Cassandra Clare is known for her ability to create complex relationships, and if she were to write in this genre, she'd probably be great. Another good one could be Rainbow Rowell. She has a knack for writing unique characters and relationships. Also, J.K. Rowling herself, if she were to explore this fanfiction - like concept more deeply, would be amazing as she created the original world and characters.
Well, 'A Different Sorting' is a fanfic that you might like. In this story, Hermione being in Slytherin makes for a very different Hogwarts experience, especially with Draco. Their relationship is full of tension and unexpected moments of understanding. 'Slytherin Hermione's Alliance' is also good. It shows how Hermione and Draco form an unlikely alliance within Slytherin house, and how that affects the overall story in the wizarding world. And don't forget 'Hermione in Green', where her Slytherin side brings out new aspects of her character in relation to Draco.
A possible plot is that Draco, who is in Slytherin, discovers a hidden secret about Hermione's family that has ties to Slytherin. This makes him see her in a new light and they start to form an unlikely alliance. They could then face challenges from their respective houses. Another plot idea is that in an alternate universe, Hermione is sorted into Slytherin and she and Draco become friends and then something more, as they strive to change the negative perception of Slytherin from within.
One interesting plotline could be Hermione struggling to fit in Slytherin at first. She's used to the values of Gryffindor, so being in Slytherin where ambition and cunning are prized in a different way would be a big adjustment. For example, she might have to deal with the initial suspicion from her Slytherin housemates who are not used to having a 'Mudblood' among them. But as time goes on, she could use her intelligence to show them that she belongs there and maybe even change some of their views on blood purity.
At first, their relationship might be full of tension. Draco is used to the pure - blood ideology of Slytherin and Hermione is a Muggle - born. But as they spend more time together, they start to see each other's good sides. For instance, Draco might notice Hermione's determination and loyalty, which are also Slytherin traits in a way.
It could be Draco Malfoy. Despite his past animosity towards Hermione, in the fanfiction, he might have a change of heart. Maybe he realizes that the old pure - blood ideas are wrong and decides to use his Slytherin cunning to protect her. Another character could be Blaise Zabini. He's often portrayed as a bit of an enigma in the original books, and in this fanfiction, he could see Hermione's value and take it upon himself to keep her safe.
Hermione's character development could involve her learning to balance her traditional values with the new ones in Slytherin. She might start to value self - preservation more, as it is a trait often associated with Slytherin. This could make her a more well - rounded witch, not just relying on her Gryffindor - like courage all the time. Draco, on the other hand, could become more empathetic. Seeing Hermione face the challenges of being in Slytherin as an outsider could make him realize how wrong some of his previous actions were, and he could grow to be more inclusive.
One good plot twist could be that Hermione's intelligence is initially shunned in Slytherin. They value cunning more, but she uses her smarts to re - define what cunning means in the house. For example, she could outwit Draco in a series of challenges related to potions, using her book - learned knowledge in a sly way that Draco didn't expect.
If Hermione was in Slytherin, their relationship would be more complex. They would have to overcome the typical Gryffindor - Slytherin rivalry. Harry might initially be more suspicious of Hermione's motives since Slytherins are often seen as more self - serving. However, Hermione's intelligence and loyalty would still shine through, and she would prove to Harry that not all Slytherins are bad. Their friendship would likely be more private as they would face scrutiny from both houses.
She could develop a more guarded personality. In Slytherin, she'd learn to protect her thoughts and feelings more, as the house has a reputation for being shrewd. Her confidence might also take on a different edge, becoming more self - assured in a slytherin - like way. For example, she'd be more likely to speak up when it benefits her and the house directly.