough was enough when a student (who was enrolled behind his back) manipulated the Student Council into murdering each other.

* [[LawfulStupid Sticking to rules against reason or logic]]

* [[OpenMouthInsertFoot TalkingWithoutThinking]]

* ''Webcomic/{{Unordinary}}'': Arlo's fixation on keeping to the school's established power hierarchy keeps Arlo stuck from ever trying to improve the bullying problems that go on amongst the school's lower tiers, [[spoiler: which he finally becomes aware of after a group of Mid-tier students kidnapped and beat up a depowered Sera.]] John eventually calls him out for it in chapter 132, and threatens to destroy the hierarchy that Arlo is desperately trying to hold on to.

* Quite few show up in the ''Franchise/DanganRonpa'' series, and often result in characters dying or killing one another.

** Peko Pekoyama is unable to see herself as anything other than [[spoiler:Fuyuhiko's tool]], viewing herself and everyone else as expendable, which leads her to [[spoiler:kill Mahiru under the assumption that Fuyuhiko would be considered the true mastermind, and thus graduate after everyone else convicted her]].

** Washington's flaw is {{Revenge}}. Despite being a generally nice person, when he feels that he's wronged, he'll go to some spectacular lengths to get vengeance. This is why he brought down Project Freelancer and allied with the Meta against the Reds and Blues. [[CharacterDevelopment His time with the Blood Gulch Crew has softened him up considerably]].

** Grif's is his [[LazyBum Sloth]], but not in the normal way; he's prone to being an AchillesInHisTent.

* [[WellIntentionedExtremist Putting one's ideals above everything else]]

** Most of the primarchs had one:
** The Lion was a HorribleJudgeOfCharacter who couldn't read or relate to other people.
** Jaghatai was a loner who hardly ever associated with any of his brothers, so when the Heresy kicked off, he could trust nobody and nobody could trust him.
** Leman Russ had UndyingLoyalty which meant he never questioned orders even when they were questionable, like being ordered to burn an entire world. Also, [[{{Jerkass}} his lack of tact]] made him [[TheFriendNobodyLikes The Brother Nobody Liked]].
** Rogal Dorn's {{Determinator}} tendencies often translated as AttackAttackAttack in battle. He didn't know when to stop. The Iron Cage incident exploited this and his legion was decimated as a result.
** Roboute Guilliman had a need for control and orthodoxy that often made his thinking predictable and inflexible. This was how Fulgrim ambushed and wounded him.
** Fulgrim had an obsession with emulating his father and perfecting himself that drove him to madness.
** Perturabo always felt like his father and his brothers never valued him or his accomplishments, so when the Heresy happened he fell in line with the one brother who didn't treat him as a ButtMonkey.
** Konrad's unflinching desire for justice made him a brutal psychopath.
** Angron... Where to begin? His uncontrollable rage, his obsession with avenging his comrades, his resentment against his father for letting them all die, his inability to relate with any of his brothers because of the pain of losing his old ones on his homeworld, his NeverMyFault tendencies which made him very hard to like... Poor guy.
** Mortarian's confidence issues led to him seeing council from the wrong people.
** Magnus recklessly and arrogantly sought knowledge and power wherever he could, which led to him turning to Chaos.
** Lorgar always sought a higher meaning to dedicate himself to. When the Emperor rejected him, he turned to Chaos.
** Alpharius' desire to constantly look like the most brilliant person in the room ironically made him very easy to manipulate for both Chaos and the Cabal. Also, his ComplexityAddiction [[spoiler:which eventually resulted in his death at the hands of Dorn.]]
** And finally, Horus, who above all other things wanted glory. He hated sharing credit with his brothers and eventually he hated sharing credit with the Emperor.

** Zuko's misguided decisions in an effort to gain his cruel father's acceptance. It takes a while for him to realize Ozai has no love for his wife, his brother, or even his children.

* [[SilentScapegoat Taking too much responsibility for other people's misdeads]]