Goriguro

He goes by the name "Death face with crawling maggots", alias "Necroface". He is part of Maya Union's Tokuwa Corps, and wears his mark stabbed into his own head.
True to his Goriguro (Grotesque) name, he has a dark discolored skin, rotting smell and this somehow still alive but utterly decayed human flesh; he is probably some type of zombie.
The holder of the "Crane's Record". He

Spoiler

killed Fujimiya Masaki for arbitrarily leaving and not properly guiding Lavice.