Cain C. Hargreaves

Cain is a young English nobleman who is also known as the Earl/Count of Poison for his fondness in collecting and storing different kinds of poisons which he calls his "children". Cain's childhood was filled with both physical and mental abuse inflicted by his father, Alexis. He was whipped on the back daily because Alexis claimed that Cain is a cursed child and this is the only way he could be forgiven by God. Cain's mother, Lenora, tried to kill him because he was the illegitimate child of her husband Alexis and Alexis's sister, Augusta. Cain became Count at the age of twelve after killing his father (Cain is named after the biblical figure, Cain, for the fact that he was the first human to kill a relative, though, in this case, a brother named Abel). He has green-gold eyes (they're actually green but the gold in them comes because he is a child born of the incestuous relationship). To outsiders he seems like a wealthy incorrigible playboy. The only people he trusts are his head butler Riff and Mary Weather, who people consider to be his half-sister through Alexis's relationship with a maid. The manga based his physical appearance on British actor Rupert Graves. Cain is considered so beautiful that he can pass for a woman.

(Source: Wikipedia)