A plot twist could be that Ginny is not really Ginny. The Death Eaters might have kidnapped a disguised decoy while the real Ginny is off on a secret mission. Or, perhaps the place where she is being held has some ancient magic that starts to affect the Death Eaters in unexpected ways, like making them see their worst fears. This could give Ginny an opportunity to escape. Also, it could be that Ginny's kidnapping was a set - up by someone within the Order of the Phoenix who has been secretly working for the Death Eaters all along, but Ginny uncovers this plot and uses it to her advantage.
Harry Potter is the most obvious choice. He has a deep connection with Ginny and would stop at nothing to save her. Ron and Hermione would also be likely candidates. Ron, being Ginny's brother, would be extremely motivated to rescue her. Hermione, with her vast knowledge of magic, would be crucial in coming up with a rescue plan. Neville Longbottom could also be a potential rescuer. He has shown great courage and has a strong sense of loyalty towards his friends. He might step up to the challenge of rescuing Ginny from the Death Eaters.
They're popular because it gives readers a chance to see Harry in an action - packed role. Hunting down the Death Eaters shows his heroism in a different light. It also allows for new storylines and character development outside of the original books.
Well, 'Death Eaters on the Run' is a fanfiction that fits this. Harry starts by following small leads about the whereabouts of Death Eaters. As he delves deeper, he discovers a network of hidden supporters still loyal to the old ways. The story is full of action, with Harry facing dangerous spells and traps while hunting them down.
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, she could end up in a duel with a powerful Death Eater. Hermione is a very skilled witch, so it would be a great show of her magical abilities. Maybe she discovers a new spell during the fight that helps her gain the upper hand.
There's a fanfic where a group of Death Eaters end up saving Hermione because they realize she holds the key to a greater power that could benefit them in the long run. They protect her from other dark forces in the wizarding world. It's an interesting take on the relationship between the 'bad guys' and Hermione.
It often develops slowly. At first, they might just exchange glances that hold a hidden meaning. Then, they start to find excuses to be near each other more often.
Ron can also be included. He might be a bit clueless at first about their relationship, but then he can become a source of comic relief as he tries to play matchmaker or accidentally gets in the way of their romantic moments.