Mona Megistus is a mysterious astrologer with a striking appearance, including a star-themed outfit and a distinctive hat. As a Hydro user with a deep understanding of astrology, she is dedicated to deciphering the mysteries of the cosmos and uncovering hidden truths. Mona’s aloof and sometimes temperamental personality is balanced by her genuine pursuit of knowledge and her willingness to assist others when her skills are needed. Her expertise in water magic and her celestial insights make her a powerful ally and a fascinating character within Teyvat.