In such fanfiction, the slow - burning aspect of their love is significant. It's not instant but builds over time. Carlisle's restraint as a vampire who has lived for a long time and Bella's growing understanding of his world create a unique dynamic. Also, the idea of Bella being a bridge between Carlisle and the human world he once knew can be an important part of the story. It gives a sense of connection and nostalgia for Carlisle, which deepens his feelings for Bella.
Another element is the emotional connection. Despite Carlisle's dominance, there's a deep emotional bond between him and Bella. In some fanfictions, this is shown through Carlisle's internal struggle. He wants to protect her but also respects her free will. So, he has to balance his dominant nature with his love for her. It makes for a complex and interesting relationship.
Typically, the relationships between the characters are a key element. It could be the unspoken tensions or the deep - seated affections they have for each other. Also, the way their different personalities interact, like Bella's naivete, Esme's motherly nature, and Carlisle's calm leadership.
One key element is character development. The fanfiction should show how Bella and Carlisle's relationship evolves over time. Another is the build - up to the kiss. It should be filled with anticipation and tension. For example, in some stories, they might be forced to confront their feelings due to a dangerous situation.
One key element is the exploration of forbidden relationships. Since Bella has a certain relationship with Charlie already and Carlisle is in a different position, their interactions are often against the norms. Another element is the emotional conflict. Characters like Carlisle may struggle with his vampire nature and the new feelings he has for Bella.
In the fanfiction, Carlisle's sense of duty to his family and the vampire code might be a hurdle. He has to balance his feelings for Bella with his responsibilities to the Cullen family. Also, Bella's own human life and her relationships with other humans, like her father, could be a complication. How can she maintain those relationships while being in love with Carlisle? There's also the issue of secrecy. Their relationship has to be kept hidden from the outside world to protect both of them.
The vampire lore within the fanfic is also a key element. Since Carlisle and Esme are vampires, how their vampiric nature affects their relationship with Bella, like their self - control around her human blood, is often explored. And also, the way Bella adapts to this world of vampires which they are a part of.
In some fanfictions, their relationship might start with Carlisle being drawn to Bella's unique spirit. He, as an older and more experienced vampire, is intrigued by her resilience. Maybe he first notices her when she enters the Cullen family's orbit, and from there, a slow - burning attraction begins to form as they interact more and get to know each other on a deeper level.
In many such fanfictions, a key plot point could be the internal struggle Carlisle faces. He is a moral vampire, so turning Bella goes against his principles at first. He might worry about how Bella will adapt to the vampire life, with its bloodlust and the need to hide from humans. Another plot point could be Bella's reaction. She may be initially excited at the prospect of immortality and being with Edward forever, but then realizes the sacrifices she has to make, like leaving her human family behind.
One common theme could be the exploration of a forbidden or unexpected relationship. Since Carlisle is an older, more reserved character and Bella has her own set of relationships in the original series, this pairing is quite different. Another theme might be the re - imagining of the Twilight world's power dynamics and how this relationship would affect the other characters around them.
One popular theme is the forbidden love aspect. Since Carlisle is much older and in a different position in the vampire world compared to Bella, this creates a sense of the relationship being taboo, which makes for an interesting story.