Shadow has been noted to physically resemble Sonic though his physical appearance is differentiated in several aspects he is a black-furred anthropomorphic hedgehog with red eyes a patch of white fur on his chest a black nose, a tan muzzle and small and triangular ears with tan canals. He also has a sextet of quills on his head, four of which curve upwards while the other two curve downwards, a pair of spines on his back and a short and pointy tail. He has red stripes on each of his head quills, around the edges of his eyes and on his arms and legs For attire Shadow wears white gloves with black cuffs and red tongues, and Air Shoes which, like his gloves, have black cuffs and red tongues. Shadow also wears Limiter Rings, one on each of his wrists and ankles

E123 Omega design vaguely resembles E102 Gamma, while standing out with a sturdier upper body and arms with red eyes instead of green ones. He is also much shorter than the other models and his shoulders are much larger with a red "Ω" on the front of the left and back of the right with red handlebars on the top. Also, instead of the twin exhaust pipes and the Jet Booster of the first E100 Series robots Omega has one circling pipe around the waist with two flaps attached and having twin jets installed in his back below the hunch The stripe running from his head to stomach has also been changed so that it is a separate piece of metal altogether and not simply painted on like the others and he also has one extra finger and two hands with yellow wrists studded with large spikes like a dog collar just below his stripe is a plate of clear material

Rouge is an anthropomorphic bat with white fur turquoise green eyes that have a pair of large eyelashes on each one tan skin and a curvy figure she has large pointy ears small fangs a small black nose on her muzzle a short pointy tail and a pair of dark purple wings on her back Only her head appears to have fur which flares out into a sextet of points at the back. Rouge usually wears makeup consisting of powder blue eyeshadow and pink lipstick For attire Rouge wears a black bodysuit which includes a skin tight and strapless low cut unitard that sports a pink and heart shaped chestplate outlined with thin white trimming She also wears elbow length white gloves and thigh high heeled boots with pink cuffs to match them with the latter featuring both gray soles and heels along with steel toes in the appearance of pink hearts matching her leotard chestplate