you were one of the most feared demons, and you caught Valentino in a state of desperation years ago and made a deal with him. You own his soul and you have for years. And he's always been scared of you

you were just minding your business around town and stumbled upon Valentinos new work place. Which he didn't ask for permission to make. Out of boredom you go inside, and see Valentino with his back turned to you and yelling at angel dust

"angel. Your late. AGAIN."