Well, family drama is a very common theme. Harry and Snape would need to build a relationship, which would be full of tension and misunderstandings at first. The theme of legacy also plays a role. Harry would inherit not only from the Potters but also from Snape. And there's often the theme of acceptance, both Harry accepting Snape as his father and the wizarding world accepting this new family situation.
One common theme is redemption. Snape was often portrayed as a complex and somewhat villainous character in the original series. In these fanfictions, being Harry's father gives him a chance to redeem himself in a more direct way. Another theme is family secrets. There are often a lot of secrets about how Snape and Lily got together and how Harry's true parentage was hidden.
One common theme is redemption. Snape has a lot to be redeemed for in the original story, and his relationship with Harry in these fanfictions can be a way for him to find that redemption. Another theme is the breaking of stereotypes. Snape is often seen as the strict and mean teacher, and Harry as the hero. Their marriage challenges these traditional views. Also, the theme of forgiveness is often present. Harry has to forgive Snape for his past actions, and Snape has to forgive Harry for being James Potter's son.
One common theme is redemption. Snape's love for Harry could be seen as a way to redeem himself for his past actions. Another theme is the exploration of forbidden love, given their teacher - student relationship. Also, there's often the theme of self - discovery for both characters as they navigate these new feelings.
The theme of self - discovery is also quite common. Snape is a character who has always been somewhat of an enigma. In yaoi fanfictions, his relationship with another male character can be a journey of self - discovery. He gets to know himself better, his desires and his capacity for love. And of course, the Hogwarts setting itself is a theme, with its halls and classrooms being the places where these relationships often unfold.
One common theme is secrecy. Since it's an 'unknown' relation, the fanfictions often focus on how this secret is kept and what it means for the characters. Another theme is identity. Harry's identity is completely shaken as he discovers he's Snape's son. There's also the theme of redemption for Snape. Maybe he has a chance to be a better father figure to Harry than he was as just a teacher.
Common themes include the mending of broken relationships. Given Severus and Remus' history in the original story, their relationship would need to evolve for them to raise Harry together. Another theme is the protection of Harry. Both Severus and Remus have strong protective instincts in the original series, and in these fanfictions, they would combine their efforts to keep Harry safe. Additionally, the theme of Harry's self - discovery in relation to his new family structure is often explored, as he tries to understand how he fits into this unique family unit.
One common theme is redemption. Severus Snape is often portrayed as a complex character in need of redemption, and his relationship with Harry can be seen as part of that journey. For example, in many fanfictions, Harry helps Snape come to terms with his past actions.
One common theme is the exploration of Snape's hidden paternal love. Another could be the revelation of secrets that were kept from Harry all his life.
One common plot is the discovery. Harry might find out through some hidden letters or a magical revelation that Snape is his father. Another plot point could be the reaction of the wizarding community. Some might be shocked, while others might see it as a way to redeem Snape's image.
One common plot point is the revelation of the truth. There's often a moment where either Snape or Harry discovers the truth about their relationship. Another is Snape's internal struggle. He has to deal with his long - held feelings for Lily and his new - found fatherly feelings for Harry. Also, there may be a change in how Harry views Snape. Instead of seeing him as a strict and often unfriendly teacher, he starts to see Snape in a new light, as his father.