A smile is approval, and that's the only thing that matters to Sebastian. He says, "This way, Captain," with a half-bow before heading off to one of the domes. He doesn't link his arms in hers, in part because he isn't inclined, in part, perhaps, because some trace of decorum tells him that he can't initiate it with someone whose ranking is higher than his, though that option is less likely.

He walks like he's about to show off a construction-paper castle, with a bounce in his step and a grin in his eyes.