Barkus

Barkus was the stern, bureaucratic administrator of the Servant Allocation Center in Vault City. He was responsible for overseeing Servant work throughout the city, their assignments as well as acquisition. All the city's servants, old and new, came through his workplace and anyone seeking one would have to go through him.

As many officials in the post-nuclear world, Barkus was a corrupt person. A hefty bribe would allow one to ask anything Servant-related and have it done swiftly. That was one of the ways in which Joshua could be freed by the Chosen One.