He is a character created by Yoshiaki Kawajiri. He is a protagonist of the show. He is a wandering vagabond ninja who wants nothing to do but rest until one day, he got himself involved in a battle between the Hiruko and the Kimon Clan. Later, one of the Hiruko Clan members gave him a Dragon Stone in which he must give it to the light maiden, Shigure. Now he is on an adventure to give the Dragon Stone to Shigure and to protect her from both the Hiruko and the Kimon Clan.

His codename is Hei, which means black in Chinese. Hei is a very talented contractor, his Messier Code is BK-201. Hei lives two lives in the series. In public he is Li Shengshun, a foreign exchange student from China. He is very nice and well mannered. He lives in the Umitsuki apartments and is always working a new part-time job.He has a huge appetite, not unlike most anime characters.

Hei's other life is of a Contractor called BK-201 and also the Black Reaper, mostly by other Contractors. Before becoming a contractor Hei was an assassin which earned him his nickname. Hei is usually seen on the job in a mask and a dark bullet proof coat.

Hei has the ability to manipulate electricity and can also disturb matter on a quantum level.

Hei