Yuna, a young girl orphaned by a lethal attack of infected dogs in a salt mine, emerges as the sole survivor alongside the guarded Van. He adopts her, forging an unshakable bond that reshapes his priorities, anchoring his motivations in her safety and emotional well-being. Her resilience and quiet influence temper his defenses, grounding him in their shared struggle for survival.

Her rare immunity to the canine-borne disease—mirrored in Van—ignites the interest of rival factions desperate for a cure, culminating in her abduction. This sparks Van’s fierce campaign to reclaim her, fueled by their mutual supernatural gifts, rooted in the plague’s enigmatic mysticism. Beyond her survival, Yuna’s existence intertwines with clashes of imperial ambition, ethical dilemmas in science, and fractured societal divides, framing her as a linchpin in both personal and political reckonings.

Though her past before the mine remains veiled, her dynamic with Van challenges conventional notions of kinship, illustrating sacrifice and devotion amid chaos. As a beacon of hope in a fractured world, her story transcends individual struggle, embodying humanity’s fragile persistence against systemic collapse while charting Van’s transformation from protector to something profoundly human.