TV-Series
Description
Erwin Smith teaches at Attack Junior High School and advises its Survey Club. He presents a professional image with neatly parted blond hair, defined eyebrows, and typically wears a dress suit with a green necktie; a polo shirt or emerald bolo tie marks his casual attire.

Publicly benevolent and approachable to both human and Titan students, he earns broad respect for resolving conflicts peacefully. Privately, he harbors intense contempt for Titans due to their mistreatment of humans. This duality drives him to secretly discipline bullying Titan students, using physical force when necessary while maintaining a diplomatic facade. His history includes ruthlessly beating Titans who stole lunches during a field trip after fellow teacher Nile Dok refused to intervene.

Erwin guides students through school activities, such as overseeing the customary 57th Test of Courage for new club members, where he referenced campus legends of a ghostly girl. He coordinates crisis responses, like deploying staff during a Titan invasion at the 104th festival.

Increasing restrictions on human students, which Erwin attributes to Nile reporting his past actions, prompt him to attempt resignation. He admits his role in disciplining Titans to alleviate the situation. Initially critical of Erwin's perceived weakness, Eren Yeager tears up the resignation letter, pleads for him to stay, and acknowledges Erwin's indispensable role protecting innocent students. This moment solidifies Erwin's commitment, leading him to vow collective action against threats to Titan Junior High.

His relationships include ongoing friction with Nile Dok over disciplinary methods and mentorship of students like Hange Zoë, whom he comforted after her lunch was stolen. Despite Eren's initial hostility, Erwin recognizes his determination and entrusts him with supporting the Survey Club during the resignation attempt.

Erwin's character arc concludes with him reaffirming dedication to safeguarding the school's coexistence, symbolizing his evolution from a covert vigilante to an openly committed protector.