He'd be more in tune with his instincts. Instead of relying on the social norms of the wizarding world, he'd follow his gut feelings more. For example, in a dangerous situation, he might act like a wolf in a pack, assessing threats quickly and instinctively.
Harry would be more territorial. Goblins are known to be possessive of their spaces and belongings. So, Harry would probably be very protective of his personal space and things. Also, his sense of justice might be different. Goblins have their own rules and laws, and growing up with them, Harry would view right and wrong from a goblin - centered perspective rather than a wizard - centered one.
He'd be more animalistic. He might move on all fours more often and be more comfortable in the wild. His communication skills could be more primal, using grunts and gestures at first.
He would be more feral. The Xenomorphs' aggressive and survival - based nature would likely rub off on Harry. He'd be less hesitant in a fight compared to the original Harry, and more likely to use brute force along with his magic.
He'd be more likely to be initially haughty. Since the Malfoys are known for their pride in their pure - blood status. But he might also grow to be more cunning as he'd be in an environment where manipulation is sometimes used.
He'd be more aggressive. Greyback's influence would make Harry less hesitant in a fight. He'd be more likely to use brute force rather than relying on spells all the time.
He would be more refined. Royal upbringing would instill in him a sense of propriety and elegance that he lacks in the original story.
Harry would have a different view of leadership. Instead of just being a hero who reacts to threats, he would be more proactive in shaping the wizarding world. Lelouch's influence would make him see the importance of having a vision for the future and using all means necessary to achieve it. He would be more strategic in his approach to fighting against Voldemort and the Death Eaters, perhaps even trying to turn some of them to his side rather than just fighting them head - on.
Harry's personality would be much different. Mileena is a complex and often brutal character. Harry, under her care, would likely be less trusting and more self - reliant. He might not be as open - hearted as the original Harry. His sense of humor could also be darker, influenced by Mileena's world where there is a lot of death and struggle.
His personality would be much more bold and fearless. Deadpool's influence would make Harry less afraid of taking risks and more willing to jump into dangerous situations without hesitation. He would also be more adaptable as he would have grown up in a constantly changing and chaotic environment created by Deadpool.
He'd be more aggressive. Gangs often have a tough and sometimes violent culture, so Harry might be quicker to anger and use force.