Mona Megistus — Genshin Impact

Mona’s errand in Beyond This World’s Stars leads her to Klee, daughter of Alice, Barbeloth’s rival and friend. Klee has removed the original contents of the guarded box and put her own treasures inside. Mona unwittingly reads the old diary that was kept there before realizing it belongs to her master. Afraid of Barbeloth’s reaction to this breach of her warning, Mona stays in Mondstadt rather than returning immediately. With the Traveler’s help she secures inexpensive accommodation in a formerly sealed laboratory.

During the limited-time Unreconciled Stars story, Mona investigates a rash of mysterious meteorites with the Traveler and Fischl. She recognizes danger in Scaramouche and uses her powers to take the party to safety. Later investigations connect the meteorite-induced dreams to the ambitions of the ancient adventurer Leonard. Scaramouche’s disturbing claim about the sky being false challenges the apparent foundations of the astrology she has inherited.

Mona once met a traveling adventurer while gathering food. He shared his meal with her, but her reading indicated that he would die within two years if he continued adventuring. She urged him to give up the dangerous life; he understood the warning and refused. Years later, Mona had not learned his actual fate and believed the prediction had come to pass. In her Golden Apple Archipelago mirage, this memory brings into focus a painful limit of her profession: she can warn someone of a future, but she cannot compel them to change their choices.

In Summertime Odyssey, Mona and her companions enter a mirage shaped by her memories and fears. The illusions confront her with the hurt caused by predictions whose recipients rejected unwelcome truths, as well as her feeling of helplessness before fate. Her friends reassure her; Mona resolves to continue pursuing her craft without surrendering her ability to guide and encourage people in the present.

In Fontaine, Mona encounters the Traveler while attending to business connected with The Steambird, including an invitation to discuss the prophecy. She names her master as Astromancer Barbeloth Trismegistus and explains that “Megistus” is an honorific associated with their school rather than her inherited surname. She also reveals that she was born in Mondstadt, that her parents moved to Dornman Port, and that she traveled with her mentor before settling in Mondstadt City. Mona recognizes the extraordinary scale of the prophecy and distinguishes ordinary astrology from the insight needed to read the fate of an entire nation. She agrees to contact Barbeloth for assistance; Mona herself does not claim to have solved the crisis.

In Witch’s Homework: Of Untested Insight, Barbeloth’s letters lure Mona toward the underground gateway to Khaenri’ah in Sumeru with a tantalizing prospect: a way to observe the real stars beyond Teyvat’s false sky. Barbeloth describes the Sign of Truth, which she says may bypass the false sky using water. Mona performs the prescribed rite, but the sign opens only long enough for dangerous creatures to emerge; she does not glimpse the stars she hoped to study. After the enemies are defeated, another letter reveals the old master’s mischievous intentions, leaving Mona furious. The attempt does not establish that Mona has mastered the extraordinary divination Barbeloth described.

Completing the associated quest unlocks Mona’s Genesis of Starsigns gameplay talent. This combat enhancement is distinct from the story’s unsuccessful attempt to study the true sky.