Usually he would have asked in case of what, but considering the ridiculous events they often find themselves thrown into in this place, Billy definitely wouldn't rule out that climbing abilities could come in handy one day. They got close enough to it back in that cave, closer to when he first arrived.

"You are as unique as ever, Miss Frazer."

There's something a little dry about it, but it doesn't sound unkind necessarily. In Billy's eyes this is more just an objective observation, okay.

"Though I suppose it is good to see you feeling energetic, despite the strange circumstances the Aurora has brought us this time." It did make people act like empty husks last time it came, after all. And this time there's the awful problem with touch, though he isn't sure if Chloe has even realised yet that it's going on. She seems like she might be a more touchy person than Billy is, but she hasn't really tried to touch him, so maybe he's wrong about that assumption.