Shigaraki is not dead in the manga. The storyline has many twists and turns, and his character plays a significant role, so his survival adds to the ongoing drama and suspense.
One great plot twist could be that Shigaraki has a hidden noble intention behind his actions. Maybe he's trying to expose a deeper corruption in the hero society that no one else sees. It makes readers re - evaluate his character.
In certain fanfictions, Shigaraki's redemption is tied to his past. Maybe he discovers some long - forgotten memories that make him understand his true self and that he doesn't have to be a villain. He then starts to use his power for good instead of destruction.
A 'shigaraki x femkokkuri fanfic' might explore the relationship between the two characters. It could involve character development, their interactions in different scenarios. For example, it could show how they support each other during difficult times or how their personalities clash and then gradually find common ground. It might also introduce new plot elements based on the unique characteristics of Shigaraki and femkokkuri in the fanfic's universe.