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.
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.
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.
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 to create an OC vigilante who has a unique quirk that's not very flashy but extremely useful in stealth situations, like the ability to blend into shadows completely. This would add an interesting dynamic as they could move around unnoticed by villains and even some heroes. Another idea is to have the OC vigilante be from a family with a bad reputation in the hero world, so they have to fight against the stigma while trying to do good.
One great Deku x Uraraka fanfic is 'A Blossoming Bond'. It beautifully captures their relationship development from classmates to something more. The author does a great job of showing how Uraraka's admiration for Deku grows over time and how Deku starts to see her in a different light. Another one is 'Love in the Hero Academia' which focuses on their adventures together and how their feelings for each other are tested during difficult situations.
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.
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, focus on their backstory. Why did they become a vigilante? Was it a personal tragedy, like losing a loved one to a villain's attack? Then, think about their quirk and how it shapes their methods. For example, if they have a fire - based quirk, they might be more brash and direct in their approach. Also, consider their relationships with other characters. Do they have a mentor who is also a vigilante? Or are they constantly at odds with the official heroes?