Natsuhi

is the wife of Hotarubi and the mother of Sumaru.

Background
They both had completed the star training. They stole the star after seeing the side effects of the training. They were caught by the Third Hoshikage and banished from the village, though the Hoshikage promised to stop the star training.

Hoshigakure Arc
She stole the star again, and Akahoshi took her son as bait. She retried the star, then tried to steal it once again later after Akahoshi forced her to give up the star. She fell for a trap laid by Akahoshi and was hit by kunai thrown at her by Akahoshi and his henchmen, while trying to destroy the star using some form of sealing jutsu. She tried using her chakra, but it was too much on her body and she collapsed. She painted a symbol on the floor with some blood that had come out of her mouth then died. One of Sumaru's tears hit this symbol when he found her and this later formed her ghost.

After destroying the bulding she and Sumaru supposedly died in, Akahoshi implanted the star in his chest. Naruto Uzumaki fought Akahoshi and destroyed the star in the battle. As she died, Natsuhi performed a technique that allowed her chakra to take the form of her ghost, singing the song that Sumaru and her had been singing throughout the arc. The chakra supported Naruto Uzumaki, allowing him to fly briefly during the battle. Her final word was "Sumaru".