Armored Titan

"Nothing seems to work on him... not Eren's attacks, not my blades. And he's not like Annie. His whole body is constantly hard."

- Mikasa struggles against the Armored Titan's power

The Yoroi no Kyojin (鎧の巨人) is one of the Nine Titans that possesses armored plates of skin across its body. It is currently in the possession of Reiner Braun, though it will soon be passed on to a cadet from among the warriors.

Armored skin
The defining feature of the Armored Titan is the all-encompassing layer of plated, armor-like segments of hardened skin protecting the Titan body. This armor is capable of protecting the Titan form from significant amounts of damage, even a direct hit from a cannon or the ultrahard steel blades of vertical maneuvering equipment. However, the armor has some limitations and is not capable of protecting the user from high-power weaponry such as the Mid-East Allied Forces' anti-Titan artillery.

One disadvantage of the Armored Titan's skin is the decreased speed of the Titan form. Whether due to increased weight or restrained movement, the Armored Titan is incapable of moving at high speeds when completely armored. This can be alleviated if the user chooses to shed segments of the armor to increase movement capability, such as the armor behind the knees.

History
The Armored Titan, like all the Nine Titans, was brought into the world after the death of Ymir Fritz. In the 1,700 years following her death, the Armored Titan was held in the possession of one of the eight warring Eldian houses subservient to the Founding Titan. After these seventeen centuries when the 145th King of the Fritz family abandoned the conflicts of Eldia and relocated to Paradis, the Armored Titan was taken by the nation of Marley during the Great Titan War.

At some point before the year 845, Reiner Braun was chosen to inherit the power of the Armored Titan. Some time later, the nation of Marley sent out Reiner, Bertolt Hoover, Annie Leonhart, and Marcel across the ocean to the island of Paradis as the start of the plan to regain the Founder. After arriving on the island and venturing northwards to the Walls, Reiner entered into Shiganshina District, the southernmost territory of Eldia, after Bertolt destroyed the south gate with his Colossus Titan. As panicked Eldians fled the city while Titans swarmed in, Reiner's Armored Titan advanced to the north gate and charged it, breaking through and breaching the northern part of Wall Maria. Reiner joined his fellow surviving warriors in entering the walled territory during the chaos, and he would not use the Armored Titan for another five years.