She could meet Bella Swan. They might start off as a bit of an odd couple, with Bella's more reserved nature compared to Hermione's boldness. But they could learn a lot from each other.
One possibility could be that Hermione uses her magic skills in Forks in unexpected ways. Maybe she helps the local people solve some strange problems that they can't figure out with normal means. For example, she could use a spell to find a lost item in the forest which is full of mystery in Forks.
Well, one possible plot could be Hermione using her magic skills to solve the mysteries in Forks. Maybe she senses there's something strange about the Cullens and uses her knowledge to figure out they're vampires. She could also use her intelligence to outwit the high school bullies or help her new friends with their academic problems.
At first, Hermione would likely be a bit of an outcast. But she'd soon start to make an impression. She'd adapt by using her study skills to help other students. In the library, she'd be a regular, just like at Hogwarts. She might even introduce some new study methods to the school. And as she gets to know the students better, she'd start to understand their worldviews and adapt her own behavior accordingly, while still maintaining her core values from the wizarding world.
Hermione's character might develop a more independent side. In Forks, without the constant presence of Hogwarts and her friends, she has to rely on herself more. She could become more self - assured in her decisions. Sirius, he might become more calm. The quiet of Forks could soothe his usually restless nature. He might find a new sense of purpose, perhaps in protecting the town in his own way.
In this type of fanfiction, it could be really interesting. Hermione's intelligence and magical skills from the wizarding world would contrast with the new environment in Forks. Draco, with his complex personality, would also have a lot to adjust to. Maybe they go there to start a new life away from the wizarding world's drama. They could encounter all sorts of new characters and situations that are unique to Forks, like dealing with the normal humans there while still having their magical abilities hidden.
Perhaps a new, powerful demigod - vampire hybrid that Percy has to face. This hybrid could be causing trouble in Forks, and Percy has to stop it before it destroys the delicate balance between the vampires, werewolves and humans there.
Well, perhaps Harry could be a wizard - creature hybrid. In Forks, he might discover that the vampires there have a connection to the magical world he comes from. Maybe he uses his magic to help the Cullens with some sort of threat that normal vampire powers can't handle.
One interesting plot could be Stiles forming an unlikely friendship with the Cullens. He might bring his unique sense of humor and problem - solving skills to Forks. Another plot could involve Stiles getting caught up in the vampire - werewolf drama there, perhaps using his knowledge from his own supernatural experiences to try and keep the peace. Or he could be on a mission to find something in Forks that is related to his own world's mysteries.
In the fanfiction, if Harry Vampire goes to Forks, he could potentially fall in love with a human there, just like Edward did in the original Twilight story. But his vampire nature might make things more complicated. He could have to struggle between his love for the human and his vampire instincts. Also, he might face challenges from the local vampire community if they don't accept an outsider like him.