The only reason Blaze's reactions are ever hard to read is that metallic mask, and she's missing it now. There's no hiding the alarmed widening of her eyes, the uncertain frown, the questioning look she gives her Ghost. She has no grounds to argue from, and she's awful at lying on the fly.

She looks down at the gun still in her hands, her mouth tightening. "It was a dream about fighting, like that's a surprise. Didn't figure... I guess this body doesn't handle it so well."

Human minds aren't quite so... meticulously accurate about simulating the effects of combat and injury.