It could be that Naruto was influenced by a powerful villain in the My Hero Academia world. This villain could have promised Naruto something he always wanted, like true acceptance or power beyond his wildest dreams. So, Naruto turned to the dark side. In a fanfiction, this could lead to really interesting battles and character interactions, especially with the heroes of My Hero Academia.
Perhaps in this fanfiction, Naruto's past traumas from his own world were exploited. He had already faced so much rejection in the Leaf Village at times. In the My Hero Academia world, if he faced similar or worse rejections, it could push him over the edge to become a villain. He might use his unique ninja abilities in unexpected and dangerous ways against the heroes, creating a whole new dynamic in the story.
Well, if Naruto with the Rinnegan were a villain in My Hero Academia fanfiction, it would be a huge shift in the power balance. His Rinnegan gives him access to a variety of powerful abilities. He could use the Asura Path to create mechanical weapons and attack the heroes. The heroes would need to band together and come up with new strategies. His motives as a villain could also be complex, perhaps influenced by his experiences in the Naruto world. This would add depth to the fanfic and make it a very interesting read as the heroes struggle to understand and defeat him.
Another idea is that Tony Stark could be from an alternate universe where his technology is a form of quirk. He gets transported to the My Hero Academia universe. His charisma and intelligence would make him a very interesting character in this new world. He might even start his own hero agency, using his resources to train and support new heroes.
He might face distrust from other heroes and students. Since his father is a villain, people would be suspicious of his motives. For instance, teachers at U.A. might keep a closer eye on him compared to other students.
Dabi could also be a main villain in such a fanfiction. His mysterious past and his powerful fire - based quirk would make for an exciting addition to UA. He could go to UA to spy on the heroes - in - training, but end up getting involved in their lives more than he expected. His cynical view of the hero society would clash with the positive environment at UA, and he might even start to question his own motives while there.
To create a compelling villain in My Hero Academia OC fanfiction, first, give them a unique quirk. It should be powerful yet have some limitations. For example, a quirk that can control time but only for a few seconds at a time. Second, develop their backstory. Maybe they were once a hero-hopeful but were betrayed by the hero society. This would give them a reason to turn to villainy. Finally, give them a distinct personality. They could be charming yet extremely cruel, like the Joker from Batman.
She could be influenced by a villain's ideology. For instance, if she was convinced that the current hero system is unfair and only benefits the strong. She might start to target heroes who she thinks abuse their power. Using her quirk, she'd be a formidable foe as she can manipulate gravity around objects and people.
To create compelling characters in My Hero Academia villain - hero fanfiction, first understand the existing character archetypes in the series. For villains, think about their motives. Are they after power like Overhaul? Or do they have a more complex backstory like Shigaraki? For heroes, don't just rely on their quirks. Develop their personalities, like All Might's unwavering sense of justice. Also, consider how they interact with each other. A hero and a villain could have a shared past that shapes their present relationship.
Luffy's rubber powers could be seen as a very unique quirk. He could use his stretching abilities for both offense and defense. For example, he could stretch his arms to grab villains from a distance or use his body to shield others from attacks.
One possible story could be that Uraraka turns villain due to being corrupted by power. Maybe she starts to use her quirk for self - gain, like stealing valuable items and floating them away. She could form an alliance with other villains, believing that the hero society has failed her.
Well, a 'My Hero Academia Villain Killer' fanfiction can be really exciting. It often explores the darker side of the MHA universe. Some fanfictions in this genre might focus on a new character who has a vendetta against villains. They could introduce unique powers and moral dilemmas. For example, the character might struggle with the line between justice and revenge while taking on the most heinous villains in the series. It adds a whole new layer to the already rich MHA world.