One possible plotline could be a story of redemption. Maybe a Death Eater starts to question their beliefs after getting to know Hermione on a deeper level. For example, they could be forced to work together on a mission and gradually see the good in her, leading to a change in their ways.
Another plot could be a struggle for Hermione. She might find herself in a situation where she has to pretend to befriend a Death Eater in order to gather intelligence for the Order of Phoenix. But in the process, she discovers that not all Death Eaters are as one - dimensional as she thought, which creates an internal conflict for her.
Perhaps there could be a love triangle situation. Hermione is involved with a Death Eater in some way, but she also has feelings for someone on the side of the good. This would lead to a complex web of emotions and loyalties as she tries to figure out her true feelings and where her allegiances lie.
A possible plotline could be that a Death Eater discovers Hermione has knowledge of a powerful spell or magic item that could help them overthrow Voldemort. So, they save her to get that information. For example, she might know of a way to break a powerful curse that Voldemort has placed on them.
Well, it could start with Hermione being kidnapped by the Death Eaters at a young age. She might be forced to attend their dark magic lessons. However, she uses her intelligence to learn about their weaknesses. For instance, she could discover a flaw in the security spells around their lair. And then, as she grows up, she could start to subtly manipulate the Death Eaters into fighting among themselves, all while pretending to be a loyal follower.
She could face legal issues in the wizarding world. Killing is not taken lightly, even if it's Death Eaters she's killing. There might be a trial to determine if her actions were justified. If the wizarding authorities are corrupt or influenced by the wrong people, she could even be wrongly convicted.
A plotline could involve Hermione being in a situation where she has to negotiate with two Death Eaters. Through the negotiations, they start to see her intelligence and strength. They form an unlikely bond where they end up protecting each other from other threats in the wizarding world. This bond could be written in a way that explores the idea of a threesome in terms of their connection and how they function together as a unit, without any sexual connotations. It could be about breaking down the barriers between the 'good' and the 'evil' in the context of the Harry Potter universe.
Draco Malfoy could be a likely character. He was a Death Eater (or on the verge of becoming one), and his relationship with Hermione has always been complex. There's a lot of potential for a story between them as they have a history of rivalry and yet could potentially find common ground or unexpected feelings for each other.
Maybe Hermione discovers that one of the Death Eaters training her has a change of heart. This Death Eater then starts to help Hermione escape or undermine the other Death Eaters from within the group. It adds an interesting layer of complexity to the story.
One possible plotline could be that they meet under some unusual circumstances, perhaps during a time when the wizarding world is in chaos. Lucius, who is used to a certain way of life, is initially resistant to his connection with Hermione but gradually comes to respect and care for her. Hermione, on the other hand, might see the good in Lucius beneath his cold exterior.
A fanfiction involving Hermione and Death Eaters could focus on a moral dilemma. For example, if Hermione has the chance to save a Death Eater's life, would she do it? This could explore her character's sense of right and wrong. It could also be about how she endures the psychological torture that the Death Eaters might inflict on her, showing her strength and resilience.
Well, in some fanfictions, Hermione might use her superior intellect. She could outwit the Death Eaters by setting up elaborate magical traps. For example, she could use transfiguration magic to create objects that suddenly turn into something dangerous when the Death Eaters approach. Another way could be through her extensive knowledge of potions. She might create a potion that incapacitates or kills them when they come into contact with it.
One consequence could be that she is forced to perform dark magic against her will. This would be a huge moral struggle for her, as Hermione is a firm believer in the light side of magic. It could also change her perception of herself and her magic abilities in a very negative way.