Koko (known as Huang Xiang in the Chinese tale) was known as an exemplar of filial service. When Koko was a young boy, his mother passed away. Seeing his father's devastation at the loss of his wife, Koko did everything he could to raise his father's spirits. During the heat of the summer, Koko fanned his father's pillow to ensure a cool and comfortable sleep. As the winter grew cold, he warmed his father's blankets to ensure a cozy rest.