Armin is arguably the most "human" character of the trio. He lacks the rage of Eren and the physical prowess of Mikasa. He represents , but also the pain of sensitivity.
: An incredibly skilled soldier and Eren’s adoptive sister, dedicated to protecting him at any cost. Armin Arlert attack on titan season 1 characters
Jean is the unsung MVP of Season 1. While Eren is shouting about killing every Titan, Jean is the voice of the ordinary person who just wants to live. Armin is arguably the most "human" character of the trio
The tragedy of Season 1 is that the characters believe that if they can just push back the Titans, they will be free. The depth of the writing lies in the audience knowing that this is just the beginning of their nightmare. They start as victims of a horror movie, and by the end of the season (with the reveal of the Female Titan and Annie), they realize they are players in a political war they don't yet understand. : An incredibly skilled soldier and Eren’s adoptive
Unlike the adults who have made peace with their cage (the "cattle" philosophy), Eren is allergic to stagnation. His character arc in Season 1 is a brutal subversion of the shonen "dream." Typically, a protagonist wants to see the world; Eren wants to see it because he knows he is forbidden from it.