Tuan Kirie inhabits a meticulously regulated future where advanced medical systems govern health and well-being. Distinguished by long crimson hair, scarlet eyes, and a red WHO uniform denoting her authority, she enforces societal stability as a helix inspector. Her path was forged in tragedy: during youth, she and two friends, influenced by peer Miach Mihie, staged a suicidal protest against oppressive norms. Miach’s death and Tuan’s survival with Cian Reikado propelled her into the WHO, channeling guilt into vigilance. When investigating mass suicides, her analytical precision and relentless pursuit of truth expose concealed corruption, dragging her back to unresolved grief and ideological clashes with Miach’s legacy. Balancing duty to systemic order against echoes of rebellion, Tuan grapples with the cost of control in a world where personal freedom and collective safety collide.