One possible aspect could be that it explores a unique dynamic. In the original 'Harry Potter' series, Gryffindor and Slytherin are often at odds. So a fanfiction with Hermione trusting Slytherins might show a new side of her character. Maybe she sees past the house rivalries and realizes that Slytherins have qualities she can respect, like ambition and cunning in a positive light.
It allows for character development. Hermione's character can grow in new ways as she challenges her own beliefs and biases. And for the Slytherin characters, it gives them a chance to be seen in a different light, not just as the antagonists. It can show their complex personalities and how they can be more than just the 'bad guys' as they are often portrayed in the original series.
In the fanfiction world, the author might have created a scenario where the wizarding world is facing a new and greater threat. Lucius and Draco, having insider knowledge or resources, approach Hermione to form an alliance. At first, Hermione is skeptical but as they work together and prove their reliability in dealing with this threat, she begins to trust them. This could involve them sharing important magical knowledge or artifacts with her that are crucial in fighting the new danger.
One great Hermione and Slytherins fanfiction is 'A Different Sort of Bond'. It explores the relationship between Hermione and a group of Slytherins in a really interesting way. The characters are well - written and it shows how Hermione can break the stereotypes associated with Gryffindors and Slytherins.
One reason could be that they see her intelligence as an asset. Hermione is known for her brilliant mind, and Slytherins, who value cunning and resourcefulness, might respect that. They could also recognize her strength in the face of adversity and be drawn to protect her as a way to show their own growth beyond the typical Slytherin - Gryffindor rivalry. In some fanfictions, a Slytherin might have a personal connection or debt to Hermione, which leads to their protective nature towards her.
Well, in some versions, they might use their knowledge of the castle's secret passages to lead the troll away from Hermione. They could also work together as a team, using their Slytherin cunning to outwit the troll.
In many such fanfictions, they are forced to work together on a task or to solve a mystery. This shared goal makes them interact more frequently. As they spend time together, Hermione begins to see Snape's intelligence and his complex personality. She realizes that there is more to him than the cold exterior he shows. Snape, on the other hand, starts to respect Hermione's intellect and determination. This mutual respect and understanding gradually build their relationship into one of trust.
One example could be 'The Unlikely Bond'. In this fanfiction, Hermione discovers Snape's hidden motives during the war and gradually comes to trust him. It shows how Hermione, with her inquisitive nature, digs deeper into Snape's actions and realizes he was not as bad as she initially thought. Another good one is 'Hermione's New Perspective'. Here, after a series of magical mishaps, Hermione and Snape are forced to work together. Through their interactions, Hermione begins to see Snape in a new light and trust is slowly built between them.
One great fanfiction with this plot is 'Slytherin's Compassion'. In it, a group of Slytherins come across an injured Hermione in the Forbidden Forest. They initially have mixed reactions but end up helping her. It shows a different side of the Slytherin house.
The allure also lies in the exploration of Hogwarts house politics. Fanfictions in this genre often break the traditional boundaries between houses. They show that students from Gryffindor and Slytherin can work together, fall in love, or form strong friendships. It gives readers a new perspective on the wizarding world that J.K. Rowling created, which is very appealing.