Eijiro is a muscular young man of average height and a rather impressive physique for his young age. He has red eyes 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, with two more pronounced tufts spiked on either side of his forehead like little horns.