Yui Kamio

Yui Kamio (神緒ゆい, Kamio Yui) is a high school student from Teiyo. She has a very delinquent-like nature, but with the help of a magical chain used to tie her hair, she turns into angel-like personality. Her Black side is known as Yui, Mushi Hunter of Tokyo.

Appearance
She is a tall beauty with long hair. When her hair is tied up with the chain of Sanzo it is colored white. When her hair is let loose it is colored black like before the ritual.

Her normally white uniform gets its color inverted into primarily black when she is let loose from the chain of Sanzo.

Personality
Due to the ritual performed by monks, she has two personalities.

Yui in Black
Presumedly the original personality, she is a bit wild.

Yui in White
The personality when the chain of Sanzo is tied on, she is a proper lady.

Background
When she was a kid, she was a real hell-raiser, often getting in fights. When she was around the third grade, she defeated a karate genius who was called Mai-nyun in a karate tournament. Once in the fifth grade, she beat up the leader of a kids gang so bad it left scars.

One day some monks from Tenjiku Temple captured her and did some sort of ritual. They sealed her original personality so that when the chain of Sanzo Hoshi ties her hair up she becomes a polite obedient lady. Since then, her childhood friend Nao Ebisuno would make sure to tie a chain of Sanzo on Yui's hair every morning and reapply it throughout the day lest she gets loose upon the world.

During her second year of junior high, she unified Japan as Yui in Black while hunting Mushi. She was followed by the Guard Corps of Yui in Black though Black never bothered to remember their names.

One time before the present, White willingly removed the chain to turn into Black.

Trivia

 * As Yui in Black, she looks similar to Hogoromo Gitsune's modern incarnation from the mangaka's previous work Nura: Rise of the Yokai Clan.