[ And just like that: ] —Headaches. I have chronic headaches. [ K answers without hesitation now but seems mildly confused even as he does. Perturbed, even, by what just occurred. Only his recognised handler or superior officers should be able to trigger this compulsion to obey. ] When Zephyr brought me here, I was still healing from a fractured skull. But the headaches started even before that, so I didn't think they were related.

Then our memories were manifesting in the rain, and I saw my handler again... a memory of her. But real enough that I had to obey her. [ A glance toward Royce here, because aside from Connor, he knows the most about K's history and the awkward android problems. ] The headaches — stopped. For a while at least. [ So, too, is the throbbing pain in his temples rapidly dissolving right now, and he regards John with a curious frown. ]

I think you've just confirmed why.

[ Congratulations, John, you've solved the mystery without even meaning to. ]