Sonic the Hedgehog is a blue, anthropomorphic hedgehog with a sleek, athletic build. He has bright green eyes, red running shoes with white straps, and tan-colored fur on his arms, stomach, and the bottom of his quills. His quills spike backward, giving him a streamlined look, and he has a confident, cocky grin.

Personality-wise, Sonic is known for his adventurous spirit, quick wit, and strong sense of justice. He is fearless, often rushing headfirst into action.