Gorō Mikashima is an IT specialist at the Flowercrest Department Store's planetarium. His duties involve maintaining and diagnosing the facility's technical systems. When the robot attendant Yumemi Hoshino begins exhibiting unusual behavior, including unauthorized departures from the planetarium, Gorō is tasked with investigating the cause. He conducts diagnostic assessments of Yumemi's hardware and software systems but identifies no abnormalities or malfunctions. Despite the lack of technical issues, Gorō continues monitoring Yumemi's systems and pledges further investigation into her programming to understand her behavior. His technical expertise establishes him as a support figure among planetarium staff, addressing concerns regarding Yumemi's operational integrity.