Chief AD Yokoyama heads the assistant director team at Tokyo Hajikko Television, supervising ADs like Mafuneko and Yori-chan. With three years at the station, he holds a leadership role coordinating and guiding newer ADs in their daily duties. His approach blends natural diligence with a consistently calm, collected manner when handling production hurdles and team duties. This professional exterior occasionally reveals a pronounced obsessive streak emerging under specific circumstances. He collaborates professionally with colleagues across various television production roles, including directors such as Onigawara and location managers, while maintaining his supervisory responsibilities.