He might add more practical magic courses. For example, he could introduce a course on advanced Patronus charm techniques. This would be useful for students to protect themselves in the real world. He may also include a unit on magical creatures' rights and how to interact with them ethically, as he has his own experiences with various magical creatures.
He might add a course on the history of the Dark Arts, not just the dark spells but also the people and events that led to their creation. This would give students a deeper understanding of what they're up against. For example, they could study the rise of Voldemort in more detail, including the social and political climate that allowed him to gain power.
Snape's relationship with Harry could become more complex. He might start to see Harry as more than just Lily's son. As headmaster, he has to ensure Harry's safety and development. This could lead to some awkward but necessary conversations between them. Snape may also use Harry as an example to show the other students what it means to be brave and stand up against evil, which in turn makes Harry see Snape in a different light.
His relationship with magic could also transform. Without the support of the wizarding community, he may start to explore magic in his own way. He could discover new spells or magical abilities that are not taught at Hogwarts. This newfound knowledge might be a double - edged sword. On one hand, it could help him survive as an outcast. On the other hand, it could further isolate him as it makes him even more different from the others.
He becomes more assertive. Instead of waiting for others to tell him what to do, he takes the initiative. For instance, he would be more likely to confront the Ministry of Magic directly about their wrongdoings.
He becomes more decisive. As a leader, Naruto can't afford to be indecisive like he sometimes was in his youth. He has to quickly make choices that affect the whole village or group he's leading.
Maybe it's a magical twist. There could be a prophecy that states Harry must take on the role early to save Hogwarts from a great threat. So, the wizarding world bends the rules for him.
Physically, of course, there are the obvious changes. But more importantly, her personality might become more nurturing. For example, she could be more empathetic towards others' feelings, which might change how she interacts with Neville or other students who were bullied. Also, she might be more in tune with her emotions and not suppress them as much as male - Harry did.
When Harry Potter becomes part phoenix in fanfiction, his relationship with the magical world around him would shift. He could communicate with other phoenixes in a way normal wizards can't. This would give him access to knowledge and secrets that are hidden from others. Also, his role in the wizarding community would become more special. People would look at him not just as the boy who lived, but as a unique being with the powers of a phoenix. He might be seen as a symbol of hope and renewal, much like the phoenix itself.
He becomes more detached from the petty squabbles of the wizarding world. His concerns shift from things like Voldemort and Hogwarts politics to the well - being of the entire universe.
Well, it changes their relationship in many ways. First, they have to interact on a more professional level. Draco, as a lawyer, has to be objective, but his past with Harry makes it complex. They start to see each other in a new light. Harry might see Draco as more reliable and intelligent, and Draco might see Harry as someone who has grown and is worthy of his legal defense.