Alastor

Alastor, also known as the Radio Demon, is a fictional character from the adult animated series Hazbin Hotel. He is a powerful Overlord in Hell, known for his charismatic yet sinister nature and his past as a radio host and serial killer in New Orleans. Alastor offers his assistance to Charlie Morningstar, the Princess of Hell, in her endeavor to rehabilitate sinners, but his true motives remain shrouded in mystery. (I got this from Google) >:)