It is indeed common. The allure of the vampire, despite being the hunted, and the hunter's own humanity that allows for love to bloom creates a complex and interesting dynamic. This kind of relationship in these novels often explores themes of acceptance, sacrifice, and the power of love to overcome differences. It also provides a fresh take on the traditional vampire - human relationship, making the story more engaging and multi - faceted.
Van Helsing from 'Dracula' is very iconic. He's a knowledgeable and fearless vampire hunter, using his medical and occult knowledge to combat Dracula. Another is Buffy from 'Buffy the Vampire Slayer' series. She's a modern - day slayer, a girl with super strength and skills to take on vampires. And D from 'The Vampire Hunter D' series, with his mysterious dhampir nature and his cool sword - fighting skills against vampires.
One common theme is the forbidden love aspect. Since D is a dhampir and there are so many differences between him and a normal human (the reader), their relationship is often seen as something that goes against the norm.
I highly recommend "Your Highness Vampire, Please Have Respect". The female protagonist of this fantasy and magical fantasy novel, Fanjo Man, was a vampire duke, but she was sent to a school for demons and vampires. The rulers of the demon world and the vampire world fell in love with her at the same time, but the heroine loved both of them. Later, the female protagonist mysteriously disappeared, and the demon ruler and the vampire ruler joined forces to find her. After finding her, they found that she was the person they were looking for. There were demons, vampires, and princes in this novel. It was exciting and romantic enough! I hope you like my recommendation. Muah ~
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There's 'The Vampire Diaries'. Elena falls for Stefan, a vampire, and later Damon as well. The love triangle between them is a major part of the story. Also, 'Dark Lover' by J. R. Ward has a story that involves vampire - like creatures and some romantic elements.