A possible plot is that Hermione, in her pursuit of equal rights for magical creatures, decides to reach out to Fenrir Greyback. At first, he is hostile, but Hermione's determination and her ability to see beyond his monstrous side start to change him. They could end up in a situation where they have to work together to stop a greater evil that is targeting werewolves and other marginalized magical beings. This would involve Hermione using her logical thinking and Fenrir using his knowledge of the werewolf underworld.
One plot idea could be that Fenrir, in his 'good' form, helps Hermione in her research on werewolves. He uses his insider knowledge to guide her in understanding the complex nature of lycanthropy, and they form an unlikely alliance against those who want to use werewolves for dark purposes.
One idea could be that Fenrir Greyback, instead of being a full - on villain, has some sort of complex relationship with Hermione. Maybe he's forced to protect her in a situation where they are both in danger from a greater dark force. This could lead to a lot of tension and moral dilemmas for Hermione as she has to deal with being around a werewolf who has a reputation for being cruel.
One plot idea could be that Fenrir Greyback, instead of attacking Hermione, is somehow magically bound to protect her. This could lead to a strange alliance where Hermione has to trust a werewolf known for his brutality. Another idea is that Fenrir has a change of heart due to Hermione's intelligence and courage, and he starts to fight against his dark nature for her sake. Maybe he could help Hermione in a battle against the Death Eaters by using his werewolf strength in unexpected ways.
In one fanfiction concept, Greyback saves Hermione when she is trapped in a magical maze created by dark wizards. Greyback, being a cunning and experienced dark creature, is able to navigate the maze and get to Hermione before the maze collapses or she is killed by the various traps inside. He might save her because he senses that she has a great potential that could be useful to him in the future.
Another storyline might involve a time - travel scenario where Hermione goes back in time and encounters a younger Fenrir Greyback. She attempts to change his path, to prevent him from becoming the cruel werewolf he is known to be in the future. This could involve her using her knowledge and magic to offer him a different future, but facing many challenges along the way.
A really interesting plot could be set in an alternate universe where Fenrir Greyback was once a normal wizard but was turned into a werewolf by dark magic. Harry Potter, through some magical accident, finds himself in Greyback's past and tries to prevent his transformation, which would change the course of the entire wizarding world as they know it.
A possible plot could be that Hermione gets bitten by Greyback accidentally. Instead of turning into a full - blown werewolf, she has some new abilities and a strange connection to Greyback. They then have to figure out how to deal with this new situation, while also facing the wizarding world's prejudice against werewolves. It could also involve Hermione using her intelligence to find a cure for herself and in the process, changing Greyback's view of non - werewolves.
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.
One possible plot could be that Fenrir, for some reason, has a change of heart. Maybe he sees Hermione's kindness and intelligence during one of his encounters with the wizarding world. He starts to protect her secretly from other dark forces. And Hermione, initially afraid, gradually realizes there's more to him than just a monster.