His character might be more distrustful. Since his parents left him, he may have a hard time trusting others, especially authority figures like Dumbledore. He could be more independent too, having to fend for himself from a young age. For example, he might not be as quick to accept help from others at Hogwarts.
Naruto would be more self - assured. In the original, he was always seeking approval because he was an orphan. With his parents alive, he'd have that unconditional love and support, so he wouldn't be as desperate for others' recognition.
He would be more confident. Without the trauma of losing his parents, Harry would not have that underlying sense of insecurity. He would probably be more outgoing and less hesitant in making friends and taking risks.
His character might become more assertive and self - reliant. At Durmstrang, which has a different culture than Hogwarts, Harry would have to stand up for himself more often. He'd also learn different magical techniques, which could make him more versatile in his magic use.
He'd probably be more refined in his manners, as French culture often emphasizes politeness and etiquette. His accent would be different, of course. And he might be more confident in expressing his emotions, as the French are generally more open about feelings. Also, his view of magic might be more influenced by French magical aesthetics, which could be more about elegance and style.
He would likely be more confident. Growing up with his grandparents, who presumably love and support him, he wouldn't have the self - doubt that came from living with the Dursleys. He would be more self - assured in his magical abilities from the start.
Harry would likely become more self - reliant. Without the support of his parents, he'd have to learn to take care of himself. He might grow more cautious and distrustful, especially if he doesn't know the real reason for the disownment.
Harry could develop a more unique style of magic. His grandfather might have his own way of doing magic, and Harry would learn from that. For example, his grandfather could be more in tune with nature magic, and Harry would then incorporate that into his spell - casting, making his magic more diverse and less reliant on the traditional Hogwarts curriculum.
His character development would be extremely different. He would no longer be the 'chosen one' in the traditional sense. He might feel a sense of shame or guilt that he didn't have before. His self - confidence would take a huge hit. He would constantly be looking over his shoulder, wondering if people were judging him based on his father. His magic might also change. He could have an easier time with some of the more complex and darker spells, but at the same time, he would have to be extra careful not to let that power corrupt him. His moral compass would be all over the place as he tries to reconcile the fact that he is the son of the most evil wizard with his own desire to be a good person.
Naruto would likely become more diplomatic. As an emperor, he can't just rely on brute force like he sometimes did as a ninja. He'd have to think about the long - term consequences of his actions for the whole empire. So, he'd develop better negotiation skills.
Naruto would likely become more independent. Without his parents' attention, he would have to fend for himself more. He might grow up quicker and be more self - reliant. For example, he would have to learn to cook and clean for himself at a much younger age.