Guizhong

Guizhong is the deceased god of dust who is estimated to have died around 3,700 years ago in the war before the Traveler arrived. She is depicted as Zhongli's former lover but maybe a close friend. If anything Zhongli deeply cared for her and when she was alive, her well-being. The Genshin Impact fandom describes her cause of death and I quote "Black dust choked the heavens and a thousand rocks splintered."