I don't know which book you're referring to. But if you tell me the name of the novel or the plot summary, I can try to provide you with a more accurate answer.
The obvious main characters would be the vampire and the pet. The vampire might be a centuries - old being with a complex personality. The pet could be a human who was turned into a sort of 'pet' or an actual animal with special powers. There could also be antagonists, such as vampire hunters who are after the vampire and see the pet as either an accomplice or a victim in need of rescue. Additionally, there could be other supernatural beings in the story that interact with the main characters, like werewolves or witches.
The main characters are obviously the vampire and the caregiver. The vampire could be of different types, like a newly - turned vampire who is confused and scared, or an ancient vampire who is jaded but still has a glimmer of humanity left. The caregiver could be a kind - hearted human, perhaps a nurse or a social worker by profession.
Sheridan Le Fanu was another significant figure. He wrote 'Carmilla' which was one of the early vampire novels. Published in 1872, it was very influential in the 1880s vampire literature scene. His portrayal of the female vampire Carmilla was quite different from the traditional male - dominated vampire image at that time. It explored themes of female sexuality in a rather veiled yet subversive way.
Stephenie Meyer is very well - known for her 'Twilight' series. Her books brought a new wave of vampire romance to a wide audience. L. J. Smith is another, with her 'The Vampire Diaries' series. Charlaine Harris is also famous for the 'Sookie Stackhouse' series.
The most famous main character is Dracula. He is the powerful vampire who drives much of the plot. Then there's Jonathan Harker, a young solicitor who gets caught up in Dracula's world. And Mina Murray, who is important in the fight against Dracula.
It could be another vampire. Maybe a powerful and mysterious male vampire who is both her rival and her love interest. Their relationship could be full of passion and conflict.
A powerful elder vampire who opposes the prince's ideas of change within the vampire community. This elder might see the prince as a threat to the traditional vampire ways and will stop at nothing to undermine him.
The main character could be a half - vampire, half - human. Struggling with his dual nature, he tries to find a balance between the vampire's need for bloodshed and his human side's aversion to it. Also, an ancient vampire with a conscience could be a main character. She has seen too much bloodshed over the centuries and decides to take a stand against it.