In some fanfictions, other members of the Cullen family can also be important secondary characters. For instance, Edward might play a significant role. He could be either a source of conflict, as he has his own feelings for Bella, or a mediator, trying to understand the strange attraction between Carlisle and Bella. Also, Esme, Carlisle's wife in the original story, could be a character that adds more complexity to the situation. Her reaction to Carlisle's feelings for Bella could range from heartbreak to acceptance, depending on how the author writes it.
The Cullen family members are important characters too. Edward, for example, might have an interesting dynamic with Bella in this fanfiction. He could be either protective or jealous of Carlisle's special relationship with her.
There could be Edward. Even though the focus is on Carlisle and Bella, Edward's presence might still be felt as he was an important part of Bella's life before. His reactions to Carlisle and Bella's relationship could add some drama.
Well, of course, there's Dark Carlisle, who might be a character with a shadowy past and different moral compasses compared to the regular Carlisle. And then there's Bella. She is often portrayed as the one who tries to understand Dark Carlisle, bringing out different sides of him. There could also be other supporting characters from the Twilight universe, like the other members of the Cullen family, who might react differently to Dark Carlisle and Bella's relationship.
Mainly, it's Carlisle, a sophisticated and noble vampire, and Bella, a character full of curiosity and love. Their relationship is central. But we can't forget about the other vampires in their world. For example, Edward could be an interesting character in this fanfiction. He was once in love with Bella, and his reaction to her being with Carlisle could add a layer of drama. Also, Esme, Carlisle's adoptive mother in a sense, could play a role in either accepting or having some doubts about their union.
Some fanfictions might explore a plot where Carlisle and Bella are forced to be together in a situation where they have to rely on each other for survival. Maybe they are trapped in a dangerous place filled with other menacing vampires or some other supernatural threat. This would lead to them bonding on a deeper level and their relationship evolving in a way that is different from the typical courtship.
One common theme is protection. Carlisle often takes on the role of protecting Bella in these fanfictions. Another theme could be the exploration of an unconventional relationship, as their relationship in the original series was not as central as it can be in fanfiction.
Then there's Author C. What makes their works stand out is the creativity in medical scenarios. They come up with really unique medical situations for Bella and Carlisle to face. Their stories are full of twists and turns, and they manage to keep the readers on the edge of their seats while still maintaining the essence of the bella and carlisle doctor fanfiction genre.
Often, it starts with an unexpected encounter or a moment of realization. Maybe Carlisle sees Bella in a new light, not just as Edward's girlfriend but as an individual with her own charm. Then, there are small gestures of kindness and understanding between them that gradually build up the relationship.
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.
Since we don't have more details about this specific 'the love affair fanfiction', it could be any characters. It might be the main characters from the original work it's based on, or it could be secondary characters that the author decided to focus on for this love story.