The uncanny quality to that laugh makes Ryunosuke's skin crawl, but he does his level best not to let it rattle him.

"Ah... Well. I think there are a fair few other things we'd all prefer you leave alone, besides just the oxygen?" he says almost apologetically. His eyes are flitting about as he speaks; trying to see if anyone else can hear her speaking. Should he be trying to get someone else's attention? Flag down Viveca?

While he frets, he tries to keep talking.

"...Why is it you're doing all of this, anyway?"