There are three layers of deeper meaning behind Deku's newly revealed full hero name.

That is why Deku proclaimed her to be his hero in My Hero Academia chapter 429, as the two bonded over this very emotionally charged moment, and Deku held her hand to give her support. You're my Hero!

My Hero Academia's final volume promises 38 new pages of content to extend the manga's ending, with big implications about Deku's future.

Summary Deku extends a helping hand to Shigaraki, delving into his past trauma to stop him in My Hero Academia chapter 418.