Image: Mask of Zhao Yun
Masks have appeared in all kinds of speculative literature with an array of functions. They have been used in celebrations, religious rituals, to hide identity, as a form of art and dance, in political circles, and to provide protection for the face. Your character has a sudden need to use a mask. Why? What problem does it solve? Write your idea in 200 words.
Image Credit: Wikimedia Commons, Mask of Zhao Yun, Public Domain