Well, a frequent theme is the exploration of different vampire cultures. Caius being part of the Volturi, his relationship with Bella can show how different vampire groups interact. Also, the theme of redemption can be present. Maybe Caius is seen as a rather cruel character in the original, but in fanfiction, his relationship with Bella can lead to a path of redemption for him. And of course, there's always the theme of love defying boundaries, as their union would be quite unexpected in the context of the Twilight world.
Yes, there are quite a few. Some popular ones can be found on fanfiction.net. You can search using the tags 'Bella Swan' and 'Caius Volturi' to narrow down the results. They often explore unique relationships and storylines within the Twilight universe.
Another theme is the exploration of the Volturi world through Bella's eyes. Since she was not initially part of the Volturi, her perspective can be used to show the reader more about their customs, politics, and how Caius fits into all of that. This can range from descriptions of the Volturi castle to the complex relationships between the Volturi members as Bella experiences them while getting closer to Caius.
One interesting plotline could be Bella's struggle to adapt to the Volturi lifestyle while being Caius' mate. She might face opposition from the other Volturi members, adding drama.
In many fanfictions, Bella starts to understand the complex world of the Volturi better. She learns about their laws, politics, and hierarchies. Caius, in turn, begins to see Bella not just as a mate but as an equal. He might start to value her opinions more and include her in Volturi affairs. For instance, Bella could use her knowledge of the human world to help Caius make decisions regarding vampire - human relations.
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 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.
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.
The theme of transformation is also common. Bella may be transformed not just physically into a vampire but also in terms of her understanding of the vampire world, especially the complex and often harsh world of the Volturi. This transformation can be both positive and negative. It can lead to her becoming more powerful and confident, but it may also make her lose some of her human qualities that she once held dear. Fanfictions play with these ideas to create engaging stories.
They're an interesting pairing because they are so different. Caius is from the ancient and powerful Volturi, with a strict view of vampire laws, while Bella is a human - turned - vampire with a very different moral compass. This contrast can lead to really engaging storylines in fanfiction.
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.