Harry Potter might be a bit surprised. He'd probably think it's strange that people are writing about his friends' and his own relationships in such a different way. Hermione would likely be very interested in the writing style and how the authors are creating these new relationships. She might even take notes to improve her own writing. Ron would just laugh it off most of the time. He'd find it a bit odd but also funny.
Luna would be one of the most enthusiastic about ships fanfiction. She'd love the creativity and the new worlds that the fanfiction writers are creating. She might even start writing her own ships fanfiction based on the ones she's read. Professor Snape would be horrified. He'd think it's a waste of time and completely inappropriate. He'd probably give a long lecture about how people should focus on real wizarding knowledge rather than fictional relationships.
Luna would be very open - minded. She might see the fanfiction as just another form of magical thinking. She could find the wild and imaginative ideas in the fanfictions quite endearing and might even start to incorporate some of the concepts into her own unique view of the wizarding world.
Hermione would probably be devastated. She was Harry's closest friend and ally. She might be filled with rage towards Vernon and vow to seek justice. Ron would also be heartbroken and might want to take matters into his own hands against Vernon.
Hermione would probably be shocked and confused. She would try to find a logical explanation through research. Ron might be disgusted at first, as he has a traditional view of relationships. Dumbledore, being the wise and understanding figure, would likely try to see the bigger picture and find a way to protect Harry from the potential fallout. The Malfoy family would be in a state of chaos, with Narcissa having mixed feelings about the situation.
Well, he might be really confused at first. Supernatural has all these different monsters and a very different magic system compared to his world. He'd probably be intrigued by the way the Winchester brothers deal with things though.
The Avengers would likely have a range of reactions. Natasha Romanoff might be intrigued in a way, seeing how fans perceive different relationships within the team. She could use it as a form of psychological study, like 'This shows how people view our dynamics.' Hulk might not care much at all, just grunt and go about his business. Hawkeye might make some sarcastic comments like 'Well, at least they're creative with our lives in these stories.'
Some characters might be quite amused. For example, Hermione would probably analyze the fanfiction from a logical perspective, critiquing the plotlines that involve ships. Ron, on the other hand, might be a bit bewildered at first but then find it rather entertaining. Harry himself could be either indifferent or intrigued, depending on how the ships are portrayed. If it's a ship that he has a personal connection to, like his parents, he might be more interested in seeing how the author has envisioned their relationship in the fanfiction world.
For the teachers in My Hero Academia, like Aizawa, he would probably be indifferent to most ships fanfiction. But if there were ships that involved his students in inappropriate or unethical ways in the fanfiction, he would be very concerned. Otherwise, he would just see it as another strange aspect of the fans' creativity and leave it at that.
One popular ship is Harry and Hermione. Many fans like the idea of their close friendship evolving into something more in fanfiction. They have great chemistry in the books and movies, and it's interesting to explore their relationship further in different fictional scenarios.
Hermione would probably be shocked at first. But then she would try to find a way to help Harry through it, using her vast knowledge of magic to figure out what's going on.
Some characters might be amused. For example, Ron would probably find the wilder and more comical fanfictions really funny. He'd be laughing out loud at the absurd scenarios where he's made into a heroic food - loving wizard who saves the day with a well - timed puking pastille.