Harry's development would be more complex. He would have to balance the values that Voldemort instills in him with his own innate sense of right and wrong. He might develop a more independent streak, not relying on the traditional authority figures like Dumbledore. He could become a more morally ambiguous character, trying to find his own path in a world where the definitions of good and evil are constantly being challenged by his relationship with Voldemort.
Harry would be more open to dark magic. Since Voldemort is his adoptive father, he would be exposed to different aspects of magic earlier. He might not have the same fear of the dark side as in the original story. For example, he could be more confident in using spells that are considered dark but for good reasons, like using the Imperius Curse to stop a criminal.
Often, Voldemort starts as this purely evil figure. But when he adopts Harry, he begins to show some unexpected softness. For example, he might start to protect Harry from other threats, which is very different from his usual self.
Well, he might become more confident and self - assured. After all, defeating the most powerful dark wizard of all time is no small feat. He could also be a bit more somber, having seen the true horrors of the dark side up close.
Harry becomes more confident. With Dumbledore as his adoptive father, he has a stronger support system. He is no longer as alone as he was, and this newfound security allows him to take more risks in his magical studies and in fighting dark forces. His sense of identity also shifts. He starts to see himself as part of Dumbledore's legacy, which gives him a greater sense of purpose.
He'd be more confident. With Sally's love and support, he wouldn't have the self - doubt that he had in the original story. He'd be quicker to trust people and might be more open - minded about different forms of magic.
His magical abilities might develop in a different way. The Malfoys could introduce him to different types of magic or magical artifacts. Maybe he'd learn more about the Dark Arts in a different context, not for evil purposes but just to understand it better. He could also become more skilled in areas like Occlumency earlier on, since the Malfoys might see it as an important skill to protect their family secrets. His relationship with his Gryffindor traits would be tested. He might still have his bravery, but it could be expressed in different ways, like standing up to the Malfoy family's wrongdoings.
At first, it would probably be very tense. Harry would be suspicious of Voldemort's motives, and Voldemort would be cautious of Harry's potential to rebel. But as time goes on, they might develop a strange sort of understanding. Harry could start to see Voldemort as more than just a pure evil figure, and Voldemort might start to view Harry as something more than an enemy.
Snape's character often develops from a cold and aloof figure to a more caring and nurturing one. At first, he might be hesitant and gruff, but as he spends more time with Harry, his protective instincts kick in. He starts to show more patience and understanding, which is a big change from his usual self in the original series.
Draco becomes more empathetic. Adopting Harry makes him look beyond his old pure - blood supremacist views. He starts to understand the struggles Harry has faced.
Harry could be more independent and self - reliant. Growing up with a Pegasus rather than in a human family means he has to rely on himself and his Pegasus friend more. He would learn to fend for himself at a younger age, which would make him bolder in the face of danger.
Harry becomes more empathetic. Usually, he and Snape have a rocky relationship. But when he saves Snape, he starts to see Snape in a new light. He realizes that Snape is more complex than he thought, which makes him more understanding of others' hidden motives and pain.