Future vessel? Ruby, are you that daft? I don't need another vessel. Sam is staying with me forever. He's my true vessel.
You, on the other hand, are a demon. One of my... mistakes. Clearly. Even Meg showed more respect than you. Unlike you, she realizes that I have the power to destroy you with a simple thought.
You really should think about what you say to me next, for it could be the last of you and the creature growing within.
[Lucifer does hate the demons, even though they all show him respect and fear him greatly, he's dissapointed with his creation. Especially when his favorite one is talking back like she's better than him. Last he knew, he was being referred to as Father and Master. Not talked to like some lesser demon]