|The difference between us is that I'm prepared. To shoulder the fate of us Eldians...and to slaughter that island of devils who've done nothing but make us suffer! I'm gonna win this battle and prove that the Eldians left are good Eldians! I refuse to lose till I free everyone from the internment zone!|
|— Gabi proclaims her resolve|
Gabi Braun (ガビ・ブラウン Gabi Buraun?) is an Eldian serving in the Marleyan Military and the cousin of Reiner Braun. She is a candidate (戦士候補生 Senshi Kōho-sei?) that is likely to inherit the Armored Titan's power.
Gabi is a short, young girl with a petite yet athletic build. She has a small face with wide bright brown eyes, defined eyebrows, a small upturned nose and a notably radiant smile. She also has medium length dark brown hair which she keeps half tied above her head with large strands on each side of her face. Like her fellow Warrior candidates, she wears the standard Marleyan soldier uniform consisting of a white jacket and pants, supply packs on the hip, suspender straps, a hard hat with a stripe around it, and knee-high black combat boots.
As an Eldian, her uniform is different from the Marleyans, as her shirt collar has a small badge with the Eldian star instead of a small clip and her hat has a white stripe with the Eldian star on it instead of a pure black stripe. However, underneath her uniform, she wears a short tattered white dress with poorly made thigh-length white shorts. Gabi's casual wear consists of a white shirt, black dress, light brown thigh-length mantle, and brown loafers. As is law in Marley, Gabi also wears the Eldian armband as all her family members and ancestors residing there do so as well.
Gabi is very passionate and head-strong, expressing her emotions and opinions without inhibition and confident in her superiority over the other Warrior candidates. She is also brave, possessing boundless determination, and willing to put her life on the line to complete a goal for a perceived greater good. She also shows concern for her fellow Eldians, risking her life to take out a train instead of letting 800 of her brethren charge the gunmen guarding their objective.
However, these attributes can also make her somewhat overbearing and domineering. This causes her to be tactless at times, forcing her opinions on others and taking charge regardless of whether it was asked for or not. She mostly shows this side around her fellow Warrior candidates, considering herself their de facto leader to an extent, and even threatening to 'punish' them when they disagree with her. Nonetheless, she is friendly enough that they have no issue with spending their leisure time with her.
Gabi and her fellow Warrior candidates are placed on the front lines during Marley's attack on Fort Slava. When Falco's brother Colt returns to their hiding trench with his wounded brother, Gabi and her fellow candidates tend to his wounds as she re-explains their objective to him. Falco asks why they are on the front lines as candidates and Gabi explains that it is so they can be evaluated by Commander Magath for their capabilities as successors to the Armored Titan power. When Zofia begins to boast about her grades, Gabi interrupts her by explaining her superior resolve to kill all the people of Paradis Island and free the people trapped in Liberio.
When the enemy emerges with an armored train, Commander Magath makes a plan to have 800 Eldian Warriors charge the mid-eastern gunmen guarding the base to create an opening. However, Gabi volunteers to use a bomb she made to take out the anti-Titan artillery alone, without losing any soldiers. She is initially denied, but Gabi is able to convince Magath to let her go. Removing her uniform and tying the bomb to her leg, Gabi leaves the ditch and approaches the gunmen with her hands up. She pretends to trip and then throws the bomb on the train tracks, derailing the train and killing the gunmen as she runs away laughing. One of the survivors opens fire, but Gabi is saved by the arrival of Galliard's Titan, which shields her.
While she puts her clothes back on, she sees Falco bringing an injured enemy soldier to the trench. She mocks him, telling him that there is no way he can surpass her as a possible heir of the Armored Titan by following international law. After the cadets finish tending to their wounded, they watch the second phase of the assault as Zeke Jaeger and her cousin Reiner attack the fort.
After the battle has ended, Gabi is seen waiting with her comrades in a port. The children state how the power of the Titans is starting to lose its dominance. They also see several enemy soldiers who suffer from Post-Traumatic Stress Disorder and come to the conclusion that those survivors will only give the Eldians a worse reputation. When Reiner appears, she seems very happy upon seeing him and hugs him. She convinces Reiner to explore the city with her and the other candidates before they return to Liberio.
As the Eldian unit is returning to Liberio via train, Colt gets drunk and starts praising Gabi for her accomplishments at Slava. Motivated by his speech, all present soldiers start drinking and cheering her name while Gabi cheers for herself. The train reaches Liberio and Gabi jumps out eagerly, yelling with excitement to be home, before being quieted a hungover Colt. Galliard and Pieck congratulate Gabi for her accomplishments at Slava. The Eldians proceed to Liberio's internment zone on foot, where Gabi is reunited with her family.
