Natsuki Sugano, a male detective with black hair swept to his right and chestnut-brown eyes, carries a fair build and dresses sharply in a black work suit layered over a green shirt, paired with a black tie and brown lace-up shoes. Known for his bright, cheerful demeanor, he specializes in defusing tensions and mediating conflicts within his division. This optimism, while his greatest asset, occasionally borders on excess, drawing mixed reactions from colleagues.

Born July 2 under the Cancer sign, he stands at 176 cm. His surname, blending “sedge” (菅) and “field” (野), and given name, meaning “summer” (夏) and “tree” (樹), reflect a connection to nature. Professionally, he champions community-focused policing, prioritizing direct citizen protection through roles like police box duties.

His inability to feel pain fuels a self-sacrificial streak, often prompting reprimands from colleagues Tsukasa Asagiri and Sosei Arakida. Though he avoids confrontations with superiors—sometimes excusing himself to sidestep criticism—he privately harbors secret plans or ideas. Despite humorously downplaying his idealistic wish for world peace as naive, his resilience masks a deeper complexity: a pain-free existence that intertwines unwavering determination with quiet concerns from those who notice his silent risks.