Alastor with a savior complex (but it's not really a savior complex he just loves protecting you)
Alastor, who when he first sees you arrive in Hell thinks you're so cute and precious. What are you doing in a place like this, sweet one?
He puts his silver tongue to use and convinces you to stay with him... for your own safety. He won't let anyone or anything hurt you
Alastor, who when he finds out about all your trauma and all your pain, is frustrated and angry at the world. You don't deserve that. You don't deserve to feel pain ever again- so he'll take it all away.
He'll "deal" with anyone who hurts you, cannibalize anyone who discriminates against you, he'll even disembowel anyone who minorly inconveniences you.
Alastor, who once he's dealt with all your problems, worries you won't need him anymore. So he fabricates some. His shadows make mischief that he corrects all so he can be your savior. So that you'll always be at his side - because he is safe and reliable for you and only you.