Who is That?
Zenhoi Kage. Her name if translated is Omni Shadow. She was a the legendary figure who spread the teaching of Oneness With Nature (Sage mode). She is the younger Sister of the famous Hagoromo Otsutsuki (Sage of the Six Paths) and the only daughter of Kaguya Otsutsuki. While her true name is unknown, some stated it was Fugetsu.
According to the Legends, Zenhoi Kage was a priestess who appeared long ago in an age of endless war. She was the first to explain about Sage Modes, as she tried to use her power and wisdom to lead the world to peace instead of war.
During her travels along with her brother she engaged in battle with a powerful beast (Juubi). It was said the battle lasted eight days and eight nights at the end of the eight night the beast was defeated. Using her abilities she was able to crystallize the beast. Then let her brother become the host of it's power.
Kekkei Genkai : Kyoteigan
Sage Mode - (Dragon) Well we all know what that Sage mode is.
Hope you Guys enjoyed reading.