If Harry were the son of Hela, his character would undergo a significant transformation. His entire understanding of magic and his place in the wizarding world would be shaken. He'd no longer be just the Boy Who Lived, but the son of a powerful and feared Norse goddess. This new identity would bring out a more assertive side of him. He'd be more willing to question the established rules and authorities in the wizarding world. His personality would become a blend of his original Gryffindor courage and Hela's more unyielding and powerful nature. He might also develop a new set of skills related to Hela's powers, which would change how he approaches challenges and threats in the wizarding world.
He'd be tougher. Hela's not one to coddle, so Harry would have to grow up fast.
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.
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 be much more physically powerful. Instead of relying just on magic, he could use his Saiyan strength to solve problems. For instance, he might be able to break through magically locked doors with his bare hands.
He would likely be more conflicted. Harry was always a morally upright character, but with Thanos as his father, he'd have to battle inner demons. He might be more powerful physically and have a darker side to his personality that he constantly has to keep in check.
He would likely become more conflicted. Harry, who was always on the side of good, would now have to deal with this dark lineage. He might be more withdrawn as he tries to come to terms with it.
He would probably be more in tune with nature. Instead of just having a connection to Hedwig, he might be able to communicate with all kinds of animals. So he could be more of a naturalist wizard.
He would probably be more otherworldly. Harry might have an air of mystery around him that the original Harry didn't have. His actions could be more guided by a sense of divine purpose.
If Harry was the son of Loki, his confidence would likely take a different turn. Instead of the somewhat hesitant confidence he has in the original series, he might have a more brash and calculated confidence. He would be more aware of his potential power and be more willing to take risks. His relationships with his friends would also change. Some might be drawn to his new, more exciting and dangerous side, while others might be put off by the Loki - like traits emerging in him. He would have to learn to manage these new aspects of his character while still maintaining his core identity as Harry Potter.
He might be more self - reflective. Since Edmund had his own character arc of learning from his mistakes, Harry could inherit that trait. He would be quicker to admit when he's wrong and more likely to learn from his experiences.