Rei Izumi, 26, sports shoulder-length chestnut hair and piercing violet-purple eyes. A former pharmacist, her rare DNA—rendering her immune to pharmaceuticals—caught law enforcement’s attention, leading to her recruitment. This genetic anomaly also makes her coveted by criminal organizations eager to exploit her unique biology for illicit drug testing.

Initially assigned to probation after a mishandled facility inspection, she joins STAND, a specialized anti-narcotics unit under Japan’s Ministry of Health, Labour and Welfare. Tasked with assembling a tactical team, she strategically recruits members from factions like Matori, Revel, the Kujou Family, and the Tsuzuki Brothers to counter drug-related threats.

Her personality blends resolute determination with a steadfast moral compass and a hands-on approach to justice. Sharp-witted and principled, she acts decisively when confronting injustices. Despite her composed professionalism, she occasionally reveals a klutzy side and unabashedly acknowledges her male colleagues’ physical attractiveness, adding levity to her driven nature.

To combat a dangerous drug endangering Tokyo, she collaborates with investigators, informants, and specialists, leveraging her pharmaceutical expertise and scientific acumen to analyze narcotics cases and build a multidisciplinary task force.