“Well, what are you waiting for? Kick the hell out of me and get your standing ovation.”
“No. Not this time. I don’t want to hurt you. I don’t want either of us to end up killing the other, but we’re running out of alternatives. Perhaps it all hinges on tonight. I don’t know what it was that bent your life out of shape, but maybe I’ve been there too. Maybe we can work together. I could rehabilitate you. You don’t need to be alone. We don’t have to kill each other. Let me help you.”
“I’m sorry, but no . . . No . . . It’s far too late for that.”
The Joker and Batman, Batman: The Killing Joke
The following contains spoilers from chapter 305 of My Hero Academia. You have been warned.
After being tested by the vestiges of One For All, Deku resolved to save Tomura Shigaraki from the influence of All For One. Even though Deku acknowledges that he might have to kill Shigaraki in the end, he has decided to only kill him as a last resort. Until then, Deku is determined to save his nemesis from himself.
While I have no doubt that Deku will manage to free Shigaraki from the vestige of All For One, I seriously doubt that Deku will be able to turn Shigaraki away from the dark side. Deku might be able to liberate Shigaraki from his mentor’s influence, but I am certain Shigaraki will continue their grudge match. Shigaraki is so completely broken that he is too far gone to be redeemed. His hatred toward hero society is absolute. Even if Shigaraki is saved, it won’t change anything between him and Deku.
Due to this, Deku might be able to get rid of the All For One vestige, but he will have to deal with a potentially greater supervillain. Shigaraki stated that he wanted to be an even greater supervillain than All For One ever was. Without the vestige of his master holding him back, he will be able to use his full power without any further distraction. I am pretty sure that Shigaraki will hunt down the original All For One and kill him. Only one of them can be the demon king of the underworld.
I look forward to seeing how the story develops fin the future.