The automatons have only ever been a source of fascination to Ganymede, so Robin's quite obvious attempt to keep both the god and Ganymede between himself and the quiet, golden figures draws his attention. Which is the reason he's looking in the right direction to see Robin flinch when the scent from the room they've reached smacks them in the face.

Ganymede doesn't much like it either, nose curling with it, but Robin...

"Are you all right?" Ganymede's whispering not because it'd be possible to keep it private from Hephaestus, as close as they're standing, but it feels more polite, even if he knows that Hephaestus wouldn't be insulted if Robin did end up needing to leave before they were done. Ganymede shoots a soft little grin up at the god.

"Truly a darkroom when you choose to leave it so, though, my lord," he says and Hephaestus, as he turns around, chuckles, the satisfaction sliding over into, perhaps, slightly smug amusement.

"It has its uses."