At first, it might be a bit rocky. Bella, being human and now blind, is in a very vulnerable state. Caius, as a powerful vampire, may come off as intimidating. But as time goes on, they start to develop a deep bond. Caius learns to be more gentle and caring, and Bella starts to trust him more and more.
Well, Caius could be very possessive and see Bella's blindness as something that makes her even more his. He would be by her side all the time, guiding her physically when needed. He might also share his vampire senses with her in some way, like describing the world around them in vivid detail so that she can 'see' through his words. And he would definitely be very angry if anyone made fun of or took advantage of her blindness.
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.
Bella, a character known from the Twilight series, is one of the main characters. She is usually the focus of the story's emotional arc. Caius, from the Volturi, is the other main character. His actions and decisions, especially in relation to Bella, form the core of the conflict and development in the fanfiction. Their personalities, which are often a blend of what we know from the original source and new interpretations, are what make these stories interesting.
Often, bella x caius fanfiction features a relationship that is somewhat dark and intense. Caius being part of the Volturi has his own set of power and authority, which adds an element of danger to the relationship with Bella.
One great Caius Volturi and Bella fanfiction is 'The Volturi's Obsession'. It explores an alternate universe where Caius has a more complex relationship with Bella. Another is 'Caius and Bella: A Forbidden Bond' which delves into the challenges they face due to their different natures.
I'm not sure who the absolute best is, but some popular authors in the fanfiction community might be those who have a deep understanding of the 'Twilight' universe and can write believable interactions between Caius and Bella. Look for authors with a lot of positive reviews and high ratings on fanfiction websites.
There are some. However, the quality can vary greatly. Some fanfictions might focus on the emotional aspects of this new family connection, while others could be more action - packed, perhaps involving Bella's new role in the Volturi family if Caius is her father. It really depends on what you're looking for in a 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.
In such a fanfiction, it could completely change the dynamics of the Twilight universe. Caius, being a powerful and somewhat cruel vampire in the Volturi, as Bella's father would bring a whole new set of storylines. Maybe he would be overly protective in a very different way compared to Charlie. He might use his vampire powers to keep Bella in a sort of 'gilded cage' for her safety, which could lead to a lot of conflict with the Cullens and other characters. It could also explore how Bella's character would develop differently, growing up with a vampire father and the knowledge of the vampire world from a very different perspective.