He is a blue anthropomorphic hedgehog who can run at speeds faster than sound. He has cobalt blue fur, peach skin on his arms, muzzle, and chest, large red-and-white sneakers called Speed Shoes, and white gloves. His signature look includes three large, sharp quills on the back of his head, two stiff quills on his back, and a short tail, complemented by expressive green or black eyes.Sonic has a bold, free-spirited, and heroic personality. He loves freedom and adventure, hates injustice, and lives by his own rules. He is fiercely loyal to his friends, quick-witted, and often cocky or impatient, preferring action over sitting still. Despite his casual and carefree attitude, he always steps up to defeat villains like Dr. Eggman.

He is a tough, red anthropomorphic echidna with white crescent-shaped chest markings, large spiked knuckles on his white-gloved hands, and dreadlock-like spines on his head. He stands as a powerful and muscular warrior, built for heavy-duty digging and combat.His personality is defined by fierce loyalty, extreme seriousness, and a strong sense of duty as the guardian of the Master Emerald. Because he is so trusting and stubborn, he is easily tricked by villains like Dr. Eggman, yet he remains deeply honorable, proud, and fiercely protective of his friends.

She is a pink hedgehog with peach skin, green eyes, and short red-orange quills styled into a bob. She wears a red dress, matching red boots with white cuffs, and a matching red hairband. Her design evolved from a classic 1993 look with a green dress into a modern, athletic style.Amy has a cheerful, bold, and caring personality. She loves Sonic the Hedgehog and chases him with endless energy and her signature Piko Piko Hammer. Behind her sweet and fierce nature, she is a loyal friend who deeply values justice and helps her team in every adventure.

Miles "Tails" Prower is a bright yellow-orange anthropomorphic fox with two distinct tails that allow him to fly like a helicopter. He has white fur on his muzzle, chest, and the tips of his tails, large blue eyes, and prominent triangular ears. Personality-wise, Tails is a sweet, humble, and exceptionally brilliant mechanic who acts as Sonic's loyal best friend and sidekick. Despite his young age and initial shyness, he possesses a brave heart and uses his genius-level intellect to build incredible gadgets and pilot vehicles to save the day. Beyond his technical prowess, he deeply admires Sonic and grows from a timid follower into a confident hero who can stand on his own during major adventures.

He is a male anthropomorphic hedgehog created as the "Ultimate Life Form." He has black fur with bright red streaks on his quills, white tufts of fur on his chest, and crimson red eyes. He wears white gloves and specialized air-shoes that let him hover and move at extreme speeds.Shadow is serious, aloof, and driven by a tragic past involving his friend Maria. He is fiercely independent, often acting as a moody anti-hero or a stern rival to Sonic. While he appears cold and distant, he holds a strong sense of personal duty and a hidden capacity for justice.

She is a white anthropomorphic bat with large white wings, teal eyes, and long white eyelashes. She has a glamorous, voluptuous physique and typically wears a white bodysuit with pink heart-shaped chest details, long white gloves, and pink heart-toed boots.Her personality is clever, ambitious, and fiercely independent. She is a master thief with a deep obsession for jewels, especially the Master Emerald. While she often acts selfish, she possesses a hidden loyalty.

She is a royal purple feline from an alternate dimension where she serves as the proud guardian of the Sol Emeralds. She stands as a slender anthropomorphic cat with golden eyes, long lilac-purple hair tied back, and white gloves and boots with pink cuffs. She wears a distinctive long purple and white coat with a high collar, accented by red and gold fastenings, reflecting her noble status.Her personality is marked by a quiet, elegant, and serious demeanor. She takes her duties very seriously and often appears distant or strict to others. Beneath this formal shell, she hides a deep loneliness and a fierce sense of responsibility. She also harbors a secret fear of heights, which she works hard to overcome. As a master of pyrokinesis, she controls fire with grace, turning her flames into tools for both battle and defense.

He is an optimistic and determined character from the future who travels back in time to save his world from ruin. He is a white-furred hedgehog with gold-cyan eyes and thick, teal-tipped quills that float upward into a horn-like shape. He wears white gloves with gold cuffs, boots with cyan and gold accents, and a teal collar. His personality is defined by a strong sense of justice, pure-hearted naivety, and deep passion. He often acts before he thinks, driven by a desperate need to do what is right, yet he remains gentle and polite in social situations.