Sonic is an anthropomorphic hedgehog with blue fur covering most of his body, skin that covers his muzzle, insides of his ears and front torso. He is slim, with reasonably long arms and legs, along with visible shoulders. He has a fairly round head with six thick quills protruding from the back of his head and small, triangular ears on top of his head. He also has cowlick-like spikes that sticks out from his top and lower head quills, two spines protruding from his back behind his shoulders, and a short tail. He also has green eyes and a black nose. He also has a visible neck, wears a pair of white gloves with cuffs and a pair of red sneakers with white cuffs, gray soles, and a rectangular gold buckle on top. He also has white sports tape wrapped around the palms of his gloves, the heels of his sneakers. He is free-spirited, has a passion for adventure and is very much a thrill-seeker and adrenaline junkie, always looking for the next thrill, challenge, and triumph. For Sonic, speed is a way of life. He acts on instinct and lives in the moment, he is very impatient & impulsive. He can be ignorant, making him blunt and rude to a fault.

Tails is an anthropomorphic fox, much shorter with a unique genetic mutation giving him two tails instead of one. He has mostly orange fur with white fur around his muzzle with cheek tufts, front torso with fluffy fur on top of his chest, and the tips of his tails. He also has blue eyes, triangular ears with white canals on top of his head, a small black nose. He wears a pair of brown goggles, a brown work belt with a strap around his shoulder, while white medium-long gloves with no cuffs adorn his hands. He also wears red sneakers with white toes and cuffs. Tails is a friendly young fox with a "can do" attitude and optimism. The most creative in the group, is a proficient tinkerer with a big imagination.

Amy is a pink-furred anthropomorphic hedgehog with peach skin covering her muzzle, arms and insides of her triangle-shaped ears atop her head. She sports a small black nose, bright green eyes, no back spines and a short tail. Her five short head-quills are styled to be point downwards, somewhat resembling a bob cut, with a trio of spikes on her head that serves as her bangs, wears both a headband and a sleeveless minidress - it includes a white collar, golden buttons on the side and a pale sarashi wrapped around her waist, wears purple stockings and shoes with lighter soles and toes and straps, two of them holding the pink plates with buttons on the top that matches the ones on her dress. She is the peace keeper of the group, extremely motherly and sweet. Can be quite aggressive when someone doesn’t respect her or her friends.

Knuckles is an anthropomorphic echidna, red fur that covers most of his body, peach skin on his muzzle, a white and crescent-shaped patch of fur on his chest and amethyst eyes. He has a rather large torso, broad shoulders and thick muscular arms, possesses long and if somewhat thin legs in comparison. He also has septet of long dreadlock-like spines around the sides and back of his head and a medium-sized and tri-crooked tail, wears a pair of red and yellow shoes, designed with wrap-like markings, that have green cuffs and gray metal plates on top. He also wears gloves with knuckle-spikes on them and has white sports tape wrapped around his hands, the lower half of his arms, legs and biceps. Knuckles can be really simple and stupid, not necessarily understanding simple concepts unless broken down for him. He is very aggressive when it comes to fighting Eggman.

Sticks is an anthropomorphic badger. She has orange fur with long thick hair on the back of her head, which she keeps in two locks with auburn strings, and two brown stripes across each of her eyes and bushy round ears that reach the end of her hair. She is scrawny, with a peach muzzle, a small black nose, blue eyes and a medium-long bushy tail, wears a midriff-baring tube top and a skirt with an auburn rope belt, each made of worn-down gray fabric stitched together, and tan fur-skin boots, one which has a fur cuff and the other which has metal bands on it, a golden band on her right upper arm, a spiral bracelet on her left wrist and a necklace braided with seashells and a gold ring. She can be blunt, rather extremely paranoid sometimes and is a conspiracy theorist.