Sennosuke Shiratake is the Times and Places Analyst for the Kura organization's Wellside team, tasked with extrapolating and reporting on temporal and locational data within an id well—a digital representation of a killer's unconscious mind.

He is a towering figure with sharp grey eyes, often obscured by his glasses, and long black hair pulled into a ponytail. Two pronounced cowlicks frame his large forehead. He typically dresses in a black suit with a matching waistcoat, a light blue shirt, and a darker blue tie. For the funeral of Tsukimaru Nishimura and others, he wore a suit in a deeper shade, a white shirt, and a black tie.

He holds the conviction that a brilliant detective need not arrest the criminal personally, but only solve the case.