The main characters might include early magical scholars or powerful wizards who played a role in shaping the wizarding world as we know it in the Harry Potter series. There could also be the first Aurors or those who first developed the magical laws. And, of course, we might meet the early members of pure - blood families that are important in the later stories, like the Blacks or the Malfoys.
Probably the ancestors of the main characters in the original series. For example, the Potters' predecessors or the early Gryffindors.
It could be the founders of Hogwarts. Since it's a prequel, they are very likely to be part of the story. Maybe we'll get to know more about Godric Gryffindor, Salazar Slytherin, Rowena Ravenclaw and Helga Hufflepuff. Their personalities, motives and how they interacted could be explored.
There could be the predecessors of the characters from the main game. Maybe the early versions of Six or the other kids we see in the original 'Little Nightmares'.
There could be the predecessors of the Gamemakers. They would be important as they are the ones who design the Hunger Games.
It's possible that there will be a character who has a connection to the later main characters in the original Hunger Games story. Maybe a relative or someone who inspired them in some way. This character could be the center of the prequel's plot, and through their story, we can see how the events of the prequel lead to the situation in the original Hunger Games.
Obviously, the illithid would be a main character. It could be a mysterious and powerful being that Harry encounters. Also, Hermione and Ron might still be important characters. They could be either suspicious of the illithid or try to help Harry understand it better. Dumbledore might also play a role, perhaps guiding Harry in his interactions with this strange new creature.
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.
Harry Potter himself could be a main character. He has a history of standing up against injustice, so it's likely he'd be involved in a revolt. Hermione would also be a key figure. Her intelligence and knowledge of the wizarding world's laws would be invaluable in planning and leading a revolt. Ron, with his loyalty and courage, would be right there with them.
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.
Harry Potter would probably be one of the main characters. He's the central figure in the original series, so it's likely he'd be involved in this fanfic in some capacity, perhaps as the hitman or someone related to the hitman - style plot.