He'd be much more somber. Dementors drain happiness, so he'd lack the cheerfulness that normal Harry has.
His personality would be extremely altered. He'd be distrustful and perhaps even cruel at times. Growing up with dementors, he'd have no real concept of love or friendship in the beginning. He might see other people as either threats or potential victims, just like how dementors view humans. It would take a lot for him to open up to the idea of positive emotions and relationships.
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.
He might become more reserved. Shinobi are often taught to keep their emotions in check, so Harry would be less likely to be as openly angry as he sometimes is in the original story.
His personality would be more aggressive. Yautja are hunters, and growing up with them, Harry would adopt their aggressive nature. He would be more direct in his actions and less likely to hesitate.
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.
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.
Harry's personality would become more self - assured and unapologetically different. The Addams family's environment would teach him not to conform to the norms of the wizarding world. He would be more open - minded about different forms of magic and creatures. For instance, he might not be as quick to judge dark creatures like werewolves or vampires as the rest of the wizarding community. Instead, he would approach them with the same level - headedness and curiosity that the Addams family shows towards all things unusual. This would make him a bit of an outcast in some ways, but also a very interesting and unique figure in the wizarding world.
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.