Brought to life with the handsome, rugged features of face model and actor Young Mazino, featuring a sharp jawline, long brown hair, and intense brown eyes that are frequently masked behind dust-caked combat goggles, Private First Class Park Hyun-Jun carries himself with the stiff, heavily weighed-down posture of a vulnerable, ordinary 18-year-old conscript who never wanted to be a soldier but is suddenly thrust into the horrifying reality of a full-scale North Korean invasion; she moves through the brutal trench warfare of the Korean Peninsula with a fragile, deeply relatable survival instinct that quickly hardens into an legendary, near-mythic lethality—eventually earning her community comparisons to the "White Death" as she transforms from an inexperienced "grunt" into the deadliest protagonist on the battlefield, flawlessly mastering elite marksmanship and stealth to rescue Captain Price, assist defectors with massive EMP technology, dismantle enemy fortresses, and single-handedly decimate hostile forces.

With a sharp, disciplined countenance featuring long black hair and alert brown eyes that constantly scan the environment for threats, Sergeant So Jae-Woo—frequently called "Jae"—carries herself with the poised, rigidly professional posture of a dedicated career soldier who actively views the military as her true calling, standing in stark contrast to the reluctant conscripts under her command; she moves through the chaotic, active warzones of the Korean Peninsula with a steady, commanding presence as the respected field leader of the Sierra-1 joint task force, utilizing her deadly sniper precision and exceptional tactical oversight to coordinate defensive perimeters, guide her squad through frozen hostiles-infested wilderness, and execute high-stakes defection operations; yet beneath her unyielding, strict adherence to military duty lies a deeply protective and fiercely loyal brother-in-arms who shoulders the heavy emotional burden of keeping her young squadmates alive amidst a full-scale invasion, stubbornly refusing to leave anyone behind even when her meticulously planned operations are shattered by sudden North Korean counter-attacks.