Well, it could be that Voldemort gives Hermione to Dolohov to try and break the morale of the resistance. However, Hermione uses this as an opportunity to gather intelligence on the Death Eaters. She might pretend to cooperate with Dolohov at first while secretly sending messages to the good side. And later, when the time is right, she could use the knowledge she gained to help defeat Voldemort and his followers.
One possible plotline could be Hermione getting to know Dolohov in an alternate universe where he has a different side to him. Maybe she discovers some hidden good in him and tries to redeem him.
She is likely to be defiant. Hermione has always been a strong - willed character. So she would probably not go down without a fight. She might immediately start looking for ways to escape or undermine Dolohov's plans.
A plot could involve a magical accident that causes Hermione to see Dolohov in a different light. Maybe a spell backfires and she starts seeing his memories, understanding his past traumas that led him to become a Death Eater. This new understanding makes her develop feelings for him. But she has to deal with the fact that he's still on the wrong side in the eyes of the wizarding world. She might then try to subtly nudge him towards the good side while hiding her crush from everyone else.
Well, a plotline could involve Hermione having hidden powers that are related to her being Voldemort's daughter. Maybe she has an ability to control dark magic in a way that no one else can. She could also be hunted by both the good and the bad sides. The good side might fear that she will turn evil like her father, and the bad side might see her as a threat to their power. Additionally, there could be a plotline where Hermione tries to redeem Voldemort through her connection to him, believing that there is some good in him after all.
One possible plotline could be that Voldemort gives Hermione to Draco as a way to test Draco's loyalty. Draco, who has his own complex feelings towards Hermione, might initially be conflicted. He could be ordered to torture her for information, but instead, he tries to protect her in secret. This could lead to a series of events where they form an unlikely alliance against Voldemort.
Well, a plotline could involve Hermione exploring her dark magic abilities. Since she's Voldemort's daughter, she may have a natural inclination towards certain dark spells and powers. This could put her in a difficult position as she has to hide it from her friends at first. Maybe she starts to have strange dreams or visions related to her father's past and his plans. Also, the story could focus on how she uses her intelligence, which was always her strong point, to either embrace or fight against her dark heritage. For instance, she could use her knowledge of magic to find a way to break the connection to Voldemort if she wants to be on the good side, or she could use it to further his dark plans if she succumbs to her new identity.
One possible plotline could be that it's all a big mix - up. Maybe a bumbling wizard mis - casts a spell that makes everyone think Hermione is pregnant with Voldemort's child. And then the story could be about how they try to reverse the spell while getting into all sorts of comical situations, like Hermione trying to hide from the shocked looks of her friends and Voldemort being completely baffled by the whole thing.
One possible plotline could be that Harry is tricked by Voldemort. Voldemort might use some powerful dark magic or false promises to make Harry believe that joining him is the right thing to do. For example, Voldemort could claim to have a way to end all the bloodshed in the wizarding world if Harry helps him.
Often, in these fanfictions, Hermione is used as a tool to understand Voldemort better. There might be a plot where she is forced to enter his mind, like in a Legilimency - related situation. This could create a connection between them that the fanfiction then explores. Another common plot is that Hermione's magic has some sort of resonance with Voldemort's, which draws them together in a relationship that is both dangerous and full of potential for new storylines.
Hermione might initially be shocked and afraid, but she would quickly gather her wits. She would assess Draco, trying to figure out if there was any way to sway him to her side. Given her ability to see the good in people, she might try to appeal to any sense of morality Draco has left, all while secretly planning her escape or a way to undermine Voldemort's plan of using her as a pawn against the good side.