Obviously, Harry Potter himself is a central character. His wife, whether it's Ginny or in some alternate scenarios someone else, would also be very important. Then there are his friends like Ron and Hermione. They would likely be the baby's godparents or play important roles in the baby's life. Dumbledore, even though he's passed away, might still have an influence through his wisdom left behind. And of course, there could be new characters created specifically for the fanfic, such as a nanny or a tutor for the baby with some unique magical skills.
Harry's family members would be in the picture. His in - laws, like Ginny's family. Neville could also be a part of the story, maybe as a teacher at Hogwarts when the baby grows up. The Malfoys could be an interesting addition too. They might have a change of heart and be curious about Harry's baby. The baby's own peers as it grows up, other children in the wizarding world, would be potential characters. There could be rivalries or friendships formed right from a young age. And there are always the magical creatures, like Hedwig's descendants, which could have a special connection to the baby.
Obviously, Harry and Ginny would be main characters as the baby's parents. Their friends like Ron and Hermione would also play important roles. Ron could be the fun - loving uncle figure, always making the baby laugh with his silly jokes. Hermione would be the knowledgeable aunt, perhaps helping with the baby's magical education as it grows up.
A new young teacher at Hogwarts. She could be a prodigy in Transfiguration, having mastered some really advanced spells at a young age. She brings a fresh perspective to teaching and has a bit of a rivalry with McGonagall in the fanfic. She might also have a mysterious past that is gradually revealed throughout the story.
Obviously, Madam Pomfrey is a key character as she runs the hospital wing. Harry, Ron, and Hermione could also be characters, perhaps they visit a friend who is ill. There could also be some minor characters like Neville who might get injured during a Herbology class and end up in the hospital wing.
Obviously, Harry Potter himself. Then there could be some Canadian - born witches and wizards as his friends. Maybe a tough - as - nails girl from the Yukon who is an expert at ice magic. And a laid - back boy from Vancouver who has a special talent for communicating with magical forest animals.
Obviously, Harry Potter himself. There could also be some Beautox - natives, like a wizard or witch who is an expert in Beautox magic. Maybe Hermione would somehow find a way to follow Harry and she'd be there too, trying to figure out the new magic system.
Obviously, Harry himself as the son of Atlas. Then there could be the original characters like Dumbledore, who might play a role in guiding Harry about his new identity. Hermione would still be there, probably helping Harry research about Atlas. And Ron, as Harry's friend, would be involved in his adventures.
Obviously, Harry Potter himself. Then there could be the dragons, perhaps an old and wise dragon that acts as Harry's mentor. Hagrid might also play an important role as he has a connection with magical creatures and could help Harry understand his new identity.
There could be some sort of primordial council or group of elders in this fanfic. They would be the ones who have knowledge about the primordials and their descendants. Harry would interact with them, and they could either be his allies or his antagonists. Then there are the regular students at Hogwarts. Some might be jealous of Harry's new powers, while others might be in awe. And we can't forget about the magical creatures, like centaurs or house - elves, who might also have a different view of Harry due to his primordial connection.
Voldemort's remaining followers could be antagonists. They might see the baby as a new threat or a potential weapon. They could try to kidnap the baby to use its power for their own dark purposes.
Maybe the baby dragon is a rare species. This would attract the attention of magical zoologists and collectors. Harry would then have to deal with the ethical issues of keeping the dragon or giving it to those who claim to study it properly. He would also need to consider the dragon's own well - being and freedom.