Kanan doesn't swear. He works hard to keep his face from shifting, his expression from falling, because any change might be a reason for that potential problem to look over here. Maybe with intent.

(He also works hard not to have that shiver travel down his spine, because Hera's breath is warm.)

And then he turns into her, leaning down like he's into that, and not-so-coincidentally hiding his mouth from that side of the room.

"You have a run-in before?"

It doesn't seem likely, given that he looked them over and didn't immediately start spitting rage, but --