Koji Nagasaki is a supporting character in the anime Devilman Crybaby. He serves as Miki Makimura's manager and photographer, having come from a troubled background and aspiring to become a respected reporter. Nagasaki's personality is driven by ambition and a desire to rise above his past, which motivates his work in media. His role in the story is primarily as a professional associate of Miki, connecting her to the entertainment and journalism spheres. He maintains a working relationship with Miki and interacts with other characters through that context. Over the course of the series, his development is limited, as he remains a peripheral figure whose presence highlights the contrast between ordinary human aspirations and the catastrophic events unfolding around them. Nagasaki does not possess any supernatural abilities, keeping him grounded as a normal human within the narrative. His background and dream provide a glimpse into the everyday lives of people caught in the chaos, underscoring the series' themes of ambition, humanity, and the fragility of personal goals in the face of larger forces.