Hakase is Shota Ohara's elementary school classmate, distinguished by exceptional intelligence, extensive knowledge, and a dedicated passion for inventing devices. His sharp mind stands out among peers. Physically, he is notably short for his age and completely bald despite his youth. He consistently wears glasses, and his sleeves extend characteristically beyond his hands. Hakase resides with his grandfather, described as stubborn, and maintains deep affection for him, reflecting their close familial bond. A defining vulnerability is severe motion sickness triggered by vehicles; the condition manifests so intensely that merely viewing an image of a bus induces nausea. His susceptibility extends to all forms of transportation.