Shimazaki is a 32-year-old employee at the company GOES, which has associations with Kou Ichinomiya. Standing 169 cm tall and weighing 50 kg, she is a cool and beautiful woman with a Cancer zodiac sign and blood type A. On behalf of Kou Ichinomiya’s father, she conducts investigations into Nino’s background, an assignment that draws her into the central mysteries surrounding Nino’s origins. Her inquiries lead to a confrontation with a stranger linked to the Village Chief, who threatens her to abandon the investigation.