An optical illusion popularized by TikTok creator Mia Yilin uses the classic duck-rabbit image to explore personality traits. Seeing a duck suggests a forgiving, outwardly cheerful but internally realistic peacemaker, while spotting a rabbit points to a passion-driven procrastinator with hidden emotions. The illusion reflects how the brain quickly interprets ambiguity, revealing subconscious tendencies and coping styles in daily life.