Lord of Helheim

Lord of Helheim was an NPC that inhabited the world of Helheim in YGGDRASIL prior to the game's shutdown.

Appearance
Lord of Helheim is described to be a bearded old man by a guild member of Ainz Ooal Gown.

Background
The Lord of Helheim seems to be in charge of the administration of the world Helheim. One of his duties is announcing challenges to players who enter new dungeons like the Great Tomb of Nazarick.

Overlord Prologue Arc
Because Ainz Ooal Gown arrived before the stone statues, it triggered an automated sequence wherein which it summoned the Lord of Helheim to their designated location and confronting the guild members in the process.

Abilities and Powers
The Lord of Helheim is hinted to be very strong, since a unknown guild member of Ainz Ooal Gown suggested using Longinus, a Twenty-type World Item to eliminate him.

Trivia

 * Its possible Bukubukuchagama personally knows who the Lord of Helheim is or at least the voice actor or seiyu is as she sarcastically said, "Yes boss".
 * It is currently unclear whether the Lord of Helheim is one of the boss enemies that got in the way of Ainz Ooal Gown while conquering the Great Tomb of Nazarick.

Quotes

 * (To Ainz Ooal Gown): “You who desire this land. Defeat us, and show us your true power.”