Kurozuka

Her story has changed over the years and through various adaptations. A popular version of the story goes like this:
Long ago, a wealthy noble couple had a daughter whom they loved very much. However, their daughter was sickly, and by the age of five she had still never spoken a single word. The worried couple consulted with priests and doctors, until finally one doctor told them that the only way to cure their daughter was to feed her a fresh liver from an unborn fetus. The couple summoned their daughter’s nanny and put the task of retrieving the liver to her. Expecting that it would take some time to find someone willing to give up their baby’s liver, the nanny prepared for a long journey. She gave the daughter a protection charm and promised not to return without the liver, then left.