Neruo Higurashi works as a patrol officer at the Kouen-mae Police Box, defined by a unique condition: he sleeps continuously for four-year periods, awakening only for one day during each Summer Olympics. On that single day, he employs a supreme psychological ability to psychically locate wanted criminals worldwide by viewing their profiles, achieving record-high arrest numbers that validate his employment despite extended dormancy. Physically average in height, his facial features perpetually convey sleepiness through half-closed or fully closed eyes. His hair appears scruffy and untidy, depicted as black in the manga and dark brown in anime adaptations. While asleep, he exclusively wears light yellow long-sleeved pinstripe pajamas, switching to his standard police uniform—blue coat, white undershirt, black tie, blue pants, and black shoes—solely on his active day. Forcible awakening outside the Olympic timeframe provokes intense anger and destructive city-wide outbursts. Calming him typically requires intervention by a pleading beautiful girl. Beyond police duties, he pursues interests in volleyball and chemistry; the latter involves collecting plants, medicinal drugs, and prehistoric organisms for experimental enlargement in his room. His family includes a younger brother, Okio Higurashi—whose name translates to "awake man"—and whose behavior starkly contrasts Neruo’s. Okio works relentlessly for four years without sleep as a "Hyper Business Soldier," circling the globe. Among colleagues, Kankichi Ryotsu frequently shoulders the frustrating task of rousing Higurashi when necessary. A notable trivia detail lists his birthday as February 29th.