Aureole Omega

Lastborn of Pleiades is an Area Guardian of the Cherry Blossom Sanctuary and the leader of the "Pleiades Seven Sisters", the battle maid squad of the Great Tomb of Nazarick.

She is in charge of the Teleportation Gates in Nazarick and protecting the Staff of Ainz Ooal Gown in the Cherry Blossom Sanctuary.

Background
Lastborn of Pleiades is the leader of the "Pleiades Seven Sisters" and the Area Guardian of the Cherry Blossom Sanctuary that controls all the teleportation gates in Nazarick. She is the only human NPC of Nazarick that possesses an eternal life. Her name and other detailed information are unknown.

The Men in the Kingdom Arc
Ainz switches the Pleiades from the Six Stars to the Seven Sisters. While so, Ainz does not allow the Lastborn to move from her current position and thus Yuri Alpha becomes temporary leader of the Seven Sisters.

Abilities and Powers
As an area guardian, she is in charge of overseeing all the teleportation gates in Nazarick. If an intruder attempt to use it, She will teleport or divert the intruders that using the portal to the isolation area of her choice. When Ainz switches the Pleiades from the Six Stars to the Seven Sisters System, she is now the leader of the Pleiades.

Ainz Ooal Gown
She is entrusted with the protection of the Staff of Ainz Ooal Gown in the Cherry Blossom Sanctuary when it is not in the possession of Ainz.

Trivia

 * There is an unknown female NPC in the picture of all 100 level NPCs in Nazarick. As the NPC's clothes is similar to that of miko (Japanese female shaman).