Definitely. The idea of Vampire Hunter D taking on Dracula is a very appealing one for fanfiction creators. There are so many directions to take it. For example, they could write about how D would deal with Dracula's minions first. Or they could focus on the psychological battle between the two. Since D is a dhampir, half - vampire half - human, his internal struggle when facing Dracula, who represents pure vampiric power, could be a great point of interest in fanfictions.
One interesting plot twist could be that Dracula is actually D's long - lost father. This would completely change the dynamic between the two and add a whole new layer of conflict. D, who has been hunting vampires all his life, would be forced to reevaluate his actions.
A fanfiction might focus on Doris' relationship with the people in her village. It could show how her life was before D's arrival, her daily routines, and how she was seen by the villagers. For example, perhaps she was a bit of an outcast because of her family's past, and this could add more depth to her character.
The theme of mystery is quite prevalent in 'vampire hunter d fanfiction'. D's past, the origins of the vampires, and the strange powers and artifacts that are often involved in the stories are all shrouded in mystery. Another theme is survival. D has to constantly survive in a world full of dangerous vampires, and the humans he tries to protect also have to fight for their survival. And the theme of the supernatural is of course a given, with all the vampire lore and D's own unique abilities.
Yes, there are some really interesting 'Vampire Hunter D Castlevania' fanfictions out there. You can often find them on fanfiction websites. Some might focus on crossovers between the two universes, like having D interact with the characters from Castlevania. Others might explore new storylines inspired by the unique elements of both.
Friendship and loneliness are themes as well. D is often a solitary figure in his hunting, but sometimes he forms unexpected friendships or alliances. Some fanfictions explore how these relationships affect D and his mission. There is also the theme of the unknown and the supernatural world that D is constantly exploring, which adds an element of mystery to the stories.