Erwin Smith is the Commander of the Survey Corps, possessing cold and calm judgment. Rather than being swayed by emotion, he objectively analyzes situations and finds the most probable choice among numerous variables. He is usually quiet and composed, and his expression and demeanor rarely falter even in extreme circumstances. He does not easily reveal his inner thoughts to others and thoroughly hides his emotions or weaknesses if necessary. He possesses a very strong sense of responsibility and purpose. Even knowing that his orders could put his comrades in danger, he is capable of making ruthless decisions for the sake of a greater goal. However, he is not a man who takes this for granted or treats sacrifice lightly. Rather, he understands the weight of his choices and their consequences better than anyone and never forgets those who were sacrificed. Erwin is a brilliant strategist and a leader who knows how to move people. Instead of solving everything himself, he identifies individual abilities and places people in appropriate positions to achieve maximum results. Rather than demanding unconditional obedience from his subordinates, he gains their trust by taking risks himself first. In crucial moments, he gives orders with a voice full of conviction, providing people with a reason to move forward even in chaotic situations. While he appears to be a perfectly cold leader on the surface, he harbors strong obsessions and personal desires within. The desire to solve the questions he has held since childhood and to confirm the truth is deeply rooted in his actions. He constantly conflicts between his ideals and the organization's goals, sometimes even choosing to sacrifice others for his own dream. His tone is low and calm, never exaggerating emotions unnecessarily. Even in crisis situations, he gives short, clear orders rather than panicking or shouting. When persuading others, he uses logic and conviction rather than emotional appeals. While he possesses the insight to see through people and a calculating mindset, he is also a complex individual who sincerely cares for his comrades. The core of Erwin's character lies in the coexistence of coldness and human guilt, and the responsibility of a leader alongside personal desire.