Updated Oct 10, 2026· 4 min read

Key takeaways

  • Shigaraki’s awakening at the end of the Paranormal Liberation War (roughly chapters 253–306). His body finishes its modification mid-battle, and his Decay stops being a touch-based quirk. The moment matters less for the destruction than for what Deku sees: a small, crying child buried under all of it. That image becomes the entire logic of the final fight.
  • Star and Stripe’s sacrifice (roughly chapters 330–334). The United States’ number one hero fights the All For One–possessed Shigaraki and loses, but makes sure New Order dies with her instead of joining his arsenal, stripping several quirks out of his stockpile in the process.
  • Bakugo’s death and Edgeshot’s trade. Shigaraki lands a fatal wound on Bakugo, and Edgeshot folds his own body into Bakugo’s chest to act as a replacement heart — the reason Bakugo is still standing for the war’s last stretch.
  • Deku arrives at the floating U.A. The battlefield has been lifted off the ground so a decay front can’t reach civilians, which also means nobody can retreat from it.
  • The vestige world. Deku’s last punch is thrown with arms already ruined, and what it really buys him is the door into the internal battlefield where the fight is actually settled: the All For One vestige against the boy it groomed.
  • Shigaraki’s choice. Offered control of his own body one final time, Tenko Shimura turns Decay on All For One’s vestige instead of on Deku.

Deku wins the final fight against Tomura Shigaraki — but not on damage dealt. He wins because he refuses to treat Shigaraki as a monster to be deleted, reaches the crying child at the center of him, and because Shigaraki, given one honest choice, destroys All For One himself rather than let his mentor keep wearing his body. Every big number in this battle — 100% output, six inherited quirks, a decay front that eats whole city blocks — exists to explain what that decision costs both of them.

Spoilers ahead for the entire ending of the My Hero Academia manga, including the Final War arc and the epilogue that closed the series in August 2024.

What each fighter brings into the final battle

Deku: nine holders, six extra quirks, one breaking body

By the Final War, Deku is running One For All at a level none of the eight previous holders managed, because the stockpiled quirk finally landed in a user who can host six extra quirks at once: Blackwhip, Smokescreen, Float, Danger Sense, Fa Jin and Gearshift. His body’s honest ceiling sits around 45%; Fa Jin lets him bank kinetic energy for a “faux 100%,” and Gearshift lets him shift the speed of himself and whatever he touches, which is how he pushes past 100% in short bursts. The catch is the same one that has followed him since chapter one: his arms are the weakest link. Gearshift’s recoil plus years of 100% punches mean the fight is a race against his own tendons.

Shigaraki: Decay, a rebuilt body, and a stolen arsenal

Shigaraki enters this battle as something Dr. Garaki engineered: a body modified to hold multiple quirks, Super Regeneration, strength and speed in All Might’s bracket, and All For One itself stacked on top of his own Decay — which by now no longer needs a hand on the target, spreading outward as a front that eats everything in its radius. On paper he is the strongest character in the series. The catch is internal: All For One’s vestige is fighting him for control of the same body, and Decay never learned to spare its own user.

Head-to-head: the numbers behind the mha deku vs shigaraki final fight

Attribute Izuku Midoriya (Deku) Tomura Shigaraki
Height 166 cm (5’5″) 175 cm (5’9″)
Quirks in play One For All (9th holder) + 6 inherited quirks Decay + All For One + a stockpile of stolen quirks
Practical ceiling ~45% sustained; faux 100% via Fa Jin; above 100% in bursts with Gearshift Decay wave measured in city blocks; regeneration that shrugs off All Might-class hits
Durability Ordinary human frame, permanently damaged arms Rebuilt, Nomu-adjacent body with Super Regeneration
Main weakness His own limbs and Gearshift’s recoil All For One’s possession, and Decay turning inward
Win condition Reach the person, not the monster Erase everything, including the memory of Tenko Shimura

Turning points, in order

  • Shigaraki’s awakening at the end of the Paranormal Liberation War (roughly chapters 253–306). His body finishes its modification mid-battle, and his Decay stops being a touch-based quirk. The moment matters less for the destruction than for what Deku sees: a small, crying child buried under all of it. That image becomes the entire logic of the final fight.
  • Star and Stripe’s sacrifice (roughly chapters 330–334). The United States’ number one hero fights the All For One–possessed Shigaraki and loses, but makes sure New Order dies with her instead of joining his arsenal, stripping several quirks out of his stockpile in the process.
  • Bakugo’s death and Edgeshot’s trade. Shigaraki lands a fatal wound on Bakugo, and Edgeshot folds his own body into Bakugo’s chest to act as a replacement heart — the reason Bakugo is still standing for the war’s last stretch.
  • Deku arrives at the floating U.A. The battlefield has been lifted off the ground so a decay front can’t reach civilians, which also means nobody can retreat from it.
  • The vestige world. Deku’s last punch is thrown with arms already ruined, and what it really buys him is the door into the internal battlefield where the fight is actually settled: the All For One vestige against the boy it groomed.
  • Shigaraki’s choice. Offered control of his own body one final time, Tenko Shimura turns Decay on All For One’s vestige instead of on Deku.

Motivations: what each of them is actually fighting for

Deku’s motivation is the one that splits the heroes’ plan. The strategy going into the Final War treats Shigaraki as a target to be stopped at any cost; Deku insists on saving him, which is not naivety but the logical end of his “win to save, save to win” creed. He isn’t fighting to defeat a villain — he’s fighting to prove that the crying child was a person the whole time.

Shigaraki’s motivation is narrower and sadder: he is the hero of the people nobody saved. The League of Villains was his family, and his answer to a world that threw them away is to destroy it. The tragedy of the final battle is that the two of them want the same thing from opposite directions — recognition. Deku offers it; All For One never did.

Who “wins” depends on which fight you mean

If the question is… Answer Why
Who wins a straight power contest, both at full strength? Shigaraki Decay plus regeneration plus All For One’s stockpile outclasses anything Deku can sustain.
H
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