Well, Harry's character would grow in new directions. His self - discovery journey would be more about understanding his Snape - related heritage. He might be more secretive like Snape and have a different approach to friendships. His anger towards Snape in the original story would turn into a more complex mix of emotions, including confusion and a sense of betrayal at not knowing the truth earlier. This would also affect how he deals with the challenges against Voldemort, as his motivation would be tied to this new family revelation.
Snape's character changes in his relationship with others too. He becomes more involved with the Hogwarts community as he is now responsible for Harry. He might start to collaborate more with other teachers, like McGonagall, who he previously had a rather cold relationship with. His attitude towards the students also changes as he realizes that they are just kids trying to find their way, much like Harry. This is a big shift from his usual strict and often unforgiving self.
There are many fanfictions that explore Severus Snape's father. Some might depict him as a cruel man who had a negative impact on Snape's childhood. In some fanfictions, he could be an absent figure, which might have contributed to Snape's rather solitary and often bitter nature.
The blood adoption might make Harry more introspective. He has always been a bit impulsive, but with Snape's influence through the adoption, he may start to think more before acting. For example, he might analyze situations from different angles like Snape used to.
In fanfiction, anything can be reimagined. It could be possible through creative plot devices like a hidden relationship between Snape and Lily Potter before she was with James. Maybe there was a secret encounter that led to Harry's conception, and the truth was hidden all along.
He would become more cautious. Harry has faced so much danger in his life, and as a father, he would do everything to keep his children safe. So, he might be a bit overprotective at times.
This changes the story dynamics massively. In the original story, Snape was a mystery and an antagonist of sorts to Harry. But if he's Harry's father in a fanfic, it means that Snape's actions were not just out of some old grudge or loyalty to Dumbledore. His protectiveness towards Harry could be seen as a fatherly instinct. It also changes how we view Lily's relationship with both Snape and James. Maybe there was more to the story than we knew, and Snape had a closer connection to Harry all along that was hidden for some reason.
In some fanfictions, Severus Snape being Harry Potter's father is a radical but interesting concept. It often involves re - imagining the relationship between Lily and Snape. Maybe there was a hidden, deeper connection between them that led to Harry's birth. This changes the whole dynamic of the story as Snape would then have a more personal stake in Harry's life from the start.
Well, if Snape were Harry's dad in this fanfiction, Harry's isolation might take on a different tone. He could be more conflicted. Knowing Snape is his father, a man he had such a tumultuous relationship with before, would make him question his own identity. He might be more withdrawn as he tries to come to terms with this new family truth, and his relationships with his friends might become strained as he feels they couldn't possibly understand what he's going through.
Snape's personality would likely soften. He'd have to be more patient and understanding. Instead of just being the strict and often sarcastic Potions master, he'd become more nurturing. He'd still have his sharp edges, but around Harry, he'd show more kindness and care as he takes on the role of a guardian.
Yes, there are such fanfictions in the Harry Potter fandom. Some fans like to explore this alternative family relationship through their creative writing.