Hollow inside
Lucifer stared down at the crimson blood dripping slowly down his wrist in a trance like state. He didn't even notice the door to his room open or his big brother Michael bursting in rambling about politics. Lucifer didn't even notice when his brother let out a sharp gasp and left his sentence dangling in the air as he caught sight of the angelic blade in his little brothers hands and the blood running down his wrists.
Lucifer did however notice when Michael healed him with his grace and pulled him into a crushing hug. Lucifer noticed because the pain had vanished leaving him feeling empty and numb inside once more. You see he would do anything to feel, anything at all. But he was hollow inside.