Five Rulers

Five Rulers were a group of monsters that originally inhabited the Great Tomb of Nazarick before it was conquered by Ainz Ooal Gown.

Background
The Five Rulers were five powerful monsters that were designated by the Lord of Helheim to protect the five zones of the Great Tomb of Nazarick.

Strength
The bosses encountered by the members of Ainz Ooal Gown noted that they had different abilities, appearances, and boss rooms.

Members

 * Pure White Bat: This monster guarded the Underground Lake Floor.
 * Dragon: This monster guarded the Volcanic Floor.
 * Asura: This monster guarded the Tomb Floor.

Trivia

 * After Ainz Ooal Gown conquered the dungeon, it is unknown what became of the bosses.