He would become more of a hybrid between a wizard and a Shinigami - like character. His confidence might increase as he masters the Zanpakuto, since it gives him an edge in combat. He could also become more in - tune with a different type of spiritual energy, which might make him seem a bit more detached from his normal wizarding friends at first.
Harry's character would likely develop a sense of honor and discipline similar to what is often associated with Zanpakuto users. He would have to respect the power of the weapon and follow certain rules. This could make him more of a lone wolf in some ways, as he delves deeper into understanding and using the Zanpakuto. He might also start to question some of the traditional ways of the wizarding world, seeing new possibilities with the power of the Zanpakuto.
He'd become more disciplined. The military environment would force him to follow strict rules, which is different from the somewhat loose rules in Hogwarts. His sense of responsibility would also grow as he'd be responsible for his comrades' lives.
Harry would likely have a different sense of self - worth. Knowing he is the son of a powerful underwater hero like Aquaman, he would carry himself with more pride. He might also be more in tune with his emotions, as the ocean is often associated with depth of feeling. And his magical abilities could be enhanced in ways related to water, like creating more powerful water - based spells. He could also be more of a loner, as his unique heritage might make it hard for others to fully understand him.
Harry would probably be more physically fit and combat - ready. Sasuke would train him in ninja ways, so he'd be better at hand - to - hand combat compared to the regular Harry. His approach to facing enemies would be more direct and less about relying solely on magic. He might also be more independent, as Sasuke is not one to encourage over - dependence on others.
He'd be tougher. Hela's not one to coddle, so Harry would have to grow up fast.
Harry would be less socialized in the typical human way. He might not understand things like friendship the same way. He could be more territorial and protective. His magic might also be affected. He might use it more instinctively, like using a spell to protect his 'territory' which in this case could be the area where his wolf pack lives.
He would probably be more in tune with nature. The Inuzuka's lifestyle would make him more aware of the natural world around him. He might be less bookish than in the original and more hands - on with physical activities like running and training with the clan.
He'd likely be much more morally ambiguous. Harry would probably have less regard for the rules and traditions of the wizarding world.
Harry Potter's character would transform in several ways if he joined the police in fanfiction. Firstly, he would become more aware of the Muggle society and its problems. His view of the world would expand beyond the wizarding realm. He would also learn the importance of teamwork in a different context. In the wizarding world, he had his friends from Hogwarts, but in the police, he'd be working with a diverse group of people with different skills and backgrounds. This would make him more adaptable and open - minded. His sense of right and wrong, which was already strong, would be further refined as he deals with the complex legal and ethical issues in police work.
He would be more powerful. Harry would likely have a sense of grandeur and a different view of his place in the world. His confidence might soar as he realizes he has such a powerful lineage.
He would become much more aggressive. Harry is usually a calm and strategic fighter, but as the Hulk, he would rely more on brute force and his first instinct would be to attack rather than think through a plan.