It could lead to different alliances. Harry might form new friendships or partnerships that he wouldn't have in the original story. This could change the power dynamics in the wizarding world. For example, he might team up more with Hermione alone, and their relationship could develop in a different way, perhaps more romantically earlier since they don't have Ron as a buffer.
Well, it changes a lot. For one thing, the whole dynamic of Hogwarts would be different. Harry would be more alone without Ron by his side. He would have to find new allies and support systems, which would mean new friendships would form that were not in the original story.
Well, it changes everything. Without Harry, there's no 'Chosen One' to fight Voldemort. So, Voldemort would likely rule the wizarding world unopposed. The Hogwarts School might become a place that only teaches dark magic or is completely under Voldemort's control.
The relationships that Harry was supposed to form later in life, like his friendships with Ron and Hermione, would never happen. And the whole wizarding world would be different. Without Harry, there might not be someone to stand up to Voldemort in the same way. So, the power balance in the wizarding world would be completely shifted. Also, the mystery around Harry's scar and his connection to Voldemort would be left unresolved in a way that leaves the story with a sense of incompleteness.
It can divide the fandom. Some fans who love the original dynamic between Harry and Ron might be disappointed or even angry at this deviation. They might see it as ruining the essence of their friendship.
The fight against Voldemort would be very different. Since Hogwarts is a key place in the battle against the Dark Lord, if Harry isn't there, the defenses of Hogwarts might not be set up in the same way. Also, he won't be trained by the professors, so his magical skills won't develop as they did in the original story. Without Harry at Hogwarts, the balance of power between good and evil in the wizarding world could shift in a very unexpected way.
The relationships in the story are affected too. Harry's relationship with Dumbledore would become strained. Other characters who are loyal to Dumbledore might also turn against Harry. And Harry might form new alliances with characters who also have doubts about Dumbledore's leadership in this fanfiction.
Well, it completely flips the script. Instead of being the hero, Harry is now a criminal. This changes the way we view the other characters too. For example, the relationship between Harry and Dumbledore might be seen in a different light. Dumbledore's guidance might be seen as either misguiding Harry into criminal behavior or as an attempt to control a potential criminal.
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.
The 'snape is harry's father fanfiction' can transform the entire narrative. Harry's identity and self - discovery journey would be on a whole new path. He might not have grown up with the Dursleys if Snape was his father. Snape would have likely had different motives for his actions throughout Harry's years at Hogwarts. The relationships with his friends, like Ron and Hermione, could also be affected as they might view Harry's new family connection in different ways. It basically takes the core of the Harry Potter story and gives it a huge twist.
This type of fanfiction can also change the character interactions. Friends of Harry and Ginny may be forced to take sides or try to reconcile them. For instance, Hermione might be in the middle, trying to figure out what went wrong and how to fix it. It can make the story more about relationship drama rather than the typical Harry Potter adventures against dark forces.