End of the World provides the only entertainment for Egu Island's inhabitants through her daily singing, mesmerizing the villagers. Her abrupt, unexplained disappearance fractures the island's tranquility, igniting pervasive anger, distrust, and anxiety. This event directly sparks the conflict dubbed the "Licking Great War" or "Pero-Pero War," revolving around her fate and the fabled Egumi Legacy artifact. Resolving this war depends entirely on locating both her and the Egumi Legacy.

Her vanishing acts as the catalyst for the entire narrative, with the islanders' ensuing actions and the war itself arising solely from her absence. The character functions as the central figure propelling the plot forward, with the island's upheaval and all character motivations intrinsically tied to her disappearance.