There were demons - lots of them, including the Demon Lord - in his Casino. In any situation this was a recipe for disaster. If it wasn't for the demon lord he would have simply booted the demons out while telling them to stop stealing his despair. 

But the truth of the matter was the Demon Lord was here, in his casino, within his very own [i]Starlight Millennium[/i]. She would have to be dealt with - swiftly, coolly, without incident. 

"Stay close by me." Alastor said softly to Chu, patting her back to try and calm her down as he walked down the central stairwell. Dismissing the nearby security guards with a wave of his free hand, he led Chu and himself into the room where it seemed a gathering of his compatriots had begun. 

"Your highness," he said smoothly as he entered the room, most likely interrupting whatever it was she was saying, "Had I known you were coming I would have prepared a reception and suitable refreshments." 

His strong front was not only for himself and the desire - the need - for him to remain in control of the situation but also to ensure that Chu would not grow even more afraid. Worst comes to worst, the danger of exposing their existence would prevent the Demon Lord from resorting to outright violence...

Or so Alastor hoped.