Kuchisake

Kuchisake (口裂け女, Kuchisake) is a young woman, a twisted, soulless, and broken individual who no longer sees the world in all shades of colors - only permitting her eyes to see either the black or the white. A resident of, having been born in the outskirts of a nearby village, Kuchisake is the product of a whore and one of the hundreds of men she slept with - though Kuchisake is led to believe that it was a shinobi from the Hidden Leaf who took his rights of her mother during a mission. Born in the lowest of the lows, Kuchisake was met with serious illness at a young age, and developed breathing problems, which was somewhat corrected with the usage of a breathing mask that ties into her own chakra reserves to keep a steady flow moving.

Dubbed the Black Cat of Amegakure (黒猫の雨隠れ, Kuroneko no Amegakure) for her sly maneuvering and cunning, as well as her thieving profession, which has led to Kuchisake having quite the reputation (forcing her to live underground for the majority of her life).