Talk:Dhampir/@comment-2605:A000:BB88:EF00:8DF6:D19A:2E7C:32AF-20181126042134/@comment-3236835-20181126121656

When Alucard was introduced into the series (Castlevania III: Dracula's Curse), he was designed to be just the vampire son of Count Dracula; as such, he had similar powers, including immortality. According to the original Japanese storyline, Alucard became a vampire as a result of Dracula selling both of their souls to the Devil in exchange for power.

The whole "dhampir" element was later introduced in Castlevania: Symphony of the Night with the inclusion of Lisa into the storyline, making Alucard the product of the union between a vampire and a human. However, by that time, Alucard's prolonged lifespan had already been established into the series' lore, so probably that's the reason that feature was kept.

Interestingly enough, in some countries dhampirs are believed to be notably frail and to have a very short lifespan.