Demon Slayer, Do You Understand That My Sister Is an Angel?

(Demon Slayer fan + Miao Jiang Gu Shi + protagonist twins, with cp + he) ooc warning!!! When Miaojiang Gushu meets Demon Slayer, reason and emotion are forced to make a choice. The mother and son who fled here from distant Mingzhou thought they could live a stable life until they met the evil ghost—— Six-year-old Xiao An witnessed his mother eating his sister, and then opened his eyes four hundred years later, living in confusion as a wandering spirit during the Taisho period. The elder sister Nianci lost her memory and emotions after turning into a ghost. The pseudonym Ayouyi parasitized in her younger brother's hair, and the two consciousnesses were separated in her mind. Protect Shi An... Don't eat people... Kill him! Kill him and we will be free! When he encountered the unbeatable Shang Xian San Yi Wo Zuo, he watched in despair as the blood ghost technique that could kill him with one strike was coming towards him. He held down Yi Wo Zuo's fist with one hand, and his eyes were full of murderous intent. "Are you looking for death?" My brother can only die in my hands, do you understand?