Another important character could be an older wizard or witch in Hermione's neighborhood who has been secretly watching over her. When she gets the letter, this person could come forward and share some wisdom or stories about Hogwarts that are not well - known.
Obviously, Hermione herself is the most important. Her parents would also play a crucial role as they react to the news of their daughter being a witch.
Her parents, of course. They would be an important part of the story as they react to the news. They might be shocked at first but then supportive.
In this fanfiction, perhaps Hermione might be even more excited than in the original story. She could start preparing for Hogwarts immediately, reading every book she can find about the school.
Percy would probably be an important character. He's Annabeth's close friend and love interest. His reaction to Annabeth getting her period could be interesting, like he tries to be supportive but is a bit clumsy at first.
Shikamaru could be an important character too. As Temari's close friend or love interest, his reaction and support would be significant in the story.
A female mentor or an older female friend could be important. This character could provide a different perspective. She might come from a different background or have unique experiences related to menstruation. She could offer Arya wisdom and guidance that her family members might not, like how to handle social situations when on her period or how to embrace this new part of her femininity.
Obviously, Harry and Hermione themselves are the central characters. Their spouses, if they have any in the fanfiction, would also be important. Their children would play a big role too, as they would be part of the new generation of the family. And of course, old friends like Ron, Ginny, and other Hogwarts alumni might make an appearance.
Obviously Hermione herself is the central character. But her friends like Harry and Ron would surely be involved. They might be shocked or supportive of her new look. Also, characters like Draco Malfoy could be involved. He might react with jealousy or new - found interest depending on how Hermione's makeover changes her overall presence.
Edward and Bella could be important characters. As Renesmee's parents, they would likely be deeply involved in the situation. They might be worried about her well - being, try to protect her from any threats related to the pregnancy, and offer their support and advice.
Harry and Ron would most likely be main characters. They are Hermione's closest friends, so they would be involved in her life change. They might be the ones to give her advice or react to her new appearance.
In many fanfictions with such a plot, it could be a so - called friend who betrays Hermione perhaps out of jealousy. Maybe they are envious of Hermione's intelligence and popularity at Hogwarts, and for some self - serving reasons, they choose to betray her.