Well, one of two looks, really. One was the smile and nod, where they weren't entirely sure what she was talking about but didn't want to contradict her. The other was kind of a frown that they were trying and failing to hide, like they were sure something was wrong, clearly Solas was using some kind of weird magic on her, surely this couldn't be genuine.
So Peri opted not to waste her time, breath and energy, and instead just politely excused herself. Made her way through the castle, ducking irate nobles and inbound scouts, and eventually into the rotunda. She sat against a wall or on the scaffolding, or stole Solas' chair to watch him paint. He would just smile at her, and it was like calm flowed through the room and into her, making her eyes drift shut and a contented smile rest on her face as she just let herself be at peace, just for a moment.
