It could be due to a strenuous magical duel. She might have been engaged in a difficult battle against a powerful dark wizard, and the intense concentration and physical exertion of casting spells made her break out in a sweat.
Another possibility is that she was in a situation where she had to perform a complex and time - sensitive magical ritual. The mental and physical strain of getting all the incantations and movements right within a short time frame caused her to sweat profusely.
It could also be a sign of her determination. She might be pushing herself to the limit to achieve a certain goal. For example, if she is trying to break into a magically protected place to retrieve an important object, the sweat shows how hard she is working towards that goal. In a more detailed sense, her drenched state could also be a way for the author to show her vulnerability. Even though Hermione is a very intelligent and powerful witch, she is still human (well, a witch but you get the idea). The sweat makes her more relatable and shows that she can be affected by the difficult situations she is put in. It adds depth to her character in the fanfiction.
In the second season of the celebration, Fan Xian showed a scene of sweat dripping down his back. In the play, Fan Xian cleverly captured the opponent's logical flaws and used sharp words to make the opponent unable to refute, making the opponent sweat profusely. This battle of wits displayed Fan Xian's intelligence and eloquence, giving the audience a wonderful performance.
It could stand for so many things. It might be an abbreviation for a group name, like 'Gryffindor Prefects' if it's related to the Harry Potter universe. Or it could be some made - up concept or term specific to the author of that fanfiction.
It could also be a form of magical restraint. In some fanfictions, there are new and powerful dark spells that require the victim to be tied up physically as well as magically bound. Hermione, being a Muggle - born and a very powerful witch, might be targeted by those who want to use her magic for their own evil purposes. So they tie her up to subdue her and try to break her will to resist their magic - stealing attempts.
One possible reason could be Snape's unfair treatment of Gryffindor students in the fanfiction. Hermione, being a strong advocate for justice and fairness, might not be able to tolerate his constant bias against her house. For example, if Snape gives Gryffindor students harsher punishments than students from other houses for the same infractions, Hermione would likely be furious and yell at him.
Well, one plot twist could be that Hermione's werewolf nature is kept hidden until a crucial moment in the story. Maybe she has been using magic to suppress it all along, but then during a full moon at Hogwarts, she loses control and reveals her true self. This would shock her friends like Harry and Ron, and they would have to figure out how to deal with it while also keeping it a secret from the rest of the school.
One possible root cause could be the extreme pressure she puts on herself academically. Hermione is known for her pursuit of knowledge and high grades. If she starts to feel like she can never meet her own impossibly high standards, it could lead to a sense of hopelessness and suicidal thoughts.
Perhaps Snape was being overly harsh with one of Hermione's friends. She is very protective of Harry and Ron. If Snape said something mean or did something to harm them, Hermione would surely stand up and yell at him. For example, if he gave Ron a particularly difficult detention for no real fault of his own.
I'm not sure which specific 'gp' in this context means. But some popular fanfiction platforms like Fanfiction.net or Archive of Our Own might have Hermione - related fanfictions. You could try searching for 'Hermione' and relevant keywords on those sites.
One possible plotline could be a rescue scenario. Maybe her friends discover she's in this state and they have to outwit the captors. For example, Harry could use his invisibility cloak to get close and free her.