very little is known of d's past and the identity of his parents is ambiguous, but his innate power suggests that his father is an extraordinarily powerful vampire. regarding d's birth, some nobles whisper dark rumors about their vampire progenitor, the sacred ancestor known as count dracula, bedding a human woman called "mina the fair" (implied to be mina harker). dracula conducted bizarre crossbreeding experiments involving himself and countless human women or even other vampires, with the only successful product of the experiments being d. d, wanting nothing to do with his father save for killing him, refuses to go by his true name. instead, he shortens it to the first letter. in "twin shadowed knight" it is revealed that d has a twin who goes unnamed. the twin states that he and d were born from the same woman in exactly the same conditions.