If Harry was raised by the Longbottoms in fanfiction, his character would be quite different. The Longbottoms are known for their loyalty and their connection to nature. Harry would grow up with a stronger sense of family loyalty, perhaps being more protective of Neville and his family. He would also have a deeper understanding of Herbology, which could influence his problem - solving skills. Instead of being the 'Chosen One' in the typical sense, he might see himself more as part of a family unit that has a role to play in the wizarding world. His self - identity would be less centered around being an orphan and more around being a Longbottom in spirit.
Well, in this fanfiction scenario, Harry would be raised in a different family environment. The Longbottoms, having their own history of struggle against the Dark Arts, would instill in Harry a sense of determination and a different perspective on the fight against Voldemort. His relationship with Neville would be complex yet interesting, as they would share a family bond. And perhaps, his magical education would have a different slant, influenced by the Longbottoms' way of doing things.
Well, in some fanfictions, Harry might use his advanced magic skills. He could use a combination of powerful healing spells he learned from Hogwarts or perhaps some ancient magic that he discovers. Maybe he has to face some challenges or overcome certain dark forces that were causing the Longbottoms' problems in the first place.
His personality would likely be more reserved. Growing up with the Greengrass family, he might not be as impulsive as in the original story. He would be taught to think before acting, a trait often associated with Slytherin. So, he would be less likely to jump into dangerous situations without a plan.
Harry might have an easier time with spells related to transformation. Just as Poseidon can change the form of water, Harry could be more adept at transfiguration spells. He could also have a natural ability to breathe underwater and perform magic while submerged, which would be a huge advantage in certain situations. This would open up new possibilities for him in both the wizarding world and any underwater adventures he might have.
Mentally, Harry would be more in tune with the Force. This would give him an edge in sensing danger and the intentions of others. His ability to resist the Imperius Curse might be stronger due to Jedi mental training. Instead of using spells for divination, he could use the Force to foresee events. And his telepathy - like abilities from the Force could be used in place of some magical communication spells.
If raised by Toriel, Harry's personality would be greatly influenced. Toriel is a character who values life and peace deeply. Harry would grow up with a stronger sense of these values. He would be less likely to seek revenge or be overly aggressive in the face of his enemies. Instead, he might try to understand their motives and find more peaceful solutions. His relationships would also be more harmonious. He would be more of a mediator, using his understanding of different perspectives (thanks to Toriel's teachings) to resolve conflicts. This would make him a very different kind of hero in the wizarding world compared to the one we know from the original series.
Harry would likely be more confident. Sirius is a bold and brave character, and growing up with him would instill those qualities in Harry more strongly. He wouldn't be as meek as he was in the early days at Hogwarts.
It could be more nature - based in a different way. The Al Bhed have their own relationship with the world around them. Harry's magic might incorporate elements from Al Bhed beliefs about nature. So instead of just using the typical Hogwarts spells for herbology, he could use Al Bhed - inspired magic that has a deeper connection to plants and the environment.
Harry would probably be more aloof. The Black family has a certain air of aristocracy. So, he might be less approachable than in the original story. He could also be more secretive, having grown up in a family where family secrets are highly guarded.
He'd be more cautious. Natasha is a spy, always aware of her surroundings. Harry would learn to be like that. He'd be less likely to rush into things without thinking.