Shigaraki and All For One, two of My Hero Academia’s most formidable villains, are on the verge of joining forces to become a new man who will be far more powerful than each of them individually. Almost as soon as the conclusion of Kohei Horikoshi’s My Hero Academia draws near, the series’ key antagonist All For One makes a triumphant return in the form of a fusion with his protégé, Tomura Shigaraki.
Shigaraki, like the series’ protagonist Izuku Midoriya, has long been portrayed as the heir apparent to his strong master, but it has only just become known that the most horrific repercussions of his change have become apparent.
If and when this process is completed, All For One will be more powerful than it has ever been, thus exacerbating the horrors that the heroes may have to endure.
Towards the end of chapter 330, Shigaraki finds himself in the thick of a battle with Star and Stripe, the number one superhero of the United States and a pupil of All For One’s ultimate foe, All-Might, who is also a student of All For One.
Her ability, New Order, is used to make Tomura Shigaraki die if he moves, but it fails because Shigaraki is no longer himself, as the hero discovers when she attempts to use it. In spite of the fact that Shigaraki is gradually losing his sense of self, and is uncertain whether or not he should refer to himself by his own name, All For One has not completely taken control of his body, as some fans had feared would happen.
Rather than the mentor taking over the role of the pupil, the personalities of the two adversaries are mixing to form a new individual in the storey. The ramifications of this are terrible, particularly on an existential level, as the readers witness the two merging together as if All For One were a parasite on the human body. In addition, the idea of All
For One possessing Shigaraki’s younger, healthier body, and Shigaraki possessing All For One’s superior mind cultivated over a supernaturally long life represents possibly the most significant external threat seen in the series thus far, even surpassing the way Shigaraki was able to get around Stars and Stripe’s reality-bending quirk, which was introduced in season one.
The fact that All For One’s mind is integrated with Shigaraki’s avoids a lot of the issues that Shigaraki would have faced if he had inherited such a powerful quirk on his own (or rather, collection of quirks). Even after all of the preparation his body has through, he is unlikely to be able to entirely regulate his emotions right away. Having All For One’s intelligence and experience would be able to remedy this situation.
All For One, on the other hand, appears to gain from having Shigaraki’s personality injected with his own, if only for the sake of convenience. Shigaraki’s hatred, rather than All For One merely owning Shigaraki, is what has resulted in this odd fusion; otherwise, Shigaraki’s animosity would only serve to make the supervillain a more dangerous menace. The ingenuity of All For One combined with the raw savagery of Shigaraki would make for a deadly combo.
If All For One’s plot to combine with Shigaraki goes through as planned, he may be able to carry out a far harsher vision for the world than he had originally imagined for himself and his followers. Not only will his physical strength improve as a result of assuming Shigaraki’s body and acquiring his Decay trait, but so will the intensity and hatefulness of his thoughts as well. Meanwhile, Shigaraki, who has already become into a formidable adversary, may lose a portion of himself, but he will only earn greater advantages over the heroes in the process. A win for All For One and a loss for Tomura Shigaraki results in the world of My Hero Academia losing out as a result of this predicament.