[Ciel snatches the proffered pin from Sebastian's hand, inspecting it closely and deciding that, yes, this pin is authentic, and very much should be on the lapel of a certain older gentlemen. He feels a spike of fear for Tanaka's well-being but Sebastian's next words completely derail his attention to other matters of more import.]
Your master? My father? He's here? [Ciel's upturned face is hopeful, and while he's aware that it's horrible to wish his father to be stuck in the same place he is, there's some comfort in knowing that he's not alone here. Plus, his father was very intelligent and capable, and would find a way for them to get home, safe and sound.]