His character development could be a long and complex process. At first, he might be obedient to Bellatrix due to her being his caregiver. But as he discovers more about his demigod side, he could start to question her teachings. He might become more independent and start to form his own moral code. For example, he could learn about the demigod concept of balance and try to apply it to the wizarding world, which is often filled with black - and - white views of good and evil. This would lead to him having a more nuanced view of the world around him.
The plot could revolve around Harry's struggle to fit in. Since he is a demigod raised by Bellatrix, he is likely to be an outcast in both the wizarding and demigod communities. The wizarding world may not understand his demigod powers and the demigod world may not accept him because of his connection to Bellatrix. He might have to go on a journey to find others like him or to find a place where he truly belongs. Along the way, he could face many challenges and enemies, both magical and perhaps related to his demigod status.
His character would be under great pressure. He might become more secretive and cunning as he tries to hide his true feelings. Since Bellatrix is so unpredictable, Harry would need to be on guard all the time, which could make him more paranoid than the normal Harry we know.
Harry would likely be more conflicted. With Bellatrix's influence, he might have a darker edge to his personality. He could be more aggressive in his approach to problems. Sirius, on the other hand, would try to keep him on the right path, so there would be an internal struggle. He might not be as quick to trust as the original Harry, but more cautious and calculating.
Harry might be more self - assured. Since his grandparents are likely to be more loving and supportive than the Dursleys, he would grow up with a better sense of self - worth. He could be more open - minded as well, because his grandparents' different parenting style would expose him to different ideas and ways of thinking.
His character would become more reserved perhaps. Sesshomaru is not very expressive, and Harry might pick up on that. He would also be more self - sufficient and less likely to rely on others easily.
Harry would likely be more confident in his Quidditch abilities right from the start. Since Krum is a Quidditch hero, he would train Harry well. So, Harry might be more cocky on the Quidditch pitch compared to the original story.
Harry could become more secretive and distrustful. Growing up with Bellatrix, who is part of the Death Eaters and has a lot of secrets, Harry would learn to keep things to himself. He may not trust others easily, even those who seem friendly, as he has been brought up in an environment full of lies and hidden agendas.
He could develop a more cunning side. Bellatrix is a sly character, and Harry would need to learn to be crafty to survive in her world. This would be a big change from his usually straightforward and brave self. For example, he might learn how to deceive Death Eaters or other threats.
Hermione's character would become more complex. She might start off being more in tune with the dark side, but her natural goodness could still be there. It would be like a battle within her. She could have a very different style of magic, more in line with Bellatrix's chaotic and powerful style. However, she would also face a lot of internal conflict as she realizes the true nature of the things she's been taught.
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.