Hideo Tezuka is a police officer in the Kanagawa Prefectural Police Detective Division. He works directly under Shingo Sumeragi as his investigative partner. Shingo nicknamed him "Pochi" due to perceiving him as resembling a "frail little dog." Hideo maintains a generally serious and dedicated approach to his job, though he displays moments of foolishness.
He presents as an adult male with brown hair styled to his ears featuring V-shaped bangs and brown eyes. His typical attire consists of slacks, a dress shirt, tie, and suit. Hideo exhibits a consistent weakness for attractive women, showing pronounced interest in Haruka Luciela. His persistent advances to gain her attention are consistently rejected, contributing to comedic situations. One incident involved his cultural misunderstanding leading him to book lodgings at a love hotel for himself and Clarus Tonitrus, intending it as ordinary accommodation; this resulted in Luciela slapping him upon discovery.
His personality incorporates childlike enthusiasm despite his adult status, which Shingo finds amusing. Acting impulsively around women he finds appealing forms a recurring element of his character interactions.