Armin Arlert, born in Shiganshina District behind Wall Maria, forged an unbreakable bond with childhood companions Eren Yeager and Mikasa Ackerman. His grandfather’s forbidden book, detailing the world beyond the walls, ignited his insatiable curiosity and dreams of exploration—a passion met with mockery by peers, deepening his reliance on Eren and Mikasa for defense and fueling insecurities over his physical frailty. The 845 Colossal Titan assault annihilated his home and family, hardening his resolve to uncover the truth of humanity’s existence and shield it from annihilation. Graduating sixth in the 104th Training Corps, Armin leveraged sharp intellect to compensate for lack of brute strength. His tactical genius emerged in critical missions: unmasking Reiner Braun and Bertholdt Hoover as Titan shifters, orchestrating counterattacks against Annie Leonhart’s Female Titan. Yet beneath his strategic brilliance simmered persistent self-doubt, a gnawing fear of inadequacy beside his battle-driven comrades. The Shiganshina reclamation battle tested his limits. To secure victory, Armin lured Bertholdt’s Colossal Titan into a fiery trap, sacrificing his body to cripple the foe. Near-fatal burns led to his revival through Titan serum, inheriting Bertholdt’s destructive power—a choice prioritizing him over Commander Erwin Smith that seeded guilt but cemented his role as a reluctant leader. Wielding the Colossal Titan’s might, Armin grappled with its horrific cost, notably during Liberio’s assault, where strategic strikes claimed innocent lives. His anguished emergence from the Titan post-battle mirrored the clash between empathy and wartime ruthlessness. Succeeding Hange Zoë as Survey Corps commander, he navigated the Rumbling’s aftermath, bridging Eldia and Marley through fraught diplomacy. From timid dreamer to resolute strategist, Armin’s journey hinged on championing dialogue amid carnage. His fusion of calculated logic and unwavering compassion united foes against Eren’s apocalyptic wrath. In the conflict’s wake, he channeled trauma into rebuilding alliances, steadfast in his belief that humanity’s future lay not in walls or wars, but in understanding the uncharted.