Seioubo (西王母, Queen Mother of the West; Dowager of the West) is a shinsen who lives on Mount Ka in the Five Mountains. Outside of the Twelve Kingdoms, she is described as a legendary senjo who lived in the western part of the Mt. Konron. In Seioubo's garden, every 3,000 years a single peach grows. It is said that the person who eats that peach is granted eternal life.
The Dowager lives in a special temple near Mount Hou and oversees the livelihood of the Koukai and Mount Hou. She also sends her nyosen when it is time to collect women who have earned the right to be nyosen. Seioubou is also prayed to for compassion and wisdom.