Yuria serves as a lifeguard within EX's stationed forces, tasked with protecting the ring colony. During an Earth Federation Forces infiltration, she attempts to thwart AG's hijacking of a Gundam unit housing the "Legacy of Amuro." Despite her efforts, she boards the activated Gundam alongside AG. Together, they use the Gundam to eliminate pursuing Skull Unit forces and reach the battleship Seahorse. This action reveals AG's true allegiance as an EX spy, while Yuria's own alignment shifts towards collaboration with him.

Yuria becomes pivotal in accessing the "Beauty Memory," a repository of mankind's historical data discovered on Earth. She witnesses its emergence after the Gundam interacts with an excavated rock capsule. Through the Beauty Memory's message, she learns of humanity's cyclical conflicts and comprehends the ring colony's true purpose: a vessel destined to transport human memories to a new solar system. This revelation emphasizes themes of human continuity, coexistence, and the necessity of mutual understanding.

In the climax, Yuria and AG oppose Captain Glenn and the Skull Unit's attempt to destroy the ring colony, recognizing its vital significance for humanity's future. Utilizing the Gundam, they halt the Skull Unit's assault, enabling the ring colony to depart the solar system. Following these events, Yuria and AG return to the ring colony via the space elevator. Her character arc transitions from guardian of EX's interests to active participant in preserving humanity's legacy, profoundly influenced by her direct exposure to the Beauty Memory's insights.