D is a dhampir, the half-breed child of a vampire father the legendary Vampire lord and human mother, therefore he makes the ideal vampire hunter. He is renowned for his consummate skill and unearthly grace, but feared and despised for his mixed lineage: born of both races but belonging to neither. Often underestimated by his opponents, D has surprising power and resourcefulness, possessing most of the strengths and only mild levels of vampiric weaknesses. Unlike most dhampirs, D is able to live as a "normal" human, though marked by his unearthly beauty and powerful aura, and thus rarely accepted by humans.

His only notable weaknesses are that he is, while not unfeeling, emotionally remote but sometimes sentimental. He is also (far more rarely than other dhampirs) randomly susceptible to sun-sickness, a severe type of sunstroke, about once every five years. Otherwise, D does not suffer from vampiric weaknesses usual to dhampirs, possessing an imposing supernatural aura to his opponents and godlike reflexes surpassing even vampires.

(Source: Wikipedia)