Well, in this fanfic situation, it would make Snape's sacrifice at the end seem even more tragic. In the original, he sacrificed himself for the greater good and out of his love for Lily. But if Harry was his son, he would be dying not just for the wizarding world but also for his own flesh and blood without ever having truly known. This would add a whole new layer of pathos to the story.
If Snape never knew Harry was his son in this fanfic, it would completely change the dynamic between them. Snape's constant animosity towards Harry in the original series was partly due to his love - hate relationship with James Potter. But if Harry was his son, his actions would be more conflicted. He might still be harsh on Harry to hide his true feelings, but there would be moments of involuntary protectiveness.
Well, if everyone found out Harry was Snape's son, it would completely shatter the existing relationships. For one, Harry's relationship with the Dursleys might be even more strained as they already dislike him, and this new revelation could make them feel even more threatened. His relationship with Ron and Hermione would also be tested. They might be confused and even a bit betrayed at first. Hermione, being the logical one, would probably try to find out how this could be possible. Ron, on the other hand, might have a more emotional reaction. And as for Snape himself, his whole attitude towards Harry would have to change drastically. He couldn't keep up the pretense of hating Harry when it turns out he's his son. It would also change the way the wizarding world views Harry. Some might be more sympathetic, while others might be suspicious of Snape's motives all along.
The story would be very different. Without being a Death Eater, Snape's role and relationships with other characters would likely shift dramatically.
Dumbledore's reaction would be very complex. He was always aware of many secrets. If he knew about this, he might have tried to keep it hidden for some greater purpose. But when it was revealed, he would likely have a look of both regret and understanding. He might regret not having told Snape or Harry, but also understand why it was a difficult situation to disclose. As for Voldemort, he would probably see it as a weakness in Snape and try to use it against him in some way.
Well, if Harry Potter becomes a Power Ranger fan, the story could change in many ways. Maybe he starts to incorporate some of the Power Ranger's fighting styles into his duels at Hogwarts. He might even dream of having Ranger powers to fight Voldemort.
Harry in this fanfiction might be a lot more complex. His identity is no longer that of the Boy Who Lived in the traditional sense. He has to come to terms with the fact that his parents are two very different and controversial figures. He may become more of an outcast, even among his friends at Hogwarts. His sense of right and wrong could be more blurred, as he has the influence of Bellatrix's dark ways and Snape's own morally ambiguous actions. He might be constantly questioning his own nature and whether he is destined to follow a path of good or evil.
The whole dynamic of the fight against Voldemort would shift. If Harry were Snape's son, Snape's loyalty and actions throughout the series would be re - evaluated. Harry might have access to different knowledge and skills that Snape could pass on. His connection to the Dark Arts might be more nuanced. Also, the way the other Hogwarts professors treat Harry would be different. They might be more cautious or more expectant of him, given his new family connection.
Well, if Snape turns Harry into a vampire in fanfiction, it would completely change the dynamic. Harry would have to deal with new instincts like the thirst for blood. His relationships would be strained as his friends might be scared of him. Also, his role as the 'Chosen One' would be redefined as he's now a different kind of being with different needs and abilities. He might have to struggle between his human side and his new vampire nature.
In this fanfiction concept, the story would be turned on its head. The whole mystery around Harry's parents and his connection to Snape would be reimagined. Their shared heritage as twins could lead to new magical abilities that they discover together. The Hogwarts houses might even treat them differently. For instance, Snape being a Slytherin and Harry being a Gryffindor in the original, but as twins, there could be a whole new dynamic within the houses. And the final battle with Voldemort could be fought in a completely different way with their combined strength and new - found relationship.
Well, if Hermione and Blaise were siblings, Hermione might have had access to different knowledge and resources. Blaise comes from a different social circle in the wizarding world. This could have influenced Hermione's studies. Maybe she would have been exposed to some Slytherin - favored magic earlier. In terms of the overall plot, the conflict between the houses might have been less intense. Since Hermione has friends in Gryffindor and a brother in Slytherin, she could have played a greater role in promoting unity among the students. And Blaise himself might have changed. With Hermione as his sister, he might not be as cold towards the Gryffindors as he was in the original story.
The use of time travel in Harry Potter fanfic is really fascinating. In some fanfics, time travel allows characters to interact with previous generations. This can lead to a whole new set of relationships and revelations. For example, if Harry were to travel back in time and meet his parents as students at Hogwarts, he could learn things about them that he never knew before. This would not only change his perception of his parents but also potentially affect his own identity. It could also lead to changes in the way he approaches the fight against Voldemort, as he now has a deeper understanding of his family's past and the roots of the wizarding world's problems.