That way-too-easy acceptance is unnerving in a way Five can't quite articulate. Something about how incongruent it is to his own defiance of people ever making decisions for him, maybe. Just sits very wrong underneath his skin.

"Found anything of interest in looking around town yet?" It's easier for him to switch into something of a work mode than making casual conversation, and Five is pretty sure that's probably more comfortable for Vesper, too.