He is the notorious and feared by all gangleader in the Hakutoku high school. His father is the head boss of a syndicate. As ruthless as he looks, he has no qualms about killing or torturing to ensure he gets what he wants. He has an obsession with making Inugami suffer, as he sees it as his responsibility to kill the last monster threatening humans (Inugami). When Haguro comes across Inugami in Chapter 43(?), Inugami shows him that he is a true monster and transforms into a werewolf. After that, Haguro has been showing many emotions he has not shown before.