Well, it depends. While it's not the most mainstream theme in Harry Potter fanfiction, there are some writers who might be interested in this rather unorthodox relationship. They might use it to add a new twist to the story, perhaps delving into Snape's complex feelings towards Harry in a very different way than in the original books.
One possible fanfiction could be about Snape secretly having a pet Kneazle. In this story, Harry Potter might accidentally discover Snape's soft side as he cares for the Kneazle. Maybe the Kneazle gets into some trouble in Hogwarts and Harry and Snape have to work together to save it, which would be a very interesting plot twist as they usually don't get along.
Well, in some fanfictions with such a premise, there could be plots around how Harry's relationship with Snape develops in this rather unusual dynamic. It might explore themes of trust and growth. However, it really depends on the author's take on it.
Perhaps Snape, in a moment of weakness or out of some deep - seated sense of responsibility, decides to protect Harry in an extreme way. He treats Harry like a pet in that he provides for all of Harry's needs but also restricts his freedom. This could lead to a lot of internal conflict for Harry, who is used to being independent. Meanwhile, Snape has to deal with the other characters in the wizarding world who might not understand his motives for treating Harry this way.
For Harry, he may become more patient and obedient as he adapts to the role. He might also gain a new perspective on Snape. Snape, on the other hand, could become more protective and perhaps less harsh in his exterior.
I don't think it's a very common fanfic genre. In the Harry Potter universe, the relationship between Harry and Snape is complex, but the idea of Harry being Snape's 'pet' is rather strange. Most fanfic writers are more interested in exploring their antagonistic relationship or Snape's role in protecting Harry secretly, rather than this rather odd 'pet' concept.
Their relationship could start off rocky. Snape might be cold and distant at first, seeing Harry as just another responsibility. But as he gets to know Harry in his pet form, he might start to notice Harry's unique qualities and grow fond of him. For example, Harry could show loyalty and courage even in his pet state, which would gradually change Snape's view.
In some fanfictions, Snape and Harry might have a grudging truce during Christmas. For example, Snape could be forced to supervise Harry's Christmas activities at Hogwarts, leading to some tense but interesting interactions. Harry might be secretly trying to figure out Snape's true nature during this time.
Yes, there are likely some fanfictions with this concept. The Harry Potter fandom is very creative, and writers often come up with unique relationships between characters. Some might explore the idea of Snape being Harry's brother to add new layers of drama, mystery, and character development to the story.
There might be. Fanfiction is a vast world where authors can play around with different ideas. This particular concept of Harry being Snape's nephew could add a whole new layer of complexity to the story. For example, it could change the dynamic between Snape and Dumbledore, as Snape might be more protective of Harry due to their family connection. It also has the potential to rewrite many of the emotional moments in the original series.