"That's what the eyepatch is about. Because if you aren't expecting something, you probably react with those cells, and it'd be obvious what was happening." It's a gentler way of saying she doesn't think his control at will is full truth, and that she won't call him out further on the subject.

There were enough changes wrought on his body with the introduction of foreign cells. He's more created, less born, but in his way, Ken is a human-skewed hybrid; socialized in one group independent of any real knowledge of the other.

"Have you been eating enough?"