In the original story, Harry often felt alone in his battles. But with an OC as his brother, there would be a constant ally. The OC could have different relationships with the teachers too. Suppose the OC has a particular interest in potions like Snape. This could lead to a different kind of mentorship and perhaps change Snape's view of the Potter family. And when it comes to the final battles, the OC could bring in additional magical artifacts or allies that were not part of the original story, completely changing the way the fight against Voldemort unfolds.
In this fanfiction scenario, Harry Potter might change in several ways. His perspective on life and death could shift. Knowing that his brother has some sort of'reborn' aspect could make him question the finality of death more. He could also become more empathetic towards those who have lost loved ones. Emotionally, he might be more stable as he has a family connection now. This new bond could also make him more willing to take risks in the name of protecting his brother, which is a different kind of motivation compared to just fighting Voldemort for the sake of the wizarding world. Additionally, he may develop new magical abilities or skills as a result of the influence of his brother's unique situation.
Harry Potter reborn as a Jedi would have a different upbringing. Instead of growing up with the Dursleys, he'd be in the Jedi Temple. This would change his perspective. He'd be more focused on the balance of the Force rather than the battle between good wizards and bad wizards. His relationships would be different too. He'd form bonds with other Jedi, and his loyalty would be towards the Jedi Order. His character would be less about the magic of spells and more about the power of the Force, but his core values of bravery and standing up for what's right would remain.
He would likely become more hardened. In the Harry Potter world, he had his friends and Hogwarts as a sort of safe haven. As a Stark, he'd be in a much harsher world. He'd probably be more aggressive in protecting his family and territory.
If reborn into Marvel fanfiction, Harry Potter's character would experience significant changes. His sense of self - reliance would be tested as he'd be surrounded by powerful superheroes. He'd have to learn to rely on others more, which could make him less solitary in his decision - making. His view of power would also expand. In Hogwarts, magic was the main form of power, but in Marvel, there are so many different sources of power like super - soldier serum, gamma radiation, and alien technology. This would make him more curious and eager to learn about different forms of power and how to use them effectively. His moral compass might also shift slightly as he'd encounter different ethical dilemmas in the Marvel universe that are not the same as those in the wizarding world.
The characters would change a great deal. Harry, for example, might be less of the pure - hearted hero. He could have a more cynical view of the world around him, similar to Brightburn. Hermione might be more distrustful of Harry's new - found darker tendencies. Ron could be more afraid of Harry and his powers, which would strain their friendship.
The plot could change drastically. If Harry is reborn, his entire backstory and origin would be different. This would mean that the events leading up to his fight against Voldemort would be altered. Maybe in this reborn version, Voldemort never became as powerful as he did in the original story because Harry was reborn with some sort of special protection that weakened Voldemort from the start.
His personality would likely be more cold and calculating. He'd be used to getting his way through underhanded means taught by the villains.
He'd be more adaptable. Quarians live in a different way than wizards, so Harry would learn to be flexible in new situations.
It changes the story a great deal. Firstly, the gender change means different social expectations within the wizarding world. Female characters often face different challenges and opportunities. Also, being reborn as a Black alters the power dynamics. The Blacks are an old and influential family, so she has a different kind of influence and access to resources. For example, she may have more influence in Slytherin house which was often associated with the Blacks.
It would change the focus. Instead of just following the main plot of fighting Voldemort, there would be more emphasis on preparation. For example, Harry might spend more time learning about how to protect Hogwarts from all - out destruction rather than just facing Voldemort directly.