Well, Snape would probably be quite irritated by most fanfiction storylines. He doesn't like his image being toyed with, and a lot of fanfiction might portray him in ways he doesn't approve of. He's a very private and proud person, and seeing his character in fictional situations that he didn't create himself would annoy him.
Flitwick, the Charms professor, might be very impressed by the creativity in some of the fanfiction storylines. He loves magic and teaching students new charms. He would be drawn to the fan - created spells and magical concepts in the stories. He might even think about incorporating some of the more interesting ideas into his lessons, if they were appropriate and not too outlandish.
The ghosts of Hogwarts, like Nearly Headless Nick, would likely be entertained. They have a lot of time on their hands and would enjoy reading about new adventures at Hogwarts. They might be especially interested in the ones that involve the ghosts in new and exciting ways, as they are often overlooked in the original books. They could see it as a chance to be more involved in the fictional world of Hogwarts.
I think McGonagall would be very influential. She is strict but fair. She could teach Harry about responsibility and the importance of rules in the wizarding world. Also, her transfiguration skills are top - notch and she could pass on great knowledge in that area to Harry.
Some staff members might be amused. For example, Hagrid would probably chuckle at the creative ideas in the fanfiction. He has a simple and good - natured personality, and he'd find the different takes on Hogwarts and its students quite interesting.
Well, it would be a very different Harry Potter story. Since he's raised by the Hogwarts staff, he might not have the same experiences with the Dursleys. This would probably make him more confident and less of an outcast at first. The staff could train him in magic in a more collective way. For instance, Snape, despite his initial dislike for Harry in the original, might have a different relationship if he was involved in raising Harry. He could teach Harry potions in a more personalized and perhaps less hostile manner as he would see Harry as part of the Hogwarts family from the start.
When it comes to romantic fanfiction, it depends. If it's about his relationship with Ginny, and it's well - written and in line with how he feels, he might be a bit shy but also flattered. But if it's some over - the - top, unrealistic romantic scenario that goes against his true feelings, he could be uncomfortable. For example, if a fanfiction has him falling in love with a Death Eater just for the sake of a 'forbidden love' plot, he would surely object.
Ruby would probably be thrilled to see all the new storylines. She loves adventures and the fanfiction could offer her a whole new set of them.
The Gaang as a whole could have mixed feelings. On one hand, they would appreciate the creativity of the fans who write these fanfictions. On the other hand, they might not like it when their characters are misrepresented. For example, if Zuko is made out to be a completely different person in the fanfiction, they might be a bit offended. But overall, they would probably see it as a new form of storytelling related to their world and might have some fun discussing the different storylines among themselves.
Well, he'd probably be more of a legacy student. He might be treated with even more respect or envy from the start. And he could have a different group of friends. Instead of Ron and Hermione, he might be closer to his brother's old gang, like Sirius and Remus, from the very beginning at Hogwarts.
One interesting storyline could be about the backstories of the Hogwarts staff. For example, a fanfiction might explore Professor McGonagall's early days as a witch, her training, and how she came to be so strict yet fair. Another could focus on Filch and his relationship with the students from a different perspective, perhaps showing a more sympathetic side to him.
Hermione and Ron might not become friends in the same way. Since Harry was the catalyst for their friendship at Hogwarts, without him there, they might not cross paths as easily. Hermione could be more focused on her studies alone in a different school, and Ron might be stuck in his family's shadow without Harry to bring out his better qualities.
One interesting plot could be a story where the Hogwarts staff has to deal with a new, mysterious dark magic that is affecting the students' minds. They have to work together, using their different areas of expertise. For example, Professor McGonagall might use her Transfiguration skills to create barriers, while Snape uses his Potions knowledge to create antidotes. Another plot could be a time - travel story where the staff goes back in time to prevent a major disaster at Hogwarts that was previously unknown. And a third could be a story about the staff's relationships outside of Hogwarts, like how Hagrid might have a secret friendship with a giant community that impacts his role at the school.