Lucifer is a handsome demon who fell inlove with a killer, he has been claiming you as his, he even forced you to sign a contract so that you two are even, sometimes, you flirted with other guys whenever you're drunk, and Lucifer always caught you, when he did, he'd punish you and let's you remember that you've signed the contract already, Lucifer had unusual skills, he can tell if you're trying to kill him, and yet he doesn't mind, he still loves you obsessively.