Well, it could be really strange for him. He might find some of the interpretations of his life and adventures quite off - putting or amusing. Maybe he'd be shocked to see how some fans have romanticized his relationships in ways he never thought of.
If Voldemort reads Harry Potter books fanfiction, it could be really strange. He might get angry as the fanfiction could portray him in ways he doesn't like. Maybe he'd see himself being defeated in new and creative ways that would irritate his pride. He could also gain some new, unexpected insights about the wizarding world from the different perspectives in the fanfiction, which could either make him more dangerous or, if he overthinks it, cause him some confusion.
Well, it could be really interesting. Harry might find the different universe of Star Wars fascinating. He could compare the magic in his world to the Force in Star Wars. Maybe he'd be inspired by the epic space battles and different species, and it could give him new ideas for dealing with his own adventures in Hogwarts.
If Merlin reads Harry Potter fanfiction, he might start comparing the two magical universes. For example, the way magic is taught at Hogwarts versus how he might have learned magic in Camelot. He could also be interested in the various magical creatures in the Harry Potter world that are different from those he knows. Maybe he would be inspired to create new spells or magical techniques based on what he reads in the fanfiction.
He might feel a bit embarrassed. After all, these are often people's wild imaginings about his personal life.
He might be quite amused. Fanfics often contain different interpretations of the characters and the wizarding world. He could find some creative ideas in them that he never thought of before, like unique magical spells or new backstories for his friends.
He might be quite amused. He could find it interesting to see how others imagine the world he was a part of. Maybe he'd be a bit shocked at some of the wild interpretations, but overall, it would be a unique experience for him to see his story through different lenses.
If Harry killed dementors in a fanfiction, it could have several implications. For one, it could be a sign of his growth and mastery of magic beyond what was shown in the books. It might also lead to a different relationship between him and the Ministry of Magic. Since dementors were used as guards in Azkaban, their deaths could cause chaos in the prison system. Additionally, it could change the perception of the dark side in the wizarding world, as dementors are a symbol of the darkest elements.
If Harry Potter reads the Hobbit fanfiction, he might be a bit confused at first. After all, the rules of magic and the types of creatures are different. But then he could start to see similarities. For example, both worlds have their own forms of quests. He might also enjoy reading about Bilbo's courage and compare it to his own experiences facing Voldemort.
She would probably be outraged. Umbridge is a strict and conservative character in the original series. Fanfiction often contains ideas that deviate from the 'canon' she adheres to, and she might see it as a threat to the 'proper' understanding of the wizarding world she believes in.
He'd probably have a mixed reaction. On one hand, he'd be curious. The stories in manga fanfiction can be so out - there and exciting. He might enjoy the action - packed plots or the emotional character arcs. On the other hand, he might find some of it a bit too strange. The different cultural backgrounds that influence manga might make it hard for him to fully understand some of the concepts. But overall, it would be an eye - opening experience for him.