(Demons will be demons. But Ciel isn't really looking for them in Heaven. That would be silly, right?)

He would not like you near me, but as long as I don't interfere with his day, surely he doesn't have to know?

(Ha ha as if loopholes like that ever work or last. He does notice she sounds a lot like a certain butler. It's almost too easy to fall back into old habits.)

Kyo since the vessels use kanji. It is also small enough to be hidden on your person when you are in Mister Spears's company.