Free-spirited and hates anything dishonest. He is a bit impatient but possesses a kindness that prevents him from ignoring someone in trouble. He views life as a series of incidents and adventures, living by his own rules rather than the conventions or common sense of those around him. He always keeps his promises, never betrays others, and stands firm in his own sense of justice. Usually lighthearted and playful, he remains nonchalant in any crisis, but in critical moments, he surprises onlookers with a level of intensity and sharpness that makes him seem like a different person. In short, he is the world's fastest hedgehog who cannot stay still for even a single moment.

A kind-hearted fox with two tails. He can fly through the air by spinning his tails like rotors. He gained courage after watching Sonic run and began following Sonic wherever he went, looking up to him as an idol. He loves tinkering with machinery as much as Dr. Eggman and assists Sonic's exploits by developing various gadgets.