The bullies could also be influenced by their parents or the village's general perception of Naruto. If the adults in the village see Naruto as a troublemaker or a potential danger (maybe because of the Nine - Tails within him), the kids might pick up on that and bully him as a way to fit in with the adults' views.
Sometimes, bullies just pick on those they perceive as different. Naruto has a very outgoing and somewhat boisterous personality. This makes him stand out in the more traditional and reserved ninja school environment. So, the bullies might target him simply because he doesn't conform to the norm.
Well, Naruto has a strong sense of justice. He can't stand to see anyone being bullied, especially someone he cares about like Sakura. He might also want to prove himself. By standing up to the bullies, he shows that he's not the weakling some people think he is.
It could be some of the lesser - known badniks that team up to bully Sonic. Since they can't defeat him on their own, they figure that by ganging up on him and bullying him, they can at least make his life difficult.
Well, perhaps Naruto has been observing Ino for a while and when he finally sees the school bullies picking on her, he steps in without hesitation. He might use his Uzumaki charm to first try and talk the bullies down. But if that doesn't work, he'd be ready to fight. His Rasengan might not be necessary but his basic ninja skills would be enough to send those bullies running. And this event could be the start of a closer friendship between Naruto and Ino.
In fanfiction, it could be some of the Slytherin students. They might be jealous of Harry's fame as 'The Boy Who Lived' or his friendship with popular Gryffindors. Malfoy and his cronies are often depicted as bullies in the original series, so they are likely candidates in the fanfiction as well.
Well, the bullies can be shown as part of a group. They follow the lead of one main bully, like a pack mentality. They might be the typical jock - type characters who think physical strength gives them the right to bully others. They're often not very bright, just relying on brute force. And in some fanfictions, they're presented as having a bit of a conscience deep down, but they suppress it in order to fit in with their bully friends.
Well, it could be some students who are part of a clique that doesn't like Velvet's quiet and introverted nature. They might see her as an easy target. Another possibility is that there could be some characters who have a grudge against Velvet for some past incident that we don't know about yet in the fanfictions. Also, there might be bullies who are just following the crowd and think it's cool to pick on Velvet.
It could also be his boisterous personality. Naruto is very outgoing and sometimes a bit of a troublemaker in his attempts to get attention. This might annoy some of the more reserved or studious kids at school, leading them to bully him as a way to try and make him conform or be quiet.
It could be a symbolic way of showing the destruction of hope. In the Naruto series, Naruto represents hope. By having Hinata kill him, the writer might be trying to convey a sense of hopelessness or the end of an era. This could be part of a larger, more complex story about the fall of the ninja world as we know it in the Naruto franchise.
There could be several reasons. One might be that they simply have a dislike for the Naruto franchise and are using this extreme concept as a form of protest in a very unorthodox way. Another possibility is that they are just exploring some really dark and unethical ideas for the sake of creativity, without considering the negative impact it could have on the fans of the series. It's also possible that they don't fully understand the significance and positive influence of the Naruto character and are just making a random and inappropriate statement through this fanfiction.
The plot could start with Hinata being alone in a secluded part of the village and the bullies spotting her. They start to tease her about her family or her lack of confidence. Naruto, who has a strong sense of justice, comes across the scene. He uses his skills and his reputation as a hero to scare the bullies away. After that, Hinata and Naruto have a moment where Hinata thanks Naruto, and Naruto encourages her to be more assertive.