His sense of morality could be challenged. Vampires have a thirst for blood, and Harry would have to struggle with the urge to feed. This would make him question his own values. For example, he might wonder if it's okay to drink animal blood instead of human blood, like some vampires do in certain stories.
He would gain a new sense of power and identity. With his new vampire abilities, he has to learn to control them. This could lead to a more confident Harry in some ways, but also a more conflicted one. He has to balance his old self, the boy wizard, with his new self, the vampire. He might also start to see the wizarding world from a different perspective, as a vampire who is now somewhat of an outsider to the normal wizarding community.
He would become more solitary. Vampires are often loners in lore, so Harry might start to withdraw from his friends a bit.
His appearance would likely change. He could have paler skin, redder eyes perhaps. And his senses would be heightened. He would be able to smell blood from a distance, hear the faintest of sounds. Also, his speed would increase. He could move like a blur, which would be a huge advantage in many situations, like escaping from danger or chasing after someone or something.
As a girl, Harry might be more cautious in some situations. In the original story, Harry was often quite bold and impulsive. But now, she might think twice before jumping into dangerous situations. Also, her relationships will shape her differently. She may be more nurturing towards her friends, and this could change the group dynamic. For instance, instead of leading the charge all the time, she could be more of a behind - the - scenes organizer, using her new - found femininity to bring the group together in different ways.
Well, Harry's character would develop in multiple ways. Firstly, he would be more relaxed as he doesn't have to constantly worry about being punished or neglected. The Grangers' love and care would make him more trusting. He would also gain a better understanding of Muggle society, which would make him a bridge between the wizarding and Muggle worlds in a different way than he was before. His magical abilities might be nurtured in a more patient and scientific way, as the Grangers are used to a methodical approach to things.
In a fanfic where Harry gets turned into a vampire, one thing that could occur is that he would be shunned by the wizarding community at first. They would see him as a threat. But he could also use his vampire powers to his advantage in fighting the dark forces. He might be able to use his enhanced senses to detect danger earlier. Also, his immortality could change his perspective on life and his long - term goals. He could become more isolated as he outlives his friends, or he could try to find a way to reverse the transformation.
His magic could be enhanced by his vampire abilities. For instance, his speed as a vampire might make his spell - casting quicker.
Harry would likely become more empathetic. Since he'd be seeing things from his mother's point of view, he'd understand the emotions and struggles that others go through better. For example, if Lily had memories of dealing with difficult classmates, Harry could use that to be more understanding of his own peers at Hogwarts.
Harry may develop a more humble and hardworking nature. Elves are known for their loyalty and hard work, and growing up among them would likely instill these values in him. He might be less likely to seek glory or attention like he does in the original story.
In this fanfic, Harry's character development could be quite significant. Being raised by the Delacours, he would be exposed to a different set of values. He might grow to be more confident in his magical abilities as the Delacours could encourage him more freely. Also, his sense of family and loyalty could expand as he becomes part of the Delacour family. He may learn to be more diplomatic, dealing with the different personalities within the family and their friends. This new environment would shape him into a different kind of wizard compared to the one we know from the original series.
Harry's character may develop through the challenges of nation - building. He has to become more responsible and make tough decisions. For example, he might start as a hesitant leader but gradually become more assertive as he realizes the importance of his role.
He becomes more confident. With the unique magic focus, he has something that sets him apart. This newfound power or ability makes him less self - doubting and more assertive in his actions.