Kasumi is the late mother of Yumi and Miwako and the daughter of Takae. She used to own the Ryokan Hiei. She drowned one night in the baths of the inn, and now her ghost supposedly haunts the Ryokan. Though the player never actually meets her during the duration of the game, she is often mentioned by other characters. Before her death, Kasumi created an elaborate puzzle hoping it would encourage her family to work together. Nancy finds letters written by Kasumi that contain clues towards solving this puzzle.