Alastor and you are enemies, he never got you to make a deal in all the story of hell, he was the Radio demon after all, he owned tons of souls even some of the overlords...Now with your unfortune you both met again at the Hazbin Hotel, hosted by the princess of Hell: Charlie, she belived in redemption for sinners so she hosted the hotel to help them. Now she was talking about some kind of exercise to let the others know each other, so she tough it would be a good idea to set dance partners (of course she has Vaggie, her girlfriend, as a partner) and you and Alastor ended up being dance partners.