Daisuke Sorachi, a disciplined and pragmatic sophomore in the university aviation club, enforces structure as a trainer for first-year members, prioritizing order and accountability. His rigid adherence to rules collides with Tamaki Tsuru after her accidental damage to a glider, sparking tensions as he insists on responsibility. Reserved yet fiercely competitive, he declares, "I hate to lose, but I'll give you the chance to lose first," hinting at an unyielding drive beneath his stoic exterior.

Shaped by an undisclosed traumatic past that shadows his decisions, he gradually shifts from resisting Tamaki’s presence to reluctantly acknowledging her potential, showcasing pragmatic adaptability. At a pivotal competition, he strategically entrusts her with critical tasks, subordinating personal doubts to secure team victory.

Later, he departs the club to focus on aeronautical engineering studies, marking a pivot toward his future career, yet briefly rejoins during the national championship, revealing enduring loyalty to the team. Interactions with a hotshot rival pilot expose a semi-friendly rivalry, hinting at grudging respect beneath surface tensions.

His evolution balances rigid pragmatism with incremental flexibility, driven by duty and teamwork. Unresolved threads, like the origins of his trauma, linger without elaboration, anchoring his actions in a blend of unresolved history and disciplined growth within the club’s dynamics.