If Harry Potter was raised by Maito Gai, his personality would likely be much more exuberant. Gai's positive and energetic nature would rub off on Harry. Harry might be more openly confident and enthusiastic about facing challenges, rather than the sometimes hesitant boy we see in the original series. He could also have a stronger sense of camaraderie, inspired by Gai's bond with his friends and students.
Well, Harry's personality would be a total transformation. Maito Gai is all about 'youthful exuberance' and 'the power of hard work'. Harry would grow up with this intense motivation. He'd probably be more physically fit and active too, given Gai's focus on training. His magic might even be used in more creative and flamboyant ways, as Gai would encourage him to be bold. Instead of being a bit of a loner at times, Harry would be in the center of a group, like Gai always is with his friends.
One new ability could be enhanced focus. Maito Gai emphasizes concentration in his training. Harry, under his care, would be able to better focus his magic, making it more powerful and accurate. He might also develop the ability to sense danger more acutely. Gai's own perceptiveness and battle - hardened instincts could transfer to Harry. And Harry's magical stamina could improve because of the physical conditioning he'd get from Gai - inspired workouts, allowing him to cast more spells without tiring easily.
Maybe it's an existing minor character from the Harry Potter universe who is given a new identity and role as 'gai'. For example, a little - known wizard who has been living in seclusion but has some extraordinary abilities and decides to take Harry under his wing.
Perhaps Gai, being a character with strong beliefs, would raise Harry to have a different perspective on the battle between good and evil. Instead of the traditional black - and - white view in the Harry Potter series, Harry, under Gai's influence, might see that there are more shades of gray. Gai could also introduce Harry to a different set of allies and enemies, which would completely change the course of Harry's adventures in the wizarding world.
His personality would likely be more cold and calculating. He'd be used to getting his way through underhanded means taught by the villains.
His personality might become more alluring like the Veela. He could be more confident in his appearance and charm, which is different from the somewhat self - doubting Harry in the original story. He may also be more in tune with his emotions as Veela are known for their passionate nature.
He'd be more reserved. Vergil isn't exactly a talkative and outgoing person. Harry would likely follow suit, keeping his thoughts and feelings to himself more often.
Harry's personality would be a lot more complex. Instead of the somewhat naive and overly - trusting Harry we know, he would be more calculating. Loki's influence would make him question people's motives more. He would also be more confident in his abilities, not just relying on his friends all the time. He might have a darker sense of humor too, given Loki's nature. And his sense of loyalty could be more conditional, depending on what he could gain from a relationship.
His personality might become more reserved. Growing up with a Shinigami would expose him to different values than the normal wizarding ones. He might not be as quick to trust or be as carefree as in the original story. Instead, he'd be more cautious and perhaps a bit more brooding, always thinking about the deeper meaning of things and the consequences of actions.
His personality would be greatly influenced by the forest environment. He would be more wild and free - spirited. Growing up away from the constraints of wizarding society, he would have a different set of values. He would be more empathetic towards animals and nature, seeing them as equals rather than something to be used. He would also be more solitary at first, but once he meets others, he would form very deep and loyal relationships as he values connection on a deeper level.
Harry Potter's personality would be drastically altered. Growing up with Azazel, he would lack the warm and nurturing environment that shaped the original Harry's kind - hearted nature. He might be more aloof and detached from others. Instead of being the hero who stands up for the weak, he could be more interested in using his power for his own gain. His sense of right and wrong would be blurred, influenced by Azazel's amoral ways, and he may not hesitate to use dark means to achieve his ends.