The theme of secrecy also pops up a lot. The vampire has to keep their true identity a secret in Smallville. This leads to situations where they have to lie and deceive the people around them, which adds to the tension in the story.
One common theme is the exploration of their unrequited love. Often, in the show, there were hints of something more between Clark and Chloe, and fanfiction delves into that unfulfilled potential.
Another theme is the struggle with identity. The pregnant character may question who they are now and how they will be perceived. In the context of Smallville, which has its own set of values and expectations, this can be a big part of the story.
One common theme is the anticipation and excitement of starting a family. It often explores how Clark and Lois deal with the changes that come with pregnancy.
A common theme is the clash of two different worlds. Smallville is more of a small - town superhero origin story, while Buffy deals with the supernatural in a more urban and 'chosen one' kind of way. So, the fanfics often explore how these two concepts collide.
One common theme is self - discovery. The male OC often has to figure out his powers or his place in Smallville. For example, he might be an alien or have some sort of special ability that he needs to understand. Another theme is friendship. He usually forms bonds with the existing characters like Clark, Chloe, and Lana. For instance, in many fanfictions, the male OC helps Clark with his own journey of becoming Superman.
Another theme is the power struggle. Smallville often focused on Clark's journey to control his powers, and Supergirl has her own power - related challenges. In crossovers, they might face a common enemy where their combined powers are needed, and this creates a power struggle dynamic as they figure out how to work together effectively.
One common theme is redemption. Lex's character often has a chance at redemption through love. Another is self - discovery. As he falls in love, he discovers new aspects of himself. And also, the theme of sacrifice can be seen, where Lex might have to sacrifice certain things for his love.
One common theme is friendship. Often, the OC forms a deep friendship with Clark. Another theme is discovery, like the OC helping Clark discover new things about his powers or his Kryptonian heritage.
One common theme could be friendship development. Since they are both characters in the Smallville universe, fans might explore how their friendship grows. Another theme could be adventure, with Clark and Simone getting involved in some sort of exciting situation together.
In Smallville slash fanfic, a frequent theme is the transformation of relationships. It could be from friendship to something more romantic or a shift in the power balance. Also, the theme of secrecy is common. Since their relationship is not part of the mainstream story in the show, the characters often have to keep it a secret. And there's the theme of sacrifice. Characters may sacrifice their own desires or goals for the sake of the relationship, which adds a layer of depth to the stories.