Okuyasu Yokomizo, a 7-dan professional shogi player in his thirties with a slender frame and glasses, balances competitive intensity with approachable warmth. His sociable nature draws him into regular exchanges with peers Tatsuyuki Misumi and Issa Matsumoto, while his gradual connection to Rei Kiriyama reveals a mentorship streak—cheering Rei’s successes and tactfully guiding him through shogi event politics. A natural educator, he simplifies strategy for novices and captivates crowds as a dynamic commentator, amplifying matchday energy.

A pivotal loss to rival Namekawa in the B-Class 1 league finals demotes him to B-Class 2, seeding enduring animosity. Yet he channels setbacks into resilience, guided by his mentor’s adage: "Even if a woman betrays you, a gain in material will not"—a creed anchoring his pragmatic focus. Secretly drawn to Akari Kawamoto, whose family profoundly influences Rei, Yokomizo navigates unspoken affections alongside career pressures. Though his early life remains private, his interactions exemplify a dual role: fostering camaraderie among players while upholding the shogi world’s disciplined ethos, blending personal empathy with unwavering professional resolve.