Skull

Skulls are the guardians and caretakers of the Earl's Akuma-producing plant. Skulls are humanoids who wear large black robes and have skull-like heads, as their names imply. Skulls are neither Akuma, nor completely human, and are created by transforming a human with a 'suitable' mind using a special form of magic. A Skull places their fingers against the forehead of a victim and chant an incantation. The human is then surrounded by arcs of energy and then shrouded in a cocoon made of a black thread-like substance, finally emerging a few moments later as a Skull. Skulls are very resistant, capable of taking a bullet to the head without any lasting damage. The newborns are quite slow, but the older ones function at a more grown human rate. They have an average lifespan of 200 years. Their duties include cleaning the Noah's Ark, creating Akuma, guarding the egg, and other odd jobs.