Eren was a young adult man of above average height and muscular build. He had a reasonably long, rounded face and sizable, expressive, gray eyes. His hair was long and black, and his bangs fell in a natural, middle-parted, curtain-type style. His hair fell to his shoulders. After his training and during his time as a soldier, he became very physically fit and muscular. He had a slight mustache and goatee, as well as bandages that cover his forehead and left eye.