Well, perhaps Harry Dresden could introduce his unique brand of magic from his own world into Hogwarts. He might teach the students new ways of dealing with magical creatures that are different from the traditional Hogwarts methods.
I think younger readers who are fans of the Harry Potter series and are looking for something a bit different would be interested. They might be intrigued by the idea of a new character, Harry Dresden, coming in and shaking things up at Hogwarts. And for those who like to explore different interpretations of magical worlds, this fanfiction would be right up their alley.
Perhaps the story could revolve around them facing challenges within the Hogwarts faculty. There could be some old - fashioned professors who oppose their modern teaching methods. Harry and Hermione then have to prove that their ways are beneficial for the students. They might also discover new magical abilities in some of the students that were previously overlooked, and help those students develop their skills.
Perhaps Harry is teaching Potions in the fanfiction. Since he had a bit of a rocky start with Potions in his student days, he could be a very understanding teacher. He might encourage students to experiment more, which is different from Snape's strict methods. He could also share stories about how important Potions were in his adventures, like when they made Polyjuice Potion. This would make the class more interesting and inspire students to take Potions more seriously.
Hermione would surely be a main character. She could be a fellow teacher, perhaps teaching Transfiguration or History of Magic. She would be the one Harry goes to for advice on teaching methods or when he has a difficult student. Another character could be Ron. He might visit Harry at Hogwarts and end up getting involved in some of the school's mysteries or helping Harry with a particularly difficult Quidditch - loving student.
One spell she could teach is a charm for protecting books from any kind of damage. Given Hermione's love for books, this would be a great addition to the curriculum. Also, a spell for magically highlighting important parts of textbooks as you read them would be very useful. This spell could be activated by just thinking about the relevant information while reading.
Well, perhaps Percy could be teaching a new and difficult subject like Ancient Runes. He might use his strict and studious nature to get the students to really focus on the complex rune translations.
One possibility is that Merlin brings his ancient magic knowledge. He might introduce spells and magical concepts long forgotten in the Hogwarts curriculum. For example, he could teach students about pre - Hogwarts era potion - making techniques that are more in tune with nature.
If Edward Elric taught at Hogwarts, it would be a wild ride. He's used to a different magical system in his own world. He could bring in concepts like equivalent exchange to the Hogwarts curriculum. His experience with his own dark and dangerous adventures would give his teaching a sense of urgency and real - world applicability that Hogwarts students might not be used to. He might have some clashes with the more traditional Hogwarts professors at first, but eventually, they'd see the value in his different perspective.
Well, it would be quite an interesting scenario. Percy Jackson is a demigod with his own set of skills and experiences. Teaching Defense Against the Dark Arts at Hogwarts would mean he'd bring a whole new perspective. He could teach students how to fight off monsters using his sword - Riptide, which is a very different approach from the usual spells taught at Hogwarts. His knowledge of Greek mythology might also come in handy when dealing with dark creatures that have their roots in ancient myths.