Popular themes in Katherine fanfiction from 'The Vampire Diaries' include her manipulation skills. She was a master at getting what she wanted through manipulation, and fanfictions often explore how she uses this against different characters. Her connection to the original vampire family is also a big one. How she interacted with Klaus and Elijah, and the power plays between them, makes for interesting fanfiction material. Additionally, her role in the overall mythology of the show, like her part in the doppelganger story, is often explored in fanfiction.
One popular theme is alternative universes (AUs). For example, stories where the characters are in a modern - day high school but with a supernatural twist different from the show. Another is character relationships. Fans often explore different pairings, like Damon and Bonnie, which might not be as prominent in the original series. And there are also time - travel themed fanfics, where characters go back in time to change certain events in the Vampire Diaries timeline.
The popularity comes from the complex relationship between Bonnie and Katherine. They are two very different characters in the Vampire Diaries. Bonnie is often seen as the good witch, while Katherine is the devious vampire. Fanfiction writers like to explore how these two could interact in different scenarios, whether it's a friendship, an enmity, or something in between.
One common theme is the struggle with identity. Since she's Katherine's daughter, she has to deal with the reputation and legacy her mother left behind. Another theme is love and relationships, just like in the original show, exploring who she falls in love with among the existing characters.
One common theme is the idea of forbidden love. Their relationship is complicated by the fact that they are vampires with a lot of history and baggage. Another theme is redemption. Often, Katherine is portrayed as trying to make up for her past wrongs, especially in Damon's eyes.
There are fanfictions where Katherine has a change of heart and tries to redeem herself for Stefan. She could be fighting against her old nature and Stefan is initially skeptical but gradually starts to believe in her transformation. This would be a story full of internal and external conflicts as they navigate their relationship in this new dynamic.
One interesting fanfiction could be about Elijah trying to redeem Katherine. Maybe he sees a side of her that others don't, and he attempts to guide her towards a more positive path. It could involve them traveling together and facing various challenges from the vampire world.
There could be a fanfiction where Klaus realizes his true feelings for Katherine after she saves his life. In this story, they might struggle with their past betrayals but eventually find a way to be together. Katherine's cunning nature might be softened by Klaus's affection, and they could have a complex relationship full of passion and drama.
One interesting fanfiction could be about Katherine and Elena teaming up against a common enemy. In this story, they might realize that despite their differences, their combined power is needed to defeat a new and powerful vampire in Mystic Falls. They start to train together and along the way, they learn more about each other's pasts and find some common ground.
There are fanfictions where Katherine returns from the dead in a different form, perhaps as a spirit. Damon, who has always had a deep connection with her, has to figure out how to interact with this new version of Katherine. It could involve a journey of self - discovery for Damon as he realizes that his feelings for her are more complex than he thought, even in this new and strange situation.
Another type of fanfiction could be a time - travel one. Stefan and Katherine are sent back in time to a period before Katherine was turned into a vampire. In this time, Stefan tries to prevent Katherine from becoming a vampire in the first place. This would change the whole course of their relationship and the events in the Vampire Diaries universe. It would be full of interesting twists as they navigate through the past, trying not to change too much but also trying to change their own fates.