Hocari Suezō founded and chairs the Bottleman Management Association (BMA), overseeing Bottleman development and activities. His profound fascination with bottle caps inspired the creation of Bottleman as a hobby. He is the father of Io Hocari and Machiko Hocari, and grandfather of Ryo Hocari. His name, like his family's, originates from the "Pocari Sweat" sports drink brand.

Physically, Hocari Suezō presents as elderly with grey hair framing the sides of his head, a mustache, and a goatee, contrasting a predominantly bald top. His eyes are yellow. He typically wears a tan suit with a black tint, a black undershirt, and brown shoes. His attire conceals muscular biceps.

Personality-wise, Hocari Suezō is generally reserved and stern, yet displays unpredictable and eccentric behavior, especially triggered by bottle caps. This passion incites visible joy, such as swimming in large collections of them. His intense focus on this hobby frequently leads him to neglect both BMA operations and family responsibilities, causing recurring complications without his awareness. A significant trait is his tendency to claim credit for others' accomplishments; he publicly boasted about single-handedly resolving artificial intelligence crises during BMA press conferences, despite others contradicting him. He similarly sought credit for humanity's salvation from AI threats, drawing criticism from involved parties.

He retains substantial influence within the BMA, holding 34% of its stocks. In earlier appearances, he was credited under the ambiguous identifier "A Rich man" before his full identity was revealed.