Deku technically “loses” his Quirk, One For All, twice in the late My Hero Academia manga: first when Shigaraki steals one of the individual powers within OFA, and finally when Deku burns away and gives up the remaining embers of OFA in the last battle, leaving him effectively quirkless at the end of the story.

Quick Scoop

In the final war arc, Deku’s clash with Tomura Shigaraki pushes One For All to its absolute limit, both inside Deku’s body and within the vestige world that connects their Quirk factors. As the fight escalates, each time Deku passes or uses a stored Quirk at full power, a piece of OFA’s accumulated strength disappears for good.

  • Shigaraki manages to make physical contact long enough to steal one of Deku’s internal OFA abilities, showing that OFA is not completely “theft-proof” once their Quirk factors are directly linked.
  • Later, as Deku overextends himself to stop Shigaraki for good, the stored Quirks and power inside One For All burn out, leaving him with only faint “embers” of OFA and severely damaged arms.

How Deku Ends Up Quirkless

By the conclusion of the manga, Deku has essentially returned to the quirkless state he began with, but this time after fulfilling OFA’s purpose.

  1. One For All was always described as a power meant to be used up to defeat the ultimate evil and then fade away, rather than be hoarded forever.
  1. During the final confrontation, Deku chooses to spend what’s left of OFA to reach Shigaraki emotionally and stop him, not just overpower him, which accelerates the disappearance of the Quirk.
  1. When the battle ends, only traces of One For All remain, and Deku can no longer use the Quirk in any meaningful way, effectively “losing” it and ending the series as a hero without powers.

Fandom Reactions and Forum Talk

Because this has been a big talking point online, a lot of forum and article discussions frame it as “Deku becomes quirkless again” or ask whether One For All was really taken or simply used up.

  • Some posts focus on the twist where Shigaraki successfully steals part of Deku’s power, calling it one of the wildest moments in the final stretch of chapters.
  • Others debate whether Deku should have remained quirkless from the start, or if ending quirkless after saving the world is a more fitting full‑circle resolution to his arc.

Storytelling Angle

From a story perspective, Deku losing his Quirk at the end reinforces the idea that being a hero is about choices, sacrifice, and ideals rather than raw power.

  • His journey closes the loop: he starts quirkless, becomes the inheritor of a legendary power, uses it to change the world, and then lets it go once its mission is complete.
  • Many readers see this as a deliberate “passing of the torch” ending, where OFA is no longer needed and Deku continues as a symbol of hope even without superhuman abilities.

TL;DR: Deku loses his Quirk, One For All, during the final war as Shigaraki steals a part of it and Deku burns out the rest in their last battle, leaving him basically quirkless again by the series’ conclusion.

Information gathered from public forums or data available on the internet and portrayed here.