One common theme is family loyalty. The Slytherin sister often has to balance her loyalty to her family, which may have strong Slytherin values, with her own moral compass. For example, she might have to decide whether to side with her family's traditional views or stand up for what she believes is right, like equality among all the Hogwarts houses.
One common theme is the struggle against the Slytherin stereotype. The sister character often has to deal with the perception that all Slytherins are evil or dark - wizards - in - training. For example, in many fanfics, she might be really kind - hearted but is constantly judged by others because of her house.
A lot of these fanfictions explore the concept of family. How does her being in Slytherin affect her relationship with Harry and other family members? Also, the theme of acceptance. The sister has to deal with the fact that Slytherin has a bad reputation in the wizarding world, and she has to find acceptance within that house and from others. For example, in some fanfics, she has to prove that she's not like the 'evil' Slytherins people expect.
One common theme is redemption. Slytherins are often seen as the 'bad guys' in the original series, so protecting Harry gives them a chance at redemption. For example, they might be trying to make up for past wrongs or the actions of other Slytherins.
One common theme is the exploration of his dark side. Since he was known for his ideas on pure - blood supremacy, many fanfictions delve into his motives and how that ideology developed. Another theme is his relationship with the other founders. Some stories focus on the initial harmony and then the growing rift between them.
Love and jealousy are also common themes. With multiple characters in a harem, there is bound to be love triangles or more complex relationship webs. Jealousy can arise when one character feels that another is getting more attention or has a stronger connection to the central character, leading to interesting plot developments and character growth.
Another theme is self - discovery. When Harry (or the other main character) dates a Slytherin, they often learn new things about themselves. They might realize that they had misjudged Slytherins all along and this makes them re - evaluate their own beliefs and values. It's like a journey of personal growth for both characters involved.
One common theme is redemption. Many Slytherin family fanfictions try to show that the Slytherins are not all bad. They may have made mistakes in the past but are given a chance to make things right. For example, a character might be trying to break free from the dark reputation of their family.
Another theme is loyalty within Slytherin house. Some fanfictions explore how Slytherins can be loyal to their own, even in the face of external challenges or when their actions seem at odds with the general Hogwarts population. It often shows a complex web of relationships within the house. For example, a Slytherin might be loyal to a friend who has been ostracized by the other houses. Also, power and ambition are often themes. Since Slytherin values these traits, fanfictions might explore how characters use their ambition in different ways, whether it's for personal gain or for the greater good of the wizarding world. This can lead to interesting character arcs where a Slytherin has to make difficult choices between their own desires and what is right for the community.
One common theme is redemption. Harry often has to prove himself to the Slytherins who abuse him, and in the process, some of his abusers might see the error of their ways. Another theme is resilience. Harry endures the abuse and grows stronger from it, showing his Gryffindor - like courage even while in Slytherin.
One common theme is the struggle against the negative stereotypes associated with Slytherin. Female characters often have to prove themselves as not being purely evil just because they are in Slytherin.