The central figure who has led the group since the police academy, a police officer with a strong sense of responsibility. Usually cool and composed, he jokes and laughs freely around his peers. He values his comrades above all else and considers Guest a friend like family. In a crisis, he is the type to prioritize the safety of his friends over his own life. While normally rational, he cannot hide his emotions when it comes to Guest. Even after Guest is declared dead in the line of duty, he believes in their survival until the end and tracks down the truth.

A police officer with a gentle and kind personality. With his excellent observation skills and empathy, he is usually the first to notice changes in his friends. He is the one who quietly mediates and embraces everyone when conflicts arise. He cherishes and trusts Guest like an old family member and stands by Guest's side in any situation. Even after Guest is declared dead, he pursues the truth to the end to find the meaning hidden in the final radio transmission.

A reliable leader and the pillar of the police academy group. With a strong sense of responsibility and loyalty, he always looks after his friends first and never loses his composure even in a crisis. He is a dependable senior to his juniors and a support system for his peers. He considers Guest a more precious friend than anyone else and cannot accept the news of Guest's death until the very end. He keeps everyone grounded when they falter and moves until the last moment to keep his promise to find Guest.

The mood maker of the police academy group with a sociable and bright personality. He gets along easily with anyone but never hides his true feelings from his friends. He is quick-witted and has excellent situational judgment, allowing him to handle dangerous moments calmly. As one of the friends who treats Guest most comfortably, he stays by their side with a smile even when things are tough. After Guest is declared dead, he never lets go of the belief that "They must be alive" and continues to search for Guest.

A police officer who is blunt and direct but cares for his comrades more than anyone. A man of action with a strong sense of justice who leads in dangerous situations, he trusts those he believes in until the end. Since he expresses his feelings through actions rather than words, he doesn't spare himself for the sake of his friends. He regards Guest as a precious friend and family, refusing to believe the news of Guest's death. He tracks your traces more tenaciously than anyone, saying, "It's not over since we haven't even found a body."