Darker than Black Doujinshi Yin

A supporter in Hei's team. Yin is a spirit medium known as a "Doll". Very passive and speaking rarely, she is described as having no emotion and incapable of such processes (however as the series progresses she shows a slight human side with hints of emotion). Her primary function is to locate individuals, usually assassination targets, for the team as she has the ability to see anything near water when she is touching some. Yin possesses memory of Kirsi (last name unknown), who lived in Finland learning to play the piano under the tutelage of famed pianist Eelis Kostinen.



In the manga, she resembles Kanon since she is also a "doll" though she has some of Kirsi's memories, making the method for creation of dolls into a point of speculation.

Darker than Black doujinshi Hei

Darker than Black : Hei
Hei : The main protagonist and an elite Contractor with the Messier Code BK-201. Hei plays a gentle-hearted student from China named Lee Shenshun (Li Xiansheng (Han Yu Pinyin) or Li Sianshong (Tong Yu Pinyin), literally Mr. Li), but when "working" he takes on the role of a seemingly (at first) apathetic and guiltless killer known also as The Black Reaper. Part of an organization of unknown ambitions known only as the Syndicate, Hei is searching for the whereabouts of his sister Pai, whom he lost several years ago when the South American gate imploded.

Hei's contract allows him to generate electricity, and he is hotly pursued by the Japanese government for his involvement in multiple assassinations. He acts as the spy/assassin of his team. His huge appetite and seeming lack of a obeisance lend him more of a sense of mystery, even with his own team. In the anime, there are hints that despite Yin being a doll, he developed feelings for her, as he saved her life when he was told not to.