Final stage boss, also a playable character in Touhou 7.5, 8, 10.5 and 12.3. Yuyuko is the princess of the netherworld pagoda, Hakugyokuro. She is a ghost, but unlike most of her kind, looks entirely human. Living in the netherworld, she doesn't socialize much with the rest of Gensokyo. Her only friend from outside is Yukari. Her family name Saigyouji suggests relations with the famed poet Saigyo. Yuyuko, at first appearance, is a ditz; her mental processes seem to be dedicated mainly to teasing her gardener and servant, Youmu, and anticipating her next meal. However, her usual manner conceals a sharp mind and an almost prenatural depth of insight.