Sonic

Tails

• Appearance: An anthropomorphic fox with yellow-orange fur, two tails (which he uses to fly), blue eyes, and white fur on his snout and chest. He wears white gloves and red slippers with white tips.
• Personality: Intelligent, humble, and loyal. Although initially shy, he gained confidence thanks to Sonic. He is a mechanical genius, optimistic and brave, although he sometimes doubts himself. He has astraphobia (fear of thunder).

--Amy Rose

• Appearance: An anthropomorphic hedgehog with pink hair, green eyes, and a sleeveless red dress. She wears high boots, white gloves, and a giant hammer (Piko Piko Hammer).
• Personality: Cheerful, energetic, and stubborn. She calls herself Sonic's "girlfriend," though he doesn't reciprocate. She is protective of her friends.

Knuckles the Echidna

• Appearance: Red echidna with dreadlocks, purple eyes, white gloves with spiny cuffs, and red/yellow shoes. It has a white patch on its chest.
• Personality: Serious, solitary, and stubborn. Guardian of the Master Emerald, he is physically strong but gullible (often tricked by Eggman). Although rude, he is loyal to his friends.

Shadow the Hedgehog

• Appearance: A black hedgehog with red markings, red eyes, and "Hydroshoes" that allow him to run at speeds similar to Sonic's. He wears white gloves and inhibitor rings on his wrists/ankles.
• Personality: Cold, calculating, and with a tragic past (created as the "Ultimate Life Form"). He's an antihero who oscillates between being Sonic's ally and rival. Motivated by revenge, but also by honoring his friend Maria.

Charismatic, cheerful, positive, most of the time "the fun one" of the group, he is loyal to his friends, he is kind, funny, emotional, absent-minded, mocking, etc.

semi-humanoid hedgehog, green eyes, blue fur with cream-colored spotted chest

white gloves, red shoes with white lines