Well, it's fairly popular. Fanfiction often takes canon characters and twists their relationships. In this case, having Hermione as Draco's sister means there would be a lot of family drama and conflict. It's a great concept for exploring different aspects of their personalities. For example, Hermione's intelligence and Draco's pride could clash or work together in unexpected ways in family situations.
At first, they're likely to be shocked. But then they start to understand each other more. Draco might become more protective of Hermione, and Hermione might see a different side of Draco. They go from being rivals to having a family - like bond.
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.
It would be a huge shift. Hermione would probably have access to the Malfoy family secrets and resources. This could give the trio an edge in their adventures. Draco might also be more protective of Hermione, which would be an interesting twist. It could lead to some really complex family drama, especially considering the Malfoy family's standing in the wizarding world and Hermione's friendship with Harry, who is seen as an enemy by the Malfoys.
One common theme is family secrets. Since Hermione and Draco are from different families in the original series, there must be some big secrets if they are siblings in fanfiction. Another theme is identity crisis. Hermione might struggle with her new identity as a Malfoy. And of course, there's the theme of redemption. Draco could be influenced by Hermione's good nature and change for the better.
One popular theme could be the idea of redemption for Draco. In many fanfictions, he is shown to overcome his family's dark past and prejudice. Another theme might be the power of friendship or love that develops between Hermione and Draco, despite their initial differences. It could also explore how they navigate the complex wizarding world together, facing challenges from their respective houses and the general wizarding society.
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.
In a fanfiction with this theme, it could be set post - war. Draco and Hermione find themselves in a situation where they are on the run from some dark wizards who are after them for different reasons. During their escape, Hermione gets wet and cold. Draco, having a change of heart after the war, gives her his warm cloak. This act of kindness begins to break down the barriers between them, and they start to have deeper conversations, realizing they have more in common than they thought.
Perhaps there's a fanfiction where a powerful and dark wizard from outside the school is targeting Muggle - borns. Hermione, being a Muggle - born, is understandably afraid. Draco, who has always had a complex relationship with Hermione, is conflicted. He doesn't want to see her hurt because, deep down, he has feelings for her. He ends up using his Slytherin cunning to outwit the dark wizard and keep Hermione safe.
One reason could be the traditional rivalry from the original series. In the books, they are from different houses, Slytherin and Gryffindor, which have a long - standing feud. Fanfiction writers might play on this by having Draco be mean as a continuation of that in - built tension. Another aspect could be his family upbringing. The Malfoy family has certain pure - blood supremacist views, and Hermione being a Muggle - born might be a target for Draco's meanness in fanfictions.