Muten (無天, Muuten) is a member of the Deathgaze Pirates, who oversees the physical and mental wellbeing of his comrades, as the one who holds the role of the crews doctor. Due to the nature of his experiments and medical research, muten is called the King Of Zombies (ゾンビの王, Zonbi No Ou), as the man who is responsible for the creation and proliferation of the monolith virus which mass-produces undead creatures on its own without the need of being guided.