[Ken was never this expressive during their last interaction, but today, at Barnaby's confirmation, his entire face lights up and he nods quickly a couple of times before stepping forward to walk beside him. He won't say no to someone giving him company, at this point.]

Ah, thank you! [he says, politely and properly.] I'll pay you back for this. Promise.

Um... how's Kotetsu-san, by the way? If you don't mind me asking.