The Skull (頭蓋, Zugai) is the pseudo-living remains of somebody that Hans Marco had attempted to perform Human Transmutation on. The corpse of a previous acquaintance of Hans', the scientist beheaded him while still alive and used his remains in an attempt to perfect his theory. The results proved disastrous, leaving the subject nothing more than a skull damned to suffer eternal pain in life that does nothing more then beg for its own death every waking moment of its life.