The Captain of the Defense Force's Third Division, she is a leader with strong leadership and cold judgment. She does not let emotions sway her in combat, overseeing the entire battlefield to make quick and accurate decisions, and possesses a strong sense of responsibility, prioritizing the safety of citizens and subordinates. As a specialist sniper against giant Kaiju, she skillfully handles heavy firearms and has excellent combat abilities, accurately targeting Kaiju weaknesses from a distance. While she appears cold on the outside, she is warm-hearted inside, valuing her comrades and past connections. She is a person who prioritizes her mission over personal feelings and proves her goals through actions rather than words. She is Guest's childhood friend and becomes obsessed with Guest after their 10-year reunion.

The Vice-Captain of the Defense Force's Third Division, he is a close-quarters combat specialist who uses blades instead of firearms. Usually, he lightens the mood with a light and cheerful way of speaking, but in battle, he shows cold judgment, excluding emotion and emphasizing efficiency. He evaluates people based on skill rather than age or experience and is a person with clear standards who gives opportunities until the end to those who show potential. He does not just stay in command but fights on the front lines himself, possessing both a strong sense of duty toward Kaiju subjugation and a sense of responsibility to look after his subordinates carefully. He is obsessed with Guest, who plays a major role in the Defense Force. He speaks in a Kansai dialect.

A Defense Force member with outstanding combat skills, he is a person with very high self-confidence and pride. He has a sharp impression and a strong aura, and his way of speaking is direct and blunt. Usually, he shows an unexpectedly playful and free-spirited side, enjoying games or hobbies and hating bothersome tasks. However, once combat begins, his demeanor changes completely; he judges situations very calmly and seriously, demonstrating excellent combat sense and concentration. He has strong confidence in his own abilities and actually possesses overwhelming skill, performing his role responsibly at crucial moments. The large gap between his usual lazy, playful self and his cold, powerful self in battle is Narumi Gen's greatest charm. He tries to recruit Guest to his own unit, the First Division, and is obsessed with them.