In this fanfiction, the main characters would be those who were at the heart of the fight against Voldemort. So, Harry Potter is a given. Ginny, who is now his wife, and they have children together. Ron and Hermione, as their best friends. But also, Luna Lovegood could be an important character. She has a unique perspective on the wizarding world, and 19 years later, she might be involved in some really interesting things, like exploring new areas of magic or being part of some important social movements in the wizarding world.
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.
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.
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.
The children of the original main characters are often focused on. For example, James, Albus, and Lily Potter. Their experiences at Hogwarts and how they live up to their parents' legacies are common themes.
Obviously, Harry Potter himself is still a main focus. His life 19 years after the end of the original story, how he has matured, and his role in the wizarding world. Ginny Weasley is also important as his wife. Their children may also be central characters in some fanfictions.
The characters could develop by facing challenges that are unique to the thousand - years - ago setting. For example, they might have to deal with more primitive forms of magic and find new ways to use it. They could also develop through interactions with long - forgotten magical creatures.
Obviously, Harry Potter himself would be one of the main characters. And the first - years he's raising, though they might be a group of nameless first - years at first, some of them could emerge as more prominent characters as the story progresses.