Chrome Dokuro is a character from the series Katekyō Hitman Reborn, created by Akira Amano. She was possessed by Mukuro Rokudo's spirit. Although, unless she is in danger, Mukuro does not control her, but rather, she has control of her own actions. She was involved in an accident that caused her to lose her right eye and most of her body parts. Mukuro saved her by providing the necessary body parts through the use of his illusions. Chrome has only been seen using illusions so the readers don't know if she can use Mukuro's other five powers. Mukuro can take over Chrome's body if she is in danger, a mist will surround Chrome and Mukuro's appearance and power will take over. Her first appearance in the manga, was in the chapter 113, during the Varia arc. She is the guardian of the ring of the Mist and is part of the Vongola Family(Information taken from Wikipedia and some manga volumes)