The theme of loyalty is often explored. There's her loyalty to her family versus her new - found loyalty to Harry. And then there's the theme of acceptance. Harry and his friends might be hesitant to accept Draco's sister at first, and she has to prove herself worthy of their trust. These themes add depth to the fanfictions and make them really interesting to read.
One great fanfiction in this category is 'The Unlikely Bond'. It shows how Draco's sister, despite her family's views, gradually forms a connection with Harry. It's a slow - burn story that really delves into the characters' emotions and the complex situation at Hogwarts.
Writers often start with an initial encounter that's filled with tension. Maybe Draco makes a snide comment to the sister because she's related to Harry, and she fires back. But then, over time, they might find themselves in a situation where they have to work together, like on a school project. This forced proximity makes them see each other in a new light. They start to notice little things about each other, like Draco's hidden love for art and the sister's talent for Herbology.
One possible plot could be that Draco's older sister, let's call her Astoria for example, starts to develop feelings for Harry while trying to bridge the gap between the Slytherin and Gryffindor houses. She might see the good in Harry that Draco refuses to acknowledge at first. This could lead to a series of events where she has to choose between her family's traditional views and her new - found respect and love for Harry.
Well, it would likely make their relationship much more complex. Instead of the typical rivalry, there could be a sense of family obligation. Draco might feel protective of 'her' in a different way than he would a male Harry. He might be torn between his family's views and this new connection to Harry.
Well, it might result in a friendship that neither of them expected. Harry, by taking Draco's hand, could be showing a sign of forgiveness or a willingness to bridge the gap. This could make Draco re - evaluate his own actions and beliefs. They might end up working together to solve some of the mysteries in the wizarding world that are bigger than their house rivalries. It could also cause a stir among their friends, with some being supportive and others being completely against this new - found connection.
Their relationship might start because of a shared interest in a particular subject, like Defense Against the Dark Arts. Maybe they both have unique insights on a certain spell or dark creature, and that sparks a conversation which leads to them getting to know each other better.
One possible plot development is that they form an alliance against a common enemy. Maybe there's a new dark force emerging in the wizarding world, and their combined skills and knowledge are needed. Another is that they start to explore their feelings for each other, which could be more than just friendship. It could be the start of a romantic relationship, which would be a huge change from their traditional enmity.
She might be portrayed as a bit of an outcast within her own family. Maybe she's not as interested in the pure - blood supremacy ideals as the rest of the Malfoys. She could be more empathetic and kind - hearted, often sneaking off to help those less fortunate in the wizarding world, like the house - elves. She's constantly walking a fine line between her family's expectations and her own moral compass.
One popular 'Draco's sister' Harry Potter fanfiction is 'The Malfoy Heir' which delves into the story of Draco's sister navigating the complex wizarding world, her relationships with the other characters, and how she copes with the family's expectations. It has an interesting plot that twists and turns as she finds herself in the middle of the battle between good and evil.