He may see it as an opportunity. Maybe he'll think that he can now focus more on his training or on helping to protect the world without the restrictions of school. He could start to explore his Saiyan powers more freely and look for ways to use them for good outside of the school environment.
He might be angry at first. After all, he may feel that the school doesn't understand him or his situation. He could be thinking that his actions were justified in some way.
Trunks could also be a bit sad. He might have friends at school that he'll miss. And he may realize that being expelled is going to make things difficult for him in the future, like getting into another school or having a normal life among humans.
One possible reason could be getting into too many fights. If Trunks is constantly using his Saiyan strength to defend himself or others in a violent way, the school might expel him. Another reason could be skipping classes. Maybe he's off on some adventure or training instead of attending school.
A 'trunks gets grounded fanfiction' might explore various aspects. It could be about Trunks, a character from a particular series, getting punished by being grounded. This could lead to different scenarios such as how he copes with the restrictions, his relationships with other characters during this time, and his internal thoughts and growth. Maybe it shows his struggle between his normal adventurous self and the confined situation he's in now.
Gohan would likely be extremely shocked and angry. He is Pan's father and would have a hard time accepting this situation. Vegeta might be disappointed in Trunks, as it goes against Saiyan propriety. Bulma would probably be worried about the implications for the family and how to handle the situation. Goten might be confused and not know how to react, as it involves his nephew and niece in a very unexpected way.
Jaune could also become angry and frustrated. He might feel that the system is unfair and that he's being wrongly punished. So he could lash out at those he believes are responsible for his expulsion, whether it's a fellow student who set him up or a teacher who didn't give him a fair hearing. In some cases, he may even try to expose the wrongdoings or secrets of the school as revenge for his expulsion.
He might be extremely angry and feel a great sense of injustice. He has always seen Hogwarts as his true home, and being expelled would be like losing his family. So he would probably fight back, trying to prove his innocence and get his expulsion reversed.
The most interesting part could be Trunks' attempts to break the rules of his grounding in a clever way. He might use his unique skills or intelligence to find loopholes.
A common theme is protecting loved ones. When Trunks sees his family or friends in harm's way, he gets mad and is driven to take action. Another could be revenge. If someone wrongs him or his loved ones, his anger fuels his desire for revenge in the fanfiction.
Most of their friends would be very supportive. However, there might be a few who are jealous. Some might be envious of the love they share. But overall, their friends would throw a huge celebration. Bulma would use all her resources to make the wedding a grand affair. And the Z - Fighters would put aside their training for a while to celebrate with them. There would be a lot of laughter, stories shared, and of course, some friendly sparring during the pre - wedding celebrations.
One possible plotline could be Bakugou's journey to redeem himself after the expulsion. He might have to face his own flaws and work hard to prove that he can change. Another could be how his friends react to his expulsion, some might be shocked while others might try to help him get back in. Maybe there's a plotline where he discovers a new power or ability during his time away from school that makes him even stronger when he eventually returns.
One interesting 'izuku gets expelled' fanfiction could be where he gets expelled due to false accusations of cheating. In this story, villains frame him to get rid of a potential threat. Another might be a story where his quirk goes out of control during a test and the school, in a panic, expels him. There could also be a fanfic where a jealous classmate sets him up to look bad and get expelled.