A frequent theme is the adaptation to the supernatural world. The OC, usually a human - turned - or - newly - introduced - to - the - supernatural - being, has to adapt, and Carlisle is there to guide. This shows their relationship development. Additionally, the theme of secrets is prevalent. Carlisle has his secrets as a vampire, and the OC may have their own, and how they deal with each other's secrets is an interesting aspect in these fanfictions.
Another theme is family. Since they are part of a larger 'family' in the story's context, fanfictions often show how they contribute to and shape the family dynamic. They are sometimes portrayed as the stable core of the family, guiding and protecting the others.
One common theme is their eternal love. Since they are vampires, their love is often depicted as something that will last forever, defying time.
One common theme is the forbidden love aspect. Since Carlisle is a much older vampire and Bella is a young human, there's that sense of something not being allowed, which adds a lot of tension to the stories.
The theme of mutual understanding also pops up a lot. Since they are both intelligent and have a strong sense of morality in their respective stories, fanfictions often show them coming to understand each other's values and beliefs. This leads to a deeper bond between them as they respect and learn from one another.
The theme of sacrifice also appears frequently. Edward might sacrifice his own desires or safety for Carlisle, and vice versa. In some fanfictions, this is shown through them protecting each other from other powerful vampires or from the human world's threats. It's really interesting to see how these themes play out in different fan - created stories.
A frequent theme is the exploration of Carlisle's self - control. In fanfictions, his struggle to maintain his composure around Bella, especially given her alluring blood, is often highlighted. Also, the theme of Bella's growth and transformation under Carlisle's influence is common. She may become more confident, more in - tune with the vampire world, and this transformation is central to many stories.
Common themes in such fanfiction include the discovery of a deeper connection. Bella might initially be in love with Edward but then realize that her true soulmate is Carlisle. There's also the theme of Carlisle's struggle with his own moral code when it comes to loving Bella. He's always been so strict about his values, and this new - found love could make him question some of his long - held beliefs. Additionally, the idea of their love being a catalyst for change within the vampire community is often present, as they might inspire others to look at relationships and values differently.
One common theme is the exploration of family dynamics. Since Carlisle is sort of the father figure in the Cullen family, fanfictions often look at how he accepts or influences Bella's relationship with Edward within the family structure.
One common theme is the exploration of their different worlds. Harry comes from the wizarding world and Carlisle from the vampire world in Twilight. So, stories often deal with how they bridge that gap.
One common theme is family. Since they are all part of the Cullen family in the Twilight universe, many fanfictions explore how they interact as a family unit. For example, how Carlisle and Esme act as parental figures to Bella.