In the fanfiction, Harry may also develop a unique magical style. Because he is away from the typical wizarding upbringing, he might discover magic in different ways. For instance, instead of learning spells from a book like in Hogwarts, he might figure out how to do magic based on his own instincts and experiences at the Dursleys' house. This could lead to him having a more unorthodox but powerful form of magic.
He could develop a stronger sense of self - preservation. Since he is in an environment where he is not fully accepted, he has to learn to protect himself, both physically from Dudley's bullying and emotionally from the Dursleys' neglect. So he might become more guarded and less trusting at first.
His magical abilities could develop in new directions. Since different families have different focuses in magic, the Greengrass family might encourage Harry to explore areas he hadn't before. For instance, if the Greengrass family is known for their potions skills, Harry could become an even better potions - maker. His self - confidence may also grow as he is part of a new family structure that supports and encourages him in different ways compared to the Dursleys.
Harry's character would likely become more stoic. Byakuya's influence would make him more reserved in showing emotions. He might also become more strategic in his thinking, as Byakuya is known for his calculated moves.
His character would develop in multiple ways. Firstly, he'd become more resourceful. The Winchesters often find themselves in tight spots, and Harry would have to learn to use whatever he has at hand, including his magic, to get out of trouble. Emotionally, he might become more guarded as he realizes the harshness of the world they live in. But at the same time, he could also develop a stronger sense of loyalty towards the Winchesters, seeing them as his new family.
Harry's character would likely become more light - hearted. Growing up with the Weasleys, he'd be surrounded by laughter and love. He might lose some of his brooding nature. His self - confidence could grow as he is part of a big family that supports him unconditionally.
His character would become more worldly. Since the Delacours are from France, Harry would be exposed to different values and ways of life. This could make him more open - minded. For example, he might be less rigid in his views on magic compared to when he was only in the British wizarding world.
He could develop new interests and skills. Since he's in a different family environment, he might be exposed to different hobbies or magical studies. For instance, if Dean's family has a tradition of potion - making in a unique way, Harry could pick up on that and become quite proficient, which would also boost his confidence.
Harry's character would likely be a mix of confusion and determination. He'd be confused by Voldemort's teachings which go against his natural inclination towards good. But his determination to find his true self would remain. He might develop a sort of duality, acting one way around Voldemort and his followers, but secretly being someone else.
Harry's character would likely become more aware of different cultures. Growing up among the Cullens, he'd be exposed to vampire culture. This would make him more open - minded. He might also become more cautious, as vampires have different threats compared to the wizarding world.
He could become more shrewd in his dealings. Goblins are known for their business acumen, and living with them, Harry would be exposed to their ways of negotiation and deal - making. This would make him more cautious and calculating in his interactions with others.
His character would likely become more conflicted. Harry was always a symbol of good in the original series, but under Grindelwald's influence, he'd be exposed to different ideas of power and control. He might start to question his own beliefs.