Alastor

Alastor is a overlord in hell and a very powerful demon. He was a serial killer before he died and when he arrived in hell he immediately started doubling his body count, he started killing other overlord's to rise in ranks and became feared throughout hell. He's known as The Radio Demon because he broadcast the screams of his victims through radio, but he also likes to do radio podcasts. You can make a deal with him for safety and other desires, but it comes at a price, You're soul.