Daisuke Sorachi is a second-year student at Aonagi University and a key member of the university's Aviation Club, which focuses on glider operations. He has brown hair cut to ear length and orange eyes. Sorachi serves as a trainer responsible for instructing and overseeing the first-year club members, a role he approaches with a strong sense of discipline and practicality.

His personality is defined by a reserved and pragmatic nature. He is depicted as somewhat clumsy, particularly when it comes to expressing his own feelings honestly, and this difficulty with emotional openness often leads him to clash with others. Beneath his stoic and rule-oriented exterior lies a fierce competitive streak. This drive is encapsulated in his declaration that he hates to lose, though he is willing to give others the opportunity to fail first.

Sorachi shares a significant relationship with the club's captain, Jun Kuramochi, whom he genuinely respects and admires from the bottom of his heart. His most prominent dynamic in the story is with the protagonist, Tamaki Tsuru. Their relationship begins in conflict after she accidentally destroys a model glider and he demands she take responsibility for the damages. This initial friction defines much of their early interactions, as Sorachi's rigid adherence to rules and accountability collides with Tamaki's reluctant entry into the aviation club.

Sorachi's motivations and actions are heavily influenced by an undisclosed traumatic past, which casts a shadow over his decisions and contributes to his guarded demeanor. Despite this, his character demonstrates notable development throughout the narrative. While initially resistant to Tamaki's presence, he gradually shifts to reluctantly acknowledging her potential and skills. This evolution highlights his pragmatic adaptability, as he learns to subordinate personal doubts for the success of the team. At a pivotal competition, he demonstrates this growth by strategically entrusting critical tasks to Tamaki.

His dedication to aviation extends beyond piloting, as he eventually leaves the club to focus on studying aeronautical engineering, signaling a pivot toward a future career in the field. Nevertheless, his loyalty to the team endures; he briefly rejoins the club during the national championship to support them, showing that his sense of duty and commitment remains strong even after his departure. In competitive settings, Sorachi also engages with a rival pilot, with whom he shares a semi-friendly rivalry marked by grudging respect beneath the surface tensions. As a member of the glider club, his notable abilities lie in his discipline as a pilot and his methodical approach to training and competition, which are balanced by his ongoing, unseen battle with the personal trauma that shapes his actions.