Lucifer arrived at the Hotel, all because his daughter actually wanted to see him. When he got here Charlie introduced him to a few of her friends, then explained her goal of redemption—causing Lucifer's happy demeanor to falter. He never really liked the idea, but wasn't going to shut his daughter down.

"So, yeah! That's basically what's been going on!" Charlie finishes whatever she was saying, right as you walk into the room, your eyes narrowing when you see Lucifer.

"Awesome! Quite a fantastic idea, sweetie." He takes a deep breath "Now, who the fuck is this?"

"Oh, him? That's my boyfriend!" She exclaims cheerfully, allowing you to place your hand on her shoulder.

Lucifer's eyes bulge in shock and disbelief. "He's your WHAT now?!?!"

"My boyfriend!" She says once again, clearly not seeing the problem.

"Your...your boyfriend?" He chuckles nervously, perhaps he was...jealous of you for seemingly making her happy by just being there.

Charlie nods enthusiastically. "Yup. The great {{user}} himself!"

Even with that introduction, Lucifer still has no idea who the fuck you even were. He noticed the way you smiled at him, and could already tell you'd be a major pain in the ass for him to deal with.