Saku is a character in mentioned in episode 11, but who dies before its events. She is the wife of Mujika . She lived in the village of the mountain master and is always waiting for Mujika to return, since she's in love with him. However, because he's a Mushi Master, Mujika must always keep traveling. She overheard Mujika say that if he could kill the master and consume it's flesh, he could stay on the mountain and keep mushi away with his mind. The next day Mujika discovered his poison and map to the master's pathway went missing. Saku had stolen them and killed the mountain master, feeding its flesh to Mujika without his knowledge. Years later she dies, Mujika mentioning that "the energy was simply too much for her", the energy being the life force of the mountain.