After Vig’s death, Yago joined the Training Corps and struggled to conceal his Titan power while building bonds with Annie and the other cadets. A mysterious vision called him the Fate Titan, and the arc ended with him showing dangerous skill during Omni-Directional Mobility Gear training as fellow recruits were injured and killed.
Yago’s training and growing ties with Annie, Eren, and the other cadets gave way to the fall of Trost, where he fought Titans while searching for his classmates. The survivors regrouped at the supply station, replenished their gas, and prepared to investigate the pointy-eared Titan.
Yago joined the Survey Corps, pursued the Female Titan, and revealed his own Titan power while trying to save Annie. The story then traced his childhood with Annie in Marley, ending with Yago’s apparent death after Dr. Ebson’s experiments and Annie returning to find him.
Yago reunited with Annie, fought Zeke’s Warriors, and escaped with her as the Survey Corps faced Reiner and Bertholdt. The story left Yago and Annie confronting Levi’s group in Trost, with Yago demanding to be heard.
Yago and the Survey Corps uncovered the false royal government and fought their way into the Reiss estate to rescue Eren and Historia. Historia rejected the royal succession, but Rod forced her to transform, leaving the group scrambling to save her.
Yago saved Ymir and helped the defenders repel Zeke’s assault, then encountered an older Eren who showed him a world without the Fate Titan. After Historia’s coronation was threatened by Claude’s family, Yago and his allies defeated the kidnappers, while Marley’s warriors began weighing their next move.
After Historia’s coronation, Erwin led the Survey Corps to reclaim Wall Maria, where Yago defeated Marley’s forces and the Scouts captured Zeke, Pieck, and Reiner. Zeke’s trapped Eldians transformed and attacked Shiganshina, but Yago reached the Coordinate with Eren and Historia, and Eren’s request made the Titans disappear as the Founding Titan’s power was sealed.
Yago helped Paradis secure support from Zeke and the Marley Volunteers while the Scouts reclaimed Wall Maria and reached the sea. As Paradis began negotiating with Hizuru, Yago’s plans to protect Annie and confront Marley remained in motion, and an approaching fleet threatened the voyage home.
Yago traveled through Marley, reunited Annie with Mr. Leonhardt, and infiltrated the Eldian army under the identity of a dead officer. He gathered intelligence for Paradis while entering a regiment led by Selina and the Restorationists, where a supply dispute was already turning violent.
Yago took command of the Warrior Candidates, turned Selina’s Restorationists into the Eldia Revival Army, and recruited Aili as an undercover ally. As Marley forced the Third Regiment into a battle at Grayle Fortress, Yago prepared his soldiers to fight while keeping rebellion as a last resort.
Yago tried to navigate Marley’s war and the competing Eldian factions as Marley captured Grayle Fortress with a Titan assault and unveiled three new Warriors. The Eldia Revivalists gained influence on Paradis Island, while Annie appeared to decide to travel to Marley to find Yago.
Yago and the Eldian Revival Army gained ground as Marley defeated the Middle Eastern Union, while Yago uncovered clues connecting Ebson to Norman. The arc ended with Aili warning Yago that Ebson was plotting something at Marley’s Joint Conference.
Yago and the Eldia Revival Army carried their operation into Marley during the World Joint Conference, where Willy exposed Ebson’s research and declared war on Eren. As Titans and armies clashed across Liberio, Yago transformed into the Fate Titan after Ebson’s forces targeted him.
Yago and the Restoration Army captured Marley’s capital, defeated Ebson’s forces, and freed the Eldians in Liberio. Back on Paradis, the army’s new name and growing influence sharpened political divisions as Parliament debated how much power to give it.
Yago helped stop Arno’s coup, but Zeke’s contact with Eren drew them into the Paths, where Ymir revealed more about Yago’s Titan powers and their shared past. Ebson confronted Yago over Norman’s death and left Yago’s fate unknown as war approached.
Yago strengthened Paradis and confronted the growing threat of the Far Eastern army, while Eren defeated him in a spar and the two entered the Paths to seek the Rumbling. Ymir refused Yago’s request, then showed him memories of Norman Russell’s early experiments into Titan power and the possibility of granting it to people without Eldian blood.
Yago led Paradis Island and its allies into the war against the Far East while preparing territorial gains for Eldia and a route for the Rumbling. Eren awakened two hundred thousand Colossal Titans, and Historia secretly joined him as the Allied Army faced the Far East’s buildup in Hera Province.
Yago’s strike on Scarlet Base exposed Ebson’s experiments and triggered battles among the Titans, while the Far East devastated its enemies and the Rumbling advanced. After confronting Ebson and taking in the Colossal Titan’s blood, Yago began changing as Eren watched the Titans continue their march.
Yago stopped Ebson and the Rumbling ended, but he was lost inside the collapsing crystal. As the world settled into an uneasy peace, Annie and their friends freed Eren and set out to bring Yago back.
Annie and the rescue squad fought through the Red-Eyed Titans to free Yago from Hallucigenia, and Yago destroyed the creature at the cost of his life before returning to Annie. The story ended with Yago and Annie’s wedding and their family life, then introduced the next story’s protagonist.