Cocytus

The guardian of the fifth level of Nazarick, "Glacier." He has a gigantic bipedal insect appearance mixed with a demonic impression. His entire light blue body always exudes cold air, and he is covered with sharp spikes on his surface and tail. With four arms, each wielding a different weapon, his offensive power when armed is unparalleled among the guardians, and he is also a magic warrior capable of casting certain spells.

His harsh appearance, reminiscent of armor, matches his rough and martial personality. He pays respect to brave warriors even if they are of lesser rank. He knows all the weapons of "The Supreme Beings" and his observational skills as a warrior surpass even Albedo. His speech, excluding kanji, is hard and written in katakana.

While he is strict and straightforward, he has quirky aspects like dreaming of serving as a "grandfather" to Ainz's children. Despite having an opposite personality, he somehow gets along well with Demiurge.