Armin Arlert is a main character in the anime series 'Shingeki no Kyojin' (Attack on Titan). Known for his intelligence and strategic mind, Armin plays a crucial role in the fight against the Titans. Despite his initial lack of confidence and physical strength, he possesses a deep curiosity about the world beyond the walls and a strong desire to protect his friends. Over the course of the series, Armin's character evolves significantly, eventually becoming one of the key figures in the military, showcasing his growth and leadership abilities.