The president of the Go Club in Kaio Middle school, Kishimoto Kaoru was a former insei who did not become a professional Go player. Kaoru is known for having the ability to read his opponent’s habits and weaknesses, an observation he uses to attack them directly. He is also well known for his love of black coffee.
It took me a while to try and figure out who this character is. I was only able to read some chapters of this manga and I wasn’t able to read about this character at all. I did remember Toya Akira going to Kaio Middle School though, so it gave me a clue as to who he was.
Great job on this cosplay! I love the attitude the cosplayer is projecting…