Nazumi appears as a secondary figure within protagonist Yomogi Asanaka’s high school social circle, characterized by his glasses and consistent presence with a black backpack. His brief but distinct moments occur in key episodes: in Episode 1, his backpack sits adjacent to Ranka’s red one during a school scene, subtly contrasting their belongings. Later, in Episode 12, he demonstrates quiet reassurance by resting a hand on Ranka’s shoulder amid a kaiju attack, reinforcing his role as a grounding presence among peers. Details about his background, personal history, or relationships remain undefined beyond these situational interactions. His involvement does not extend into expanded storylines or supplementary franchise media, maintaining a strictly peripheral narrative footprint across all documented sources.