Sonic is an anthropomorphic blue hedgehog with six long head quills that droop backward. He features peach skin on his muzzle, arms, and torso chest. He has large green eyes and two small quills on his back. His signature attire includes a pair of white gloves with sock like cuffs and lightweight, hyper friction resistant red sneakers adorned with a prominent white strap and gold buckles. He is built for extreme speed, displaying an athletic and aerodynamic silhouette at all times.

Tails is a young, anthropomorphic fox predominantly covered in amber yellow fur, with white fur highlighting his muzzle, chest, torso, and tail tips. His most defining physical trait is his twin fluffy tails, which he can spin like helicopter rotors. He features large blue eyes, triangular ears, and small tufts of hair on his forehead. He wears white gloves and red and white sneakers. His overall design is shorter and rounder than Sonic, emphasizing his younger age and mechanical genius

Knuckles is a robust, red-furred anthropomorphic echidna with long, dreadlock like spines hanging down his head. He features a distinctive white crescent shaped patch on his chest. His muzzle is peach colored, and his eyes are violet. His trademark apparel consists of large, heavy duty white boxing gloves fitted with two sharp spikes on each fist, paired with red, yellow, and green boots with metal plates. He has a powerful, broad supported physique tailored for intense physical combat.

Amy is an anthropomorphic pink hedgehog with a short bob cut hairstyle of flattened quills. She features a peach colored muzzle and bright green eyes. Her iconic wardrobe consists of a bright red sleeveless dress with a white collar and trimming, a matching red headband, white gloves with gold wrist cuffs, and tall red boots featuring a white stripe down the center. Her bright color scheme and cheerful, expressive design emphasize her optimistic, passionate personality and high energy.

Rouge is an anthropomorphic bat with white fur, large bat ears, and purple tinted wings on her back. She features a tan muzzle and striking teal eyes adorned with blue eyeshadow. Her distinct outfit includes a black, form fitting strapless jumpsuit featuring a prominent pink, heart shaped chest plate, paired with white elbow length gloves and white high heeled boots with pink hearts on the toes. She possesses a sleek, feminine, and sophisticated design matching her secret agent persona.

Blaze is a slender, lavender furred anthropomorphic cat with violet eyes and a small red jewel like gem on her forehead. Her hair is tied back into a high ponytail with a fluffy purple band. She wears a long, elegant royal purple coat lined with magenta trimming and a high white collar. Her outfit is completed with white tights, white gloves with fuzzy pink cuffs, and high heeled magenta shoes. Her royal posture and sharp features convey an air of calm elegance and fiery, stoic discipline.

Silver is an anthropomorphic hedgehog with light silver gray fur and a distinctively massive, fan like arrangement of five upright quills on his forehead. He has two large quills on his back, a short tail, and gold eyes. He wears white and navy gloves featuring glowing cyan circular symbols on the palms, paired with high tech boots featuring identical cyan accents. He has a fluffy white fur collar around his neck, giving his futuristic appearance a soft, distinctive silhouette in battle.

Pace is a small, timid hedgehog with light lavender blue fur and a round, spherical body shape reminiscent of Classic Sonic. His muzzle, inner ears, arms, and belly feature a very light, faded purple ish skin tone. He has distinct, asymmetrical eyes that frequently open wide with a terrified expression. A small tuft of hair (an ahoge) sticks out on his head. He wears white folded gloves and red purple shoes styled with white cuffs and front white studs. His friends Brains and Brawn look similar to Tails and Knuckles, leading him to think they are his friends.