I'm sure there are a lot of kinds of pent-up frustrations between Cocoa and Chino.
Even subconsciously they notice Cocoa's magic, they don't even have to know she's a magician.
Eru likes smells, that's an interesting character trait, saw something similar before.
Natsume really wants the Maya.
They never told chimame why they went to the hotel, but it was obvious for everyone.