(Kiyomi POV)
I stared straight at the woman in front of me who still wore that mask of a smile without flinching.
With my experience in theatre, I've learned how to change my facial and body expressions to express certain emotions and thoughts without voicing them out.
It may not be perfect, but I've also come to learn how to see the emotions of others and understand what the people around me might be thinking from their countenance, a skill that I had been making use of to observe the people around me for a while.
While it allowed me to tell what people might be thinking most of the time, it also allowed me to see when people are faking their emotions.
Iris had been someone completely unreadable to me since it looked like she was a complete blank slate all the time. The only thing that I could tell was that she at least loved Master as much as we do, since her smile would turn into a genuine one when she was looking at Him.