In some fanfictions, the relationship is portrayed as one of pure enmity. Fenrir Greyback, being a cruel and savage werewolf, is seen as a threat to Hermione. He represents the dark and violent side of the wizarding world that she is constantly fighting against. His predatory nature towards her, especially given her Muggle - born status, makes for a very tense and hostile relationship.
The relationship could be depicted as a reluctant partnership. Maybe they are forced to work together to solve a mystery that involves werewolf lore and some ancient magic. Hermione is initially disgusted by Fenrir but as they spend more time together, she discovers that he has a tragic past that led to his current state. Fenrir, on the other hand, respects Hermione's power and intelligence. This mutual discovery forms a complex and unique bond between them.
Authors often portray it as a very antagonistic relationship. Fenrir is a dark and violent character, and Hermione is a symbol of good and knowledge. So, their interactions are usually filled with tension, like Fenrir seeing Hermione as a target because of her connection to Harry Potter and the fight against Voldemort.
You can start by looking on popular fanfiction websites such as Archive of Our Own (AO3). AO3 has a vast collection of fanfictions from various fandoms, and there's a good chance you'll find some Hermione Granger x Fenrir Greyback stories there. Just use the search function and type in the relevant tags.
Their relationship could start with Hermione being a captive of Fenrir. But instead of harming her immediately, he becomes intrigued by her intelligence. As time passes, Hermione might start to see some humanity in Fenrir that others don't, and they could form an unlikely alliance against a common enemy.
For Hermione, her development could involve facing her fears of werewolves like Fenrir. She might start off being very cautious and perhaps a bit prejudiced due to his reputation. But as the story progresses, she could learn to look beyond the surface and see the complex person (or creature) that Fenrir is. This would show her growth in empathy and open - mindedness.
There could also be a fanfiction where Hermione Granger is forced to face Fenrir Greyback alone in a dangerous situation. This would showcase her bravery and her ability to use her magic skills under extreme pressure. The story could focus on her mental and magical struggle against Greyback, perhaps with her using some of the more advanced spells she has learned over the years to defend herself and those around her from the werewolf's attacks.
One interesting storyline could be Hermione using her intelligence to outwit Fenrir Greyback. For example, she could create a spell or potion that repels werewolves like him. Another could be a scenario where Fenrir tries to capture Hermione for some dark purpose, but she manages to turn the tables on him with the help of her friends. Maybe she could also find a way to cure Fenrir's lycanthropy, leading to a change in his character.
One interesting plot could be Hermione trying to use her intelligence to outwit Fenrir Greyback. Maybe she's on a mission to rescue someone he's captured, and she has to use her magic skills in new and creative ways. For example, she could use a combination of transfiguration and charms to create distractions while she sneaks around his lair.
The contrast between the two characters. Hermione is a brilliant, studious witch, while Fenrir is a savage werewolf. This contrast can lead to some really interesting character dynamics in fanfictions.
Their relationship could start with Hermione being cautious. She might initially see Fenrir as a threat despite his 'good' nature. But as she gets to know him better, she realizes his potential for good. They could start working together on small projects, like helping other werewolves in the community, which gradually builds trust between them.