The teachers would also be affected. Aizawa, for example, might feel like he failed as a teacher. He might question his teaching methods and his ability to handle difficult students. The school as a whole might face some negative publicity, and other students could be in a state of shock or unease. They might worry that if Bakugou can be expelled, they could be next if they make a single mistake.
For Kirishima, who is friends with Bakugou, it would be a big blow. He might feel responsible for not being able to control Bakugou's temper or actions. He could become more withdrawn and less confident in his own abilities as he struggles with the loss of his friend from school. Also, he might try to find ways to get Bakugou reinstated.
His expulsion would have a huge impact on Midoriya. Since they have a long - standing rivalry, Midoriya might feel a sense of guilt, as if he could have done something to prevent Bakugou from getting expelled. He might also be more determined than ever to prove himself, now that his main rival is no longer in the school environment.
His relationship with Naruto would become more complicated. Naruto might be torn between believing in Sasuke's innocence and following the village's decision. Sakura would be deeply affected too. She might be in disbelief and try to find a way to get Sasuke reinstated.
Midoriya is often a common character. Since he has a complex relationship with Bakugou, his reaction to Bakugou's expulsion can be an important part of the story. All Might might also be included as he could be a mentor figure who tries to guide Bakugou, even after his expulsion. And Bakugou's other classmates like Kirishima would likely be there too, as they are his friends and would be affected by his leaving.
His relationship with Lucy would be greatly affected. She might be one of the first to try and clear his name or convince the guild to take him back. Their friendship would face a huge test as she has to balance her loyalty to the guild and her belief in Natsu.
With Lucy, it could bring them closer in a way. Lucy might feel sorry for Natsu and try to help him get back into the academy. This shared goal could strengthen their bond as friends. She could also offer her place for Natsu to stay while he figures things out.
For Harry Potter, it could be a mix of emotions. On one hand, he might be relieved as Snape has been tough on him. But on the other hand, he might also feel a bit guilty or confused, especially if he later discovers that Snape was wrongly fired. Hermione would probably be outraged at the injustice of it all and might try to find evidence to get Snape reinstated.
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.
His friends would be devastated. Hermione, for example, would probably try everything she could to clear his name. She might search through every book in the library to find a loophole or evidence to prove Harry's innocence.
Perhaps Bakugou gets expelled due to his attitude problems. He might have continuously bullied a fellow student to the point where the school can't overlook it anymore. His explosive temper could lead to him saying or doing something really offensive to a teacher or a large number of students, which would be against the school's code of conduct.
If Tai gets hurt, it can have a big impact on the group dynamic. The other characters may become more cautious in their actions, fearing that the same could happen to them. Some might become overprotective of Tai during his recovery. His injury could also bring out different sides of the other characters. For example, a normally timid character might become more assertive in finding a way to help Tai get better. And his friends would be more united in their determination to get him back to full health, which could strengthen their bonds.
It could completely change the dynamic. Their friends would have to deal with their absence, which might lead to some characters going on personal quests to get them back.