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.
If Harry was raised by Sauron, his character development would be complex. At first, he would be molded by Sauron's teachings. He would be confident in using dark magic and have a certain arrogance. However, as he interacts with the wizarding world or discovers his past, things would change. He could start to feel empathy for those who oppose Sauron. His magic might transform from being purely dark to something more nuanced, as he tries to reconcile his upbringing with his true nature. He might even become a sort of anti - hero, not fully on the side of good or bad, but trying to make things right in his own way.
His character would become more self - reliant. On Kamino, he may not have the same support system as in Hogwarts. So he'd learn to fend for himself faster. He'd also be more adaptable to new and strange situations as Kamino has a very unique environment.
If raised by Hera, Harry would develop a more regal and commanding presence. Hera's teachings would shape him into a more disciplined wizard. He would probably be less impulsive and more calculating in his actions, having learned from Hera's strategic mind. His sense of right and wrong would be more firmly rooted in the grander ideals of justice that Hera represents, rather than just the simple good - vs - evil of the wizarding world.
Harry Potter's character, if raised by Flamel in fanfiction, would be a blend of Flamel's wisdom and his own innate courage. He would be more patient, having learned from Flamel's centuries - long experience. His sense of justice would be more refined, as Flamel could teach him about the long - term consequences of actions. He might also be more independent, as Flamel would encourage him to explore magic on his own terms, while still providing guidance when needed. This would make him a more well - rounded and formidable wizard in the wizarding world.
If raised by Magneto, Harry's character would develop a more militant side. He'd see the world in terms of power struggles more clearly. Instead of waiting for threats to come to him, he'd actively seek out those who oppose him, like Voldemort, much earlier. His sense of justice would be more aligned with Magneto's views, which could lead to a more ruthless approach in dealing with enemies. He might not be as forgiving as in the original story and would be more likely to use extreme measures to protect what he believes in.
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.