Eren was a young man of average height and muscular build. His facial features strongly resembled his mother's; he had a reasonably long, rounded face and sizable, expressive, green eyes. His hair was short and black, and his bangs fell in a natural, middle-parted, curtain-type style. During college, Eren grew his hair down to his shoulders, sometimes pulling it back into a man bun or half-up and half-down. Eren was best described as hardheaded, strong-willed, passionate, and impulsive.