Mu-on'na

The, or Unmother, was a yōkai that was born through the grief of mother's suffering the loss of children to famine and war. The Unmother would steal a person's soul by absorbing their body into herself.

History
This yōkai posed itself as Inuyasha's mother, Izayoi, as a ploy by Sesshōmaru to locate the Tessaiga. She pretended that she was on the verge of death so Inuyasha would rescue her. She then transported Inuyasha and Kagome to an illusionary world. The yōkai tried to absorb Inuyasha into her body but was first prevented by Jaken until the location of Inuyasha's and Sesshōmaru's father's tomb could be found. After Jaken was knocked aside, she once again tried to absorb Inuyasha despite Kagome's attempts to stop her, and almost succeeded with only his left arm remaining. Shortly after Kagome freed Inuyasha from the Unmother's body, Sesshōmaru started attacking Inuyasha. Due to her endless love and kindness towards children, she rushed to the side of Inuyasha to protect him from Sesshōmaru's attack, which lead to her death.

Personality
The Unmother sought to fill the void within herself by taking the souls of others. Myōga stated that while she was a demon, she still possessed the heart of a loving mother.

Physical description
It is unknown whether all Unmothers look the same or similar but the Unmother that Jaken used wore a pink robe with blue lining and was faceless except when she used her spells to take on the form of a person's mother. Their skin resembles something of a soft gelatin that allows a body to be sucked into her but also protects the Unmother from certain attacks, such as when Jaken smashed her with the Nintōjō while the Unmother was attempting to absorb Inuyasha.

Powers & Abilities

 * Shapeshifting: The Nothing Woman's primary ability was to transform into the mother of its victim's mother. An example is Izayoi. The Nothing Woman took the form of Inuyasha's mother to make him reveal the location of Tessaiga. Though she had her body right, she didn't have her face so she needed to use illusions to look real. The Unmother was a master of illusions so long as there is water for her spell to work.
 * Absorption: It was able to steal the souls of its victims by absorbing them through its chest. It was unknown what happens to the soul and body of someone that is absorbed by the Unmother. It is also unknown what happens to the souls the Mu-onna absorbs after it was killed.
 * Blessing: It was able to create flowers that are placed in limbo, which could provide protection and is capable of creating illusions, and teleporting victims to limbo.
 * Telepathy: It could read minds, thoughts and memories of a person by touch, but generally didn't do so since its primary concern is absorbing its victim's soul.
 * Regeneration: It could easily heal its body of less severe injuries, such as when she dislocated her neck.

Manga vs. Anime

 * In the manga, Inuyasha finds out he is being tricked before the Mu-onna starts to absorb him, and in the anime he finds out while being absorbed.
 * In both versions, she is killed while protecting Inuyasha from Sesshōmaru's attack. In the anime, she is struck by Sesshōmaru's light whip attack (which was a technique exclusive to the anime). In the manga, she is killed by Sesshōmaru's punch that is intended for Inuyasha.

Trivia

 * Like all female characters in the manga, the Nothing Woman's nipples are visible.
 * When Kagome splashed the reflections with Jaken's staff to save Inuyasha, the yōkai yelled in pain. This shows that they are bound to her.
 * Her seiyū, who is the same as Izayoi's, also voiced Kasumi Tendo from Rumiko Takahashi's previous series .

Media appearances
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Manga

 * Chapter 12
 * Chapter 13
 * Chapter 14
 * Chapter 15

Anime
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 * Episode 5
 * Episode 6
 * Episode 133

Mujer del Limbo 无女