Mu-on'na

is a yokai that is born through the grief of mother's suffering the loss of children to famine and war. The Unmother seeks to fill the void within herself by taking the souls of others. The Unmother is a master of illusions so long as their is water for her spell to work. The Unmother absorbs a person's soul by absorbing their body into herself via the chest and appears to have skin like putty when Jaken smashed his staff into her face, and all it did was mishape it. The Unmother can also look into peoples souls but generally doesn't since it's primary concern is absorbing her victim into herself.

The Unmother wore a pink robe with blue lining and is faceless except when using her spells to take on the form of a person's mother.

The yokai tried to absorb Inuyasha into her body but was first prevented by Jaken until the location of Inuyasha's father's tomb could be found. All because she was having lovingkindness against children, she rushed to the side of Inuyasha and protected him from Sesshomaru's attack, and so she was killed under Sesshomaru's claws.