Some fanfictions might depict Hermione throwing up from stress. In the world of Harry Potter, she often takes on a lot of pressure, like studying for exams, dealing with the threat of Voldemort, etc. A story could focus on how this stress finally gets to her physically and she throws up. You can use search filters on fanfiction websites to narrow down the results.
It could be for the sake of realism. In a magical world full of danger and adventure like Harry Potter's, characters are bound to get sick or have physical reactions. Hermione is a very studious and often overworked character, so it's not far - fetched to imagine her pushing herself too hard and getting ill.
First, other teachers or staff members should help the teacher to a quiet and clean place, like the school infirmary if there is one. This allows the teacher to rest and recover.
Well, in fanfiction, there could be several reasons. It could be that Nico is suffering from some sort of after - effect of a battle. Maybe he was exposed to a harmful spell during combat and now his body is trying to expel the negative energy. Another possibility is that he's feeling homesick for the underworld in a way that his body rebels against the surface world, causing him to feel ill and throw up. Or perhaps he's caught a strange disease that is affecting demigods, and the first symptom is vomiting. And, of course, there could be some sort of emotional turmoil related to his relationship with Will that is so intense it makes him physically sick.
There might not be a whole lot of fanfiction specifically focused on 'Nico throws up' within the Solangelo context. However, if you dig deeper into the Solangelo tag on fanfiction sites, you may find some stories where Nico experiences some sort of distress that could potentially lead to such a situation. For example, a story where he's been poisoned or is extremely ill due to some magical affliction. But it's really going to take some time to sift through the available works.
Schools should have a proper protocol. First, they should immediately isolate the area where the student has thrown up to prevent the spread of germs. Then, a staff member should help the student to the nurse's office or a quiet, clean place to rest.
After he throws up, he might discover a new clue. For example, the vomit could have some strange color or texture that indicates what kind of poison or magic is affecting him. Then he could start looking for a cure.
One of the most dramatic scenes could be when he throws up in the middle of a battle. Imagine he's facing a horde of monsters, and suddenly he starts to feel sick. He's trying to hold it in while fighting, but eventually he can't and it throws off the rhythm of the battle, both for him and his allies. It adds a sense of vulnerability to the usually strong Percy.
Sure does! The manga of Bocchi the Rock expands on the world and characters. It gives fans more depth and background information that might not be fully covered in the anime.