Liberio

The Reberio Shūyō-ku (レベリオ収容区) is an area of land designated by Marley for people of Eldia to live in, separate from the rest of the population.

History
At the end of the Great Titan War, King Fritz and many Eldians settled on the island of Paradis, fleeing from the mainland war. However, some Eldians stayed behind on the continent were overtaken by Marley, the enemy nation. Rather than slaughtering the remaining Eldians on the continental mainland, the nation of Marley chose to isolate the Eldians into designated internment zones. While Marley claimed to be extending mercy towards the devil's descendants, the internment zones were in reality created to store Eldians until the Founding Titan could be acquired from the King of the Walls on Paradis in the future.

One of the internment zones established on the mainland was the Liberio Internment Zone. In Grisha Yeager's childhood, he and his family lived a quiet life in Liberio until Grisha decided to wander beyond the internment zone walls with his sister Faye without authorization. They were found by Public Security Authority officers Krueger and Gross, the former punishing Grisha while the latter claimed to escort Faye back to Liberio. In reality, Gross had taken Faye to his home and fed her to his sons' dogs, leaving her corpse by the river near Liberio. This event shattered Grisha's respect for his unresponsive father and kindled a self-hatred over his foolish decision.

After some years had passed, Grisha joined the Eldia Restorationists, a secret rebellious group in Liberio who, while cooperating with the Eldian spy under the alias "the Owl", sought to restore Eldia's former glory. There he met Dina Fritz, the last descendant of the members of the royal family which remained behind on the mainland after the war. Grisha married Yeager a year after joining the Restorationists, and together they became the parents of a child named Zeke, whose royal blood Grisha planned to exploit for Eldia's favor in the future.

Years later, the Marley government announced to the people of Liberio that a warrior program would accept Eldian children between the ages of five to seven to inherit the powers of the seven Titans that Marley had taken during the war. Seeing an opportunity, Grisha sent his son Zeke into the warriors to act as a double agent for Eldia. However, when Zeke turned seven, he turned the Eldia Restorationists in to the Public Security Authorities, who arrested them all and sent them away to the island of Paradis to become mindless Titans.

A decade after the capture of the Eldia Restorationists, Gabi was born in Liberio.

Return to Shiganshina arc
In the aftermath of the battle of Shiganshina District, the surviving members of the Survey Corps learn of the existence of Liberio and the rest of the outside world through Grisha Yeager's autobiographical writings, kept hidden in the basement of his former home.

Four years later, the nation of Marley wins a victory against the Mid-East Allied Forces. Gabi, a candidate to inherit the Armored Titan, as well as her other warrior cadet comrades, are later told that they will soon be able to return to Liberio.