Hayato is an easy-going student and one of Nagara's few close friends among the group transported to another dimension. Tasked by Hoshi, he maintains a detailed catalogue documenting every student's supernatural abilities. His own power, dubbed "ET," allows him to emit a small light from his index finger. Though its practical utility seems limited compared to others, he confidently ranked it "A" in his personal assessment. He actively participates in group survival efforts, such as constructing beach huts. Hayato displays a tendency toward hasty assumptions, notably concluding Mizuho caused objects to combust in blue flames and persuading others to adopt this view despite Nagara's and Rajdhani's objections.