Cocytus/Relationships

Ainz Ooal Gown
When Demiurge brought up that they could serve Ainz possible future heir, he got interested and hope that he gets to be called 'uncle'. He self-describes himself as the 'sword' of Ainz Ooal Gown, an object that does as he is told without ever questioning his master.

Warrior Takemikazuchi
Warrior Takemikazuchi is Cocytus's creator and previous wielder of the God Slaying Emperor Blade.

Demiurge
As a fellow Floor Guardian, Demiurge is a colleague and at the same time a rival. Despite their rivalry for Ainz's attention and praise they have an stable work-relationship. They are civil to one another to be considered drinking partners at Sous-chef's bar on the ninth floor of Nazarick. He respects Demiurge intelligence and confides in him on deciphering Ainz's plans.