Reiner Braun (ライナー・ブラウン ) is the Vice Captain of the Warrior Unit and the protagonist of Attack on Titan from the Marleyan perspective. He is the illegitimate son of an Eldian and a Marleyan and grew up in Liberio's internment zone; eventually, he was selected as a child to become one of Marley's Warriors. At the age of ten, he inherited the power of the Armored Titan.
In the year 845, he infiltrated Paradis Island alongside Bertolt Hoover, Annie Leonhart, and Marcel Galliard as part of an operation to reclaim the Founding Titan. He joined the Survey Corps after graduating 2nd in the 104th Training Corps.