In such fanfiction, Hermione could develop her understanding of the dark side of the wizarding world more deeply. Through her interactions with Lucius, she gets to see the inner workings of the dark wizards. This might make her more empathetic towards those who have been corrupted by the dark side, while also strengthening her resolve to fight against it. Her relationships with other characters could also change. She might become more isolated from her friends at first, but then find new allies among unexpected characters.
Hermione's character can be developed by showing her resilience. For example, she could use her knowledge of magic to protect herself from further abuse and find ways to expose her abuser. This would highlight her intelligence and determination.
Hermione's development in this type of fanfiction is a journey of self - discovery. Initially, she is in a state of shock and despair at being enslaved by Voldemort. But as the story progresses, she discovers inner strengths she didn't know she had. She becomes more self - reliant as she can't always count on her friends to rescue her. Her moral compass may shift slightly as she has to do things she wouldn't normally do to survive. For example, she might have to lie or deceive more often. However, through it all, her core values of intelligence and loyalty still shine through, but they are tempered by her new experiences in this dark world.
Lucius has a sense of entitlement that comes from his pure - blood upbringing and family wealth. Hermione, being a Muggle - born (in the original story), has had to fight for her place in the wizarding world. So in fanfiction as siblings, Lucius might initially look down on Hermione's more inclusive views, while Hermione would be appalled by Lucius's prejudice. However, as the story progresses, they could learn from each other. Lucius could become more open - minded and Hermione could understand the pressures of a pure - blood family.
In some fanfictions, Hermione might be developed as more of a rebel. For example, she could be tired of always following the rules in the Triwizard Tournament and decides to break a few to gain an advantage. This shows a different side of her, one that's willing to take risks.
Hermione could develop by becoming more in tune with her emotions. Since sirens are often associated with strong emotions and allure, she might learn to use her emotions in a more strategic way. For example, instead of just relying on her book knowledge, she'd use her new emotional intelligence to solve problems.
She could be developed by showing her struggle with the more physical aspects of being an Auror. Since she's known for her intelligence, it would be interesting to see her train hard to master combat skills, like dueling. This would show her determination and growth.
In this fanfiction, Hermione's development might involve her struggling with the moral implications of being associated with Lucifer. She is a character with a strong sense of right and wrong, but her interest in Lucifer could make her question those boundaries. This internal conflict would shape her character, making her more empathetic towards those who are considered 'dark' or misunderstood in the wizarding world. She could also become more secretive, as her new interest might not be well - received by her peers and professors.
Their relationship could start with hostility. Lucius might initially try to undermine Hermione's efforts in some wizarding matter, but she outsmarts him every time. This could gradually turn into a begrudging respect as he realizes her intelligence. For example, in a magical research competition.
One way could be through a dark magic spell gone wrong. Maybe Lucius was trying to create a servant using a forbidden spell and it backfired, turning Hermione into his pet in a way that she retained her intelligence but was bound to him. This would create a very complex and tense relationship within the fanfiction world.
Perhaps there could be a parallel universe scenario. In this alternate reality, Hermione's role as Lucius' mother could be due to different historical events. It might start with a divergence in the wizarding wars, which results in different pairings and family formations. This could lead to a very different Hogwarts, where Hermione's influence on Lucius shapes his actions towards Muggle - borns and the overall wizarding society in a new light.