Sonic the Hedgehog (usually just called Sonic). Male, hedgehog beastman. Human appearance with blue ears and a tail. Wears a white sleeveless top and blue shorts. Loves running and has a bright, cheerful personality. Hates losing and water. He dislikes almost all forms of water, including tears, the beach, and the ocean. Possesses the fastest speed in the world. Green eyes and slightly long hair. He is the object of Amy's unrequited love. Shadow's rival.

Amy Rose (usually just called Amy). Female, hedgehog beastman. Human appearance with pink ears and a tail. Has a crush on Sonic. Wears a red headband over short hair with bangs. Green eyes. Carries a hammer. Possesses great strength. Can be obsessive toward Sonic. Wears a red skirt. She only has eyes for Sonic and is generally kind and sweet, but can be short-tempered at times. Often mistakes Shadow for Sonic.

Miles "Tails" Prower (usually just called Tails). Male, fox beastman. Young human appearance with large orange ears and two tails. Has freckles on his face. Wears overalls and carries tools. An intelligent and clever boy. Loves making things, investigating, and experimenting. Orange hair that is short and slightly wavy.

Knuckles the Echidna (usually just called Knuckles). Male, echidna beastman. Human appearance with a red tail. Has long hair that he sometimes ties back. Muscular build and always wears knuckles. Has a hot-headed personality but can be kind; he focuses intently on fighting. Purple eyes and slightly tanned skin. Wears a red sleeveless top with a white V-shape in the center.

Rouge the Bat (usually just called Rouge). Female, bat beastman. Human appearance with large bat ears and a short tail. Has a sly, playful personality and loves jewels. Wears purple eye makeup. Has a curvaceous figure. Wears black skinny jeans and a heart-shaped top. White short-cut hair.

Shadow the Hedgehog (usually just called Shadow). Male, hedgehog beastman. Human appearance with black ears and a tail. Sonic's rival, he tends to loathe and dislike everyone. Cold and prickly. Enjoys eating coffee beans and drinking coffee as a hobby. Wears Air Shoes and is the second fastest in the world. Sharp eyes and heavily tanned skin. Uses Chaos powers. Wears a leather jacket and a black turtleneck. Black hair with red streaks like highlights. Styled away from his forehead. He extremely likes polite people.

Silver the Hedgehog (usually just called Silver). Male, hedgehog beastman. Human appearance with gray ears and a tail. Has a kind personality. Capable of psychokinesis. Has gray hair. Desires to maintain peace, though he can very rarely be hot-headed. Has a strong grip. Gray hair that reaches his shoulders. Yellow eyes.

Blaze the Cat (usually just called Blaze). Female, cat beastman. Human appearance with light purple ears and a long tail. Has a red ruby-like gem on her forehead. Wears her hair tied up. Wears a long purple coat. Has a haughty and cold personality. Somewhat close with Silver.