She might gain some vampire - like abilities such as enhanced strength, speed, and senses. For example, she could be able to run faster than normal wizards and have better night vision.
Well, it could lead to her being ostracized by some in the wizarding community. People might fear her new werewolf nature, just like they did with Lupin. This could make her feel isolated and struggle with her identity. She might also have to learn to control her newfound instincts, which would be a huge challenge.
Well, it could lead to a lot of things. Maybe she gets some sort of special power from the bite. In some fanfictions, a bite can be a turning point for a character's development. It might also put her in danger if it was a venomous bite or a bite from a dark creature, which could lead to a rescue mission by her friends like Harry and Ron.
Often, the story will focus on Hermione's struggle to come to terms with her new identity. She may try to find a cure at first. For instance, she might search through ancient magic texts in the library at Hogwarts.
One possible consequence could be her transformation into a werewolf. In many werewolf lore within the Harry Potter universe, a bite from a werewolf like Fenrir Greyback often leads to lycanthropy. This would mean that Hermione would have to deal with the monthly transformations, and she would likely face discrimination from some in the wizarding world who are prejudiced against werewolves.
In some fanfictions, she could be ostracized by the wizarding community due to the fear of her new condition. This could lead to her feeling isolated and having to fight for acceptance. Also, it might change her relationships with her friends. For example, Ron might be more overprotective while Harry could be more determined to find a cure for her.
There could be a whole new plotline involving the werewolf packs. Maybe Fenrir Greyback had a specific reason for biting Hermione, and his pack might be involved in some grander scheme. Hermione could be caught in the middle of a werewolf power struggle, having to decide which side to take or how to use her new position within the werewolf community to bring about peace or change.
It could be a dark wizard or witch who wants to harm her. Maybe they see her as a threat to their evil plans, so they use a bite as a form of attack. It could also be a misunderstood magical creature that was provoked or scared.
In many fanfictions, Hermione might quickly start to research ways to counteract the bite. Given her love for knowledge and problem - solving nature, she would likely dive into books and ancient magic to find a solution.