His relationship with Hogwarts students would be very different. Instead of growing up with them, he would be an outsider. When he finally meets them, they might be in awe of him or even a bit afraid because of his different upbringing.
With the teachers at Hogwarts, Harry might not have the same kind of trust or respect as he does in the original story. Since he grew up in the Forbidden Forest, he may have a more natural and wild approach to magic which might conflict with the traditional teachings at Hogwarts.
His relationship with magical creatures would be much deeper. Having grown up among them in the Forbidden Forest, he would consider them his family. He would be more likely to side with the creatures in any disputes between them and the wizarding world, which could lead to some interesting storylines.
His relationships would likely be more guarded. He might have a hard time trusting people at first. For example, when he meets Ron and Hermione in the wizarding world, he would be more hesitant to form a friendship. His idea of friendship might be more about survival and mutual benefit rather than the more innocent and pure form in the original story.
His magic might be more in tune with Japanese elements. For instance, his Patronus could take on a form related to Japanese mythology, like a Kitsune. His spell - casting could be more fluid and graceful, influenced by Japanese martial arts movements. Since Japanese magic could be more about harmony with nature, his magic might also be more attuned to the natural elements around him, like using the power of the wind that blows through Japanese bamboo forests.
He might be more used to high - tech gadgets and modern technology. In Hogwarts, he was surrounded by magic, but in the Marvel Universe, he'd also have to deal with things like Iron Man's suits and Wakanda's advanced technology. His view of the world would be broader, and he might be more adaptable to different situations.
His relationships would change significantly. For instance, with Sasuke, it might not be just a rivalry. There could be an underlying romantic tension. Naruto would be more likely to express his feelings for Sasuke in a more affectionate way. And with Sakura, instead of the typical one - sided crush, he might see her more as a friend who could help him understand his new feelings towards other male characters.
Harry Potter could survive in the Forbidden Forest by making allies. He could befriend the centaurs or the friendly spirits in the forest. They could help him find food, water, and warn him of any approaching danger.
He might encounter magical creatures that are not known to most wizards. For example, he could meet a rare breed of unicorn or a group of centaurs who take him under their wing and teach him their ways of magic and life in the forest.
Well, he might have a lot of encounters with magical creatures. Maybe he'd befriend some centaurs or learn the secrets of the forest from them. He could also face more hidden and dangerous dark magic that lurks in the forest.
In fanfiction where Harry Potter grew up in Japan, his appearance could be different too. He might be dressed in traditional Japanese wizard robes. His magic could be influenced by Japanese magic traditions. He would probably learn different spells that are unique to Japanese wizardry. Also, his friends would likely be of different ethnic backgrounds, and they would celebrate Japanese magical festivals together.
Hermione would probably be initially shocked but then try to research ways to help Harry control his vampire side. She might look for spells or potions in the library. Ron, on the other hand, might be a bit more fearful at first. He might keep his distance until he realizes that Harry is still the same person deep down. Dumbledore would likely be very understanding and offer his guidance, seeing Harry's new situation as another opportunity for him to grow and learn in a different way.
His character would likely be distorted. He might become more cynical about relationships in general. Since Hetai fanfiction often portrays relationships in a rather improper and unrealistic way, Harry might lose his sense of the true, deep - seated values of friendship and loyalty that are so central to the original story.