Yuki Mitani

A player at the Go Club at Haze Middle School who overcomes his cheating habit. He is angry at Hikaru for choosing to be an Insei rather than stay at the school Go club when they have a tournament around the corner.It is shown that he and Hikaru still talk to each other but it is not known whether the are still friends.Yuki remains in the Go club, but only after much convincing. His birthday is October 15th.

(Source: Wikipedia)