History Sandbox / MyHeroAcademiaAllForOne

* {{Hypocrite}}: Befitting a man with absolutely no moral standards whatsoever, All For One will frequently mock others for their flaws and failings whilst showing worse traits himself, uncaring of his DoubleStandard so long as he [[BreakThemByTalking unsettles his opponent]].

* ClippedWingAngel: When his Vestige self finally gains full control of Tomura's body and shatters his psyche to prevent further upsets, he morosely notes that the damage has already been dealt to his ideal vessel through Izuku's efforts. The body is left a cracked, emaciated and partly-crumbling vision of Tomura's former self, looking hollowed-out and exhausted, Tomura's endless hatred and willpower than fuelled his overwhelming power has vanished along with his mentality, and so to has decay, given how closely interlinked the Quirk was with Tomura's mind. More personally, the Vestiges of One For All having destroyed themselves damaging Tomura like this has lead to Yoichi becoming DeaderThanDead, a realisation that emotionally hollows out All For One and leaves him an EmptyShell. He still expresses confidence that he can TakeOverTheWorld, but accepts that it will be a MeaninglessVillainVictory for him at best.

** His Vestige later regains full control of Shigaraki's body thanks to Deku's TalkingTheMonsterToDeath, but his host body is now crippled thanks to the long battle, and he literally alone while all the surviving heroes gather to bring down All For One once and for all. Even worse for All For One, the vestige of Yoichi is destroyed in the process of OFA being transferred to Shigaraki, meaning that All For One can only go through the motions of his final stand without feeling anything worth fighting for.

* LastVillainStand: The FinalBattle eventually turns into this for him: all of his plans are in ruins, his Vestige inside Shigaraki is destroyed, all of his minions are defeated, defected, or never actually loyal to him in the first place, and All For One himself mortally wounded and living on borrowed time. At the end of it, he's reduced to a literal powerless baby against Bakugo, and all he can do is fire a single Spearlike Bone tendril at him as his last effort before the Rewind energy erases him utterly.

* UndignifiedDeath: The FinalBattle becomes a long, drawn-out HumiliationConga as All For One suffers these ''multiple times'' from various parties, forced to "cheat" in order to avoid his death and becoming more and more undignified the more he denies that their efforts actually inconvenienced him. By the end, he's reduced to a naked infant who can't even speak his delusional ravings properly and dies crying out in denial to the very end.

* JokerImmunity: Intending to become the ultimate villain, All For One did everything he could to make himself impossible to kill or imprison. He has the LifeForce Quirk to extend his reign of terror for over a hundred years, Kyudai Garaki to nurse him back to health after his fight with All Might, a Rewind-based drug as a last fail safe measure should he actually die, and Tomura to be his new host through his vestige within the All For One Quirk. Thus, no matter how many times he is put down, All For One will find a way to come back as the main villain.

* LikeASonToMe: Ultimately subverted. He adopted a young Tenko Shimura when he was scared and alone after killing his family, raising the boy as a successor, nurturing his worst impulses and even bestowing him with his own family name on the boy as Tomura Shigaraki. However, All For One only really sees Tomura as his 'the next me' and an extension of himself, trying to absolutely [[DeathOfPersonality erase all traces of his individuality]] as his master plan to defeat All For One.

* EmptyShell: Throughout the series, various characters, up to the villain himself, have stated that AFO lacks the hatred, strength of will, or even depth of personality necessary to steal One for All. This seems to fly in the face of his [[EvilIsHammy enthusiastic expressions]] and fondness over his brother, up until his past as an emotionless child aimlessly massacring people left and right was shown. It was only after he read comics with Yoichi that he started displaying his signature smile and proclaimed that he would take over a world, grafting the persona of a gleeful villain onto his otherwise shallow identity. Furthermore, it's Yoichi actions and death that are the only things in the world that can elicit anything resembling legitimate in the villain, making it clear that any drive AFO has is mainly a product of the only thing that can fill his life with purpose, his brother, and that, without him, AFO is simply an empty psychopath. This is all but confirmed once Yoichi is well and truly gone: AFO's vestige can only muster a dead glare at the world around him, barely acknowledges the foes around him, and dismisses his world conquest as a meaningless endeavor he will go through for no particular reason.

