Avatara

Avatara (アヴァターラ) are the 37 golems that guard and protect the Mausoleum, the vault containing the World Class Items of the Great Tomb of Nazarick.

Appearance
Avatara are sculptures created by Ainz based on the appearance of his former guild members. According to Ainz, his lack of skill allowed him to only capture ten percent of their charm.

Ainz purchased the external appearance data and forcibly installed it on to the golems. The end result was that the limbs either grew fatter, or became shortened. The heads grew massive and clown-like, like monsters from nightmares. However, this lack of cohesive unity in their appearances exuded a kind of strange atmosphere which gave people a strong sense of unease.

Abilities and Powers
Avatara are armed with super-powerful equipment and possess immense strength. They are designed to attack anyone who are in possession of a Ring of Ainz Ooal Gown.

Trivia

 * The 37 avatara are resemblance of the former guild members of Ainz Ooal Gown.
 * All of this avatara are memories of the former guild members after they retired from the game.
 * All the avatara were created by Momonga himself.
 * There are only four vacant spots left for creating their avatara which are Momonga, Herohero and two unnamed guild member of Ainz Ooal Gown.
 * Each Avatara is a place holder for the equipment of the guild member they are meant to represent.