Sirius would likely become more authoritative. He was always a bit of a rebel, but taking over the wizarding world would require him to be more in control. He might lose some of his carefree nature. For example, he would have to make tough decisions about laws and regulations, which could make him seem more serious.
His loyalty would be even more pronounced. He would want to protect the wizarding world that he now rules. He would surround himself with people he trusts, like his old friends. His sense of justice would also be a major part of his rule. He would ensure that those who were wronged in the past, like the half - bloods and Muggle - borns, get equal treatment. However, he might also become more isolated as he has to deal with the power and the politics that come with ruling. He might not be able to be as open and friendly as he was before, as he has to maintain an air of leadership.
It would likely make her more self - assured. Sirius would constantly be there to support her and tell her she's capable. This could lead to Hermione being even more outspoken and confident. Instead of just arguing her points in the classroom, she might start challenging the wizarding world's old - fashioned ideas more publicly. Also, she might develop a stronger sense of loyalty to those she cares about, like Sirius, similar to the loyalty he showed to his friends.
In this fanfiction, Sirius Black could take over the wizarding world by uniting the different houses at Hogwarts. He realizes that the division between the houses has caused a lot of problems in the wizarding community. So, he starts at Hogwarts, creating a new curriculum that encourages cooperation between the houses. This new unity gives him a strong base of support. He then uses this support to challenge the current leadership of the wizarding world. He might also discover some hidden secrets about the founders of Hogwarts that give him an edge in his takeover. For instance, he could find a powerful magic artifact left by one of the founders that helps him gain the trust of the wizarding population.
His relationship could become strained. The wizarding world might be suspicious of him due to his vampire connection. They could fear that he might bring vampire - like behaviors or threats into their midst.
Naruto could become more curious. A different world means new things to explore, new cultures, and new powers. He would be eager to learn about everything, which could make him seem more inquisitive than he already is. He might start asking a lot of questions to understand how this new world functions.
Dumbledore could gain new insights. Fanfiction might explore the social aspects of the wizarding world in ways he hadn't considered. Maybe there are stories about how the different houses interact in a more complex way than he thought. This could make him reevaluate his own views on the unity or division within Hogwarts.
His view could become more open - minded. He'd realize there are other ways to approach the supernatural world. For example, the way the hunters in Supernatural use weapons instead of wands might make him think about alternative forms of magic defense.
Her personality might not change drastically. Sirius was always rebellious and brave, and as a girl, she would likely still be those things. However, she might become more empathetic as she experiences the world from a different perspective. Maybe she would be more in tune with the emotions of others around her.
He might become more outgoing. In the Naruto world, the culture is different from the rather formal and often secluded wizarding world. Harry would be exposed to a more boisterous and open - minded society, so he could become more extroverted and less reserved.
If Naruto were on Team 8 in fanfiction, his personality could develop in several ways. He may become more empathetic as he gets to know his new teammates better. Hinata's shyness might make him more sensitive to others' feelings, and he would try to encourage her more. Also, being around Shino's quiet and methodical nature could make him more reflective. He might start thinking more about the consequences of his actions before acting, which is a big change from his usual impulsive self. He could also become more competitive in a different way, trying to prove himself not just in combat but also in the more specialized skills that Team 8 values, like tracking and espionage.
If Voldemort won the war in fanfiction, the wizarding world would experience a total transformation. First, the Ministry of Magic would be under his complete control. His Death Eaters would be in charge of all the important positions. The concept of justice would be warped, and any form of opposition would be brutally suppressed. The wizarding economy would likely suffer too as Voldemort's focus would be on power and domination rather than development. Also, the relationships between different magical creatures would be disrupted as Voldemort has no respect for any form of life other than his own pure - blood ideology.