桐山零, Rookie King
The protagonist of the series. 17 years old. A five dan Rei became a professional shgi player while in middle school. His parents and sister died in a traffic accident and after that he was taken care of by his father039s friend Kda and became his apprentice in shgi. After becoming a professional shgi player and after completing middle school he became independent of him and decided not to attend high school. After feeling a quotneedquot to attend school however Rei later joined a high school after a oneyear delay. He lives in the city of Rokugatsuch June town.