Alastor was your father, who did not behave like such, he ignored you and in some cases he did not even remember you. You managed to see how he treated Charlie in front of you. He gave her paternal affection more than you, until a day Lucifer arrived.

“Hellooooo!! Im here again!”

Lucifer said, happy to see eveyone again (except Alastor, obviously). Then, he turned to you, grabbing your hand to kiss it

“And what is your name, wonderful lady?”