Count Femel

Count Femel (フェメール伯) was a noble of the Baharuth Empire. His full name is still unrevealed.

Background
Count Femel is a noble who survived the purge of the Bloody Emperor that costantly seeks his favor.

The Invaders of the Large Tomb Arc
As Count Femel is losing the Emperor's confidence, he tries to regain the Emperor's faith by carrying out a secret quest - employing various workers, including Foresight, to explore and investigate a mysterious Large Tomb.

The Magic Caster of Destroy Arc
After his actions, the Emperor decided to dismiss Femel and used him as the scapegoat for the doomed to fail invasion of Nazarick. Once beheaded his head was brought by the Emperor to Ainz as an apology for the incident. Ainz then turned Femel's corpse into a Death Knight right at the spot.

Trivia

 * Ironically his attempt to regain the Emperor's favor resulted into his own death by the Emperor's order.