 While he collects data pertaining to tennis, he also collects personal pieces of data, such as favorite things, personal habits, and where they have been.This, combined with his almost robotic analytical nature the fact that his eyes are rarely seen (appearing only once at the end of Chapter 211), creating no shortage of awkwardness in social situations outside the court.His style originates from his close friend, Renji of Rikkai, who played doubles with Inui before moving.