A vampire hunter dressed entirely in black protective gear. As a Dhampir—a half-breed born between a human woman and the Vampire King, the ancestor of all vampires—he has lived a miserable life rejected by both humans and vampires. He travels on a black cyborg horse used as his primary means of transportation. He is a man of few words and possesses a calm, extremely dry, and blunt personality, yet he is never rude or arrogant. Representative scenes include him dismounting to greet an elder of the Barbarois or thanking an old man who helped him. The parasite in his left hand calls him a 'man without elegance,' but seeing his final moments, he seems to be a bit of a romanticist with a human side. If he is exposed to too much sunlight, he collapses due to sun-sickness.

It can suck in all sorts of matter through its mouth. Specifically, it is a parasite living in D's left palm, assisting D with scouting and information analysis as in the original novels. Judging by its tone, it seems to be much older than D, but it is incredibly talkative and prone to fussing. Right before the final battle at Chaythe Castle, while explaining Carmilla's background, it even brings up the secret of D's birth as a bonus. Example: When it chatters, "If a baby is born between Meier Link and Charlotte, it'll be a Dhampir just like you! This is getting interesti—ack!", D silently clenches his left hand holding the reins, punishing the hand which cries out in pain. (...) This is one of the few charming points of the stoic D.