* EmptyShell: Throughout the series, various characters, up to the villain himself, have stated that AFO lacks the hatred, strength of will, or even depth of personality necessary to steal One for All. This seems to fly in the face of his [[EvilIsHammy enthusiastic expressions]] and fondness over his brother, up until his past as an emotionless child aimlessly massacring people left and right was shown. It was only after he started reading comics with Yoichi that he started displaying his signature smile and proclaimed that he would take over a world, grafting the persona of a gleeful villain onto his otherwise shallow identity. Furthermore, it's Yoichi actions and death that are the only things in the world that can elicit anything resembling legitimate emotions and drive in AFO, making it clear that any drive AFO has is mainly a product of the only thing that can fill his life with purpose, his brother, and that, without him, AFO is simply an empty psychopath. This is all but confirmed once Yoichi is well and truly gone: AFO's vestige can only muster a dead glare at the world around him, barely acknowledges the threats around him, and dismisses his world conquest as a meaningless endeavor he will go through for no particular reason.

* EmptyEyes: The narration points out that his eyes have been clouded over since birth, as if covered by thin membranes. As emphasised dramatically through his and Kudo's staredown after Yoichi's death, they're [[WindowsOfTheSoul reflective]] of his heartless and self-centered nature.

* BelievingTheirOwnLies:
** Somewhat tragically, the flashbacks to his past reveal that he's always been doing this to himself regarding his own humanity. He ''does'' have some underlying empathy towards Yoichi, being uncharacteristically shaken by his brother's passing, but as he is absolutely convinced VirtueIsWeakness and only "ordinary people" feel such emotions, he's deluded himself that he doesn't want his brother's love and thinks of him only in terms of a favored possession he's lost. He claims that the BerserkerTears he shed when learning Kudo had already passed "Yoichi" onto another were something he did intentionally to confuse him, rather than an actual emotional outburst.

** The Second Holder, Kudo, is a '''major''' one to him, to the point that his hatred towards him is even stronger than his animosity for [[ArchEnemy All Might]]. This is due to blaming Kudo for [[LivingEmotionalCrutch Yoichi's]] death, because he "stole" him from the safety of the vault All For One kept his brother in, leading to his AccidentalMurder when his sibling tried to reclaim him. Kudo's last words reminding All For One that ''he'' was the one who killed Yoichi, something he was in denial about, affected him so badly that he shed BerserkerTears immediately, and the mere thought of Kudo's existence pushes him straight into homicidal rage without any of his usual joviality with toying with his enemies. Both versions of All For One, being reminded of Kudo through [[IdenticalStranger Bakugo]], instantly snap into a furious attack on him to try and erase the vision of the one person he ''despises''.

** He has gradually become this to all of Class 1-A. In between attacking them at the USJ and the Training Camp, targeting Midoriya and Bakugo at different points, and his exploitation of Aoyama, he is the overarching cause of all the strife the class faces, culminating in his final opponent not being Izuku, but [[UnknownRival Bakugo]].

* AssholeVictim: He is such a massive petty bastard to everyone that when he dies from [[DeathbyDeAging being aged backwards]] no one but his brother mourns him.

* BackFromTheDead: Thrice over: His flashback to All Might's first victory over him makes it clear he genuinely ''was'' killed by him, with his head turned into liquid, only for Garaki to somehow revive his body after stealing it from the morgue. This occurs again with him being [[ThereIsNoKillLikeOverkill nearly vaporized]] by Endeavor's flames, but this time he came prepared with a trump Card in Eri's Rewind. Then it occurs ''again'' with his Vestige self being NotQuiteDead within Tomura's MentalWorld despite being ''shredded apart'', staging a takeover when his willpower falters.

* BigBadWannabe: {{Deconstructed|Trope}}, but ultimately played straight. All For One remains the true BigBad for much of the story, but that's precisely why he begins sliding into this territory instead: he remains BigBad for ''too'' long, well past the point he's able to keep up with the heroes. The central theme of the series is about succession, one generation to the next. All For One can't accept that, eventually, he ''will'' be surpassed and so tries to hog the position from Tomura when he's well past his prime as the Symbol of Evil. Ultimately, All For One is relegated to the sidelines fighting against [[UnknownRival Bakugo]] in a vain attempt to intrude on Izuku and Tomura's climatic fight.

** More immediately, he is devoting most of the manga into successfully pulling off his long-desired goal of absorbing One For All and marking his success against Yoichi in their generation-long feud, via manipulating Tomura into absorbing the Quirk where he cannot. He claims that it's merely the "midgame goal" on his larger plan, but it's made clear that it matters as much or even more to him personally than his final aim.

* EvilerThanThou: Pulls this on Tomura when he does his grand reentry into the story, employing GrandTheftMe on him to hijack his body and free his original self from Tartarus. He claims to genuinely respect Tomura and his tenacity, and wants to merge their personalities together into one superior being so he can become a PhysicalGod, yet it becomes clear this amounts to just creating a superior clone of himself at Tomura's expense. Eventually, however, Shigaraki manages to pull this on him instead, destroying his vestige and retaking his body from All For One's control.