Emotionally, he could have changed a great deal. If in the fanfiction he faced some personal challenges over the summer, like dealing with the loss of a friend or a new family situation. This might have made him more withdrawn or on the contrary, more determined to face his enemies. For example, if he discovered some secrets about his family that made him question his identity, it would have a profound impact on his emotional state.
In some fanfictions, Harry might change physically. He could have grown taller or more muscular from any summer training he did. For example, if he was secretly practicing Quidditch on his own, it could have affected his physique. Also, mentally he could have become more mature. Maybe he spent the summer reading advanced magic books and this broadened his understanding of magic, making him more confident and less impulsive in his actions.
Well, physically he could change too. Fanfic writers might describe him as growing taller or stronger during the summer break. Emotionally, he might deal with his past traumas better. For example, if he had nightmares about Voldemort, he could learn to overcome them, perhaps through some new magical techniques he discovers or with the help of his friends. This could make him more resilient and less haunted by his past, which is a significant change for his character.
Harry Potter changed fanfiction in several ways. For one, it had a massive global fan base. This large number of fans meant that there was a huge demand for more stories set in the Potterverse. So, fanfiction writers had a large audience eager for their works. Also, the detailed world - building in the Harry Potter series provided a great foundation for fanfiction. Writers could draw on elements like Hogwarts, magic spells, and magical creatures, which made it easier to create engaging fan - made stories.
Often, he becomes more self - reliant. Since he can't always count on others during the summer away from Hogwarts, he learns to solve problems on his own. For instance, if there's a magical creature causing trouble near the Dursleys' house, he has to figure out how to deal with it without the help of teachers or friends right away.
One common theme is self - improvement. Harry often uses the summer to better himself, whether it's learning new spells or getting in better shape.
Hermione would be a likely helper. She's always into books and knowledge, so she'd probably be right there with Harry, sharing her insights and helping him find relevant information.
One way could be in his relationships. He might have made new friends or mended broken relationships. For instance, if he had a falling - out with Ron before the summer, during the summer months in the fanfiction, he could have worked on getting their friendship back on track.
Snowball undergoes significant changes throughout the novel. His character develops and evolves in response to various plot events and interactions with other characters.
At first, it would probably be very rocky. Snape has long - held grudges against Harry, and Harry doesn't trust Snape much either. But as time goes on, they might find common ground. Maybe they both love a particular type of magic or have a shared goal of protecting Hogwarts from an unseen threat.
Harry Potter himself is surely important. He is the main character and the one going through the 'summer of change'.