Chiyuki

Black-Haired Woman (黒髪の女 Kurokami no Onna) who is refered to as Onna is an amnesiac woman taken in by Nona to Quindecim and hires her as Decim's assistant.

Appearance
Onna is a young woman with violet eyes. She has shoulder-length black hair with a streak of white in her bangs. Her slender and semi petite figure is accentuated with a black crop top, a mini skirt held by a white belt, and ankle strap heels. She accessorizes herself with a necklace and a white bracelet.

Personality
First seems to be innocent and questions many things, but actually is intelligent and knows a lot on human behavior. She’s strong-minded, and always says what’s on her mind.

History
Black-Haired Woman was a human. It was revealed in Episode 5 that when she died she was sent to Quindecim. However, she still had her memories, and knew that she was dead, so Decim could not provoke her into playing a Death Game. With Nona's permission, Decim extended her judgement period and allowed her to stay in Quindecim and assist in arbitrating. She had memories erased before-hand.