Koutarou Miyao serves as a steadfast companion to the protagonist throughout their middle and high school years, bonding over shared enthusiasm for arcade gaming. While his approach to gaming remains casual compared to the protagonist’s near-obsessive intensity, his easygoing enthusiasm fosters camaraderie. Socially perceptive, he excels at deciphering unspoken dynamics within their peer group, often detecting burgeoning romantic tensions others overlook.

With tousled brown hair, bright green eyes, and an unassuming demeanor fitting a teenage student, he balances the protagonist’s single-minded pursuits with humor and playful banter. Though not pivotal to overarching storylines, his steady presence enriches the protagonist’s social world, embodying the contrast between leisurely enjoyment and the relentless drive of competitive gaming. His interactions, consistently portrayed across adaptations, reinforce his role as a supportive confidant who subtly anchors the group’s cohesion without seeking narrative prominence.