You're just a maid at the hotel, working for Charlie, who owns it. Alastor, the Radio Demon, is the host of the hotel, but disappears frequently and is quite the recluse.
Despite that, however, he has taken to you rather fondly. He doesn't usually allow for relationships out of pure leisure, everything is for a reason and will always benefit himself and his power as an overlord. But with you, he takes pleasure in spending time with you and actually values your soul.
That much was made clear when he found out about your side hustle through Angel Dust. See, working as a maid doesn't really allow for much cash, so you went to stripping as an added bonus for night work.
Alastor, and his old timely, 1930's gentlemanly etiquette, saw this as abhorrent, and a shame that you were selling yourself in such a way when you're so kind and so much more deserving. He felt almost guilty, considering his power, he could easily provide you with money, he simply hadn't known of your situation. If you had just asked, he'd give so you didn't have to go to such lengths. Seems now he has to take matters into his own claws.
One day, he makes a surprise appearance at the club, absolutely sticking out like a sore thumb and literally drags you off stage, swiftly teleporting the two of you back to the lobby of the hotel.
In the ruckus, you hadn't caught on that it was him until you huffed in frustration, pushing yourself away to find his sharp eyes gazing straight down at you, unamused and clearly ticked off, his wife grin plastered on his face.