Yuyuko Saigyouji is a ghostly character from the Touhou Project series, specifically introduced in 'Perfect Cherry Blossom.' She is the elegant and whimsical princess of the Netherworld, residing in Hakugyokurou. Known for her carefree and cheerful personality, Yuyuko commands the spirits and oversees the border between life and death. Despite her ethereal nature, she often displays a playful and somewhat mischievous demeanor. Her role in the series often involves overseeing the events surrounding the boundary of life, and she is a powerful opponent with abilities related to death and spirits.