Eren Yeager is the protagonist of the movie, and his character undergoes significant development throughout the story. Initially, Eren is portrayed as a hot-headed and impulsive young man driven by his emotions. However, as the story progresses, he learns to control his emotions and develop his skills as a fighter.

On the day of their induction into the Scout Regiment, a group of elite soldiers who fight outside the walls, Eren and his friends discover that the Titans have breached the outermost wall, and their hometown is under attack. Eren's mother is eaten by a Titan, and he vows to reclaim the world from these monstrous creatures.

Armin Arlert is Eren's friend and strategist. He is depicted as an intelligent and resourceful individual who often provides crucial insights that help the group survive. Armin's character serves as a voice of reason, providing a counterbalance to Eren's emotions and impulsiveness.

Overall, "Attack on Titan Part 1" is a must-watch for fans of dark fantasy and action movies. It is a thought-provoking and emotionally charged film that will leave viewers eagerly anticipating the next installment in the series.

The Titans serve as a symbol of the unknown, representing the uncontrollable forces of nature that threaten humanity. They also symbolize the fear of being consumed by something greater than oneself, reflecting the existential dread that pervades the movie.