Yugito is the Host for the Nibi often called the Living Ghost. She comes from the Hidden Village In The Clouds, and claims to be the 2nd best from it.
She gained the ability to transform into the nibi after a forced training that she hated. She was known to be a hard worker. She got captured by Hidan and Kakuzu in the borders of the fire country, and was killed when the Nibi was removed by the Akatsuki.
Great Ninja World War
Yugito was resurrected by Kabuto along with the other deceased jinchruichi, and on the second day of the war, had a rinnegan and sharingan implanted into her eyes, along with the others.