She would probably be more sophisticated in her appearance and mannerisms. Growing up with the Malfoys, she would be used to a certain level of luxury and propriety. But internally, she would be constantly struggling with the moral implications of the Malfoy ideology. Her relationships with her friends, especially Harry and Ron, would be very different. There would be a lot more tension and mistrust at first, as they come from opposing 'worlds' in a sense. It would be really interesting to see how she would break free from the Malfoy - influenced mindset and find her true self again.
She would probably become more guarded and secretive. In the original story, Hermione is quite open with her friends about her thoughts and feelings. However, in the Malfoy household, she'd have to hide a lot of her true self. Her character development might see her becoming a master of deception, pretending to go along with the Malfoy's views while secretly working against them. This would add a whole new layer of complexity to her personality as she tries to balance her true self with the persona she has to present to the Malfoys.
In such a fanfiction, Hermione's character could become more rebellious. Sirius has a wild streak, and growing up with him might make Hermione less likely to blindly follow the rules. She could be more confident in taking risks and standing up for what she believes in.
Hermione would become more secretive. Since being an assassin requires a great deal of secrecy, she would have to keep her true identity and activities hidden from her friends. This could lead to a sense of isolation. Also, her decision - making process would change. Instead of thinking about the long - term academic or moral implications like she used to, she would have to think quickly on her feet and make decisions based on survival and mission success. She might also develop a more ruthless streak, especially when it comes to eliminating threats to her mission.
He might be more arrogant. Growing up with the Malfoys, he'd be used to thinking his family was superior. He'd lack the humility Harry in the original series has.
It would change her character in multiple ways. Firstly, she would be more adventurous. With the ability to fly with her angel wings, she would be eager to explore new places, both in and outside of the wizarding world. Secondly, her relationship with her friends could shift. She might feel a bit different from them, which could lead to some initial insecurities. But over time, she would use her new abilities to protect and help her friends even more, strengthening their bonds. She could also become more of a symbol of hope within Hogwarts, as her angel wings would be seen as something very special and almost otherworldly.
She would likely become more cynical. Instead of seeing the good in people, she'd be constantly looking for their weaknesses. For example, she'd no longer offer help to struggling students but rather use their difficulties against them. Her once - warm and friendly nature would be replaced with a cold and calculating demeanor.
It would likely make her more self - assured. Sirius would constantly be there to support her and tell her she's capable. This could lead to Hermione being even more outspoken and confident. Instead of just arguing her points in the classroom, she might start challenging the wizarding world's old - fashioned ideas more publicly. Also, she might develop a stronger sense of loyalty to those she cares about, like Sirius, similar to the loyalty he showed to his friends.
One plot twist could be that Hermione discovers she has a hidden connection to the Malfoy family, like she's a long - lost relative. This would add a whole new layer to her being raised by them. Another could be that she uses her knowledge of both the Gryffindor and Malfoy ways to broker peace between the two factions in the wizarding world that are often at odds. Maybe she uncovers a secret plot within the Malfoy family that goes against her new - found loyalty to them, forcing her to choose between her upbringing and what she believes is right.
She becomes more confident. With Sirius' boldness and Remus' intelligence guiding her, she's more willing to take risks. For example, in some fanfictions, she might be more likely to stand up to bullies at Hogwarts.
He'd be more likely to be initially haughty. Since the Malfoys are known for their pride in their pure - blood status. But he might also grow to be more cunning as he'd be in an environment where manipulation is sometimes used.