Well, clearly Harry and Hermione are the main characters. Harry, the boy who lived, with his courage and natural talent for facing dark magic. And Hermione, the brilliant witch, with her vast knowledge of magic and her logical thinking.
Professor McGonagall could also be a main character who interacts with Hermione. As a strict but fair teacher, she could guide Hermione in her studies and also in her personal growth. For example, she might give Hermione extra responsibilities or tasks that help her develop leadership skills.
One main character could be an older street - wise kid named Tom. He takes Hermione under his wing when she first arrives on the streets. He teaches her the ropes of surviving, like where to find the best hiding places and which people to avoid. Another character could be a kind - hearted shopkeeper, Mrs. Jenkins. Even though she knows Hermione is living on the streets, she sometimes gives her leftover food or old clothes. There could also be a mysterious figure, a wizard in disguise perhaps, who has been secretly watching Hermione. He senses her latent magical abilities and is waiting for the right time to reveal himself and offer her a way out of her difficult situation.
The main characters are Harry and Tom. Harry, the boy who lived, and Tom, who could be a complex character in this fanfiction. He might not be the evil Voldemort we know from the original story. Instead, he could be a young wizard with potential for good or bad, and Harry's influence on him is a major part of the story.
Hermione could be a main supporting character. She might help Harry and Daphne with their studies and magical research. Ron could also be there, providing some comical relief and loyalty to Harry.
One interesting plot could be that as they grow up, they discover a new magical ability together that no one else has. This new power helps them solve mysteries in Hogwarts that even Dumbledore couldn't figure out.
Obviously, Harry would be the main character. But Hermione could also play an important role. She might be initially against Harry growing his hair out, thinking it's unhygienic or against school rules, but then she comes around and helps him take care of it with some magic hair products she invents.
The main characters would be Harry and Lily. But it's possible that we could also see some appearances from the Marauders in flashbacks. Since Lily was friends with them, they could be part of the backstory. Also, Dumbledore might be involved in some way, perhaps as a guiding figure from afar, still looking out for Harry's well - being and the safety of the wizarding world.
Hermione could be a main character. She would be the one trying to figure out the magical theory behind Harry's cocoon - building and wing - growing. She might be researching in the library, looking for any mentions of similar phenomena in ancient magical texts.
The main characters are obviously Harry and Hermione. They are the ones attending the parenting class, so the story likely focuses on their experiences, thoughts, and growth during the class.
Obviously, Harry and Hermione are the main characters as it's in the title. They are the ones who are supposed to be the Riddle twins in this fanfiction.