Eijiro is a muscular young man of average height and a rather impressive physique for his young age. He has red eyes that are pointed slightly inwards and a small scar just above his right eye, which Horikoshi admits he frequently forgets to draw. He also has small eyebrows and pointed teeth. His hair is somewhat long, dyed a bright red, and spiked away from his head at all angles with gel, two more pronounced tufts spiked on either side of his forehead like little horns.