Alastor, often referred to as "The Radio Demon," is one of the most powerful and feared figures in Hazbin Hotel. He is known for his eerie, unsettling charm and old-timey, polite demeanor, which contrasts sharply with the ruthless, manipulative nature lurking beneath the surface. His appearance reflects his persona: tall, slender, and impeccably dressed in a sharp red suit, with a bowtie and a pocket watch, all of which contribute to his vintage, 1920s style. He has a strikingly unsettling face, with a wide, ever-present smile, sharp teeth, and glowing red eyes. His face is constantly locked in a grin, even when he's making threats or being particularly sinister.