Introduced as the childhood friend of fellow 104th Trainees Squad members Eren Yeager (voiced by Yuki Kaji and Bryce Papenbrook) and Mikasa Ackerman (Yui Ishikawa, Trina Nishimura), Armin Arlert (Marina Inoue, Josh Grelle) is a highly intelligent strategist in Attack on Titan ( Shingeki no Kyojin ), the wildly popular manga series by Hajime Isayama published by Kodansha which also saw success for its anime adaptation by Wit Studio and Production I.G.
As a child, Armin shared his passion for the world beyond the Wall with Eren. He was very smart although shy and often bullied and was often protected by Eren and Mikasa which unfortunately left him without much self-confidence.
He finds his worth as a member of the 104th Trainees Squad, however, setting aside his fear by choosing to protect his friends and neighbours against the Titans. His does this using his strategic mind, deciding that to be the best way to keep up with the more combat-oriented talents of Eren and Mikasa.