At first, Hermione would be devastated. She has always been loyal to the Order and their cause, so the betrayal would come as a huge blow. She might start to question everything she thought she knew about the Order and the people in it. However, she wouldn't stay down for long. Given her resourcefulness, she would begin to gather evidence to prove her innocence. She could also reach out to other friends or allies outside of the Order, like Harry or Ron, for support. And she would be determined to make the Order realize their mistake and regain her place among them if possible.
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.
She might become extremely angry and cut off all ties with Draco immediately. Hermione is a strong - willed character, so she would not tolerate betrayal easily. She could use her magic to create some sort of barrier between them, magically locking him out of her life.
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.
She might be angry at first. She has always been loyal to the Order's cause, and this abandonment would be a huge blow to her.
At first, Harry would probably be in shock. He has always considered Hermione one of his closest friends, so her betrayal would be a huge blow. He might not believe it at first and try to reason with her.
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.
He might be extremely angry and feel a deep sense of hurt. After all he has done for Poseidon and the gods, being betrayed would shatter his trust. He could go into a period of self - exile, distancing himself from the demigod world and trying to find his own path without the help of his father.
Naruto might initially be in shock. He's a very loyal person, so he wouldn't expect such a betrayal. He could try to talk to her to understand why she did it. For example, he might say something like 'Why? I thought we were in this together.'
Well, initially Percy would be confused. He would try to understand why someone he trusted would turn on him. Depending on the severity of the betrayal, he might isolate himself for a while, thinking that he can't trust anyone. But as he is Percy, he would also start to look for a way to clear his name and prove his innocence. He would use his wits and his skills to figure out what really happened and expose the truth. He may also have some internal struggle about whether to forgive the betrayer if the situation allows for it.
At first, Naruto is often shocked. He can't believe that the village he has always loved and fought for would turn against him. Then, he might feel a deep sense of sadness. In some fanfictions, he tries to reason with those who betrayed him, asking them why they did it.
Ash could respond in different ways. He might try to confront his friends immediately to get an explanation. If the betrayal is really bad, he could cut them off completely and focus on his own goals, like becoming a better Pokémon trainer. He would also probably have some internal struggles, as he has memories and experiences with these friends that he can't just forget.