His sense of justice would be more individualistic. In the original Harry Potter series, Harry fights for the greater good of the wizarding world. But if raised by Vergil, Harry would probably have a more personal view of justice. He'd be more likely to take matters into his own hands and dispense justice as he sees fit, rather than following the rules and institutions of the wizarding world.
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.
If Harry Potter was raised by Natsu, his personality would change drastically. Natsu is a very passionate and hot - tempered character. Harry would be influenced by this passion and would be more driven in his pursuits. He would no longer be the meek boy who was bullied by the Dursleys at the start. Instead, he would be more confident and assertive. His sense of justice would also be more like Natsu's, which is more about immediate action rather than following a set of bureaucratic procedures. He would probably have a stronger sense of loyalty towards his friends as well, because Natsu values friendship above all else and would instill this value in Harry.
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.
His personality would be much more calm and centered. Yoda's influence would make Harry less impulsive. He would think more before acting, which is a big change from the sometimes - rash Harry in the original books. He would also be more in touch with his emotions in a different way, not suppressing them but understanding their place in the grand scheme of things.
He might be more arrogant. Growing up with the Malfoys, he'd be used to thinking his family was superior. He'd lack the humility Harry in the original series has.
He'd be much more somber. Dementors drain happiness, so he'd lack the cheerfulness that normal Harry has.
If raised by Dr Doom, Harry Potter's personality would transform in multiple ways. He would lose much of his initial humility. Since Dr Doom is all about self - aggrandizement and power - hoarding, Harry would start to view himself as superior. His sense of humor would likely fade as Dr Doom is a rather serious character. Harry would also be more secretive. In the original story, Harry often shared his problems with his friends, but under Dr Doom's tutelage, he would keep things to himself more. He would be more independent, but in a rather lonely way, as his relationships would be more about power dynamics rather than true friendship.
He'd be more brash. Harley's bold and in - your - face nature would rub off on him. He'd probably be less hesitant to take risks.
His personality would likely become more reserved and secretive. Growing up under Morgana, who is often associated with the shadows in legend, Harry would be less likely to trust easily. He might also be more calculating, always thinking several steps ahead like Morgana was known to do in her schemes.