The Witch of the Mountain, identified as a yamanba or yamauba, dwells in isolation within her secluded mountain cabin. She is encountered by Taro during his quest to find his mother. Initially appearing helpful, she provides Taro with crucial directions for his search. However, their interaction takes a darker turn when she inadvertently reveals her antagonistic nature. The witch discloses her responsibility for creating or controlling the giant serpent inhabiting the lake near the old woman's rice farm where Taro previously labored, exposing her connection to his earlier obstacles. Taro narrowly escapes her clutches following this revelation. Her actions directly contribute to the peril he faces next, as he is overpowered by yukionna shortly after fleeing her domain. Her portrayal reflects archetypal mountain witches of Japanese folklore, characterized by isolation, ambiguous motives, and a capacity for both guidance and malice.