Nigredo

Nigredo (ニグレド) is a NPC of Great Tomb of Nazarick. She is the older sister of Albedo and Spinel. Nigredo is imprisoned in a room in "Frozen Prison", 6th floor of Nazarick.

Appearance
She looks like Albedo, but she doesn't have face skin. Her eyes and teeth are beautiful, but it is meaningless considering that she doesn't have has no lip and eyelid. Her appearance scared the hell out of all the guild members of Ainz Ooal Gown.

Personality
Though she acts insane and attacks the visitor without mercy before the visitor gives her a baby-doll, Nigredo is guessed to be tender-hearted in normal condition. She and Festonear opposed to kill innocent people kidnapped from Re-Estize.

Abilities and Powers
She is a Magic Chanter that focus mainly on information gathering. She is called one of the NPCs with nearly highest level in Nazarick - so it can be guessed that her level is over 90.

Trivia

 * In the web novel, Nigredo doesn't exist and along with her sisters.
 * Nigredo name mean "Blackness".
 * Nigredo always warns Albedo that Spinel will make a big trouble to Nazarick someday, and calls Spinel "who made totally different with us".