Gabi Braun is a young Eldian from Liberio's internment zone, serving as a Warrior candidate in the Marleyan Military poised to inherit her cousin Reiner Braun's Armored Titan. She possesses a petite, athletic build and medium-length dark brown hair, often kept half-tied. She wears the standard Marleyan military uniform modified with Eldian insignia, including an armband identifying her as a Subject of Ymir; her casual radiant smile contrasts sharply with her intense battlefield demeanor. Raised under Marleyan propaganda, Gabi internalized a fierce hatred for Paradis Island's inhabitants, viewing them as "devils" responsible for Eldian suffering. She exhibits extreme confidence, determination, and bravery, volunteering for high-risk missions. During the Fort Slava assault, she derailed an armored train using a homemade bomb, saving approximately 800 Eldian soldiers from a suicidal charge, earning commendations while highlighting her recklessness. Her worldview fractures during the Raid on Liberio when she witnesses friends Udo and Zofia die in Eren Yeager's attack. Consumed by rage and grief, she infiltrated the Survey Corps' airship and killed Sasha Blouse. Captured and taken to Paradis, she remained defiant, attempting escape and clinging to her belief in Paradisians' inherent evil. Exposure to Sasha's family, particularly Kaya Blouse, eroded her indoctrination; Kaya's kindness and confrontation about Sasha's death forced Gabi to confront the humanity of those she despised. A pivotal shift occurred when Gabi admitted, "There weren't any devils on this island... Just humans," acknowledging her prejudices mirrored Reiner's earlier conflicts. This culminated in a tearful confession to Kaya where she accepted responsibility for her actions and rejected Marleyan ideology. Her transformation was tested during the Rumbling; she allied with former enemies to stop Eren Yeager. Using exceptional sniping skills, she disabled the Okapi Titan threatening Armin Arlert and eliminated Floch Forster and other Yeagerists attempting to destroy evacuation ships. During the battle against the Founding Titan, Zeke Yeager's spinal fluid temporarily transformed Gabi into a Pure Titan; she reverted to human form after Eren's death. In the aftermath, she participated in global recovery efforts, including environmental restoration and aiding refugees. Her relationship with Falco Grice evolved from rivalry to mutual reliance, and she assisted the disabled Levi Ackerman.