The Ultra Instinct in a fanfiction might also have an impact on the character's growth. It could be a new milestone in their hero journey. Instead of just relying on their existing quirks, they have this new ability to master. This could lead to new relationships and rivalries. Other characters might be in awe or jealous of this new power, which would create more drama and tension within the story.
In a fanfiction, Ultra Instinct could bring in elements from the Dragon Ball universe where it originated. This cross - over of concepts could attract fans of both series. It might inspire new types of training regimes for the characters in My Hero Academia. Maybe they have to focus on mental clarity and physical control in a way they haven't before. This could open up a whole new world of exploration for the author, both in terms of character development and the overall plot.
Todoroki might be another likely character. He has a complex power set and has been through a lot of emotional and physical growth. His struggle to control his two quirks could be a parallel to the control needed for Ultra Instinct. If he can master the balance within himself, it could potentially lead to the awakening of Ultra Instinct in him.
It can expand the lore. For example, if a fanfiction gives a character an overpowered quirk, it might make readers think about how such a quirk could exist in the original My Hero Academia world. It could inspire new ideas about the origin of quirks or how society would adapt to such powerful abilities.
The Izuku Luck Quirk in fanfiction could also impact his training at U.A. His luck might make him find rare training materials or encounter mentors who were not part of the original story. This could accelerate his growth as a hero. Moreover, his relationships with classmates could be different. His luck could make him seem more mysterious to his peers. Some might be jealous of his quirk, while others might be curious and want to team up with him more often. This would lead to a different dynamic within Class 1 - A.
In time travel fanfictions of My Hero Academia, it could affect the storyline in many ways. If Deku could time travel, he might go back to tell All Might not to push himself so hard and avoid his injury. This would mean All Might could be a stronger symbol of peace for longer. Also, time travel could be used to expose hidden secrets of the villains earlier. For instance, if someone went back to the time when the League of Villains was forming, they could gather intel and prevent some of their attacks. This would disrupt the villains' plans and give the heroes an upper hand.
The presence of Dark Naruto in My Hero Academia fanfiction would change things quite a bit. His combat skills and his chakra - based powers would be very different from the quirks in MHA. This could lead to some interesting battles and power - up scenarios. For example, how would heroes like All Might or Deku react to someone with such different powers? Moreover, Dark Naruto's backstory of being an outcast in his own village could parallel some of the characters in MHA who also face discrimination. This could lead to some complex character interactions and story arcs.
Well, Wolverine could fit into the My Hero Academia storyline as a foreign hero or a special guest. His mutant powers would be seen as a very unique form of 'quirk' in the MHA world. He could be brought in to train the students at UA, sharing his combat experience which is far different from what they usually get. Maybe he could be part of a special international hero exchange program.
If Naruto with the Rinnegan were in My Hero Academia, the power dynamics would be crazy. His abilities like the Six Paths powers could make him one of the top heroes instantly. For example, his ability to absorb and release ninjutsu could be seen as a quirk. And his combat experience from the Naruto world would give him an edge in battles against villains in MHA.
One idea could be a Phoenix - themed villain. The Phoenix has the power of rebirth, so this villain could constantly come back stronger after being defeated. They could target the main characters, causing chaos in the hero society. Maybe they're after a powerful relic that's related to the Phoenix legend.
Shigaraki would likely be dismissive. He's so focused on his own goals of destroying the hero society that he'd see fanfiction as a useless distraction. However, if there were elements in the Genshin Impact fanfic that could somehow be related to his own plans, like powerful artifacts or magic that could be used for destruction, he might take a second look.
The storyline could be about a quirkless cop who overcomes the odds. In a world full of quirks, he might use his wits and training. He could be solving crimes that are related to quirk - using villains. His journey could show that you don't need a quirk to be a hero.