The daughter of Zeus is the central figure. Ron and Hermione could also be significant characters. They could befriend her and help her with her studies at Hogwarts. On the Greek mythology side, Poseidon could be a character. He might be initially suspicious of the daughter of Zeus, thinking she could be a threat to his domain. But as the story progresses, they could form an uneasy alliance.
Well, it could be about a character who is both related to the Harry Potter world and is the daughter of Zeus. Maybe she uses her magical abilities from the Potter side and the godly powers from Zeus to fight dark forces that threaten both the wizarding world and the realm of the Greek gods. For example, she might use spells like 'Expelliarmus' while also being able to summon lightning bolts like Zeus.
Harry Potter himself could be the main character. Since he's the hero of the original series, it would make sense for him to be at the center of this new adventure involving Zeus' legacy. He has the experience and the courage to take on new challenges.
One possible plot could be that she discovers her divine heritage while at Hogwarts. Maybe she starts to show powers that are a mix of wizardry and godly abilities, like being able to control the weather during a Quidditch match. This would cause a stir among the students and teachers alike.
Obviously, Harry and Zeus are the main characters. Harry, who might be from the Harry Potter universe, would bring his own set of skills and personality traits. Zeus, as the king of the Greek gods, would have his power and authority. There could also be other characters from either the wizarding world or the Greek mythology that play supporting roles, like Hermione from Harry's world who could try to understand what's going on, or Athena from Greek mythology who might have an opinion on Zeus's new relationship with Harry.
Obviously, the daughter of Hera would be one of the main characters. And probably Harry Potter himself would also be a key character since it's a Harry Potter fanfiction. There might also be other characters like Hermione and Ron who interact with the daughter of Hera.
Ron Weasley might be another main character. He could provide some comic relief in the story. Maybe he is initially skeptical about the daughter of Eve but then comes to accept and even admire her as he gets to know her better. His friendship with Harry and Hermione could also play a role in how he interacts with the daughter of Eve, for example, they could all be part of a group working together to solve a mystery in the wizarding world.
One possibility could be that Harry has extraordinary powers. Since Zeus is a powerful god in Greek mythology, Harry might have the ability to control lightning or have superhuman strength. Maybe she would be in a world where she has to hide her true identity from humans and deal with the politics among the gods.
It could be Voldemort. Since he is the main bad guy in the Harry Potter series, it would make sense for him to be the antagonist. He might see the daughter of Thor as a threat to his plans of taking over the wizarding world.
Obviously, the main character is the female Harry Potter who is the daughter of Gaia. There might also be her friends at Hogwarts, like Hermione and Ron, who would play important roles in her life. They could be the ones who support her and help her figure out her powers and her place in the wizarding world. And of course, there could be some teachers like Dumbledore who would guide her on her journey, especially when it comes to dealing with her unique heritage.
Besides the usual Hogwarts crew, there could be new characters introduced who are related to Helas. Maybe there are other descendants or old friends of Helas who come forward to help or hinder Harry. These characters could bring in new magical elements and plot twists as they interact with Harry and the rest of the wizarding world.