Hermione usually reacts in a very Hermione - like way. She doesn't let the bullying break her spirit. She might get angry and frustrated, but she channels that energy into proving the bullies wrong. She might study even harder to show them that she's better than their petty taunts. In some stories, she also tries to educate the bullies about why their behavior is wrong, using her knowledge of magic and ethics.
She often tries to ignore it at first. She's focused on her studies and doesn't want to give the bullies the satisfaction of a reaction.
Hermione may also start to scheme. She'll use her intelligence to come up with a plan. For instance, she might start to collect evidence against Snape, something that she could use to counter his blackmail. She'll research old school rules or find out secrets about Snape that she can hold over his head instead.
She might withdraw. Hermione could become quiet and start spending more time alone, like going to the library even more often than usual. This is her way of protecting herself from further hurt.
She might initially be shocked. Since they are usually friends in the original series, Hermione in fanfiction could be taken aback by Ginny's sudden unkindness.
Hermione would likely react with her characteristic intelligence and courage. She would probably try to use her vast knowledge of magic to find a way to escape or at least resist Fenrir. For example, she might try to use spells that could incapacitate him temporarily. She would also be likely to try and outwit him in conversation, looking for any weaknesses or loopholes in his plans.
Hermione is a strong - willed character. She would likely stand up for herself. She might use her intelligence to counter their mean remarks. For example, if they bully her about her bookish nature, she could come back with facts and logical arguments about the importance of knowledge.
Hermione could also get angry. She's a strong - willed character. So, instead of just accepting the situation quietly, she might confront her friends and demand to know why they are ignoring her. This could lead to a big argument or a revelation about what's really going on.
Hermione often shows great courage in these situations. At first, she might be scared, but she soon overcomes it. She tries to gather information about her kidnappers and their plans. If they are trying to 'adopt' her, she questions their motives and tries to find out what they really want from her. She may use her intelligence to manipulate the situation to her advantage. For instance, she could pretend to go along with their adoption idea while secretly planning her escape. She also tries to stay true to her values. If her kidnappers have a different view on things like the treatment of Muggles, she will not be afraid to speak up and defend her beliefs, even in a captive situation.
She could be conflicted. On one hand, she might be attracted to both in different ways. Sirius's charm and rebellious nature could draw her, while Remus's intelligence and quiet strength might also appeal to her. So she might struggle with her feelings, trying to figure out which, if either, she truly has deeper feelings for.
She usually resists. Hermione is known for her strong will. So in most of these fanfictions, she'll use her intelligence and magic skills to fight back. For example, she might use clever spells to escape or mislead the Death Eaters.
Hermione usually reacts with a mix of anger and determination. She's not the type to be easily pushed around. So, she might start by trying to figure out who the blackmailer is and what their motives are. For example, she could use her intelligence to set traps or follow leads to expose the blackmailer.