Newly discovered magical families could rise to prominence. These families might have been in hiding or just not known before, but now they play a crucial role in the wizarding world of 1000 years later. Their members could be the main characters, bringing in fresh perspectives and magical abilities that were previously unheard of.
Perhaps non - human characters like centaurs or house - elves could take on main character roles. They might have fought for equal rights over the centuries and now are integral parts of the wizarding society. Their stories would be very different from human wizards, adding a whole new dimension to the fanfiction.
The main characters are often the children of the original Harry Potter characters. For example, Albus Severus Potter, James Potter, and Lily Potter. Also, Scorpius Malfoy is usually a central character as he is part of the new generation at Hogwarts.
The children of Harry, Ron, and Hermione would likely be main characters. For instance, Harry's son could inherit his father's courage and be at the center of a new mystery. He might have to deal with the high expectations placed on him because of his father's legacy.
Hermione Granger would be a likely main character. She has always been a central figure. Maybe she's working on some revolutionary magical research or is involved in political reforms in the wizarding world. Her relationship with Ron and their family life could also be part of the story.
Obviously, the children of the original characters like James, Albus, and Lily Potter. They are likely to be at the center of many stories as they navigate Hogwarts life. Also, Scorpius Malfoy as he is the son of Draco Malfoy and his story could be intertwined with the Potters.
Most likely the children of the main characters from the original series. Like James, Albus, and Lily Potter. Also, the kids of Ron and Hermione, like Rose and Hugo.
Obviously, Harry Potter would be one of the main characters since he's the one doing the split. Hermione would probably also be involved. She might be the one to research why Harry suddenly has this strange new ability or how to control it.
Hermione might also be a main character. Her intelligence and knowledge of magic would be invaluable in dealing with whatever the weapon in Gringotts is. She could be the one to figure out how to unlock the secrets surrounding the weapon, like deciphering ancient runes or understanding complex magical texts related to it.
Harry Potter himself would likely be a central figure. He has a history of fighting against dark forces and would probably step up to try and maintain order. Hermione would also be important as she is intelligent and could come up with plans to deal with the situation. Ron, with his loyalty and courage, would be by their side.
Hermione could be a major character. She would be really helpful with all her knowledge, maybe helping Harry with the care of the magical creatures and coming up with ways to educate the visitors. Ron might also be there, perhaps handling the more physical tasks around the zoo like building enclosures for the larger creatures.
Obviously, Harry and Hermione are the main characters. They are likely to be older, more mature versions of themselves. Harry, with his Gryffindor courage still intact, and Hermione, with her vast knowledge of magic.