Sure, Deku takes on the role of a vigilante in the manga. It's a bold move that showcases his growth and the challenges he faces outside the conventional system of heroes.
One popular fanfiction concept could be Deku proving his worth without a quirk in the Bakudeku relationship. Maybe he uses his intelligence and strategic thinking to assist Bakugo in battles. For example, he could analyze opponents' weaknesses and come up with battle plans that Bakugo can execute. This would show that even without a quirk, Deku is an important part of their duo.
A common theme is the underdog story. Deku, being quirkless, is the ultimate underdog. He has to fight against the odds and the prejudice of a world that values quirks highly. This makes for a very compelling story as he overcomes these obstacles, often with Bakugo by his side or as his motivation.
In fanfiction, a quirkless Deku often has to rely more on his wits. Canon Deku got One For All, but in fanfic, he has to find other ways to be strong. For example, he might study different fighting styles more intensively.
One great quirkless Deku fanfiction is 'The Quirkless Hero'. In this story, Deku uses his intelligence and intense training to outwit villains. He forms an alliance with other underdog characters. It's really inspiring to see how he overcomes the odds without a quirk.
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.
Perhaps Deku discovers a dark secret about the origin of quirks and decides that the world would be better off without them. So, he starts a villainous campaign to eradicate quirks. He could form an alliance with other outcasts who have been mistreated due to their lack of quirks or abnormal quirks.
His relationship with his mother would be extremely strained. She might be in denial about her son becoming a villain and try desperately to bring him back to the light. With his former friends like Bakugo, it would turn into a bitter rivalry. Bakugo, who used to bully him, now has to face a much more dangerous and calculating Deku.
Vigilante fiction refers to stories centered around individuals who act as vigilantes. A vigilante is someone who enforces the law or punishes wrongdoers without official authorization. In this genre, you'll often find elements of action, mystery, and moral exploration. For instance, in some vigilante fiction, the protagonist may start out with good intentions but gradually cross moral lines as they pursue justice. This can lead to complex character development and interesting plot twists.