Kusue Hakozaki, a middle school student burdened by delicate health, depends on monthly medication costing 50,000 yen to sustain herself. Her academic aspirations center on pharmaceutical research, driven by a determination to develop treatments for her condition. Though initially uneasy around male classmates, she champions authentic justice over performative acts, steadfastly defending the vulnerable despite her physical constraints.

Summoned to a parallel world among the first wave of heroes, she initially adopts the Warrior class but proves ill-suited for swordplay due to her fragile physique. Switching to the Heavy Armored Warrior specialization enables shield-based defense, yet her limited combat efficacy earns early dismissals from peers. Persistent self-sacrifice in protecting allies slowly reshapes their views, culminating in one comrade acknowledging her latent fortitude as eclipsing their own.

Engagements with a pragmatic ally reveal ideological divides. While respecting their tactical acumen, she challenges strategies fixated on retribution, advocating instead for dismantling harmful value systems at their roots—a stance forged by witnessing how rigid doctrines deepen suffering for foes and allies alike.

Prior alliances with another hero predate the main protagonist’s summoning, marking her as a seasoned team member. Her unyielding dedication to selflessness prompts allies to reevaluate core priorities, framing emotional awareness and ethical integrity as vital complements to survival. Though her physical constraints persist, her evolution lies in guiding group dynamics through compassionate leadership and conviction-driven choices.