Luo Shen 洛神, the "Goddess of the River Luo" was a deity in ancient China. She was also called Consort Mi 宓妃, as Cao Zhi's 曹植 (192-232 CE) rhapsody Luoshenfu 洛神賦 states. Li Shan 李善 (630-689) comments that she was the daughter of the mythical emperor Mi Xi 宓羲 (i.e. Fu Xi 伏羲). She drowned when crossing the river and was then transformed into a river deity.
The name Consort Mi is already mentioned in the elegy Li Sao 離騷 by Qu Yuan 屈原 (c. 343-c. 278 BCE). In the elegy Tianwen 天問, she is also called Luo Pin 雒嬪 "Lady of the River Luo" and is said to have been the wife of the Earl of the Yellow River 河伯. In Cao Zhi's rhapsody she is described as being of an utmost beauty and tenderness. There is also a Peking opera with the title of Luoshen 洛神.
Most famous is Gu Kaizhi's 顧愷之 (346-407) handscroll painting of the Goddess of River Luo.
Detail from Gu Kaizhi's handscroll painting of the Goddess of River Luo. Source: British Museum. Click to enlarge.