He'd be more of a badass. Harry would probably be more confident and assertive, taking charge like Fury. He might not be as hesitant in the face of danger as in the original books.
One possible plot could be that Harry Potter, as the son of Nick Fury, grows up in the wizarding world but with an added sense of secrecy and strategic thinking inherited from Fury. He might use his father's espionage skills to uncover dark secrets in Hogwarts, like a new Death Eater plot. He could also have a unique way of using magic, combining it with the combat and intelligence - gathering tactics he learned from Fury.
If Harry Potter was raised by Nick Fury, his personality would transform significantly. He would be more self - confident in a different way. Instead of relying on the love and support of his friends as much, he would trust in his own abilities and training. Harry would be more of a lone wolf, not shying away from working alone if it meant getting the job done. His sense of humor would likely be drier, more like Fury's sardonic remarks. He would also have a greater sense of urgency and purpose. In the wizarding world, he might not be as patient with the slow - moving bureaucracy of Hogwarts or the Ministry of Magic. He would be more action - oriented, ready to jump into a situation and fix it rather than waiting for others to make a move.
At the beginning, their interaction could be full of misunderstandings. Harry might not understand Fury's no - nonsense attitude towards threats, and Fury could be put off by Harry's use of magic which he can't immediately explain. However, as they learn more about each other's worlds, they could start to work together. Harry could use his magic to help Fury in situations where normal technology fails, and Fury could offer his strategic thinking and resources to Harry in dealing with magical threats that have implications in the Muggle world.
He would be more confident in his powers from the start. Since Jean Grey is a very powerful mutant, Harry would inherit some of that self - assurance. He might also be more empathetic, as Jean has strong telepathic abilities that often involve understanding others' emotions.
He would be more in tune with nature. Since Dionysus is associated with nature, Harry might have an instinctive understanding of plants and animals that normal wizards don't. For example, he could communicate with magical beasts on a deeper level.
The friendship could start from mutual respect. Harry would respect Fury's leadership and combat skills, while Fury would admire Harry's magical abilities and his courage. For instance, when they first meet during a crisis situation, they both see how the other is handling the danger. Harry is using his magic to fend off dark creatures, and Fury is using his high - tech gadgets. After the initial encounter, they start to communicate more, sharing their different worldviews.
He would be much more aggressive in combat. With Ares as his father, he'd have a natural warrior instinct. He might not shy away from a fight like the original Harry. For example, he could be the first to charge into a battle against Death Eaters.
If Harry Potter were raised by Nick Fury, it would be a very different story. First of all, Harry's upbringing would be much more militaristic. Fury would instill in him a sense of discipline and a no - nonsense attitude. Harry would likely be more secretive about his magic, perhaps only using it when necessary for a mission. He might also have a team of magical and non - magical allies, similar to the Avengers, to help him fight against Voldemort and his Death Eaters. His Hogwarts experience would be unique too. He might not be as trusting of the school's authorities as he was in the original story, and would instead rely more on his own instincts and training from Fury.
He would be more physically capable. Natasha's training would make him better at hand - to - hand combat compared to the original Harry. He might also be more confident in dangerous situations.
There might be. Fanfiction writers have a great deal of creativity and often come up with the most unusual pairings. Since both Harry Potter and Nick Fury are popular characters, some writer might have thought it would be interesting to create a story where they are in a relationship like being husbands. But it's not a common or mainstream fanfiction concept.