Well, first of all, Harry Potter's confidence would be through the roof. Fans would constantly praise him and build him up. He would also be more experimental. Fans would expose him to different magical theories and ideas, making him more curious. His values might shift too. Instead of the somewhat traditional values he had in the original story, he could adopt more modern and inclusive values that fans today often advocate for. This would result in a Harry Potter who is not only a powerful wizard but also a very different kind of person in terms of personality and beliefs.
His character would probably be more outgoing. Since fans would be around him, they'd encourage him to be social and make friends. He might be less brooding compared to the original Harry.
He might be more confident. Since his grandfather has more life experience, he could instill in Harry a sense of self - assurance from an early age.
If Harry was raised by his mother, his understanding of magic would be different. His mother could pass on her own unique magical knowledge and skills to him. He might be more proficient in certain areas of magic earlier on. Also, his view of the wizarding world would be more positive as he grows up in a nurturing magical environment, rather than the hostile one at the Dursleys'. This would likely make him a more confident and less brooding character, and his decisions might be more based on hope and love rather than revenge or survival.
Harry's character development would be significantly different. In Potter Manor, he'd be surrounded by reminders of his family's greatness. This would instill a sense of pride in him. He might be more adventurous as he explores the manor and discovers hidden chambers and magic. His relationships with others would also be different. He'd be more likely to make friends easily as he has a stronger sense of self, and he might be more assertive in standing up for what he believes in, having been raised in an environment that values the Potter name and legacy.
The experience of being raised in Atlantis could make Harry more independent. In Atlantis, he may not have the same support system as he had at Hogwarts. He would have to rely on his own instincts and the knowledge he gained in Atlantis. This could lead to a more self - reliant and perhaps a bit more aloof Harry, but also one with a great sense of adventure and discovery.
His relationships would also change. He might not form the same friendships as in the original story. For instance, he may not be as close to Ron and Hermione in the beginning. Instead, he could be more drawn to characters who have a more spiritual or otherworldly connection, like Luna Lovegood. And his view on power and authority would be shaped by Kaguya's own complex relationship with power in her own story.
He'd be more adventurous. The Doctor's lifestyle of constantly traveling through time and space would instill a sense of curiosity and a love for exploration in Harry. He'd be less afraid to step into the unknown compared to his original character.
His character would develop a stronger sense of adventure. Skyrim is full of mysteries waiting to be uncovered. Harry would constantly be seeking out new places, new spells, and new knowledge. He'd be less sheltered compared to his upbringing in the Harry Potter series. Also, his relationships with others would be more fluid. In Skyrim, alliances can change quickly depending on the situation, and he'd have to adapt to that, which would make him more adaptable and perhaps a bit more cautious in his dealings with people.
He would be more adaptable. Growing up in Earthland would expose him to different challenges. His character would become more open - minded as he experiences new types of magic.
His character would become tougher. Gotham's rough environment would force him to be more street - smart.
He'd probably be more reserved and polite, as those are common traits in Japanese culture. His sense of honor might be more in line with the Japanese concept of 'bushido'.