His character would become more reserved. Growing up with Snape, he'd be influenced by Snape's brooding nature.
Harry's character would likely be more complex. He'd have to deal with Snape's mixed feelings towards his parents. This would make him more introspective and perhaps a bit more cynical about the world of magic. He might also be more independent, as Snape wouldn't coddle him like others might expect.
If adopted by the Snape family, Harry would grow up in an environment full of secrets and grudges. His character would develop in a more somber way. He'd be constantly aware of the past between Snape and his parents. This could make him more guarded in his relationships. He might also become more studious, especially in areas that Snape values like Potions and the Dark Arts related knowledge. His sense of right and wrong might be more blurred compared to the original story, as he'd be exposed to Snape's grey - area morality more closely.
His character would likely become more reserved. Snape's influence would make Harry more cautious and less impulsive. He would be more attuned to the darker aspects of magic and the wizarding world.
Harry's character would likely become more open - minded. Since the OC family is different from the Dursleys and even Hogwarts, he'd be exposed to new ideas. For example, if the family is very laid - back about magic use, Harry might become more experimental with his spells.
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.
Harry would likely become more self - assured. With Merlin as his mentor, he'd have access to ancient wisdom. He might be less impulsive as he learns from Merlin's calm and collected ways.
His character would become more hardened. Constantine's world is tough, so Harry would grow up quicker. He'd be more street - smart.
His character would become more adaptable. Having to fit into the Cullen family, which is so different from what he's known in the wizarding world, would force him to be more flexible. He might become more secretive as well, since he'd need to hide his wizarding past from most of the vampire world.
His character could develop in several ways. Firstly, he would gain a sense of self - worth as Hecate chose him. He would become more in tune with his emotions as Hecate might teach him to use his feelings in magic. Also, he would be more open - minded, exploring different forms of magic that could change his view of the wizarding world and his place in it. He may become more of a leader, using his new knowledge to guide others in the fight against evil.
Harry's character could develop a sense of wonder that is even greater than in the original story. Living with fairies, he would be exposed to their magical and often whimsical ways. He might start to see magic as something that is not just for fighting dark forces but also for creating beauty and harmony. He could become more of an artist of magic, using it to create amazing displays of light and color in the forest where he lives.
His character might become more sophisticated. The French culture's influence could make him more refined in his manners.
His character would likely be very different. He might be more cynical. Growing up with Voldemort, he would be exposed to a lot of dark and cruel things. He may start to question the concepts of good and evil as they are traditionally defined in the wizarding world.