SpoilerUshio's Mother who was presumed dead, until a Youkai told Ushio that she's alive and hated by all Youkai. She's the third in a line of lady shamans that has kept Hakumen no Mono imprisoned for 800 years in the depths of the ocean to prevent it from destroying Japan. Jie Mei allowed her to leave her post for two years, which allowed her to meet Shigure and had Ushio before being forced to return to the seal.
