Obviously, Harry himself. His friends Ron and Hermione would surely be in the story. They'd be the first to notice and react to his growth spurt. Hagrid might also be involved, perhaps giving Harry some advice on how to deal with his sudden growth, like how he dealt with his own large size when he was young.
The Weasley family would likely play a role. Molly Weasley would probably fuss over Harry, making sure he has enough to eat to support his growth. And the other Weasley siblings might be a bit envious or just find it really cool. Ginny, in particular, might see Harry in a new light with his growth, adding an interesting dynamic to their relationship.
Neville could be involved too. He has grown into a strong wizard and would surely want to help his friend. Ginny, who has a special connection with Harry, would be at his side constantly. There could also be some new characters introduced, like a healer from a far - away land who has unique knowledge about Harry's condition.
Dumbledore could also play a role. He might see Harry's weight loss journey as part of his overall growth and offer some cryptic yet inspiring words. Maybe he arranges for Harry to have special training sessions with the ghosts of Hogwarts, who have unique ways of making exercise fun. And of course, the Hogwarts professors like Madam Pomfrey could be involved, ensuring Harry's health during his weight loss process.
Obviously, Harry Potter himself is the central character. Hermione Granger and Ron Weasley are also very likely to be involved. They might try to help Harry regain his hope. Dumbledore, even if he's dead in the original story, could appear in flashbacks or as a guiding spirit, trying to inspire Harry. Snape could also be part of it, as his complex relationship with Harry could add more depth to the story of Harry losing hope.
Obviously, Harry himself is the central character. Then, there could be characters like Dumbledore who might play a role in guiding Harry about his new heritage. Hermione would also likely be involved, using her knowledge to help Harry understand the Pendragon history.
One possible fanfiction could be that Hermione suddenly has a growth spurt during her fourth year at Hogwarts. This might lead to her having some awkward moments, like her robes suddenly being too short. She might also find it a bit difficult to adjust to her new height when it comes to things like flying on a broom or reaching for books on the highest shelves in the library. But in the end, she uses her newfound height as an advantage, perhaps in Quidditch strategy discussions where she can see over the heads of others and spot things they can't.
Well, it could be about Harry suddenly growing taller and stronger. Maybe he starts to outgrow his old clothes and has to quickly get new ones. His new height might also give him an advantage in Quidditch, like reaching the Snitch more easily.
One common theme is self - discovery. When Harry has a growth spurt, whether it's physical or magical, he often has to figure out what it means for him. For example, he might discover new powers and has to learn how to control them.
Obviously, Harry Potter himself is the central character as the one being abused and neglected. The Dursleys are also key characters as they are the ones who abuse and neglect him in the original story. Hermione and Ron might also be involved as they could be the ones to discover Harry's situation and try to help him. Dumbledore could also be a part of it, perhaps as someone who failed to notice or prevent Harry's abuse initially.
Obviously, Harry Potter himself. Hermione would probably be by his side, helping him research about his claim to lordship, using her vast knowledge from the library. Ron might also be there, providing moral support and his unique sense of humor in difficult situations.
Neville Longbottom could be a key character. He might take on a bigger role in Hogwarts in Harry's absence and also be in touch with Harry, providing support from the school. Ginny Weasley would also be involved as she has a close relationship with Harry. Additionally, some of the Hogwarts professors like Professor McGonagall could play important parts, either trying to bring Harry back or helping him in his mission outside the school.