Bel hasn't met many planetouched in general, which is what he's guessing Ashton is. Either way, he can see enough to see that 'cracks' are not just going to be in bone. "A benefit to being small and light, then."

Which... drow aren't small small the way gnomes and halflings are, but Bel is still used to having to incline his head up around humans, and not having the kind of visible muscle human men had. "Also not a bad thing to have when living on a sky island."