Louise, a young girl residing in Trost District during a Titan invasion, finds herself trapped with her mother when a merchant obstructs the gate’s evacuation. After witnessing Mikasa Ackerman eliminate an Abnormal Titan and compel the merchant to retreat, Louise becomes fixated on Mikasa’s prowess, propelling her to enlist in the military and later the Survey Corps. This pivotal moment cements her conviction that strength is paramount for survival and safeguarding others. Four years post-Trost’s devastation, Louise engages in the Raid on Liberio as a Scout Regiment recruit, combating Marleyan forces. She aids in targeting the Cart Titan’s operator and orchestrates tactical withdrawals amid enemy assaults. Post-battle, she boards an escaping airship and observes Sasha Braus’ fatal shooting by Marleyan youths. Her futile efforts to stabilize Sasha intensify her resolve to embrace uncompromising methods. Upon returning to Paradis, Louise abandons the Survey Corps following Eren Yeager’s arrest, divulging details of his confinement to incite public dissent. Arrested by Hange Zoë, she defends her actions as necessary defiance against existential threats. Freed by Yeagerist allies, she aligns with Eren’s faction, aiding in tracking Zeke Yeager and repelling Marley’s assault on Shiganshina. A Thunder Spear explosion during the battle lodges a shard in her abdomen, leaving her mortally wounded. Hospitalized and facing death, Louise admits to Mikasa that Eren urged her to discard Mikasa’s scarf—a token she retained as a tribute to her idol. Mikasa retrieves the scarf as Louise affirms her unwavering commitment to Eren’s cause, dying without regrets, convinced his crusade ensured Paradis’ survival. Louise’s trajectory evolves from idealizing Mikasa’s physical might to endorsing Eren’s ruthless pragmatism. Her choices—fueled by idolization and survivalist pragmatism—mirror the narrative’s exploration of sacrifice, fanaticism, and the blurred ethics of war.