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.
Well, perhaps he used his super powers inappropriately at school. For example, he might have accidentally destroyed some school property while showing off or during a fight with a bully. This kind of destruction would likely lead to expulsion. Also, if he's involved in some sort of cheating scandal using his Saiyan abilities, like getting answers from far away or using super speed to finish exams too quickly, that could be a cause.
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.
Cheating is a common reason. If students are caught cheating on important exams like finals or mid - terms multiple times, the school will likely expel them. It violates the academic integrity of the institution.
In some fanfictions, Harry might be expelled for being wrongly accused of using dark magic. Maybe someone framed him by planting dark magic items in his dorm. Another reason could be that he continuously breaks school rules in a way that the school can't tolerate, like sneaking into the Forbidden Forest too many times without permission.
One possible reason could be that he accidentally causes too much destruction during a mission. Maybe he loses control of his magic and wrecks an important place in the magical world, leading the guild to expel him as a form of punishment.
Drug - related offenses at school are often grounds for expulsion. Whether it's using drugs on campus or being involved in drug trafficking within the school premises. This is because drugs are extremely harmful to the school community. Also, some schools may expel students for engaging in inappropriate sexual behavior that violates the school's code of conduct.
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.
Well, one possibility could be that Mineta's inappropriate behavior finally catches up to him. Maybe he makes one too many lewd comments or actions towards his female classmates, and the school decides it's enough. So he gets expelled.
One possible reason could be that he's wrongly accused of a serious crime, like using dark magic. In the wizarding world, such accusations can lead to expulsion. Another reason might be that he's framed by a powerful enemy who wants to get him out of Hogwarts. For example, a Death Eater could plant false evidence against him.
It could be due to unfair treatment from teachers. For example, if he's blamed for something he didn't do just because he's a Saiyan or has special powers. Teachers might be prejudiced against him, which would lead to his anger. He's a good - hearted person but constantly being misjudged would surely get on his nerves.
One reason could be academic dishonesty like cheating on exams or plagiarizing papers. Another is disciplinary issues such as fighting, bullying, or being disrespectful to teachers.