Summary SCREENRANT VIDEO OF THE DAY SCROLL TO CONTINUE WITH CONTENT Certain pieces of dialogue throughout the first season of Hazbin Hotel constitute clues to Alastor's ominous past. The Radio Demon is a constant menacing presence during Hazbin Hotel's season 1 storyline of Princess Charlie Morningstar initially trying to get her plan to rehabilitate Hell's residents at her hotel off the ground.
The remaining question is where exactly Alastor went. Supposedly, he could have just been discreetly hiding out in a specific corner of Hell. However, his comment in the first episode, as well as another bit of dialogue, suggests that Alastor left Hell altogether. 6 Zestial Mentions The Rumors About Alastor Season 1, Episode 3: "Scrambled Eggs" Close Zestial implies that Alastor has some involvement with Heaven and the angels, and this aligns with his connection to Lilith, who currently resides in Heaven.
5 Mimzy Confirms That Alastor Was Alive Season 1, Episode 5: "Dad Beat Dad" The fifth episode proves to be a very revealing one where Alastor is concerned. His character takes an interesting turn when he becomes determined to show up Lucifer for Charlie's affection. However, the arrival of Alastor's old friend Mizmy brings many revelations.
The story of Alastor's radio broadcast was originally related by Vaggie in the Hazbin Hotel Pilot, available to watch on YouTube.