One common theme could be self - discovery. In many stories, the characters are on a journey to understand their own sexual orientation and identity within the context of their relationship. For example, they might be in a society that doesn't fully accept their love, so they have to figure out how to be true to themselves.
One common theme is identity exploration. Lesbian characters often struggle to come to terms with their sexual orientation and find their place in society. For example, in many novels, the protagonist might be in a conservative environment where being a lesbian is not easily accepted, and they have to figure out who they are on their own.
If we exclude inappropriate content, a common theme could be self - discovery. The teen in the story might be just starting to figure out her sexual orientation and the relationship with the other female (adult or also teen) could be part of that exploration.
One common theme could be self - discovery. In femharry stories, Harry (as a female) might go through a journey of understanding her new identity in the magical world. Another theme could be friendship, exploring how she forms and maintains relationships with other characters like Hermione and Ron.
The theme of self - discovery through love is also prevalent. When a character falls in love, they often learn more about themselves. They might become more confident, or they might realize their own flaws and work on them. This is often seen in stories where a shy person finds love and through that relationship, grows as an individual.
One common theme is the loyalty of dogs. Many dog fanfictions focus on how a dog is unwaveringly loyal to its owner, through thick and thin. For instance, in some stories, the dog will protect the owner from danger even at the cost of its own life. Another theme is the friendship between dogs and other animals or humans. They might show how a dog befriends a lonely child or forms an unlikely bond with a cat.
One common theme is self - discovery. When an OC is reborn, they often have to figure out who they are in this new life. Another theme could be redemption. Maybe in their previous life, they made mistakes, and now they get a chance to make things right. For example, if they were a bully before, they could become a protector in their new life.
One common theme is the complex relationship between Buffy and Angel. It could be about their unfulfilled love, the challenges they face in being together because of their different natures (Buffy as the slayer and Angel as a vampire with a soul).
Common themes can include love and friendship. They often explore the deep emotional bonds between female characters, like how they support each other through difficult times in life.
One more theme is the exploration of the Soul Society. There are many aspects of the Soul Society that the original series didn't fully cover. Fanfiction writers often take it upon themselves to expand on the lore, the different squads, and the politics within the Soul Society. This can lead to really interesting and unique stories that are not related to adult content.
If we exclude the adult - related themes that 'lemon' might imply, common themes in mermaid fanfiction could be the mermaid's longing for the human world. Mermaids might be curious about human culture, technology, or relationships. Another theme could be the mermaid's struggle to fit in, either in the human world or in their own mermaid society if they have some unique trait or ability that sets them apart.