•  Midoriya Izuku confronts Shimura Tenko in chapter 418, unfortunately, Shimura struggles with control over his Decay Quirk.
•  Deku intervenes to prevent a disaster, offering comfort to Shimura and reminds Shimura of his childhood dreams.
•  All For One returns and threatens to take control of Shigaraki's body, marking a new twist in My Hero Academia's final act.

In Chapter 418 of My Hero Academia, Deku finally confronts Shimura Tenko in the vestige realm, hoping to convince him to fully reform. However, their conversation is interrupted before Deku can succeed.

After Nana Shimura's vestigial transfer and the conclusion of her character arc, Deku is able to interact with the version of Shimura Tenko shortly before he unlocked his Decay Quirk. Deku observes Shimura's emotional state and notices the cracks of Decay spreading across Mon, Shimura's dog. Realizing the danger, Deku intervenes by interrupting Shimura's core memory to prevent further disaster.

In My Hero Academia Chapter 418, Deku confronts Shimura Tenko in the vestige realm, realizing that Shimura still has no control over his Decay Quirk. Deku intervenes to prevent further disaster as he notices Shimura's emotional turmoil and fear. Despite the danger posed by Shimura's Quirk, Deku maintains his composure and tries to reassure him.

Shimura questions why Deku is intervening, to which Deku responds that he was moved by Shimura's tears during the Paranormal Liberation War. This revelation shakes Shimura's worldview, causing him to question his own existence and whether there is any hope for a normal life with a destructive Quirk.

As Shimura breaks down, Deku realizes that he is at a critical moment where either Shimura or Shigaraki could take control. Despite his own physical deterioration, Deku offers comfort to Shimura, recalling his own struggles during the Dark Hero Arc and the support he received from his friends. This resonates with Shimura, who briefly remembers his childhood dreams of becoming a hero.

However, the memory of his past trauma resurfaces, leading to the resurgence of the Shigaraki personality. Shigaraki feels a sense of duty to carry out his previous plans for destruction, believing that he owes it to those who have suffered under the hero society.

Meanwhile, All For One makes a return, indicating that he still has a few cards left to play in the ongoing conflict.

In a shocking turn of events, before Deku and Shigaraki's conversation could progress further, they both received a vision of Kotaro Shimura interacting with a mysterious man. This stranger, whose identity remained concealed, seemed intimately familiar with Kotaro and showed a keen interest in his family and Tenko's Quirk. The vision abruptly shifted, revealing the true identity of the mysterious figure as a giant manifestation of All For One's face rising from the ground.

This revelation suggests that All For One will take control of Shigaraki's body, exploiting the weakened states of both Shigaraki's and Shimura's consciousnesses following their recent battle. It also implies that All For One had a significant influence over the Shimura family dynamic, as he referred to Shimura as a mere vessel and claimed that Shimura had never made a choice of his own until that moment.

All For One's return marks a pivotal moment in the final act of My Hero Academia, promising to escalate the ongoing conflict to new heights and introduce further twists to the narrative.

My Hero Academia

Izuku Midoriya, a Quirkless teenager, inherits the powerful Quirk "One For All" from his idol All Might, embarking on a journey to become a hero. As he and his classmates at U.A. High School face challenges from the League of Villains, led by Shigaraki, societal unrest unfolds, leading to revelations, betrayals, and intense battles. The story culminates in a final confrontation against the League of Villains, All For One, and a transformed Shigaraki, with Izuku and his friends striving to protect a society on the brink of chaos.