One common theme is the struggle with identity. Since they have different upbringings, they have to figure out how to be siblings while still being true to themselves. Another theme is family loyalty. They often have to choose between their new - found family bond and their old allegiances. And of course, there's the theme of redemption, especially for Draco as he has to reevaluate his actions in light of this new relationship.
Well, 'Brothers in Magic' is a fanfic that I like. It begins with the revelation that Harry and Draco are siblings and then goes on to show how they navigate through the political intrigues of the wizarding world together. Another interesting one is 'Siblinghood Unveiled'. It shows how they come to terms with their new - found relationship and how it affects their friends and enemies alike. 'The Potter - Malfoy Sibling Connection' is also worth reading as it shows their journey of self - discovery as siblings.
A common plotline is how their friendship or rather new - found brotherhood affects the Hogwarts houses. Since Draco is a Slytherin and Harry a Gryffindor, their bond could start to break down the long - standing rivalries between the houses. They might work together to create a more united Hogwarts. Additionally, their relationship could change how they view the wizarding war. Instead of being on opposing sides as they initially were in the original story, as siblings they might try to find a more peaceful solution to the conflict.
If Hermione and Draco were siblings in fanfiction, it would completely turn the original story on its head. For one, Hermione's Gryffindor nature and Draco's Slytherin one would create a really interesting family dynamic. Their parents must have had a very complex relationship for this to be possible. It could lead to Hermione having a different view of the wizarding world from the start. Instead of being a Muggle - born advocate in the way she was, she might have had some internal conflict due to her Slytherin - influenced family ties. And Draco might not be as much of a bully as he was originally, or at least he would have a different kind of relationship with Harry, Ron, and Hermione.
One interesting plotline could be them growing up together and having to hide their relationship from the wizarding world because of the implications it would have on the existing power dynamics. Another could be them using their combined skills, Hermione's intelligence, Harry's courage, and Draco's knowledge of the pure - blood society, to fight a new dark force in the wizarding world.
Harry might become more cautious. With Draco as his brother, he'd be exposed to Slytherin - like thinking more often. He could start to weigh his actions more carefully and think about the long - term consequences. Draco, on the other hand, might become a bit more empathetic. Growing up with Harry, he'd see the Gryffindor values up close and might start to care more about others.
One common theme is family loyalty. In many 'draco siblings fanfiction', the siblings will stick together through thick and thin, whether it's dealing with the family's dark past or facing new challenges at Hogwarts. Another theme is the contrast in personalities. Draco might be more well - known for his haughty side, while his siblings could have different traits, and the fanfiction often explores how these differences play out in their relationships.
Well, in fanfiction, the author has the creative freedom to rewrite the story's basic facts. Maybe it could be possible through some magical spell gone wrong in their parents' past that somehow intertwined their families in a way that made them siblings. It's a very different take from the original where they are just classmates and, in Draco's case, an antagonist.
I really liked 'Sibling Rivalry in the Wizarding World'. In this fanfic, Hermione and Draco as siblings have some intense moments. Their different personalities lead to some great plotlines. For example, Hermione's studious nature clashes with Draco's more laid - back and sometimes snobbish attitude, but at the end of the day, they still have that sibling bond that holds them together.
Another theme is the idea of family loyalty. Despite their differences, they are siblings. So, they often have to defend each other against others at Hogwarts. In some fanfictions, they might be in a situation where Draco is being bullied by other Slytherins for having a Muggle - born sister, and he has to decide whether to side with his house or his sister. And Hermione might have to deal with her Gryffindor friends not understanding why she's related to a Malfoy.