He watched over the human race and helped prevent the Black Beast from destroying them, as well as sealing Yūki Terumi inside the Boundary before the Six Heroes were formed. Rachel Alucard is his daughter, and Valkenhayn R. Hellsing served as his butler before (and after) working with the Six Heroes. During the events of Phase 0, Clavis hired Jubei to recover the prime fields, however, the mission failed, resulting in the appearance of the Black Beast. He then ordered Jubei to search for Shūichirō Ayatsuki and to capture him in order to interrogate him. According to Shūichirō's logs, the 'Original Unit' came from the Alucard family.