Disclaimer: FMA belongs to Arakawa Hiromu
Notes: I'm always wary about how I portray Riza. I definitely don't think she's emotionless, but I think she has a fairly tight control over her emotions. Not completely (probably not as much as I've implied here), but I think she'd be wary of letting her innermost thoughts reach the surface.
Sixty-five: The You Reflected In The Glass
There were some things that Riza didn't let anyone see. Private things, like expressions and emotions she held back from her face because they revealed too much. She didn't keep her face as an entirely expressionless mask, but she did stop her thoughts from reaching her surface when others were around, in order to maintain a position of some ambiguity. So it was a surprise when she was reminded that there was one person she could never hide everything from.
"I saw that, Lieutenant."
She smoothed the amused smile off her face, hiding her shock. "Sir?" It hadn't really been that funny – just a reminder that things could go wrong, even for Roy Mustang. He needed that lesson to be repeated on occasion, so that his ego didn't inflate any more than it already had.
He turned from the window he had been standing at, an eyebrow raised in her direction. "I can see your reflection, you realise?"
Instead of tensing up and apologising, she gave in to the urge and laughed.