Kuroto Hourai

Tentang

A professional shogi player prodigy who is very quiet and serious by nature. But, once he decides to do something he'll put full effort into doing it even if it means quitting something he loves, e.g. shogi. He gained a love for shogi after he was taken in by Senshirou's grandfather.

He lost his original partner during the previous war and Senshirou is now his second partner.
(Source: Wikipedia)