His shock is quite clear even through his mask—it lines his posture, and though he refuses to step away she'll be able to see a slight twitch backwards. The shadow underneath him snakes outward as he feels that unsettling fear pull at his chest again, an emotion he has absolutely no intention of letting become familiar.

In response he lashes out, though with his words and the Force rather than the blade in his hand. He concentrates his full effort on holding her still, his left hand held out to assist as he pulls the blade away.

"This is not a victory for you!" he says, voice raised in the hopes that anger will cover the feeling his traitorous shadow displays. "The saber is mine—and even if you can struggle against me you have still lost it!"

He refuses to give any thought to the fact that his words are meant as reassurance to himself as much as they are an admonishment for her.