He would be more disciplined. Soldiers are known for their strict discipline, and Harry would likely carry that into his daily life. He might be more punctual and organized in his tasks at Hogwarts.
Harry would probably be more confident in a fight. Since soldiers train for combat, they would have taught Harry how to handle himself in dangerous situations. So, when facing Death Eaters or other threats, he would be less likely to panic and more likely to take decisive action. He would also have a stronger sense of loyalty and comradeship, which could influence how he treats his friends at Hogwarts. For example, he might be more protective of them and expect the same level of loyalty in return.
His view of the wizarding world would be different. Growing up with soldiers, he would be exposed to a more regimented and perhaps harsher side of the magical community. This could make him more skeptical of the political and social structures in place. He might question the decisions made by the Ministry of Magic more often. In addition, his magical training would be more practical and less theoretical. He would focus on spells that are useful in combat and self - defense rather than those that are mainly for academic purposes. For instance, he would spend more time perfecting the Patronus Charm as a form of protection rather than just for an exam.
His social skills might be different too. Growing up with the Bones, he'd be around a different set of people. He might be more formal in his interactions, having been brought up in a family that has a certain reputation in the wizarding world. His sense of loyalty could be more towards the Bones family ideals at first, but as he discovers his own identity, he'd have to reconcile that with his true self and the relationships he forms outside of the Bones family.
Harry would probably be more reserved. Rosalie has a certain elegance and poise, and Harry might pick up on that. He may not be as quick to trust others as he was in the original story. Also, his view on magic could be different. Instead of seeing it just as a tool for good or for fun, he might see it as a way to protect himself and those he loves, similar to how Rosalie views her own vampiric abilities.
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'd likely be much more morally ambiguous. Harry would probably have less regard for the rules and traditions of the wizarding world.
He'd be more confident. Ophis's influence would make him less likely to doubt himself.
He'd be more brooding. Growing up with Dracula, he'd be exposed to a lot of dark and serious stuff, so he'd lose some of that innocent charm he has in the original series.
He'd be tougher. Logan's no - nonsense attitude would rub off on Harry. He'd be less likely to back down from a fight.
His personality would likely become more complex. He could be more withdrawn in some ways, as he might not fully trust others easily. Since Lucifer is associated with power and manipulation, Harry might also show tendencies to manipulate situations to his advantage. He would have a different view of loyalty, perhaps seeing it more as a tool for his own ends rather than an inherent virtue.