In some fan fictions, the teachers at Hogwarts play a big role in how he is received. If a teacher has a premonition about Harry Riddle's potential for good or bad, they could influence the other students' opinions. For example, if a respected teacher like Dumbledore vouches for him, he may be more readily accepted. But if a teacher is wary of him, it could make his time at Hogwarts difficult.
The Hogwarts community's reaction to Harry Riddle's arrival can also depend on the political climate within the wizarding world in the fan fiction. If there is fear of a new dark threat emerging, Harry Riddle might be seen as a potential source of that danger. However, if the wizarding world is in a more stable and inclusive state, he may be welcomed with open arms as just another student with an interesting name and background.
He could be either welcomed or shunned. If the fan fiction takes a different turn, the Hogwarts students might be suspicious of him because of his name. They may think he has some connection to the dark wizard Voldemort. On the other hand, some might be intrigued by his unique background and want to get to know him better.
Often in such fan fictions, Harry Riddle's arrival at Hogwarts is a turning point. He might be targeted by a secret society within the school that has its own agenda. His magical abilities could be tested in ways that are far more extreme than in the original story. For instance, he may be forced to compete in a dangerous magical tournament organized by a group of rogue students. This would put his life at risk but also give him the opportunity to prove his worth and grow as a wizard.
Well, if Harry arrives at Hogwarts as a Snape fan, he might be more eager to get into Potions class. He could be constantly trying to impress Snape. Maybe he'd defend Snape more often against the other students' taunts. He might also study Snape's research and be more interested in the Dark Arts from Snape's perspective, which could lead him down a different path in his magical education.
They could be greeted with great enthusiasm. The students might look up to them as heroes and be excited to have them back.
When muggles visit Hogwarts in fanfiction, their reception can vary greatly. There could be a few friendly students or teachers who are excited to show them around and introduce them to the magic world. However, there will also be those who are more reserved and worried about the implications. The Headmaster or Headmistress usually has to make the final call on how to handle the muggles. They might have special areas set up for the muggles to stay and observe, away from the more dangerous or secretive parts of the school.
Most likely very negatively. The Harry Potter fan community values the positive aspects of the series. They would see this fanfic as a disrespect to the original work and its characters.
Some fans might be disappointed. They may have put a lot of effort into creating their fanfiction about Hogwarts, and rejection can be disheartening. It could also lead to a decrease in the number of new fanfictions being created as people may be afraid of rejection.
The fan community's reaction could be quite diverse. Some fans might be very empathetic towards Harry's character and support the author for exploring such a complex issue. Others may be critical, feeling that it goes against the typical mood of a romance fan fiction.
It would likely be a very controversial topic. Many fans who are strict adherents to the original story and its characters' relationships might be appalled. The age difference between Harry and Narcissa, as well as their different positions in the wizarding world, would be major points of contention.
In some fanfictions, he might be received with suspicion. Some wizards might think he has come back to disrupt the peace or gain more power. But his true friends would stand by him and prove his good intentions.
Most fanfictions in the Twilight universe are centered around the existing relationships and the development of the characters in a more positive way. The idea of Bella being raped by the Volturi is not only immoral but also doesn't fit with the overall tone of the books and movies. The Twilight fandom usually values the romantic and fantastical elements, not this kind of violent and unethical content. If such a fanfiction exists, it should not be promoted or given any form of positive attention.