Neville Longbottom can also be a significant character in these fanfictions. He has grown a lot in his magical abilities by the end of the original series. So, he could be learning battle magic alongside Harry, or even teaching Harry some unique plant - based battle magic that he has discovered through his work with magical plants.
In addition to the Golden Trio, some fanfictions might introduce new characters. For example, an old and wise wizard who has been living in seclusion and decides to mentor Harry in battle magic. There could also be characters from other magical schools who come to Hogwarts and share their knowledge of battle magic with Harry.
Often, Harry Potter himself is still a central character. He might be exploring the new aspects of projection magic. Hermione could also be involved as she is always eager to learn and experiment with new magic. Ron could be there too, maybe being a bit skeptical at first but then getting caught up in the excitement.
Severus Snape is a popular character in Harry Potter magic altering fanfiction. His complex character and his deep knowledge of magic, especially dark magic, make him a prime candidate for exploring how magic alterations would affect him and the overall wizarding world. Also, Dumbledore, with his vast wisdom and power, is often involved as he tries to guide the wizarding world through the changes in magic.
Obviously, Harry Potter himself is always a main character. He is the one most directly associated with the concept of death in the original series, what with his parents' death and his multiple near - death experiences.
Ron Weasley could be another main character. He might be initially skeptical about the piano's magic but then be amazed when he sees the extraordinary things it can do. Maybe he accidentally discovers a new function of the piano while fooling around with it in the Gryffindor common room.
Harry Potter himself could be one of the main characters in such fanfiction. Maybe he gets an automail limb after a particularly dangerous encounter with Voldemort. Hermione might also be involved, using her vast knowledge to help understand and improve the automail technology within the wizarding context.
Well, of course, Harry Potter himself is often the central figure. He's usually the one who discovers the amulet or is tasked with dealing with its powers or secrets. Hermione Granger also frequently appears, using her vast knowledge to help Harry understand the amulet.
Harry Potter himself is often involved. He might be the one to discover a mysterious egg or be tasked with protecting it. Hermione Granger could also be a main character, using her vast knowledge to figure out the nature of the eggs. Ron Weasley might be there too, providing some comical relief while also helping with the situation.
In some fanfictions, characters like Neville Longbottom could emerge as key figures in emancipation. After his growth and development in the original series, he could use his new - found confidence and skills to fight for the rights of those who are oppressed, whether they are house - elves, werewolves or Muggle - borns.
Typically, you'll see the main trio - Harry, Hermione, and Ron. But other characters can be involved too. Neville Longbottom could be there, using the gym as a place to gain confidence and physical strength. Ginny Weasley might also be a main character in such fanfiction, showing off her athletic skills and competing with the boys. And of course, some fanfictions might include Draco Malfoy, either as a rival in the gym or someone who surprisingly teams up with the others for a common fitness goal.
The Weasley family sometimes takes center stage in these fanfictions. Given their relatively poor status in the original series, it's interesting to see how they might be affected by sudden wealth. For example, Fred and George could use new - found wealth to expand their joke shop business even further, or the family as a whole could use it to upgrade the Burrow.