[As it happens, Yuuki isn't the only one on that rooftop. She's joined, of course, by her partner in crime -- who is, in this particular instance, quickly pulling her back before she manages to drop more snow down.]
No, wait, not that one! That's the lord of Otherworld, trust me, you don't wanna drop anything on him. ... Probably. [This is why he's here, Yuuki, he can be your walking dictionary and face-recognition and spare you from making any huge mistakes. Not that he knows Emrys at all, though, so who knows he might have a great sense of humor...]