Overlord,Albedo

Albedo (アルベド) is the Overseer of the Guardians of the Great Tomb of Nazarick. She is in charge of the general management and supervises the activities of the seven Floor Guardians, meaning that she ranks above all the other NPCs in Nazarick. She is the middle sister of the older sister Nigredo and younger sister Rubedo. Along with her sisters, she was created by Tabula Smaragdina