Hermione would probably be both scared and defiant. At first, she'd be terrified as anyone would be in such a situation. But then, her Gryffindor courage would kick in. She'd start looking for ways to escape, like trying to pick the locks of her confinement if there are any, or using her knowledge of spells to create distractions and make her getaway. And she'd be constantly thinking about how to outsmart Dolohov, using her vast knowledge of magic and wizarding lore.
Hermione would likely react with her usual intelligence and quick - thinking. She might start by trying to analyze Dolohov's motives and weaknesses. She could also try to find a way to communicate with the outside world, perhaps using magic in a very discreet way.
One possible plot twist could be that Hermione uses her intelligence to outwit Dolohov even while kidnapped. Maybe she manages to leave hidden clues for her friends to find her. Another could be that Dolohov has an ulterior motive other than harming her, like using her as a bargaining chip in the wizarding war. Or perhaps Hermione discovers a hidden power within herself during the time of her captivity that helps her escape.
Hermione may first try to use magic to defend herself or escape right when the kidnapping is taking place. But if that fails, she will start to analyze the situation. She would think about what she knows of Dolohov from her studies and any previous encounters. Then, she would form a plan. She might even try to find allies within Dolohov's ranks if there are any who could be swayed, by appealing to their sense of self - preservation or better nature.
Archive of Our Own (AO3) is also a great place. It has a more diverse range of fanfiction, including some really unique takes on the Hermione and Dolohov relationship. The tagging system on AO3 makes it easy to find exactly what you're looking for. Just type in the relevant tags like 'Hermione Granger', 'Antonin Dolohov', and any other themes you might be interested in, like 'redemption' or 'enemies - to - allies'.
One possible fanfiction could be a story where Antonin Dolohov, after realizing the error of his ways in the wizarding war, tries to make amends and crosses paths with Hermione Granger. They start off as adversaries but gradually come to understand each other's perspectives.
There's also 'Dolohov's Redemption'. This fanfic focuses on Antonin Dolohov's journey towards redemption with Hermione as his guide. Hermione, being the intelligent and empathetic character she is, tries to help Dolohov atone for his past sins. It's a really interesting take on how someone as 'evil' as Dolohov in the original series could potentially change. It shows that no one is beyond redemption and Hermione is the perfect character to lead that change.
One common theme could be the power struggle. Hermione is a powerful witch, and Dolohov is a dark wizard, so their encounter when she's captured can be about who has the upper hand in terms of magic and wits. Another theme might be rescue, with her friends or other allies trying to save her from Dolohov's clutches.
It's interesting because it creates a sense of danger and suspense. Hermione is a strong character, and seeing her in a vulnerable position against a dark wizard like Dolohov makes for a gripping story.
A plot could be where Dolohov has a change of heart due to a mysterious encounter. He then approaches Hermione for help in escaping the clutches of the remaining Death Eaters. Hermione, being the brave and intelligent witch she is, decides to help him on the condition that he reveals all he knows about the Death Eater's plans. This leads to a series of tense interactions between them as they try to outwit the other Death Eaters.
One plot idea could be that Antonin Dolohov is forced to work with Hermione on a dangerous mission. Maybe they have to infiltrate a Death Eater stronghold together. At first, they are at odds, but as they face challenges, they start to respect each other's skills. Another could be a time - travel plot where Hermione goes back in time and has to deal with a younger Antonin Dolohov, trying to change his path towards the dark side. A third idea is that Antonin is under a spell that makes him forget his evil ways and he teams up with Hermione to solve a mystery in the wizarding world.
In a fanfiction, Antonin could start as a completely evil character. But as he spends time with Hermione, he could be influenced by her values. He might start to show kindness and remorse for his past actions. His development could be shown through small acts like protecting a Muggle - born wizard when he used to hunt them. Hermione could develop by learning from Antonin's survival skills in the dark wizarding world. She could become more street - smart and less reliant on just book knowledge. This would add depth to her character as she realizes there is more to magic and the wizarding world than what she learned in Hogwarts.