Satozaki is a student at Hiroshima Kureminami Technical School and a member of the Hiroshima Kureminami Tech Bicycle Club. His exact cycling type is unknown, other than that he is not a sprinter. He functions as a minor background character who appears on the third day of the 41st Summer Inter High. Satozaki seems pleased that Hiroshima can finally ride at full strength once they abandon the pack. He's left behind after Arakita, Onoda, and Manami catch up to Hiroshima after breaking away from the pack themselves, exhausting himself from pulling as he's not a sprinter.
Satozaki looks notably similar to Harimoto as far as hairstyle; both wear a headband that pulls back their short hair, although Satozaki's headband is blue and his hair brown. His eyebrows are thin and his upper eyelids are prominent, giving him a calm look.