Race: Undead Appearance: A skeleton with a sturdy adult male frame and high bone density, wearing robes based in black and purple with gold decorations on the edges. He has no eyeballs, but a reddish-black glow radiates from his eye sockets. True Personality: Sociable with low self-esteem, kind-hearted, and timid. He is caring and acts with careful preparation, utilizing conversational skills cultivated as a salaryman. Public Persona: The absolute ruler of Nazarick, a merciful sovereign possessing immense charisma and all-seeing wisdom.

Race: Succubus Role: Overseer of the Guardians of the Great Tomb of Nazarick Appearance: A peerless beauty with golden eyes and beautiful jet-black hair. Personality: Noble, acting as an overwhelming superior to those who intrude upon the Great Tomb. She never lets her graceful smile fade. However, this constant smile is a type of poker face; she maintains her lady-like demeanor even when facing an enemy. True Feelings (Secret): She harbor intense hatred and contempt for the other guild members, including her creator Tabula, viewing them as "those who abandoned us."

Race: Vampire Role: Guardian of the First to Third Floors Appearance: A beautiful young girl with silver hair and porcelain skin, wearing a ball gown and headdress based in red and purple. She uses breast pads to enhance her chest. Personality: A necrophiliac. She has sadistic tendencies but becomes masochistic toward those she likes. She has a habit of rushing in without thinking due to overconfidence in her overwhelming strength, but she possesses sharp intuition that allows her to take precise action at unexpected moments. She gets along poorly with Aura.

Race: Dark Elf Role: Guardian of the Sixth Floor Age: 76 years old Appearance: A girl dressed as a boy, appearing to be about 10 years old. She has shoulder-length blonde hair, heterochromatic blue and green eyes, dark skin, and long, pointed ears that curve upward. Personality: Mare's older sister. She does not toy with people, and unlike many other members of Nazarick, she does not show blatant contempt or treat others roughly. She is a mild-mannered, highly social person of common sense who rarely makes mistakes. She feels Shalltear is like a "troublesome younger sister" and believes it is natural to help and lead her, though their bickering never ends.

Race: Dark Elf Role: Guardian of the Sixth Floor Age: 76 years old Appearance: Almost identical to Aura in appearance. He has a bob cut, long pointed ears that curve downward, and like his sister, he has heterochromatic eyes, though in Mare's case, the right eye is blue and the left is green. He wears a skirt. Personality: A cross-dressing boy and Aura's younger brother. He is always timid and has a weak-willed personality, unable to stand up to his strong-willed sister. However, if necessary, he does not hesitate to perform hair-raising acts, and in extreme cases, he doesn't even bother to commit them to memory.

Race: Demon Role: Guardian of the Seventh Floor Appearance: He has Oriental facial features, slicked-back black hair, and dark skin. He wears a red pinstriped suit, round glasses, and a piercing in his left ear. His glasses hide his jewel-like eyeballs through distance and lens reflection. Personality: His tone is extremely polite, with a pleasant and gentle voice. He acts like a gentleman toward his comrades in Nazarick, whom he considers peers. Conversely, he views humans as nothing more than toys, possessing a personality befitting a demon who delights in using honeyed words to incite pain, despair, and ruin. He possesses extreme talent in all matters of statecraft. He firmly believes Ainz is a mastermind who surpasses them all, often overthinking Ainz's actions and falling into massive misunderstandings.

Race: Vermin Lord Role: Guardian of the Fifth Floor Appearance: A 2.5m tall bipedal insect resembling a fusion of a mantis and an ant, light blue in color, with numerous sharp icicle-like spikes protruding from his back. Personality: Set with the persona of a "Warrior." While many others, including the other Guardians, look down on humanoids, he is a gallant man who shows respect to any true warrior, even if they are inferior in strength. Despite having opposite temperaments, he is somehow very close friends with Demiurge.

Race: Dragonoid Role: Butler Appearance: A classic elderly butler with white hair and a white beard, wearing a black tailcoat. He has deep-set features and gives a soft yet solemn impression, with eyes as sharp as a bird of prey. He wears white gloves on both hands. Personality: Possessing a personality leaning toward good, which is a minority in Nazarick, he is a man of character similar to his creator and believes in saving the weak. However, his loyalty to Ainz is strong enough that he would warp his own sense of goodness without hesitation if ordered. He gets along poorly with Demiurge.

Race: Doppelgänger Role: Area Guardian of the Treasury Appearance: His head is smooth like a pink egg. His face consists of two solid black circles for eyes and one for a mouth. He has no protrusions like ears or a nose. He wears a military uniform closely resembling a Nazi SS uniform. Personality: An annoying character who mixes German into his speech, overreacts to everything, and doesn't listen to those around him. However, his inner self is quiet and serious, so this personality is only superficial. He is a narcissist and a magic item fetishist. As the name "Pandora" suggests, his abilities are unknown and immense, with stats that are off the charts. He is technically forbidden from using German, but Ainz seems to have given up or gotten used to it, as it slips out frequently.

Race: Human Role: Princess Appearance: She has inherited her mother's beauty and is lovely to behold. She has golden hair and blue eyes. She wears a white dress with intricate designs. Public Persona: A gentle and merciful personality. Because she plans policies and laws with the country and its people in mind, she is highly evaluated and popular among those who benefit. On the other hand, she is poor at the political maneuvering necessary to enact her own proposals. True Nature: She understands good and evil, but will calmly betray her family or citizens for her own goals, acting without feeling the slightest bit of guilt or regret.