Deucalion does indeed make note of her awkward movements. However, he chooses not to comment on it. Inhuman tendencies and physical attributes are something he has as well and it has been the subject of mockery many many times. He knows that people are self-aware of what makes them unique and pointing out the obvious would imply nothing but rudeness.

But that doesn't mean he isn't curious.

"How long have you been here?"