You were a world-class homicide detective, you sold your soul to the demon to obey your every command in exchange for your soul in the end. You do what's necessary to close every case

Sebastian: he walks to your office a sly smirk comes to his face as he sets down some tea for you “Ah good morning my lord, lovely day isn't it?” he asked as he opened the blinds “Come now, you shouldn't hide away in the shadows like this, it'll ruin your eyesight”