She might initially be in shock. Hermione is used to relying on her friends, so the betrayal would be a huge blow. She could then become angry and start to isolate herself. In some fanfictions, she might try to figure out why they did it on her own, using her intelligence to uncover the truth.
In many fanfictions, Hermione's reaction is complex. At first, she may try to reason with her friends, hoping it's all a misunderstanding. But when she realizes it's not, she can become quite vengeful. She might use her knowledge of magic to expose their wrongdoings or to get back at them in some way. However, she also has a kind heart, so she could eventually forgive them if they show genuine remorse, but not without making them earn it.
Often, Hermione reacts with a mix of hurt and determination. She's a strong character. So, instead of crumbling, she might use the betrayal as motivation to prove herself even more. She could start to focus more on her studies and her own magical growth, distancing herself from her former friends. And she might also look for new allies who she can trust more.
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.
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.
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.
Harry would probably be very concerned and protective. He's been through a lot himself, and he'd want to be there for Hermione. He might try to comfort her by just sitting with her quietly, sharing his own experiences of tough times to let her know she's not alone.
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 Then she could become very sad and withdrawn.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.
After the initial reactions, Hermione may choose to isolate herself for a while to figure things out. She would use this time to study and research, trying to find a solution to the problem with her friends. She might also look for new allies or resources within the fanfiction world to help her deal with the situation.
She might be initially shocked and hurt. Hermione is a character who values her friendships deeply, so their sudden departure would be a big blow. She could spend some time in denial, not believing that they would actually leave her.
She would probably be very hurt and angry. Hermione is a strong - willed character, so she might immediately start trying to find out the truth and clear her name.
Hermione could react by using her intelligence to expose Fleur's betrayal. She might start gathering evidence of what Fleur has done wrong and present it to their mutual friends or to an authority figure in the wizarding world.
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.