Gelmud

Gelmudo is a former high-class Devil that served Demon Lord Clayman of the Ten Demon Lords. He wanted to make Orc Lord  the new Demon Lord and manipulate him  but instead was devoured by it.

Personality
Gelmudo prided himself as a high-class devil. He was the type of person who would hide his true intentions behinds the language of a polite gentleman.

Background
For 300 years, he had been planning a species war. However, Veldora's disappearance caused the plans to spiral out of control. So he gave up on having a war between the named monsters born from the goblins, lizardmen, and other such races. Instead, he sent out the Orc Lord.

The Orc Lord had lopped off his head with a butcher knife. Ripping his body up, he ate him. He died like a small fry.

Abilities
He is clearly above an A rank.

He has a regeneration skill.

Skills
Shisha no Koushinenbu (Death March Dance)

Relationships
Orc Lord: The Orc Lord was loyal to his order. Hence, he planned to make him the new Demon Lord and manipulate him from behind the scenes.