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 some fanfictions, a plot twist might be that Shigaraki has a connection to one of the main heroes that no one knew about. For example, he could be related to All Might in a way that changes the whole dynamic of their fight. This adds a whole new layer of complexity to the story.
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.
In fanfics about Shigaraki from Boku no Hero Academia, he is often depicted with more complex backstories. Some fanfics explore his childhood traumas in greater detail, which gives readers a deeper understanding of his motives. For example, they might expand on how his family's neglect led to his current state of mind.
Shigaraki is a very popular character in the Boku no Hero Academia fanfic community. He is often the focus of many fan - created stories because of his complex and mysterious nature.
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 common plot twist could be that the Gamer abilities interact with the My Hero Academia world in unexpected ways. For example, the character with Gamer powers might suddenly discover a new 'game level' that is actually a secret villain lair in the MHA universe. Another popular plot twist could be the origin of the Gamer powers being tied to some ancient MHA legend. Maybe it was a power passed down from a forgotten hero who was also a gamer in a sense.
Perhaps in the fanfiction, they are in a world where quirks don't exist yet. Baby Izuku and Shigaraki grow up in an orphanage. Izuku is always the one trying to cheer everyone up and bring people together. Shigaraki is more withdrawn but Izuku keeps trying to be his friend. As they grow older, events start to shape them in ways that are different from each other, leading to different paths that are still influenced by their early bond.
One idea could be a crossover with the X - Men universe. Tomura Shigaraki's decay power could create interesting interactions with the mutants. For example, how would his power affect Wolverine's healing factor? Another could be a crossover with the Harry Potter world. Maybe he tries to infiltrate Hogwarts to steal magical artifacts, leading to battles with the students and teachers.
One interesting plot twist could be the main character's gamer abilities suddenly evolving in an unexpected way. Maybe they gain a new power that completely changes the way they interact with the world of My Hero Academia. For example, instead of just having enhanced physical stats like in the game, they can now manipulate time briefly, which throws off all their enemies and allies alike.
One interesting plot twist could be a character who was thought to be a minor villain turns out to be a double agent working for the heroes all along. This completely changes the perception of their actions throughout the story.
Perhaps the mask has some sort of hidden power that the main character discovers by accident. For example, it might be able to manipulate time on a small scale, which could be used to turn the tides in a battle or save a life at a crucial moment.