Shadow is a black-furred anthropomorphic hedgehog. He has red eyes, a patch of white fur on his chest, a black nose, a tan muzzle, and small, triangular ears with tan canals. He also has six quills on his head, four of which curve upwards while the other two curve downwards, two spines on his back, and a short, pointy tail. He has red stripes on each of his head quills, around the edges of his eyes, and on his arms and legs. He is the opposite of Sonic, personality wise. He is brooding.