[There it is. The hollow apologies, the sad eyes, all the things that fooled her the first and second and every other time. The reason for all the galaxy's suffering. Her sympathy.]

You regret??

[Rey meets his eyes without wavering, because he has given her one gift with that reply. Showing him her pain is the best way to hurt him. He's all but admitted that.]

You regret not coming with me, back on the Supremacy, when I asked you? Hunting the Resistance across the galaxy, killing without mercy? Making me shut you out to protect them? I don't feel the Force the way I could. Do you regret that too?? I can't... can't focus properly! [She takes a step towards him too, but hers comes with an unspoken (as of yet) threat.]

I've lost the one thing that made me special, and all you can say is you regret?!