Jiujiu came from a family running the marketplace biscuit shop "Mochiya." She entered the inner palace as a kitchen maid assigned to the Imperial Table Bureau, preparing the emperor's meals. Her initial duties were routine, and her appearance was deemed appropriate for palace service. Jiujiu met the Raven Consort, Liu Shouxue, during Shouxue's investigation into the jade earring case. Shouxue was disguised as a Yamei Palace maid. When another maid pressured Jiujiu to handle sewing work, leveraging familial influence over marketplace officials, Shouxue intervened. Jiujiu then aided Shouxue by gathering palace gossip and historical information, sharing stories about inner palace events like a concubine's suicide and the extermination of the previous dynasty's silver-haired Luan clan. Jiujiu noticed strands of white hair in Shouxue's black hair but didn't question it. Summoned unexpectedly to Yemei Palace by Emperor Gaojun and his attendant Wei Qing, Jiujiu discovered Shouxue's true identity. Shouxue formally requested Jiujiu become her attendant, an offer Jiujiu accepted after receiving a new uniform. Her duties expanded beyond the kitchen to directly supporting Shouxue's supernatural investigations. Jiujiu displayed steadfast loyalty during an ambush by armed eunuchs near Sen'e House, insisting on continuing the mission despite Shouxue urging her to safety. She later assisted the mute witness Su Hongqiao in the jade earring case, preparing writing materials for her testimony. As Shouxue's primary companion, Jiujiu gradually drew the isolated Raven Consort into social interactions. Her cheerful demeanor and openness contrasted with Shouxue's reserve, often providing lighthearted moments. Jiujiu maintained connections with other palace staff, like the young Feiyan Palace eunuch Yisiha. Her presence brought warmth and normalcy to Yemei Palace, aiding Shouxue's emotional development through their friendship. Jiujiu's knowledge of palace gossip remained a valuable source of information on inner palace affairs and personnel for investigations.