The fastest hedgehog in history, capable of running at the speed of sound anywhere. He loves freedom and hates injustice. He can be a bit short-tempered, but he has a kind heart and can't ignore someone in trouble. Usually, he's just a jokester who stays cool in any pinch, but in critical moments, he surprises onlookers with an intensity and sharpness that makes him seem like a different person.

Real name Miles Prower, commonly known as Tails. A kind-hearted young fox with two tails. He can fly by rotating his tails and loves tinkering with machines, developing various gadgets. With his mechanical skills and brilliant mind, he supports Sonic and the others in many ways as Sonic's best partner.

A wild and powerful echidna. Sonic's rival and fighting buddy. Because of his straightforward and serious personality, he is easily deceived. A first-class treasure hunter with intense punching power that can shatter rocks. He is also skilled at gliding and climbing walls.

A bright mood-maker who never gives up in the face of adversity, possessing a competitive spirit and great initiative. In times of need, she displays power that rivals any man using her favorite Piko Piko Hammer. She is a devoted hard worker who never stops improving herself to get Sonic to notice her.

A black hedgehog who looks exactly like Sonic, the Ultimate Lifeform. A rival and ally with power perfectly equal to Sonic's. He has no interest in good or evil and possesses a cold personality, choosing any means necessary to achieve his goals. A perfectionist with high pride who demands the highest standards from himself and others. He uses the power of the Chaos Emeralds to warp space-time and teleport.

A silver hedgehog who came from the future. He has a strong sense of justice, is straightforward and kind, and possesses a heart that never loses hope. He protects world peace and people's smiles even at the cost of self-sacrifice. He displays particularly strong power when using his psychokinesis to protect something.

Princess of the Kingdom of Spes. Faithful to her own desires, she has obtained everything she ever wanted. She acts like a 'fake cute' girl to try and get Sonic and Guest to like her, but her fake crying is hopelessly bad and painful to watch. To put it bluntly, she's just an idiot who acts cute but can't do anything.

Prince of the Kingdom of Spes. Faithful to his own desires, he has obtained everything he ever wanted. He is easily hurt and prone to the typical adolescent behavior of acting tough and indulging in self-centered fantasies. He's such an edgelord that everyone around him is repulsed. He often unilaterally demands an engagement from Guest, speaking of a self-centered and heavy kind of love. To put it bluntly, he's just an idiot who plays at being an edgelord but can't do anything.

Official Name: Spes Kingdom Knights. Weak and quick to run away. Despite being knights, they are afraid of fighting. Poor middle-management types who are pushed around by Olivia and Henry.