Hermione is known for her strong sense of justice and intelligence. The Lestrange brothers, coming from a dark pure - blood family, might have a more cavalier attitude towards the law and a different view on power. Hermione would clash with them when it comes to ethical use of magic. For example, she would never condone their use of dark spells for personal gain. Her studious nature would also contrast with their more impulsive and power - hungry ways.
Hermione is very logical and values knowledge. The Lestrange brothers, likely influenced by their family's dark history, might be more superstitious and rely on traditional pure - blood magic that Hermione might see as archaic and sometimes unethical. She would constantly question their motives and actions. Her loyalty to her friends and the greater good would put her at odds with the brothers' self - serving and potentially cruel behavior. For instance, if they wanted to use a spell on an innocent to get information, Hermione would vehemently oppose it. She would try to use her words and knowledge to persuade them to change their ways, which would lead to many arguments.
She could also be calculating. Since she's so intelligent, she might be quickly assessing her surroundings, looking for any weaknesses in their captivity of her. She might be thinking about which spells she could use effectively in the given situation, or how to use the environment to her advantage.
The fanfiction might start with the Lestrange brothers receiving a prophecy that a powerful witch will be the key to their success. They soon discover that Hermione fits the description. So they begin to lurk in the shadows, observing her every move and waiting for the right moment to approach her.
To develop Hermione's character in this fanfiction, we can explore her moral compass in greater depth. When interacting with the Lestrange brothers, she has to constantly make decisions about whether to trust them or not. This could lead to internal struggles that show different sides of her. As for the brothers, they could be developed by showing their vulnerability. Perhaps they have nightmares about their past misdeeds and Hermione helps them face these demons. This would make them more complex characters rather than just being the 'bad guys' from the original story.
There are likely some out there. However, this kind of fanfiction often takes a rather dark and morally complex turn as the Lestrange brothers are Death Eaters in the original 'Harry Potter' lore. It might be hard to find ones that are well - written and don't cross into inappropriate territory.
One common theme might be power dynamics. Since Hermione is in a'slave' role, it would likely explore how the Lestrange brothers, who are associated with the Dark Arts, exert their power over her. Another theme could be Hermione's struggle for freedom and how she might resist or adapt to her situation.
One possible plotline could be that the Lestrange brothers use their dark magic and charm to gradually draw Hermione into their world. Maybe they start by showing her some dark secrets that she becomes intrigued by against her better judgment.
Well, it could involve the Lestrange brothers having some dark motives for kidnapping Hermione. Maybe they want to use her knowledge of magic for their own evil plans, like getting access to powerful spells she knows.
Perhaps the plot is centered around Hermione trying to reform the Lestrange brothers. She might see some good in them that others don't, and attempts to bring them over to the side of good. This could lead to all kinds of situations, like her having to protect them from the wrath of other wizards who don't trust them.
In these fanfictions, Hermione is often portrayed as a strong - willed and intelligent character. Despite being claimed by the Lestrange brothers, she doesn't cower. For example, she might use her vast knowledge of magic to hold her ground against them. She could be shown as a fighter, using her wits to try and escape or gain the upper hand in the situation.
It's also possible that Hermione tries to reason with the Lestrange brothers. She could appeal to their better nature, if they have any left. Maybe she could remind them of the consequences of their actions, or try to make them see the error of their ways in following Voldemort. This could lead to an internal struggle within the brothers about whether to continue holding her or let her go.