One popular theme is redemption. Kai is often a character in need of redemption, and in many fanfictions, Bonnie becomes the catalyst for that change. Their relationship is explored in the context of Kai trying to make up for his past misdeeds.
Another theme is the forbidden love aspect. Given their different natures and the events in the Vampire Diaries universe, their relationship is often seen as something that shouldn't happen. But in fanfiction, this just makes it more exciting as the authors explore how they navigate the difficulties and taboos associated with their feelings for each other.
The power struggle theme is also quite common. Bonnie is a very powerful witch, and Kai has his own brand of power. Fanfictions often play with how they interact in terms of power, whether they are at odds or find a way to combine their powers for a common goal.
One great Bonnie and Kai fanfiction is 'The Unlikely Bond'. It delves into how Kai's chaotic nature and Bonnie's powerful magic create an interesting dynamic. Their interactions are filled with tension and an underlying attraction that the author builds up really well.
The 'Forbidden Love' trope is also common. Kai might fall in love with a character he shouldn't, like a vampire hunter or a witch from an opposing coven. It creates a lot of drama and tension in the story. For instance, in some fanfictions, Kai's love interest is from a family that has been sworn enemies of his for generations, and they have to fight against all odds to be together.
Love and sacrifice are very common. Their relationship in the show was complex and often involved one sacrificing for the other, and fanfictions tend to explore this deeper.
One common theme is redemption. Damon has a lot of past wrongs, and in many fanfictions, Bonnie plays a role in his journey towards redemption. For example, she might make him face the consequences of his actions in a more empathetic way.
One common theme is the idea of an unlikely friendship. Since they have different personalities in the show, fanfictions often explore how they can form a deep bond. Another theme is adventure. They are usually thrown into some sort of dangerous or mysterious situation together.
One possible fanfic could be where Bonnie and Kai start off as enemies. Kai, with his complex and often dark nature, is initially intrigued by Bonnie's power. As time goes on, he begins to see her kindness and determination. They might be thrown into a situation where they have to rely on each other to survive, like being trapped in a supernatural dimension. This shared experience could be the start of their love story, with Kai slowly changing for the better because of Bonnie.
Well, the plot could be that Kai escapes from the prison world again. This time, he ends up in a situation where he has to protect Bonnie from a new threat in Mystic Falls. In the process of protecting her, he realizes his feelings for her. Bonnie, on the other hand, is initially hesitant but then starts to see the good in Kai. They could have a lot of adventures together while fighting off the threat and falling in love along the way.
One of the most common themes is the exploration of the characters' dark sides. Since the main characters are vampires and other supernatural creatures, there's a lot of room to dig into their more sinister natures. Also, redemption is a popular theme. Characters often try to make up for their past wrongdoings. There are also a lot of fanfictions that focus on the mystery aspect, like solving old mysteries in Mystic Falls that were not fully explored in the original book.
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.
They have a lot of chemistry in the show that wasn't fully explored. So in fanfiction, writers can delve deeper into their relationship.