Cocytus

Cocytus protects the fifth floor of Nazarick. An insectoid warrior created by Takemikazuchi, he possesses a rare sense of honor compared to other inhabitants of the Great Tomb. He is a master combatant who maintains a vast collection of legendary armaments. By using his multiple limbs to wield several weapons at once, he executes high-speed attacks that make him the most efficient damage dealer among all the floor guardians.