The Serpent Pillar Tsuguko [ Naruto X Demon Slayer Crossover]

Kiyomi Uchiha is the younger sister of Sasuke Uchiha. After encountering Orochimaru in the forest of death and being given the curse mark she feels the life slipping out of her. She suddenly finds herself in the Demon Slayer world, where she is found and trained by Obanai and is sent to Final Selection to become a true member of the Demon Slayer team. However, in the world of Demon Slayer, she begins having strange memories as if had lived another life but not from the world of Naruto.