It's a really wild concept in fanfic. Hermione is always associated with knowledge, justice, and the side of good. However, some fanfic authors might be trying to subvert the normal expectations. But in the canon, there's no way she could be a Death Eater. She detests everything they stand for, from their pure - blood mania to their use of dark magic.
In fanfic, a Hermione Granger and Death Eater pairing can be quite an interesting and controversial concept. It might explore the idea of redemption for the Death Eater through Hermione's influence. For example, if it was a pairing with Draco Malfoy (who had Death Eater ties), fanfic could show how Hermione's strong will and intelligence could change his views over time. However, it also challenges the traditional good - versus - evil dynamic in the Harry Potter universe.
It's a really strange concept. In the original 'Harry Potter' universe, Hermione is firmly on the side of good. But in fanfiction, if she's a Death Eater, it could be a result of a time - travel gone wrong. She might have made a different choice in an alternate timeline that led her down the dark path. But again, this is very much against the essence of her character.
It's an interesting, if not completely unbelievable, concept in fanfic. The Hermione we know is all about fighting for equality, knowledge, and against the Dark Arts. However, in fanfic, authors can play with the boundaries of the story. Maybe they want to show how the allure of power could potentially corrupt even the most virtuous of characters. But it still feels very wrong considering Hermione's original character traits.
It can completely shift the narrative. It adds an element of conflict right from the start. The fanfic would have to deal with the inherent differences between Hermione's values and those of a Death Eater. For instance, Hermione values equality among wizards and witches, while Death Eaters often believe in pure - blood supremacy.
There could be fanfics like that. For example, it might be a 'what - if' story. What if there was a powerful dark magic spell that made everyone believe Hermione was a Death Eater? This would lead to her having to fight against not only the real Death Eaters but also the false perception of her among her friends. Such fanfics can be really creative and offer a different perspective on the story.
One common plot is that she might be a double agent. Pretending to be a Death Eater to get inside information for the good side. For example, she could be using her intelligence to outwit Voldemort and his followers from within. Another plot could be that she was brainwashed as a child by a hidden Death Eater and only discovers her true identity later. It's a dark and twisted take on her character.
One possible motive could be a deep - seated dissatisfaction with the wizarding world's status quo. Maybe she felt that the Ministry of Magic was corrupt and that the Death Eaters had a better vision for change, although a very dark one. Another could be some sort of personal vendetta against someone in the Order of the Phoenix or Hogwarts faculty that made her side with the Death Eaters.
One way to find good 'Hermione Granger Death Eater' fanfics is to join Harry Potter fan groups on social media platforms. Ask the members if they know of any such well - written stories. Sometimes, fans share their favorite fanfics within these groups, and you might get some great recommendations that way. Another option is to check out some fanfic blogs that focus on Harry Potter. They often review and recommend interesting fanfics.
Bellatrix Lestrange is also a likely candidate. Her encounter with Hermione would be extremely intense. Given her loyalty to Voldemort and her rather unhinged nature, she would likely pose a serious threat to Hermione, but Hermione might also find a way to use Bellatrix's madness against her.
In this type of fanfiction, the relationship between Hermione and the Death Eater could be very complex. Maybe it starts as a hostile one, but as the story progresses, they might find some common ground or mutual understanding. It could also be a story of redemption for the Death Eater through Hermione's influence.