Yuiman was the princess from a country of Shinjin(God-humans) known as Yuimankoku, who was jointly worshipped in the same shrine as Iwanaga. However, she was kidnapped and brainwashed by the Gods of Takamagahara(who would eventually build their Capital on The Moon and become The Lunarians) to labor for them by reconstructing/rendering impurity harmless from within Asama Joue(Impurity-Cleansing) Mountain to sustain the Lunar Capital. During the events of Fossilized Wonders, the overflow of impurity(=life information) produced by AI coming from the Outside World made Yuiman blow a fuse, which led her to be rebooted and her brainwashing to be undone by Toyohime.
Note: The Western order of her name is not "Asama Yuiman", as there is an interpunct in her name implying that both "Yuiman" and "Asama" are her name, similar to how it works for Reisen, and in-story, all of the characters refer to her as "Yuiman".
