Harry would probably be very confused at first. He knows Hermione is usually a rule - follower, so her wanting to be punished would seem out of the ordinary. He might try to talk her out of it, thinking there must be some misunderstanding. Ron, on the other hand, would be more straightforward. He'd likely say something like 'Hermione, you're mad!' and try to convince her that she doesn't deserve any punishment. The teachers, such as Professor McGonagall, would be taken aback as well. She would probably question Hermione carefully to understand her motives before deciding on any action.
In this kind of fanfic, Neville would be quite shocked. He's used to Hermione being the one who helps him stay out of trouble, not the one seeking it. He might stutter out some words of disbelief. Luna Lovegood might have a more unique perspective. She could say that Hermione is on a journey of self - discovery through this act of seeking punishment. The ghosts in Hogwarts, like Nearly Headless Nick, would probably be curious and gossip about it among themselves. And the Hufflepuff students might be generally more sympathetic, thinking that Hermione must have a really good reason for wanting to be punished and would offer their support in a more quiet and kind way.
Well, the other Gryffindor students would have mixed reactions. Some of the more rule - abiding students might admire Hermione's sense of justice in wanting to take responsibility for her actions. But others might think she's just being overly dramatic. Draco Malfoy would surely seize the opportunity to mock her. He'd say something cruel like 'Look at the know - it - all finally getting what she deserves.' However, the teachers like Dumbledore would look deeper. He would see it as an opportunity for Hermione to grow and might guide her through a more philosophical exploration of right and wrong rather than just a simple punishment.
Harry would be extremely shocked. He has always seen Snape as a complex figure, and Hermione capturing him would make him question a lot of things. He would likely try to get to the bottom of it and mediate between Hermione and Snape if possible.
Ron would probably be shocked. He always looks up to Hermione as the one who follows the rules. He might try to defend her at first, but then realize she was in the wrong. Harry, on the other hand, would be more understanding. He knows that sometimes there are more important things than just following the rules blindly.
One possible scenario could be that Hermione breaks a very important school rule in a creative way. For example, she might use a forbidden spell to save a friend in a dangerous situation but knows she has to face the consequences. Another could be that she feels guilty for not helping a classmate enough in a group project and wants to be punished as a form of self - flagellation. Or perhaps she accidentally damages a valuable magical artifact and willingly submits to punishment as a matter of principle.
Well, the other students in Gryffindor would likely be a bit taken aback at first. But then, knowing Hermione's intelligence and her tendency to be different, they would probably accept it. They might be curious about how she's going to manage to keep up the charade. The Hufflepuffs would be generally kind and understanding, perhaps even offering to help her if she needs it. The Ravenclaws would be intrigued by the idea and might study her transformation from a more academic perspective. The Slytherins, as a whole, would be more likely to try and use her disguise against her, either by blackmailing her or trying to expose her in a way that would cause her and her friends embarrassment.
Hinata would probably be very shocked at first. Since she has feelings for Naruto as well, she might feel a bit betrayed but also happy for her sister. She would be in a very conflicted state.
Harry would be extremely protective. He'd probably be the first to jump in and try to shield Hermione from any harm or unwanted attention. Ron, on the other hand, would be a bit more flustered at first but would quickly get his act together and use his loyalty to support Hermione.
She might be very disappointed in herself. Hermione is usually a rule - abiding student, so getting punished by Dumbledore would likely make her feel that she let him down.
Harry would probably be very surprised and a bit concerned. He's always been protective of Hermione, and this sudden turn of events with Draco would make him wonder what's going on. Ron would likely be more openly shocked and perhaps a bit jealous. He has had his own complicated feelings for Hermione over the years.
Harry would probably be very suspicious. He has always seen Draco as a bit of a bully and an enemy. He might think that Draco is up to something and try to warn Hermione to be careful. Ron, being more hot - tempered, could be quite angry. He might not understand how Hermione could even be in a situation where Draco kisses her. He might even lash out at Draco without really thinking about it. Ginny, on the other hand, might be more open - minded. She could see that there might be more to the situation than meets the eye and encourage Hermione to figure out her feelings before making any rash decisions.
The other characters' reactions could vary widely. His close friends in the fanfic might be in a state of panic, crying and not knowing what to do. Enemies, on the other hand, might see it as an opportunity to take advantage, or they could also be secretly worried depending on the complexity of their relationships. And there could be those characters who are just bystanders, shocked at first and then trying to figure out what happened.