In many fanfictions, their interaction starts with suspicion. Snape is a very guarded character, and a female Harry Potter would be an unexpected presence. So, at first, he might be cold and distant.
Well, it's mainly because of the complex relationship between them in the original series. Snape's actions towards Harry were often ambiguous. Fanfiction writers like to explore the idea of Snape having deeper, loving feelings for Harry as a way to add more depth to their relationship. It also gives an opportunity to rewrite some parts of the story from a different perspective.
One popular one might be those where Snape becomes a mentor to a female Harry Potter - like figure in an alternate universe. In these stories, Snape's complex character is explored further as he has to deal with a female version of the famous wizard. They often delve into his past traumas and how he overcomes them while guiding the female protagonist.
Another aspect that fanfictions often explore is Snape's role during the different wizarding wars. Some fanfictions might show his secret missions or his interactions with other important characters during those turbulent times that were not fully explored in the original series.
At first, Severus would probably be very suspicious of Harry. After all, Harry is an unknown figure suddenly appearing. But Harry, being the friendly person he is, would try to break the ice. He might start by complimenting Severus on his potion - making skills, which Severus is already quite good at even as a young boy. Their interaction would be a bit tense initially, but as they start to understand each other more, they could become friends or at least allies.
In fanfiction, they might interact more amicably from the start. Unlike in the canon where Snape was often harsh with Harry, with Female Harry Potter, he could be more understanding. For example, he might see her as a less brash and more empathetic character. Their conversations could be more open - ended and less combative.
There is a fanfiction called 'Snape's Silent Love'. In this story, Snape's love for Harry is a silent force that drives his actions. He might be secretly guiding Harry in his magical studies and protecting him from the shadows. 'Love in the Shadows of Hogwarts' is another one. Here, the author could play with the idea of Snape's love being a hidden part of Hogwarts' secrets. Also, 'Snape's Love: A Redemption Arc' might show how Snape's love for Harry becomes a part of his journey towards redemption in the wizarding world.
There's 'A Snape's Marital Adventure'. It shows a different side of Snape, where he has to navigate the challenges of married life while still being the brooding Potions master we know from the original series. It has interesting character interactions and a unique take on his relationships.
One popular 'Harry Potter x Severus Snape' yaoi fanfiction is 'The Prince's Consort'. It delves into an alternate universe where their relationship takes a romantic turn. The story is well - written, with detailed descriptions of their interactions and the emotional turmoil they go through.
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 great fanfiction is 'The Unseen Bond'. It delves into a unique relationship between Severus Snape and another male character. The story beautifully weaves in the magical elements of the Harry Potter world while exploring their complex emotions. It has some really touching moments that make it stand out.