Kunio Hazama is a biologist and an associate professor at the Graduate School of Biosphere Science at National Seongbuk University. Throughout the events of the film, he serves as a key scientific advisor, providing critical insights into the nature of the massive creature threatening Japan.

Hazama is characterized by a deeply introspective and philosophical nature. He is consistently seen in a state of deep thought, and his contributions to the team often come in the form of eureka moments that are pivotal to the plot's development. His perspective is not limited to pure biology; he also approaches the creature from a philosophical angle, pondering its deeper meaning and existential threat. He is driven by a scientific need to understand the unknown, pushing past surface-level analysis to consider terrifying possibilities about Godzilla's potential for evolution and adaptation.

In the story, Hazama's role is to provide the biological expertise necessary to decipher Godzilla's anatomy and capabilities. He is the one who realizes that Godzilla functions as a living nuclear reactor, with its dorsal fins serving as a cooling system that releases blood. This discovery is fundamental to understanding the creature's energy source and biology. He also makes the horrifying deduction that Godzilla could evolve to a smaller size and even sprout wings capable of intercontinental flight, demonstrating his ability to extrapolate from current evidence to future, more dangerous scenarios. Furthermore, his memory is crucial when he recalls that a red origami crane is the key to unlocking the analytical table left behind by the late Professor Goro Maki.

Regarding key relationships, Hazama works closely with the rest of the crisis response team led by Rando Yaguchi. While his specific interpersonal dynamics are not the focus, his value to the group lies in his unique scientific expertise and his ability to see patterns and possibilities that others miss. He engages in the collective effort to analyze the data and form strategies against Godzilla.

Hazama shows significant development in his understanding of the creature. He moves from identifying basic biological functions to grappling with the profound and terrifying implications of Godzilla's existence. His final thoughts on the matter are notably philosophical. He rejects the idea that Godzilla's structure is merely a molecular array, instead comparing it to a mandala, a complex geometric symbol representing the universe that is used as a meditation tool in Buddhism. This suggests his development culminates in viewing Godzilla not just as a biological anomaly, but as a kind of cosmic diagram or avatar that reflects deeper truths about evolution, survival, and the universe itself.

Hazama's notable abilities lie entirely in his intellect. He possesses a sharp, analytical mind capable of making logical leaps based on sparse data. His primary strength is his scientific foresight, as he accurately theorizes about Godzilla's nuclear biology and fears its potential for rapid, world-spanning evolution and even immortality. His philosophical approach allows him to ponder the existential and symbolic significance of Godzilla, seeing it as a force that surpasses simple biological classification.