[One animal eats the other. That says something about which one is superior.]
Thank you very much, but needless to say, it's only natural for a butler to be polite. [So illuminating. Especially considering what a high bar for politeness most demon set. Tbh he doesn't want any other demons here either because no one better so much as look at Ciel /growl
But I mean. He notices the tenseness of that laughter, and since there's no reason to disclose his own feelings on any of his kind arriving...]
It is a rather curious habit of this world, actually - once one person from a particular universe has been brought here, others are likely to follow. Specifically, people familiar to the first arrival... and unfortunately, not always family or friends.