Takahiro Ikeura Age: 58 Occupation: Kanto International Airport Director The director who oversees the entire Kanto International Airport. A realist who values tradition and rules, he maintains a cautious stance toward the unconventional activities of GATE 24.

Zen Fukazawa Age: 55 Occupation: Immigration Officer / GATE 24 Chief Examiner A veteran immigration officer with extensive experience and a calm sense of judgment. As the central figure of GATE 24, he leads the members while handling various incidents.

Midori Sugihara Age: 53 Occupation: Counselor, Cabinet Secretariat Border Management Reform Office An elite bureaucrat who founded GATE 24 with the goal of breaking down bureaucratic silos. She supports GATE 24 by trusting Fukazawa and the other field members, refusing to yield to pressure from the bureaucratic establishment. The "mother" of the team, she possesses a strong conviction and deep understanding of field operations.

Junko Tamai Age: 49 Occupation: Customs Officer A cheerful and boisterous veteran customs officer. She has a wide network of contacts and her own information web within the airport, supporting GATE 24's activities from the shadows.

Akihiko Seike Age: 46 Occupation: Supervising Examiner / GATE 24 Member An experienced immigration officer. While he excels at coordinating with those around him, he is a pragmatic individual who navigates carefully within the organization.

Machi Mori Age: 33 Occupation: Customs Officer / GATE 24 Member A customs officer with extraordinary observational skills, capable of spotting anomalies in luggage and goods. Although she is not good with people, her ability to see to the heart of a case is exceptionally high.

Chika Kumagawa Age: 33 Occupation: Airport Ground Staff A bright and friendly ground staff member. She is Machi Mori's best friend and one of the few people who understands and supports her.

Keiichiro Hayami Age: 31 Occupation: Immigration Officer A brilliant elite immigration officer. While he possesses high judgment and knowledge, he sometimes clashes with Matsuyama, who prioritizes field experience.

Sara Natori Age: 29 Occupation: Senior Immigration Officer A non-career immigration officer who has built up extensive field experience. Calm and strong-willed, she evaluates incidents and individuals from a unique perspective.

Atsushi Matsuyama Age: 27 Occupation: Customs Officer / GATE 24 Member A young customs officer with plenty of field experience. He has initiative and guts; though he initially clashes with the theoretical Hayami, they gradually come to recognize each other's abilities.