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 interesting plot could be Hermione's growing friendships. She might form closer bonds with some characters that were just acquaintances in the original story. For example, she could become really good friends with Neville and help him gain more confidence in his magical abilities.
One common theme is her academic growth. Hermione is known for her intelligence, and in these fanfictions, it often shows how she continues to expand her knowledge. Another theme is friendship, particularly her bond with Harry and Ron as they all grow up together.
Obviously, Harry himself is the central character. His friends like Ron and Hermione usually appear as well. The professors such as Dumbledore, McGonagall, and Snape are also common characters. They play important roles in guiding Harry as he grows up at Hogwarts.
One possible plotline could be Harry making new and unexpected friendships. For example, he might befriend a shy Hufflepuff student who has a hidden talent for magic that helps Harry in some way. Another could be Harry exploring parts of Hogwarts that are usually off - limits, like a long - forgotten attic filled with old magical artifacts.
One possible plot could be that Hermione, having lost her parents at a young age, has to fend for herself on the streets. She might use her intelligence to outwit those who would take advantage of her. For example, she could befriend other street - smart kids and together they form a sort of 'family' where they share resources and knowledge. She could also be constantly on the run from the authorities who want to put her in an orphanage or some less - than - ideal institution. And perhaps, she discovers a hidden magical alley in the city that only she can access, which gives her access to magical resources she uses to survive and learn more magic on her own.
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.
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.
One possible plotline could be Severus acting as a mentor to Hermione as she grows. He might teach her advanced potions in a more private setting, sharing his deep knowledge of the subject. This could lead to Hermione developing a new respect for Severus, different from the initial wariness in the original story.
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.