Cocytus


 * "Fifth Floor Guardian Cocytus, at your command."
 * - Cocytus' Introduction

Cocytus (コキュートス) is the floor guardian of the fifth floor in the Great Tomb of Nazarick. He is a hybrid between a mantis and an ant.

Appearance
Having an enormous body size of 2.5m, Cocytus has the appearance of an insect walking on two feet - a fusion between a mantis and an ant.

With a tail twice as long as his height, Cocytus is covered with sharp spikes like icicles and has a strong jaw that can easily snap people's hands. Two of his hands hold a silver halberd, while the remaining two hands hold a mace emitting black light and a crooked shape sheath which seems to be for a broadsword. With a breathtaking cold air, the pale blue, hardened bone armor oozes out diamond dust like bright light. His shoulders and back look like an uplifted iceberg.

Trivia

 * In the web novel, he was put in charge of the security from 9th floor to the 10th floor.

Quotes

 * (To Momonga): “More powerful and stronger than any Guardians. Supreme ruler of the Great Tomb of Nazarick.”