Soubi Agatsuma

Soubi is a twenty-year-old student, studying Japanese art. He is a former student of Shichisei Gakuen (correctly translated as "Seven Voices Academy"), a school for fighters, where Ritsu Minami was his teacher.

As ordered, Soubi contacted Ritsuka after Seimei's death. He introduced Ritsuka to the world of fighters and sacrifices and told Ritsuka he would be his Fighter Unit. He fought beside Seimei for some time, and many people believe that he is Beloved's Fighter Unit. The appearance of Nisei in the manga, however, proves this to be false later in the manga. Soubi now fights for Ritsuka as Loveless, which is considered taboo because there is not a fighter-sacrifice bond between them. There is also a severe loss of strength, and in Soubi's case, his markings bleed in battle. Soubi was revealed to not have a true name at all — in fact, Ritsu comments that he is a blank slate, and whatever marking he is given becomes his name. Since Seimei carved Beloved into his skin, it became his name. When given a command to break the windows, courtesy of Seimei, in volume 8, it is shown that he cannot disobey, no matter how strongly he is against it.

Soubi appears to know much more about Seimei and his cause of death than he will divulge. Despite Ritsuka's insistence that he tell him everything he knows, Soubi refuses. In volume 5 of the manga, he even says, "Seimei is my God." He openly declares that he lives his life by Seimei's orders, but still says he'll obey Ritsuka's every order, which is not necessarily true.

In flashbacks to Soubi's childhood, he is shown to bear a strong resemblance to current-day Ritsuka.