There are some. However, the idea of them as siblings is a bit of a departure from the original series. But in fanfiction, creativity knows no bounds. Some stories might focus on how their shared traits, like their intelligence and courage, are enhanced by their newfound sibling connection. It could also lead to some heartwarming moments, like when they celebrate holidays together as a family for the first time.
Well, loyalty is a big one. Since they are siblings in these fanfictions, their loyalty to each other becomes even more pronounced. They will stand by each other no matter what. Another theme could be the exploration of their family heritage. Maybe they find out they are part of an ancient magical family. And of course, there's the theme of growing up together, facing the challenges of Hogwarts and the wizarding world as siblings.
One possible fanfiction plot could be that with Hermione being Harry's sister, it adds a new layer of family drama to the relationship between Hermione and Draco. Maybe Draco has to face his own prejudices in a different way because she's not just a Muggle - born witch but also related to 'The Boy Who Lived'.
Well, if Hermione was Harry's sister, it would likely impact the way they approach challenges and adventures. They might have more shared family concerns and a deeper sense of loyalty. Also, their interactions with other characters could be different as their family status has changed.
A possible storyline is them teaming up to solve a mystery related to their family. Maybe their parents were involved in something before they were born, and now Draco and Hermione have to follow the clues. In some fanfictions, they find that their family has a connection to an ancient magic. They start to learn about their family's past together, and along the way, they overcome their initial differences. Draco's Slytherin cunning and Hermione's Gryffindor bravery combine to make them a formidable duo when it comes to unravelling the secrets.
If Hermione were Harry's sister, Ron might be a bit more intimidated at first. He has always had a crush on Hermione, and this new connection could make him feel like he has to be on his best behavior. However, as time goes on, he would probably get used to it and their relationship could become even stronger, as Ron would see Hermione as an even more important part of his life through her connection to Harry.
Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own or Fanfiction.net. Just search for the exact phrase 'Harry is Hermione's older brother' in their search bars and you'll likely find a variety of stories with different plotlines and interpretations.
Hermione would likely become more understanding of Draco's situation. In the original stories, they were enemies. But as siblings, she would see the pressures he was under from his family. This could lead to her being more empathetic. Draco, on the other hand, would probably have to tone down his arrogance. With Hermione as his sister, he'd be constantly challenged. He might start to show more humility, like in one fanfiction where he apologized to Harry and Ron for his past behavior because Hermione made him realize how wrong he was.
Well, it makes their relationship even more complex. Ron might feel a bit left out at first because Harry and Hermione have this new, deeper connection. But then he realizes that it doesn't change their friendship. Harry and Hermione, on the other hand, might be more protective of each other than before.
One plot idea could be that Hermione discovers she's Harry's sister early on. This changes their dynamic at Hogwarts. They might have a stronger bond and work even more closely together to fight Voldemort. Another idea is that Hermione's family has been hiding this fact from her all along, and she has to come to terms with her new identity while still dealing with the challenges of school.