Gelmud prided himself as a high-class Majin. He was the type of person who would hide his true intentions behinds the language of a polite gentleman.
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.
He is clearly above an A-rank.
He has a regeneration skill.
Shisha no Koushinenbu (Death March Dance).
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.
Rimuru Tempest: When Gelmud 1st heard of Rimuru and saw him he hated him in ruining his Plans in creating a New Demon Lord.
Geld: To Be Added.
Benimaru: To Be Added.
To Be Added.