She is a monk from the Mystic realm, where Sun Wukong, Nu Wa,
Taigong Wang, etc. Come from. She is Sun Wukong's master. They both
guarded Orochi when he was imprisoned, but when Da Ji saved Orochi,
he defeated San Zang and Sun Wukong.
Later, Sun Wukong is under Kiyomori Taira because he is in debt
to him, and San Zang makes it her duty to free him and return to
the mystic realm with her.