A fifth-grader nicknamed Sumi-chan. She is Ayumu's best friend and serves as the vice-chairman of the student council. Her family runs a sake brewery. She has a very anxious personality and is concerned about Shuji.

Although she did not take actions that led to the disappearance like the other missing children, when she visited Shuji to offer her get-well wishes, she became possessed by Sakae's doll and was taken to another world from the sake brewery.

(Source: Japanese = Wikipedia || Translation = MyDramaList)