Braun family

The Braun family (ブラウン家) is an Eldian family residing within Liberio. Reiner Braun, the inheritor of the Armored Titan, hails from this family, as well as Gabi Braun who is likely to inherit the Armored Titan.

History
At some point, Karina met a Marleyan man and later gave birth to Reiner. However, unions between Marleyans and Eldians are forbidden, so she had to remain in the internment zone with her son. Karina later revealed his origins to him and wished they were born Marleyans.

This led Reiner to become a Warrior cadet with the goal to gain one of the Nine Titans and make his mother and himself honorary Marleyans. He succeeded in becoming a Warrior, was praised for his loyalty, and inherited the Armored Titan in 843. Two years later, he took part in the Paradis Island Operation and infiltrated the Walls.

Sometime later, Gabi followed her cousin's footsteps and joined the Warriors. Her achievements allowed her to become a serious candidate for the inheritance of the Armored Titan.

Marley arc
As the Marley Mid-East War is coming to an end, the Marleyan army is fighting at Fort Slava. Gabi finds an opportunity to prove she deserves to become the next Armored Titan, and manages to blow up an armored train, which allows the Jaw Titan to penetrate their enemy's defenses. As the Armored Titan, Reiner joins the battle and proceed to kill the remaining soldiers.

At the end of the war, Reiner and Gabi go back to Liberio where their relatives are waiting for them. The whole family has dinner and listen to Gabi telling them about the Fort Slava battle. Her parents express their pride and when Karina asks about Gabi's chances to inherit the Armored Titan, Reiner assures them she will definitely have it. Karina expresses joy at the idea of having two Warriors in the family, then complains about the islanders' existence, which leads the family to ask Reiner about his time in Paradis.