She might be initially shocked. But being Hermione, she would quickly gather her wits and start planning. She could use her vast knowledge of magic to find her way or to signal her friends.
One possible reason could be a misunderstanding. Maybe her friends thought she was following but she got distracted by something, like a new spell she saw in an old book. So they unknowingly left her behind.
In some cases, the antagonist could be a group of magical creatures that have been wronged by wizards in the past. They see Hermione as a representative of the wizarding world and when she is left behind, they try to make her pay for the past wrongs. These creatures could have unique powers and abilities that make them a formidable foe for Hermione.
Harry and Ron might use a distraction spell. They could create a commotion outside the place where Hermione is being held. While the captors are distracted, they could sneak in and untie her.
Harry and Ron would probably be very worried. They'd rush to her side immediately. Harry might use his skills to try and find a way to heal her quickly, while Ron would be freaking out a bit but also trying to be helpful.
This title immediately makes me think that the fanfiction might be a very emotional and perhaps controversial read. Hermione is a smart and strong character, so the idea of her being abused by her friends is quite a departure from the norm. It could be interesting if the story uses this as a way to show her growth and how she copes with such a difficult situation.
This is a really disturbing concept. Fanfiction often takes creative liberties, but this seems quite extreme. It could potentially explore themes of betrayal and the darker side of relationships. Maybe the author wants to show how Hermione, despite being a strong character, can be broken down by those she trusts. However, it's important to note that this goes against the general spirit of the original series where friendship is a positive force.
One possible reason could be a misunderstanding. Maybe there was a miscommunication between Hermione and her friends, which led to them leaving her in the fanfiction. For example, if Hermione made a decision without consulting them, they might feel left out and decide to leave.
One possible plot could be that Hermione's friends start believing false rumors about her. For example, they might think she's been stealing potions ingredients for personal gain when in fact she was framed. As a result, they shun her and exclude her from their group activities. This makes Hermione feel isolated and betrayed, and she has to find a way to clear her name and either regain her friends' trust or find new allies.
She might be initially shocked. After all, she would have trusted her friends a great deal. Then she could become very sad and withdrawn. She might throw herself into her studies even more as a way to cope, trying to distract herself from the pain of losing her friends.