Seiichu Tsukimitsu is the minor character of the Ryuuou no Oshigoto! series. He is the current chairman of the Japan Shogi Association, and a genius player who became the second middle school shogi pro in history. He is ranked 9-dan.
Seiichu is meeting Yaichi in person, Seiichi quickly told him about his request about Yaichi to take on another disciple who is a 9-year old, fourth grade elementary school girl at that. After teasing Yaichi a bit about his infatuation with elementary school kids, Seiichi explained that this girl only wants an A-rank pro player or a title holder as her master and he couldn’t take any more disciple. After some negotiation, Yaichi agreed to take the girl in as a temporary disciple only until she joins the training group.