Eren was a young man of average height and muscular build. He had a fairly long, yet rounded face, and sizable, expressive, teal-green eyes. His eyebrows were sparse and often furrowed, making him seem troubled or annoyed. Eren's hair was short and dark brown, with his bangs falling naturally into a middle-parted, curtain-type style. His complexion also seemed somewhat tan. After his training and during his time as a soldier, he became very physically fit and muscular.