Empress Fujiya commands the Silver Court, the advanced lunar civilization, as its reigning sovereign. She balances imperial duties with raising her daughter, Princess Kaguya, under the constant threat of a rival branch family plotting to usurp the throne. This political instability shadows her rule.

Royal protocols enforce a formal distance between Fujiya and Kaguya, prioritizing ceremonial obligations over maternal closeness. Fujiya feels this constraint deeply, her desire for connection stifled by the demands of her station.

A critical wave of terrorist attacks, orchestrated by the rival family, coincides with Fujiya falling gravely ill. Recognizing the escalating danger to Kaguya's life from targeted assassinations, the ailing Empress confronts the conflict between her roles as ruler and mother.

Fujiya makes a pivotal decision: she exiles Kaguya to Earth, the "Tainted World." This act serves dual purposes—extracting Kaguya from immediate lunar peril and positioning her to eventually reclaim the throne. Fujiya sacrifices traditional succession expectations to ensure her daughter's survival.

This choice marks Fujiya's defining character shift, moving from detached Empress to protective parent. Her motivations center solely on securing Kaguya's future, revealing a profound, previously suppressed maternal devotion. This sacrifice sets Kaguya on her path to maturity and lays the groundwork for the princess's future confrontation with the usurpers.

Fujiya's legacy lives through Kaguya's evolving resolve and determination to honor her mother's sacrifice by reclaiming her birthright. The circumstances of Fujiya's illness and her ultimate fate following Kaguya's exile remain undisclosed.