Reiner Braun, a Warrior from the oppressed Eldian population of Marley, was chosen to inherit the Armored Titan for his physical resilience and unwavering loyalty. Charged with infiltrating Paradis Island alongside fellow Warriors to reclaim the Founding Titan, his childhood ambition to restore his family’s standing in Marley—particularly to reunite with his estranged father—fueled his resolve. Assuming a soldier’s identity on Paradis, Reiner’s psyche fractured under the strain of balancing his dual roles as comrade and infiltrator, culminating in dissociative identity disorder. The mission’s collapse and his betrayal of trusting allies deepened his guilt, exacerbating his internal turmoil. Survivor’s guilt haunted him after repeated losses, driving desperate attempts to fulfill his duty despite growing ethical doubts. A climactic clash with a former ally forced him to face his actions’ devastation, triggering a suicide attempt he narrowly survived, followed by a shaky determination to safeguard those he once endangered. In subsequent conflicts, Reiner fought to shield his family and atone, enduring brutal battles that pushed his Titan abilities to their limits while facing former friends. These clashes left lasting scars, both physical and emotional. Tense reunions with family exposed fraught dynamics, as a younger relative’s idolization starkly contrasted his own view of himself as a war criminal. Amid global chaos, Reiner wrestled with the aftermath of his choices, tormented by remorse yet searching for redemption beyond the battlefield. His story closed with a fragile focus on survival and mending fractured bonds, marking a tentative transition from soldier to a man confronting the echoes of his past.