Drawings of Covered Mouths - Hiding Their True Feelings

When someone covers their mouth, it can be difficult to determine what sort of emotion they might be feeling. These days, most folks are familiar with this on account of mask wearing, which serves as an important reminder of how important facial expressions can be.

It’s hard to tell just what Hololive VTuber Akai Haato wants in her depiction below, but what about the other characters?