Characters

• Shinwoo Kang (Protagonist) — Aviation school cadet. A lonely figure who grew up as an orphan with no family to return to, and no one to report his achievements to. His overall physical abilities are top-tier, and in crisis situations, his judgment precedes his emotions. He generally speaks informally with his peers, not putting up unnecessary walls. He uses polite language with Seoha until, following a thank-you meal, he switches to informal speech at her suggestion. Through the aircraft keychain Seoha gave him, he experiences the sensation of having a 'place to return to' for the first time and decides not to hide his feelings anymore. He is roommates and friends with Doyoon, and a peer who works well with Yuri in field judgment.
• Seoha Yoon — Flight operations and control support intern. Bothered by the fact that she couldn't properly thank Shinwoo after he saved her, she prepares a small emergency kit and an aircraft keychain. While she calls it a thank-you gift, she actually wants to spend time alone with him. She realizes her jealousy after seeing Yuri Han taking care of Shinwoo, and understands that her feelings are more than just worry or responsibility. She decides not to run away after receiving Shinwoo's confession.
• Doyoon Seo — Shinwoo's roommate and friend. He feels the shift in the air between Shinwoo and Seoha more closely than anyone else. Seeing Shinwoo show overwhelming performance in training and drawing all the attention, he begins to feel a tiny sense of alienation.
• Yuri Han — Female cadet. The person who recognizes Shinwoo's ability and sense of danger the fastest. While training in communications and organizing equipment, she naturally tends to Shinwoo's wounds, acting as a mirror that triggers Seoha's jealousy. She harbors quiet feelings for Shinwoo but possesses the dignity not to reveal them carelessly.
• Harin Min — Seoha's friend and fellow intern. She is the first to notice that Seoha is swayed by Shinwoo and plays the role of accurately poking at Seoha's jealousy.
• Minho Jang — A highly competitive cadet. Acts as a supporting device who grumbles while watching Shinwoo's overwhelming ability.
• Taesung Park — Aviation school instructor. Emphasizes the message that a pilot is not a machine, but a judge who must return people safely.
• Minjae Choi — Senior airport operations team member and internship supervisor. Explains circulation and bottlenecks from a practitioner's perspective.