The Armored Titan is one of the Nine Titans in Attack on Titan, the anime adaptation of Hajime Isayama's manga, and its shifter is Reiner Braun, a warrior whose hardened armor makes him almost unstoppable in battle. The cry captures a rare moment when that invulnerable exterior cracks, which is why fans lifted it from the series and shared it across soundboards and editing communities. It remains popular because it instantly signals Titan-level pain, power and tragedy, even for viewers who only recognize the roar from memes and short videos.