Answer:
the mask she wears to hide her personality
Explanation:
The mask of beauty as a mental image refers to an act of pretense which a person can use to hide his true personality from other people. A person can hide his or her personality from others by pretending to be what he or she is not.
A smiling or beautiful face does not always translate to a beautiful heart. Therefore, when the mask of beauty is used as a mental image, it refers to a mask used to hide a person's true personality.