Love against all odds is also a big theme. Given that Bella and Caius come from very different worlds and have different natures, their relationship is often portrayed as something that defies the norms and faces many obstacles, which makes for a very compelling story.
One common theme is the struggle between different vampire clans. Since Caius is part of the Volturi and Bella has her own connections, this often creates a backdrop of power struggles and politics in the fanfiction.
One common theme is the struggle against the odds. Since their relationship might not be accepted easily in the vampire world, they often have to fight for their love.
One common theme is the struggle against the odds. Since Bella and Caius are from different 'worlds' in a sense, they often have to face opposition from other vampires or even Bella's human friends. Another theme is the discovery of a deep, new connection. It's about how they come to realize their bond as mates.
Love against all odds is also a big theme. Caius is part of the Volturi, which makes their relationship controversial. But in many fanfictions, their love overcomes these obstacles. They find a way to be together despite the expectations and rules of the vampire society.
One common theme is identity. Bella has to re - define who she is as Caius' sister instead of just being Edward's love interest. Another theme is family loyalty. She has to figure out where her loyalties lie between the Cullens and the Volturi.
The themes of transformation and self - discovery are quite common. Bella's transformation into a vampire (if it occurs in the fanfic) and how that affects her relationship with Caius is often explored. Caius, too, may go through a form of self - discovery as he gets involved with Bella. Another theme is the struggle against fate. Their relationship is often seen as something that is not meant to be according to the rules of their world, but they fight against that in the fanfiction.
One common theme could be friendship. How they interact as friends and support each other. Another might be adventure, like going on quests together.
Common themes include the power of love over differences. Caius and Bella come from different backgrounds and have different personalities. But their true mate bond makes them overcome these differences. Another theme is protection. Caius, being a powerful vampire, would want to protect Bella from all threats, whether it be from other vampires or from the human world she still has ties to. And there's also the theme of transformation, not just in the literal vampire sense, but in how they both transform as individuals in the relationship. They grow, change, and adapt to be with each other.
Love triangles are a big part of these fanfictions. Bella is in a unique position with Carlisle and Caius. There's also the theme of self - discovery. As Bella navigates this new relationship, she discovers new sides of herself. And the theme of family is there too, as Carlisle has his own family and Caius has his own group, and Bella has to find her place within these complex family structures.
One common theme is power dynamics. Aro, Caius, and Marcus are powerful vampires in the Volturi, and Bella is a human with a special connection. Their interactions often involve power struggles and negotiations.
One common theme is power dynamics. Given the different natures and positions of these characters in the Twilight - related lore, how they interact in terms of power is often explored. For example, Aro's leadership in the Volturi and how Bella's presence might disrupt or change things.