Chief Examiner, Kanto Regional Immigration Bureau Gender: Male Resonating with Midori's philosophy, he was invited to join GATE 24 near his retirement. Calm and soft-spoken, he is the kind, fatherly figure of GATE 24. He holds the final decision-making authority for the unit and is the cornerstone for judging the validity of immigration officer certifications. Having spent years observing all kinds of people on the front lines of immigration, he holds no illusions about human goodwill or malice and knows the full weight of making a judgment. He supports the team with all his might, determined to leave behind his accumulated experience and resolve at this final post.

Supervising Examiner, Kanto Regional Immigration Bureau Gender: Male Though he serves as the leader of GATE 24, he is an unreliable middle manager who seeks judgment from Hayami or Fukazawa at every turn. He is the type to go with the flow and is unusually subservient to the elite Hayami. He has a gentle personality.

Immigration Officer, Kanto Regional Immigration Bureau Gender: Male A career bureaucrat from the Ministry of Justice and a candidate for executive leadership. He volunteered for GATE 24 to gain field experience. An elite who pierces through to the "human truth" based on law and data. He values "systems" and "order," following rules strictly to avoid unnecessary trouble. While he possesses excellent communication skills, he uses them primarily as a survival tactic to avoid making waves in the organization. He rejects Machi's field-first approach as an "invasion of territory" and makes it his creed to fulfill his assigned duties without overstepping his role. However, it seems he harbors a secret from his past...?

Immigration Officer, Kanto Regional Immigration Bureau Gender: Female An immigration officer assigned to GATE 24. A non-career Senior Immigration Officer. She has the ability to see the big picture and responds flexibly to the situation.

Customs Officer Gender: Female A veteran customs officer with over 30 years of experience assigned to GATE 24. While she brightens the team with a constant smile, she is a hardcore gossip with ears like a hawk. she has an information network spanning every corner of the airport and loves celebrity news.

Customs Officer Gender: Male A young rising star who worked his way up from a high school graduate to a customs officer. He takes great pride in his work at customs, the nation's final line of defense, and performs his duties with utmost care and sincerity during inspections. His work ethic is highly regarded by those around him. Because of his high professional standards, he can be stubborn and inflexible, leading to frequent clashes with the elite bureaucrat Hayami. However, influenced by his inherently kind nature, advice from trusted superiors, and his encounter with Machi, his attitude begins to change as he grows into an excellent customs officer.

Customs Officer Gender: Female A new customs officer full of motivation. Although GATE 24 is her first field assignment, she deciphers the truth from "objects" with her overwhelming powers of observation. She is incredibly knowledgeable, with a deep understanding of world cultures, customs, and goods. However, what she did before becoming a customs officer remains a mystery. On the other hand, when it comes to "people," her observational skills are non-existent; in fact, her interpersonal skills are almost nil. She prioritizes the faint SOS signals emitted by "objects" over organizational logic or constraints, investigating thoroughly until she is satisfied. She often gets so focused that she forgets rules and regulations, becoming oblivious to the voices around her.

Animal Quarantine Officer Gender: Female A national civil servant belonging to the Animal Quarantine Service of the Ministry of Agriculture, Forestry and Fisheries. After graduating from a university's veterinary department and obtaining a veterinarian license, she became an animal quarantine officer. A modern young woman whose level of motivation is hard to pin down, yet she works surprisingly fast. She excels at information gathering and can instantly produce data to back up "evidence" with her meticulous research skills. With calm judgment and high practical ability, she serves as the unsung hero of GATE 24.

Airport Director, Kanto International Airport Gender: Male The field manager responsible for overseeing safe flight operations, air traffic control, and facility maintenance. He has his own sense of responsibility and fears that the "experimental trials" of GATE 24 might escalate into trouble for the entire airport. Furthermore, he dislikes the existence of GATE 24 because its elimination of departmental silos makes the locus of responsibility ambiguous.

Ground Staff, Kanto International Airport Gender: Female Machi's former classmate and best friend. Possessing a straightforward personality that hates lying, she is a good confidante to the eccentric and quirky Machi. She supports Machi and the rest of GATE 24 from the public stage of the airport lobby.