Perhaps in the fanfiction, Aizawa gets fired because of a new strict educational policy that doesn't align with his unorthodox teaching style. He then has to find a new way to support himself while still being involved in the hero community in an unofficial capacity. He might start mentoring some of the students secretly, and as they succeed in their hero activities, it draws attention to the fact that his teaching methods were actually beneficial, leading to his possible re - employment.
One possible plot could be that due to some false accusations of improper teaching methods, Aizawa gets fired. His students then band together to prove his innocence. They collect evidence of his effective teaching, like how he has helped them improve their quirks and grow as heroes in training. Eventually, they manage to clear his name and he is reinstated.
It could be a new administrator at the school who has a very different vision of how hero training should be conducted. This person might see Aizawa's methods as too old - fashioned or too lax, even though they are actually effective. So, they push for his dismissal.
Perhaps in the fanfiction, Aizawa gets One For All and decides to keep it a secret. He then starts training in isolation to master it. As he trains, he discovers new aspects of the power that are different from what previous users experienced, due to his own unique quirk and personality. He might use it to secretly protect his students from threats that are beyond the scope of his normal abilities.
Well, it could be that Lloyd made a major mistake in his strategic planning for the Geass-related operations. Maybe he miscalculated something crucial about the enemy's movements or capabilities, which led to a significant setback for his side. And as a result, his superiors decided to fire him.
One possible reason could be his performance at work. Maybe he repeatedly failed to meet his targets or made too many mistakes. For example, if he was in a sales job and couldn't close enough deals, his boss might decide to let him go.
Well, one possible plot could be that Squidward gets fired because he finally snaps at Mr. Krabs over his cheapskate ways. He then has to figure out how to pay his bills and find a new job. Maybe he tries to start his own art business but struggles with marketing it.
He might lose his control over his own quirk for a while. Since his quirk is erasing others' quirks, if he's hit by a strange quirk, it could disrupt his own quirk's function.
Hermione could be a great help. She is very intelligent and resourceful. She could help Harry find evidence against Snape. For instance, if Snape is suspected of cheating in grading, Hermione could use her knowledge of Hogwarts' grading system and records to dig up proof.
Well, it could be about Izuku confronting Aizawa over some misrepresentation in the fanfiction. Maybe Izuku doesn't like how Aizawa is being portrayed as too strict or unfair in the fic.
He could be in shock at first. Just standing there, unable to believe what has happened.
One possible plot could be that cloud is tired of his current job situation. Maybe he has a difficult boss or uninteresting tasks. So, he starts to intentionally make mistakes at work, like coming in late, not meeting deadlines, or being rude to clients in an attempt to get fired.