ナミ

The young girl who washed up on the shores near the location of the training camp. Main ******e of the story.

 Looks to be about 10 to 12 years old.

 Her name and age are all unknown.

 The first impression of her is that of a mermaid or a doll.

 She doesn't seem to know who she herself is either.

 The first ones she saw when she woke up were Shouko and Yasumi, so it seems she became attached to them, much like a chick imprinting.

 Her normal mode is to be spaced out.
Solelo website

Her real name is Tsunami Nekata, she is Yasumi's older twin-sister and barer of Yaobikuni's spirit.

Her father is Munetsugu Nekata./