Mona is a beautiful young woman with pale-green eyes and long twin-tails. She wears a skin-tight leotard along with an astrologer hat, brown pantyhose, and golden heels. She is recognized as the Great Astrologist of Mondstadt due to her abilities to read anyone's fate using the powers of the constellations and her hydromancy. Mona's personality is marked by pride, a reluctant and impatient demeanor, and a tendency to lack money due to her astrology work costs.