New theory for you to think about: What if Roo is the one with Alastor's soul..? It all makes since since the eyes in Roo's hair matches the eyes that follows Alastor ev erywhere while Lilith doesn't. Both Lilith and Alastor did disappear for 7 years but, Lilith has been in hea ven while Alastor came back unnoticed, but what di d happen to Alastor for seven years? Was Roo the r eason for Alastor's Scars? What truly happened to Alastor during those seven years that he was missing?
So sorry, when I first looked at the thumbnail I thought Alastor killed him and Charlie was happy he was dead and hugging her mother. I was like, “Ey leave the short king alone, he’s trying his best to be a good dad”
Charlie set Alastor free from his contract with Lilith after Lucifer had passed out possibly passed away from his fight with Adam. As in this au Lucifer and Adam both were fatally injured. Does this explanation help?