In addition to the classic trio, we might see some new characters who are native to Australia in the fanfiction. Maybe an Australian wizard who becomes friends with Harry and helps him understand the new magical world down under. It could also be that some minor characters from the original books, like Neville, play a more significant role in this new Australian - based story.
I believe that Dumbledore or other Hogwarts professors could also be important characters in a way. Maybe they send Harry and his friends on some kind of mission to Australia in the wizarding world there. Or perhaps they communicate with the Australian wizarding authorities. So, they could be in the background guiding the story even if they are not physically present in Australia all the time.
Obviously, the marauders themselves - James Potter, Sirius Black, Remus Lupin and Peter Pettigrew. They would be central to the story as they are the ones the fanfiction is named after.
There could be the children of the original characters. For example, Harry Potter's son or Hermione Granger's daughter might be main characters.
Harry Potter himself is likely to still be a main character. He's the face of the series. Hermione and Ron will probably also be important. But new characters might be introduced too, perhaps a mysterious new student or a powerful wizard from a far - off land.
Harry Potter himself would surely be a main character. He'd be the protagonist trying to navigate this new game - like version of his life. Hermione Granger would also be important as she'd use her intelligence to figure out the rules and strategies of the game world. Ron Weasley would be there too, providing comic relief and being Harry's loyal sidekick as always.
The main characters would surely include Harry Potter. He's the center of the story as he is the one with the Veela aspect. Ginny Weasley could also be a major character. If Harry is a Veela, it would change their relationship dynamics. Additionally, Dumbledore might play a significant role as he would be guiding Harry through this new discovery and helping him understand and control his Veela powers.
In this kind of fanfiction, Neville Longbottom could also emerge as a key character. He has shown great courage and growth throughout the Harry Potter series. When Hera enters the picture, Neville could be the one who has an unexpected connection with her. Maybe his family's long - forgotten magical heritage has some link to the Greek mythology that Hera represents. And then there are the Death Eaters. If the story is set during the darker times in the wizarding world, the Death Eaters might see Hera as a new threat or a potential ally, making them important characters in the fanfiction as well.
Obviously, Harry Potter would be one of the main characters. He's the central figure in the original series. And Ophis, as the other part of the fanfiction's title, would also be a main character. Her unique abilities and personality would play a big role. Hermione and Ron could also be important as they are Harry's closest friends and would be involved in any new adventures that come about due to Ophis's presence.
Harry Potter himself could still be a main character. He has faced many enemies and situations where he has to make tough decisions. In a 'no forgiveness' scenario, he might be more hardened and less likely to give second chances. For example, when dealing with Voldemort's followers, he could be more ruthless.
Definitely characters from both 'Charmed' and 'Harry Potter'. From 'Harry Potter', Harry, Hermione, and Ron are very likely to be main characters as they are the central figures in the original series. In 'Charmed', the Halliwell sisters, Prue, Piper, and Phoebe, would be prime candidates. Their different powers and personalities would create interesting dynamics when interacting with the 'Harry Potter' characters.
There could also be characters like Dumbledore, even if in spirit or through memories. His wisdom might have influenced Harry's understanding of life debts, and his past actions could be related to debts that Harry is now calling in. And then there are the characters who owe Harry their lives. This could include Neville, who Harry has saved on multiple occasions, and their relationship could be further explored in the context of the life debt.