#My husband and I have been discussing this theroy

[baddieladdie]

Hazbin Hotel Theory:

Alastor's soul is owned by Lilith to look after Charlie

"I'm hungry to freedom like never before. The constraints of my deal surely have a back door. Once I figure out how to unclip my wings, guess who will be pulling all the strings" - Episode 8

"It has been an age since thou hath graced us with thy presence. Some hath spun wild tales of you falling into...holy arms?" - Zestial, Episode 3

Alastor hasn't been seen in hell for 7 years and Charlie mentions she hasn't spoken to her mother in 7 years either (beginning of episode 1).

"Adam is dead. Your deal is done and I'm in charge now. Your brat is threatening the very foundation of heaven. And if you want to stay here, you're going down there and stopping that bitch. You understand me, Lilith?" - Lute, Episode 8

Alastor immediately having beef with Lucifer stepping in to support Charlie. Lucifer's involvement would also reduce the amount of influence Alastor/Lilith could have on Charlie.

This jab in particular during 'Hell's Greatest Dad' stands out to me because Lilith & Lucifer are separated at this point. Maybe Alastor is dissing Lucifer for not being there for Charlie. All the while, Alastor was involved heavily in the Hotel project, even if that was just by Lilith's demands.

Alastor: Well, it looks as though I need a visit to the tailor. Best of luck chums!"

Vaggie: Wait, you're leaving?! Alastor, we need your help. We need you to do your job.

Angel: We need a wall.

Alastor: Of course. Can't let my new project fall into disrepair already! What would the papers say?

This last piece may be a stretch - Alastor is on his way to the tailor but still pauses to fix the hotel. How obligated is Alator to keep the hotel in top condition? (Episode 2)

"So then why do you want to help me if you don't believe in my cause?" - Charlie, Pilot

With that radio scratch, maybe Charlie struck a nerve by asking. Alastor was pretty clear that redemption wasn't possible - the nonexistent humanity. Is 'personal entertainment' a cover-up for being forced to help the hotel?

Given the hierarchy of Hell in the hellaverse, there aren't many who could put Alastor in a place of vulnerability or provide services that he cannot do for himself (strike a deal, then). Lilith would have the power to keep Alastor in bonds and may have a motive in keeping an anonymous eye on her daughter.