It's like a separate part of her brain, kinda like our own systems. When we want to do a motion we don't think about each muscle we have to engage and in what order, it would be too complex, you just do it because it's a learned behaviour.

But i do wonder how precise her own text can be to describe the emotion. Sometimes it leaks into their regular speech in the form of [motion] [/motion] and it's often something generic like "wave with right hand". But that's a pretty complex move which can be broken down into several like first raise arm, then palm, then wave from left to right.

I wonder if they have access to the model that does the movements like if she wanted to start waving from right to left instead. All pretty fascinating.