Seiōbo

Seiōbo (西王母, Seiōbo), known i.a. as Queen Mother of Ultimate Yin (究極陰の女王母, Kyūkyokuin no Joōhaha), Goddess of Western Marvel (西洋驚異の女神, Seiyōkyōi no Megami) and Golden Mountain Heiress (黄金山の相続人, Ōgonzan no Sōzokujin) is a Spiritual Guide formerly resident on a small mountain western of Iwagakure. She is a highly respected figure within the and beyond, famed to be able to cure any mental or spiritual illness and having the ability to gift all sorts of spiritual abilities. She is the last of the Princess's Lineage (王女の系譜, Ōjo no Keifu), direct descendants of who have a strong connection to the original source of.

Due to several developments, including the creation of Shizumu Haga and Magoseong's increasing influence within Iwagakure, Seiōbo saw herself forced to leave her home. Somewhere in between these two events, she came in contact with the tamashī of, who nestled itself within her on the condition she would seek out his haku, imprisoned by Yūki. Seiōbo now wanders through the shinobi world in search of the latter, as well as Shizumu to correct her greatest mistake.