Mermother

is a Rank S Water-attribute Rare Classic Yo-kai of the Slippery tribe.

The Yo-kai Medallium bio reads; "A god-like Yo-kai that is the source of all life. As proof of that, she will tell of how she gave birth to the gods."

Yao Bikuni is one of the Yo-kai required to unlock Yamatan.

Appearance
A pale-skinned mermaid with big blue eyes. She has gray dot eyebrows and pointed ears, with a pale blue and gray gradient fin at the middle of her head, dark gray antlers, and her hands and arms wispy white fish fins. She has long dull gray-blue hair pulled into a twisty braided bun with a long amount let loose on the side of her head. Over her chest are two dull white seashells, while she wears a long pink ribbon. Her mermaid tail is deep blue with white tail fin and top, with three big gray orbs near the end.

YW 2
Izanami-Attacker

YW 2
Izanami's soul-Raises all stats to the yo-kai next to the yo-kai that has this.

Yo-kai Watch 2
Yao Bikuni can be freed from the Crank-a-kai in the past with a Light Blue Coin or Special Coin, or with a Doki Doki Coin from either Crank-a-kai.

She can also appear 40,000 meters into the EnEn Tunnel.

Origin
Izanami's name and profile refer to Izanami-no-Mikoto, the progenitor goddess of Shintoism. Together with her husband Izanagi-no-Mikoto, she descended to Japan and gave birth to thirty-six divine beings, but as she gave birth to the last one, the fire god Kaguzuchi, his raging flames burned her to death. Refusing to accept his consort's fate, Izanagi descended into the underworld realm of Yomi to take her back, but Izanami refused as eating the underworld's food had changed her and she could no longer be with him. As he couldn't see her well in the deep darkness, Izanagi set his comb alight to gaze upon his beloved's face, but there he discovered that she had turned into a maggot-ridden living corpse. Terrified, he ran back to the surface, with the enraged and mortified Izanami giving chase. Soon as he was out he sealed the entrance with a massive boulder, leaving the furious Izanami to bang her fists against the rock and curse him, swearing she would kill 1000 living creatures each day for the offense. Izanagi replied that he would then give birth to 1500 more.

That was how death entered the world, and though the two gods' relationship would later be mended by the mediation of the dragon goddess Kikuri-Hime (who would be known as the first miko in history), Izanami remained in Yomi as the goddess of the afterlife.

Name Origin
Her origin aside, the reason Izanami is a ningyo Yo-kai could be due to a wordplay on her name and the word.