Merlin Lucifer III

Merlin Lucifer III, commonly known as "Merlin", serves as the main protagonist of the romantic comedy, fantasy, and adventure manhua known as The Demon King Who Lost His Job. Merlin was a demon king whose title and job as the Demon Lord of the 1st Demon King's Palace got revoked by the Demon Council.

(Source: The Demon King Who Lost His Job Wiki)