It could be a powerful villain who sees Naruto as a threat to his plans in the My Hero Academia world. Maybe a villain who wants to use Naruto's unique abilities for his own evil purposes and when Naruto refuses, becomes his enemy.
One idea could be Naruto somehow ending up in the My Hero Academia world and using his ninja skills in a vigilante way. For example, he might use his shadow clone jutsu to create distractions during villain attacks, which is a completely new concept in the MHA universe.
First, for your My Hero Academia Vigilante OC in fanfiction, consider their motivation. It's important. Are they fighting for revenge, or to protect a certain group of people? For example, if they had a family member who was wronged by a villain and the heroes didn't do enough, that could be a strong motivation. Next, when it comes to their skills, don't just rely on their quirk. They should have some combat training or street - smart skills. Like being able to quickly assess a situation and come up with a plan. And finally, their relationships with other characters can add depth. Maybe they have a begrudging respect for some heroes while being at odds with others.
One common theme is the struggle for justice outside the traditional hero system. Vigilantes in these fanfics often feel that the official heroes are not doing enough or are too restricted by the law, so they take matters into their own hands.
A good plot for My Hero Academia Vigilante OC fanfiction could start with the OC finding a strange quirk - enhancing drug on the streets. This leads them to investigate a new criminal organization that is creating and distributing these drugs. As they dig deeper, they realize that this organization has ties to some powerful people in the hero world. Along the way, they might meet an old friend who has turned to the dark side and is involved with the organization. They have to decide whether to save their friend or focus on taking down the organization. Another plot could be that the OC's secret identity is at risk of being exposed when a nosy journalist starts following their every move.
A quirkless vigilante in My Hero Academia fanfiction would likely have a very different origin story compared to the typical hero. They could have been bullied or discriminated against because of their lack of a quirk. This would fuel their desire to prove themselves. They might start small, like stopping petty crimes in their neighborhood. As they gain more experience and confidence, they could take on bigger threats. Their lack of a quirk would also make them more relatable to the readers, as most of us are 'quirkless' in the real world. And their journey from being an unnoticed figure to a respected vigilante would be a great story arc.
There could be a really interesting fanfiction where Momo from My Hero Academia meets Naruto. Maybe they are in a world where quirks and ninjutsu co - exist. Momo's intelligence and ability to create objects could be paired with Naruto's determination and powerful jutsus. They could go on adventures together, facing villains from both universes.
It's not strange when you consider that creativity knows no bounds. My Hero Academia characters reading Naruto fanfiction is just another example of the crossover potential in the world of fiction. It could lead to new ideas for their own world, whether it's in terms of new hero abilities or ways to deal with villains. It's all about the exchange of ideas, even if it's across different fictional realms.
Another great one is 'Vigilante Rising'. This fanfic focuses on the backstory of the vigilante. It explores how they became who they are and their reasons for operating outside the law in the My Hero Academia world. The action scenes are well - written, and the relationships between the characters are engaging.