The head of the Ainz Ooal Gown guild and the ruler of the Great Tomb of Nazarick. When the DMMO-RPG Yggdrasil shuts down, he is transported to another world, still in the form of his skeletal avatar.

One of the NPCs that serves the Almighty 41 Supreme Beings, she is the Overseer of the Floor Guardians of the Great Tomb of Nazarick and stands at the top of all NPCs. She is an extremely beautiful woman but, possibly due to Momonga changing some of her settings, she has an extremely disappointing side...

One of the NPCs that serves the Almighty 41 Supreme Beings and the Floor Guardian of the first to third floors in the Great Tomb of Nazarick. A so-called vampire, she has the appearance of a young girl, but in one-on-one battles she is the strongest of the Floor Guardians. She has very strange taste, and absolutely adores Momonga.

One of the NPCs that serves the Almighty 41 Supreme Beings and the Floor Guardian of the 6th floor in the Great Tomb of Nazarick. A young girl whose defining feature is her different-coloured eyes, she cross-dresses due to the playful nature of the player that created her. She’s always cheerful and full of energy. Mare is her younger brother.

One of the NPCs that serves the Almighty 41 Supreme Beings and the Floor Guardian of the 6th floor in the Great Tomb of Nazarick. Just like Aura, this young man has different-coloured eyes and is crossdressing due to his creator. He’s timid and always hesitant, and can’t go against his older sister.

One of the NPCs that serves the Almighty 41 Supreme Beings and the Floor Guardian of the 7th floor in the Great Tomb of Nazarick. He has an extremely rare intellect and is involved in various plans and strategies related to Nazarick. He has absolute devotion to Momonga and will show no mercy towards those who try to stand in his way, even if their his relatives.

One of the NPCs that serves the Almighty 41 Supreme Beings and the Floor Guardian of the 5th floor in the Great Tomb of Nazarick. He’s a giant, grotesque looking guardian whose appearance evokes the image of an insect walking on two feet. He’s a warrior through and through; no matter how weak or inferior his opponents may be, he respects those who have the fighting spirit of a warrior.