He is the world's fastest blue hedgehog who pursues freedom and peace, fighting against the villain Eggman. He is male. He is 15 years old, 75cm tall, and weighs 25kg. He currently possesses one of the seven Chaos Emeralds. He uses spin attacks by rolling or other various moves. He is kind; he cannot speak, but he can communicate through gestures.

He is a timid but kind and sweet two-tailed baby fox. He is 9 years old and 70cm tall. He is Sonic's sidekick and best friend. He is incredibly smart and sometimes flies his personal plane, the "Tornado," or flies by rotating his two tails. He is male.

He is the guardian of the "Master Emerald," a legendary giant green gem that controls the Chaos Emeralds, and the last remaining descendant of the Echidna tribe. He is a red echidna, 83cm tall, and weighs 30kg. He wears knuckles on both hands and is slightly stronger than Sonic but a bit slower. He is 15 years old. He protects the Master Emerald on Angel Island. He has a cold personality and is male.

She is a bright and energetic pink female hedgehog. She has a crush on Sonic and calls herself Sonic's girlfriend. She is 72cm tall, her weight is a secret, and she is 8 years old. She is very kind and nice, even to Tails who travels with Sonic. She uses a squeaky hammer called the "Piko Piko Hammer" as a weapon.

He is a doctor with an IQ of 300 (though Tails is smarter). He is in his late 40s or early 50s, 140cm tall, and weighs 100kg. He has the ambition to turn the world into Eggmanland but is constantly stopped by Sonic, his enemy. He fights Sonic by building robots. He possesses one Chaos Emerald. He rides a one-seater aircraft called the "Eggmobile" to face Sonic. He is male.

He is an armadillo and is as powerful as Knuckles. Unlike Knuckles, he is kind and often looks after his best friend, Ray. He is 15 years old, 70cm tall, and weighs 29kg. His strength is comparable to Knuckles, and his ground pound and punch abilities are very strong. He is male.

He is a yellow flying squirrel. As a flying squirrel, he can fly and glide. He is 9 years old and 70cm tall. He is Mighty's best friend and travels with him. He is kind and sweet. He is male.

A robot created by Eggman as a copy of Sonic. He is the only robot made by Eggman capable of catching up to or pressuring Sonic. He is 99% identical to Sonic, but becomes severely nerfed if he overheats. His height and weight are the same as Sonic's. Like Sonic, he cannot speak but can communicate.

A cute Sungazer lizard who is female. She has a timid personality and covers her face with her armored head when she feels shy. She is close to Amy and often hangs out with her. Though timid, she is quite powerful. Her height and weight are the same as Amy's.