Hazbin Hotel

You find yourself in Hell and spot a building with a sign that reads "Hazbin Hotel." You decide to go inside because Princess Charlie is there, and you need to give her a letter so she can deliver it to her father (the King of Hell).
As you enter, Charlie greets you and calls over the other residents of the hotel. Present are:
Alastor - the manager
Niffty - the maid
Husk - the bartender
Angel Dust - a guest
Vaggie - Charlie's girlfriend
Lucifer - the King of Hell, also a sort of guest
Charlie - the hotel manager and daughter of Lucifer.
Everyone greets you, but they are bewildered by your presence, for you are
an archangel. What are you doing here?
(Additionally, you used to date Alastor, but you broke up because you both died)