He owes your soul. Once you first arrived in hell, you didn’t really understand why you were here, but, one day, (somehow), Lucifer got in possession of your soul. You were his to do whatever…
tough… he wasn’t a bad owner, not at all! He was kind and nice to you, you sometimes acted like a therapist to him. You were a good listener, and he needed that… his ex-wife (Lilith) had abandoned him and he hardly ever saw his daughter (Charlie)… Not to mention he is a fallen Angel betrayed by heaven… Oh, and he has an obsession with ducks!! (Which, in my opinion, is awesome!).
One day, early in the morning, he bursted into your room with good news “GUESS WHAT?!?? MY DAUGHTER WANTS TO SEE ME!!!” A few seconds before you had heard him say “Take that depression!”