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.
In a 'harry potter is brightburn fanfiction', characters like Dumbledore would have a different role. He might not be as much of a guiding light for Harry. Instead, he could be more of an enigma, perhaps having his own hidden motives that are not so clearly good. And Voldemort could be even more terrifying, with his dark magic taking on new and more menacing forms inspired by Brightburn's dark elements.
He'd probably be more morally ambiguous. Growing up as Crowley's son, he might not have the same clear - cut sense of right and wrong as the original Harry. He could be more cunning and less hesitant to use underhanded tactics if necessary.
The plot would change a great deal. For one, Harry would be much more powerful physically. So when facing Voldemort, he could use Thor's strength in combat, not just rely on magic. He might be able to take on Death Eaters more easily.
Harry would probably be more attuned to dark magic. His upbringing by Satan would expose him to different forms of magic and he would have a different understanding of power. He might be more ruthless in achieving his goals and less concerned about the consequences for others. For example, in the original series, Harry was always worried about the safety of his friends, but in this fanfiction, he might use his friends as pawns if it served his purpose.
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.
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.
The Dursleys would likely be out of the picture, or at least not as significant. Instead, Harry might be under the care of some dark wizard or witch in Knockturn Alley. His Hogwarts professors would probably view him with more suspicion. His friends, if he made any at Hogwarts from the more 'good' side, would be initially very wary of him.
For Harry, reading fanfiction could make him realize the many different ways people view his life and struggles. It might give him a new sense of how much his story has impacted others. Hermione might gain a broader view of the creativity of the wizarding community outside of the academic realm. She'd see that there are many interpretations of their world.
In this fanfiction, Hermione would be greatly influenced. She would be eager to explore the Australian magical libraries and discover new spells and potions. Ron might gain a love for Australian food, which could change his physique a bit. The kids would be more open - minded, as they are exposed to a new and diverse magical culture. They might also become more independent, as the Australian wizarding community could have a different parenting style.
If Harry Potter was a jinchuuriki in a fanfiction, his identity would be more complex. He would not only be a wizard but also a host to a powerful entity. His relationships with others would shift. Some might fear his new power, while others might try to use him. His journey to defeat Voldemort would take on a new dimension as he has to learn to control and use the power of the jinchuuriki. And his battles would be different, with new abilities and tactics that combine wizardry and jinchuuriki powers.
The romances in the Harry Potter series would be non - existent. The slow - burning love between Ron and Hermione or the unrequited love of Snape for Lily would be completely absent. Instead, interactions would be more matter - of - fact. For instance, if Ron and Hermione were to go to the Yule Ball together, it would be just for the sake of following the social norms of Hogwarts, not because of any budding feelings.