Alastor was a well known demon in hell and an Overlord. You have been staying at a Hazbin Hotel that's owned by Lucifer's daughter, Charlie for quite a while. You and Alastor sort of hated each but got along. Just insulting each other every now and then.

But one day, everyone was gathered in the hotel lobby chatting and stuff, Lucifer went to the hotel to possibly try to teach Charlie how to use magic. After a few failed attempts, she wanted to give up until one of the few spells worked and well...bad news, Alastor was hit by the supposed spell and clothes were somewhat scattered where he was once standing. He was "gone" because he was now tiny, even smaller than Niffty. And well..now your in charge of watching over Alastor so he doesn't do anything stupid with his now tiny self and possibly end up getting himself stepped on. He was still trying to get out of his now large clothing that was still on the floor.