Well, they might become more empathetic. Usually, Slytherins are seen as cunning and self - serving, but taking care of Hermione could soften them. For example, they might start to consider the well - being of others more often.
One common theme is breaking stereotypes. Slytherins are often seen as the 'bad guys' in the original Harry Potter series, but in these fanfictions, they care for Hermione, which goes against that perception.
One popular 'Slytherins care for Hermione' fanfiction is 'A Slytherin's Redemption'. In this story, a group of Slytherins start to see Hermione's worth and protect her from other threats in the wizarding world. It has an interesting plot where the Slytherins break the stereotype of their house.
Another plotline might involve the Slytherins having to hide Hermione from other houses or even some dark wizards. They form a sort of secret society within Slytherin to keep her safe, and in the process, they break the stereotypes associated with their house.
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.
One possible plot twist could be that the Slytherins, who are often seen as the 'bad guys' in the Harry Potter universe, discover a prophecy related to Harry while taking care of him. This prophecy might not be the same as the one in the original story and could lead them to protect Harry in a way that goes against their traditional Slytherin values. For example, they might have to form alliances with Gryffindors or other houses they usually oppose.
One plot idea could be that the Slytherins secretly protect Harry from the more dangerous Death Eaters within their own families. They use their knowledge of the Slytherin common room's hidden passages to hide Harry when there's a threat. Another could be that a group of Slytherins form a sort of 'underground' protection squad for Harry after they realize he's the key to defeating Voldemort and they don't want Slytherin to be on the losing side. Maybe they start by leaving him helpful potions and anonymous notes with useful information.
At first, Harry might be suspicious. But as the Slytherins keep showing kindness, he starts to see them in a new light. He realizes that not all Slytherins are like the ones he initially thought were mean.
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.