Eventually, the class might come to understand Marinette's decision. As they struggle to do things on their own, they realize how much effort Marinette had been putting in. This could lead to them changing their ways and maybe even trying to make it up to Marinette if she decides to start helping again.
It could be that she has her own personal issues or problems to deal with. For example, she might be facing some family troubles or she is focusing on her own studies or personal growth. Helping the class has been taking up too much of her time and energy, so she decides to stop.
Well, some might be really amazed. They could see a new side of Deku that they never knew before. His singing might show a different level of confidence or a hidden talent, so they would probably cheer him on.
They might be really surprised. Some characters could be flattered by the positive portrayals in the fanfiction, while others might be a bit annoyed if their personalities are misrepresented. For example, Deku might be shy but also happy to see new interpretations of his growth journey.
Marinette would likely be very frightened at first. She might scream or try to fight back. After all, being kidnapped is a terrifying situation.
Another reaction could be that Marinette pretends to cooperate with Adrien at first. By doing this, she can buy time and look for an opportunity to escape or get help. She might act as if she is okay with what is happening while secretly planning her next move, like leaving a clue for someone to find her or finding a way to disable Adrien temporarily.
Bakugou might react with his usual anger. He could lash out at the bullies verbally or even physically, which might make the situation worse. For example, if someone makes a snide comment, he could respond with a loud and aggressive retort.
He might be initially shocked. Snape is used to students being intimidated by him, so Hermione's outburst could catch him off - guard. He may glare at her silently for a moment, trying to regain his composure.
They might be really excited, especially if the fanfiction contains interesting new storylines or character developments that they haven't thought of before.
Peter would probably be shocked at first. I mean, getting a call from Deadpool in the middle of class is not an everyday occurrence. He might quickly look around to see if anyone noticed his phone ringing.
Some students in Peter's class might be really excited as they get to see new takes on their favorite movie. Others could be a bit confused if the fanfiction is very different from the original story.