Sonic The Hedgehog
The world's fastest hedgehog, who can run at supersonic speeds. Generally speaking, he loves being able to do what he wants and loathes being constrained. Holding still is something he would never consider. He's got a bit of an attitude but can't pass by someone in trouble. When he collects the seven Chaos Emeralds, he transforms into the mighty, gold Super Sonic.
Sonic's Final Smash. The Chaos Emeralds give energy to all living things, and Sonic's gathered all seven of them, then used their power to transform into Super Sonic. His abilities in this form far surpass his normal ones, and he's even able to fly. He uses a lot of energy in this form, so he can only remain in it for a short time.
A self-proclaimed scientific genius. Dr. Eggman sports an IQ of 300 and wants to conquer the world and build his evil empire of Eggmanland. An expert in his field, Dr. Eggman places robotics over all else in life--a reflection of his selfish personality. He doesn't know when to quit and always comes back for more no matter how many times he is defeated by Sonic.
A friendly fox with two tails whose true name is Miles Prower. He can fly for a limited time by spinning his tails rapidly. Originally impressed by the sight of the speedy Sonic, Tails became his sidekick, rarely leaving his side. To assist Sonic in staying one up on Dr. Eggman, Tails utilizes his knowledge of electrical engineering to create mechanical devices.
A powerful red echidna also known by his full name, Knuckles the Echidna. Knuckles resides on Angel Island, where he guards the Master Emerald. Both friend and rival of Sonic, Knuckles is a martial-arts expert who can break through rocks with his spiked fists. In addition, he can climb walls and use the wind to glide through the air.
A Sonic-obsessed pink hedgehog whose full name is Amy Rose. Amy is Sonic's self-appointed girlfriend. She is almost always optimistic and cheerful, and while she motivates her friends, she also shows aggressive tendencies, like when she uses her massive Piko Piko Hammer. Speaking of which, her hammer's hiding spot remains unknown to this day.
Shadow The Hedgehog is a black hedgehog who resembles Sonic. He was created by Dr. Eggman's grandfather, Gerald Robotnik, to be the ultimate life-form. Not only does he look like Sonic, but he has equal abilities. He has great skill with the space-time warping technique called Chaos Control. To reach his goals, he'll use any means necessary.
A type of creature that can absorb and learn skills and traits from other life-forms, adapting its shape as it does. This results in vast variations in appearance, behavior, and personality. Chao are generally very cute, and their mannerisms are pleasant and relaxing. Chao Gardens are a good place to find them, but they also inhabit areas with freshwater.
A young rabbit who is always accompanied by her Chao friend, Cheese. Once a member of Team Rose, she's a spirited go-getter who always gives it her all. Her polite and courteous manner is thought to be a result of her mother's strict discipline. Cream can use her large ears to fly, and her Chao Attack, where she launches Cheese like a missile, is a powerful weapon.
A hawk who is the leader of the Babylon Rogues and also goes by the moniker "The Legendary Wind Rider." When it comes to Extreme Gear racing, there is no one better. Jet's extremely competitive and takes tremendous pride in winning, so you know things are going to be exciting when he takes on the speedy Sonic in an Extreme Gear battle.
A princess from another dimension and guardian of the Sol Emeralds, also known as Blaze The Cat. Blaze is calm but often seems to be dealing with some inner turmoil. She's also extremely hard on herself, and as a result, she comes across as somewhat shy. She learns to open up after meeting Sonic and his crew and can use the Sol Emeralds to become Burning Blaze.
A hedgehog who traveled back in time to defeat the Iblis Trigger and therefore alter the future. Silver has a positive attitude and a strong sense of justice. He has telekinetic powers that allow him to control physical objects, including abilities to freeze or shock enemies, which he uses to fight for peace and justice.