She tried to make a neutral face, but wasn't sure she'd succeeded.
Then she looked to her daughter, who was with effort keeping her face neutral and determined.
In the other, she went from a neutral face to a distressed one, to crying.
He kept his face neutral, and very straight.
I pulled myself back to the present and willed my face neutral.
The neutral face of the mask stared blankly back at me.
She looked away, keeping face and voice carefully neutral.
She assumed a carefully neutral face, having also picked up on a darkening in my tone of voice.
"Some of them, at least," said Mboya, his face neutral.
Alaire fought to maintain a neutral face, but inside, he was frantic.