Reiner Braun

Reiner is a graduate of the 104th Trainees Squad and graduated in the top ten of his class. He was assigned to the front guard after the second attack of the Colossal Titan

History
Like many, not much is know about Reiner's early life. Both he and Bertholdt come from a village in the mountains south-east of Wall Maria. When the Colossal Titan and the lesser titans attacked, the warning came too late to his village. He and Bertholdt barely managed to make to to the safety of Wall Shina.

During his time training to become a soldier, he was considered to be one of the most adept with the 3D Maneuver Gear. When Eren was having trouble during this training, he asked advice from both he and Bertholdt. As a sort of repayment, Eren worked with him in hand-to-hand combat training.

Current Plot
Noting Eren's desire to apply to the Scouting Legion even after witnessing the attack in the Shiganshina District, he reveals that he wants to go back to his home town, knowing that there is likely nothing to return to. He eventually graduated in the top ten of his trainee class, coming in at second, just under Mikasa Ackerman. As part of the defensive effort of the military after the second attack of the Colossal Titan, he eventually found himself with the front guard. However, with the supply team stuck in the headquarters, he was essentailly immobilized with many of his teammates on a rooftop. Joining Jean's group in the rush to the HQ, he was among the survivors. With the subsequent arrival of Armin and Mikasa, by way of rogue titan, he helped to clear and secure the supply room.

Initially sceptical, Reiner suggested they help the rogue titan when it was being overwhelmed by a group. However, it turned out not to be necessary when it broke free at the sight of the titan that killed Tomas. He was among the first people to know about Eren's titan form, when he emerged from the giants body. Later this same day, after seeing what appeared to be titan vapor from inside the city, he and a small group scaled the wall to see what was happening. Over the wall they found Eren protecting Mikasa and Armin from cannon fire, with a shield made from the torso of his titan form.

Reiner would later join the Scouting Legion, together with the rest of the top 10 alumni. During the first expedition they take part in, he teams up with Jean to save Armin fom the female-type titan after his horse runs away.

After the capture of Annie, Reiner was later seen in an abandoned mansion next to Sasha when Wall Rose supposedly got breached. He was soon dispatched to find all survivants and tell them the news (without his 3D Maneuver Gear).

After that he and his squad went searching for the gap, though found nothing. They met up with another team carrying the same orders and also didn't find anything. The 2 squads join together and go to the abandoned castle Utgard to rest.

Later that night he finds Ymir searching for food before being alerted titans attacking the castle.

Quotes
"You have no chance to survive beyond the wall if you don't have a horse." said to Armin