That night, the Braun family eats dinner together. Gabi recounts her experience of blowing up the Armored Train, warranting congratulations from her family. When asked by his mother, Reiner admits that Gabi is currently first in line to inherit the Armored Titan. Karina says that all that is left to do is to exterminate the people of Paradis Island, which Gabi swears to do. When the topic of Reiner's time in Paradis Island appears, Gabi expresses sympathy towards Reiner, telling her family not to make Reiner talk about it. Despite this, Reiner begins to tell the family about his experiences with the people of Paradis Island, but his words confuse Gabi as the Wall people are not painted in a negative light compared to typical Marley propaganda. This confusion is quickly stamped out when Karina begins to shower Marley propaganda back onto Gabi.
As Reiner and Gabi walk to the Warriors' headquarters the next morning, Reiner notes that Gabi is behaving differently. Gabi accuses Reiner of lying to her, but her cousin insists that he has nothing to lie about. Once she arrives at the Warriors' headquarters, she begins training with Falco.
During training, she is beaten by Falco in a footrace for the first time. On the way back to the internment zone, she is annoyed by a soldier's comment and reminds her friends that her achievements make her a better candidate than Falco. Seeing how determined he looks, she asks him about his motivations, reminding him of his brother's status. Falco tells her it is for her sake, which surprises and angers her, having the feeling that he gets in her way. The same day, she watches the preparations for the festival with Udo and Zofia. As they discuss about the Eldian's situation, she reminds them of their job for the night and tells them to correct their quirks, then chokes them as a punishment for having cheered for Falco earlier.
In the evening, she works as a waitress with her fellow candidates for the ambassadors welcome party. Seeing Udo having trouble, she approaches him, and the four candidates then listen to Willy Tybur's declaration to the guests.
The following day, she wakes up late and gets out to see many attractions in the internment zone. She is joined by her friends who tell her about the festival and take her with them. During the day, she enjoys the event with Reiner and the others. Later on, Reiner has to drag her as she has eaten too much. At night, her group joins the other Warriors to hear Willy Tybur's speech.
Gabi watches Tybur's production along with her fellow Warriors and Warrior candidates. When Tybur reveals that it was actually Karl Fritz, not the Tybur family, who ended the Great Titan War, Gabi and her fellow candidates are left stunned. She and the others hear the rest of Willy's speech and his declaration of war against Paradis Island. Suddenly, Eren's Attack Titan comes forth to crush the stage, sending Willy's eviscerated corpse into the air and rubble hurling towards the crowd.
Gabi is dazed by the sudden attack, needing to be helped to her feet by Colt. She is traumatized to see Zofia's corpse beneath a rock beside her, and is grabbed by Colt to help her escape from the area. Udo, who had been with them, breaks off to check on Zofia. However, the crowd separates Udo before trampling him in the pandemonium. Colt and Gabi are forced to take cover behind rubble, and wait for the panicked crowd to pass them. Later on, they flee the area that had become a battlefield between the Attack Titan and the War Hammer Titan. After recovering Udo's mangled form, she asks Colt how Udo is, but he is unable to give her a straight answer, saying they should go to a hospital instead.
They get to a hospital and Colt begs a doctor to take a look at Udo, but the doctor refuses, stating that their beds are full and Udo is already dead. Disheartened, Colt puts Udo's corpse on the ground and asks Gabi to stay with her family and get as far away from the plaza as possible while he goes to look for Falco, ensuring her that the Warrior Unit will defeat the invading Titans. However, she refuses, and announces that she will go to fight too, because she cannot understand why Udo and Zofia were killed. She then runs towards the battle zone, as Colt vainly tries to stop her.
Finding a convoy of reinforcements, Gabi requests to be allowed in one of the cars, but the gate guards order her to go home. At that moment, the area is attacked by the Survey Corps, who strike the soldiers with bombs and bullets. As one of the guards tells Gabi to run, he is also killed by a sniper atop a nearby roof. Gabi watches as the woman and her comrade flee from the scene, and then grabs the rifle left by one of the fallen guards. She runs towards the plaza, declaring that she will kill Eren.
As a member of the Marleyan army and a candidate to inherit the Armored Titan power, Gabi has gone through a thorough military training. She is a very resourceful individual, creating a make-shift bomb in the midst of the battle of Fort Slava. She also had the idea of simulating her surrender in order to launch the bomb from a more favorable position.
She is noted by many to be the most favorable candidate to inherit the Armored Titan. It can be assumed that her hand to hand combat prowess is considerably superior to Falco's, since he lamented his poor performance as a candidate while having several bruises on his face after one of their sparring sessions.
- Isayama has revealed that Gabi's design was partially based on a sketch he made of a female version of Eren Jaeger.
- Sketches of Gabi included in the Attack on Titan: Final Manga Exhibition revealed that a working name for her was Gabi Lübke (ガビ・リュプケ Gabi Ryupuke?).