I shall Protect You

Xiao, an Adeptus who protected Liyue for many centuries, gets corrupted to the point of no return. Morax; the God of Contracts, seals Xiao in a barrier until he could find a way to bring him back. He was like this until one day a miracle happened. A girl comes across Xiao with a mission to save him. This said girl is the daughter of Guizhong. With her mother's spirit residing within her as her guide she'll protect Xiao at all costs.