Born in 1890 to a Japanese father and a Russian mother, Yuri's birthplace is unknown. In his youth, he moved throughout China, going wherever his father's military assignments took them. Both of his parents died when he was 10 years old. Yuri's fusion ability awakened at the moment of their death and he has been a harmonixer ever since. He is searching for the owner of a mysterious voice, which guides him during this story.