The number of Vampire Hunter D novels varies depending on different editions and releases. Generally, there are around a dozen or so. However, this can change over time with new additions to the series.
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.
A classic quote from Vampire Hunter D's novel:
In the dark night, a pair of silver eyes flashed with a cold light. A vampire hunter appeared in front of the world. His name was Arwen.
Arwen took a deep breath to make his vampire ability stronger." I'm a vampire hunter. My goal is to destroy all vampires."
A huge werewolf gradually appeared behind him. The werewolf's name was Dio, and he was Arwen's good friend.
"Arvin, you look tired. Do you need a rest?" Dio patted Arwen's shoulder.
" No, I'm not tired. I'm bored. I've been tracking these vampires for hundreds of years, and now I want to take a break." Arwen replied.
"But you haven't defeated me yet. I am the strongest vampire hunter. Let's have a showdown." Dio challenged.
" Alright then, let's have a showdown. But I won't let you win so easily." Arwen smiled.
The intense battle between the two vampires and the werewolf began. Their blood was boiling and their strength was incomparably powerful.
Arwen used his ability to attack Dio and Dio used his werewolf ability to counterattack. Their battle was unusually intense until only one was left.
Arwen opened his eyes and looked at Dio. Now, you will become my captive."