Harry's relationships might also change. Some students might be in awe of him and want to be his friend just because of his wings. However, others might be jealous. He would also have to deal with the stares and whispers. But overall, his wings could give him a new sense of confidence and independence, allowing him to face his enemies, like Voldemort, with a different kind of courage.
His mobility would change drastically. He could fly to class instead of walking, which would be a huge advantage in terms of time - saving, but also might get him in trouble with the school rules. For example, flying in the corridors is usually not allowed.
His life would become more complex. He would have a new family bond to consider. He'd likely be more protective and might start to think about his future in terms of his sister as well.
If Harry Potter becomes part of a Pokemon fanfiction, his life would change in many ways. Firstly, his daily routine would be different. Instead of going to magic classes, he'd be out in the wild looking for Pokemon. His friends might also change as he'd befriend other Pokemon trainers. His relationship with magic might even be affected. He could start using magic in new ways related to Pokemon, like using spells to communicate with them. And his sense of adventure would be redirected towards exploring the different regions in the Pokemon world.
His focus would shift from just magic and wizardry to also include the world of animations. He'd probably be constantly thinking about the next animation he wants to watch.
His view of heroism would change. Hellboy is a very different kind of hero compared to the wizards in Harry's world. He's more of a brawler and has a darker, more gritty approach to fighting evil.
His life would change drastically. He'd be surrounded by Death Eaters and the dark side of magic. His values would be challenged, and he might not have the same friends. He could become more feared in the wizarding world.
He'd probably have a different accent. And his diet might change too, more burgers and fries perhaps. His view of the wizarding world could be more influenced by American values like equality and freedom.
His daily routine would change a great deal. Instead of waking up to the cold and often dreary UK weather, he'd wake up to the warm sun of Hawaii. He might start his days with a swim in the ocean rather than a walk around the Hogwarts grounds.
If Harry had no eyes, his experience at Hogwarts would be transformed. He couldn't read textbooks in the traditional way. Maybe he would use magic to have the words read to him. His interactions with magical creatures would be different too. For example, when facing a basilisk, he couldn't look it in the eye to defeat it, so he would have to find another way, perhaps using his sense of smell to detect its presence and then cast spells blindly in its direction.
If Harry Potter ate a devil fruit in fanfiction, his identity would be more complex. He would no longer be just a wizard. He would be a wizard with the extraordinary powers of a devil fruit. His battles would be different. He could use his devil fruit power to surprise his enemies. For instance, if he had a devil fruit that allowed him to turn invisible, he could use it in combination with his disillusionment charm for an even more effective stealth approach. His life would be filled with new adventures as he explored the limits of his combined powers and tried to keep them a secret from those who might misuse this knowledge.