His confidence might grow. Military books are often full of tales of heroes and great leaders. Reading these could inspire Harry to be more assertive and believe more in his own abilities to lead and make tough decisions. For instance, he might be quicker to take charge in dangerous situations without hesitation.
Harry's view of the world around him could change. Military books often deal with complex geopolitical situations. In the wizarding world, this could translate to him seeing the different factions (like pure - bloods, half - bloods, and Muggle - borns) in a new light. He might start thinking about how to bring about peace and stability in the wizarding world not just through fighting, but also through diplomatic means inspired by military history.
She could become even more vindictive. If she reads about characters who oppose her in the fanfiction, she might take it as a personal affront and start planning harsher punishments for any students who show signs of rebellion in the real Hogwarts, just like in the books.
He might become more empathetic. Fanfiction often shows different perspectives of characters, and this could make him see things from other's points of view, though it's a long shot considering his nature.
He'd be more disciplined. His character would be shaped by military values. He'd be less likely to act impulsively and more likely to think things through strategically.
He might feel a bit embarrassed. After all, these are often people's wild imaginings about his personal life.
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.
Harry could become more rebellious in character. Piercings are often associated with a sense of non - conformity. So, he might start to question more of the traditional wizarding rules and ways. He could even start a small movement among the students to be more individualistic.
His character might become more complex. He could have a darker side that he has to struggle with. For example, he may be more withdrawn at times due to the dementor's influence.
His character would likely become more studious and curious about ancient magic. Since Flamel is associated with alchemy, Harry would be exposed to a different type of magic, which would make him more eager to learn.
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.