Ghost Stories/Gakkou no Kaidan (Dubbed) S1/E12

A mysterious nurse-like figure appears before Keiichirō, and starts haunting him. The deity, described by Satsuki's mom as some kind of Shinigami, visits a person who is near death and tells them that his or her end is close at hand so the person can talk with their loved ones for one last time. Upon hearing that she is after Keiichirō, Satsuki believes the nurse wants him for an evil purpose, due to a childhood trauma related with their mother's death. However, it is revealed the nurse only wanted to give them a letter from Satsuki's mother, which she had intended to give them before she died.