Often, the main character is an original creation. This could be a self - inserted character who has read the Harry Potter books in their own world and somehow gets transported into the wizarding world. They then use their knowledge of the story to become a 'conqueror' and change things for the better.
Sometimes, it could be a side character from the original series who is given a more prominent role. For example, Neville Longbottom could be the main character in a 'Harry Potter conqueror fanfiction'. He already had a great potential in the original books, and in the fanfiction, he could fully realize that potential, becoming a powerful wizard who conquers the remaining Death Eaters and restores peace to the wizarding world in a different way than Harry did.
Dumbledore is often a main character in Harry Potter 1945 fanfiction. Since he was around during that time, many stories explore his youth, his friendships, and his early battles against the dark forces.
Obviously, Harry Potter himself is often a central character. His friends like Hermione Granger and Ron Weasley also frequently appear. In some fanfictions, they might play different roles compared to the original books. For example, Hermione could be the one who stumbles upon a dark secret first and has to convince Harry and Ron to take action.
His sisters, Visenya and Rhaenys, are often paired with him. In many fanfictions, they play crucial roles in his conquest. Their relationships with Aegon are complex, and writers like to explore how they support and sometimes compete with him.
Harry Potter himself is often involved. He might be the one to encounter the first signs of inflation, whether it's a magically inflating potion or an enchanted object. His friends, like Ron and Hermione, are also likely to be part of the story, helping him figure out what's going on.
Often, Harry Potter himself might be a main character in such fanfiction. The idea of him having some daywalker - like abilities could be explored, perhaps as a result of a strange encounter or a new form of magic. Hermione Granger could also be a key character, using her intelligence to help Harry understand and control his new powers if he were to become a daywalker.
Some fanfictions might also focus on lesser - known characters from the Sacred 28 families. Maybe a minor Prewett or a Weasley relative that we don't know much about in the original books. They could be given a more prominent role, perhaps as a hero or a villain within the Sacred 28 - related storylines.
Voldemort can be a major character in such fanfiction. Picture him with a dark and menacing saber, adding an extra layer of threat. Ron might also be there, and his loyalty to his friends could be tested in saber - related adventures, like when they are on a quest to find a powerful saber or defend against saber - wielding enemies.
The Prince, whoever he may be in the fanfiction's interpretation, is obviously a main character. His backstory, his intentions, and his influence on the other characters are what drive much of the plot. Additionally, Dumbledore might also be a significant character as he often has a role to play in the overarching story of the wizarding world and could be involved in the events related to the Prince.
Ron Weasley could also be a key figure. He might be Harry's loyal friend as always, standing by his side during all the changes that Harry is bringing about in the wizarding world as a god. And there could be new characters introduced as well, perhaps other gods or magical beings that interact with Harry in this new fanfiction realm.
In some cases, Albus Dumbledore could play an important role. His wisdom and power in the wizarding world would make him a key figure in any situation where the two different universes collide. He might be the one to first discover Alexstrasza's presence and figure out how to make use of her abilities in the fight against the dark forces in the Harry Potter world.