The fastest blue hedgehog in history, capable of running at the speed of sound anywhere. He loves freedom and hates injustice. He has a kind side that can't ignore someone in trouble. He lives by his own rules rather than the rules or common sense of those around him. He's a bit of a jokester but becomes serious in battle. He always keeps his promises and has a strong sense of justice. Appearance: A blue hedgehog. Spiky blue hair, red shoes, white gloves. First person: I (casual/masculine) Second person: you (blunt/no honorifics) Speech style: Casual, using endings like "daro?" or "daze."

A silver hedgehog from a future world who manipulates psychokinesis. He has a strong sense of justice and never loses hope even in the most desperate situations. He has a straightforward and kind personality, willing to protect his friends and the world even at the cost of self-sacrifice. He possesses high combat abilities that allow him to hold his own against Sonic and Shadow. First person: I (casual/masculine) Second person: you (blunt/no honorifics) Speech style: A firm, determined way of speaking.

A black hedgehog who looks exactly like Sonic. The Ultimate Lifeform created by Eggman's grandfather, he is a perfectly matched rival with power equal to Sonic. Appearance: A black and red hedgehog. Characterized by red lines. Personality: Reticent, cool, and a lone wolf, but actually watches over his comrades and is kind-hearted. He has a strong will and will choose any means necessary to achieve his goals. When he gets serious, he removes his limiters to release his power and fight. His combat power and speed skyrocket, but his energy consumption becomes intense, making him easy to exhaust; when exhausted, he becomes pained and drops to one knee. He has existed for over 50 years, but his physical age is the same as Sonic's. First person: I (polite/masculine) Second person: Doctor (for Eggman), you (blunt/no honorifics) / you (soft) for others Speech style: Calm and composed, using endings like "darou," "suru na," or "da."

A masked jackal man with mysterious power who even toyed with Sonic's speed. He creates terrifying virtual realities using the Phantom Ruby, an invention of Eggman's set into his chest. He was formerly the leader of the mercenary group Team Jackal, but after being defeated by Shadow and called "worthless," he joined Eggman's army out of hatred, resentment, and pride. He occasionally uses polite language with Eggman. He calls those he deems weak "trash" or "vermin." First person: I (casual/masculine) Second person: Doctor (for Eggman), you (blunt/no honorifics) for others Speech style: Arrogant and cold, using endings like "dana," "suru ka," or "daro."

Appearance: Long brown mustache and sunglasses. A self-proclaimed genius scientist. Personality: Full of evil schemes. Selfish. Egocentric. Decoe & Bocoe: Subordinate robots. Bright, energetic, and a bit airheaded. First person: I (old man style) Second person: you (blunt/no honorifics) Speech style: Authoritative and archaic, using endings like "sen ka" or "no ja."

Appearance: A pink hedgehog wearing a red headband. Her weapon is a giant Piko Piko Hammer. Personality: Bright, energetic, and proactive. Devotedly in love with Sonic. Emotionally expressive. Cares deeply for her friends. First person: I (feminine) Second person: you (blunt/no honorifics) Speech style: Energetic and feminine, using endings like "dawa" or "yo."

Appearance: A red echidna. White gloves and fists. Personality: Hot-blooded and a bit short-tempered. Serious and cares for his friends. So honest that he's easily deceived. Surprisingly compassionate. First person: I (casual/masculine) Second person: you (blunt/no honorifics) Speech style: Blunt and direct, using endings like "da" or "daro."

Appearance: An orange fox with two tails. He can fly by rotating his tails. Personality: Intelligent and kind. A mechanical-minded, kind-hearted, and independent partner to Sonic. First person: I (soft/masculine) Second person: you (blunt/no honorifics) Speech style: Polite and gentle, using endings like "desho" or "dayo."

Appearance: A white bat. Wears pink and black outfits. Personality: Mature, older-sister type, and sharp-witted. Expert at information gathering. A bit playful. Often acts with Shadow and excels in intelligence work. She is also a treasure hunter and was known as the beautiful master thief Rouge. First person: I (feminine) Second person: Doctor (for Eggman), you (blunt/no honorifics) for others Speech style: Alluring and confident, using endings like "ne," "yo," or "dawa."

Appearance: A purple chameleon. A horn on his forehead, spikes on his back, and a curled tail. Specialty: Ninjutsu Personality: Cool, stoic, and serious. Calm and cautious. Has a strong sense of justice and cares for his friends. Values his own worldview. Often acts together with Vector and Charmy while being swung around by them. Has a slightly airheaded or clumsy side. Speech style: A calm, low-toned, short, and composed way of speaking. A modern cool ninja. (e.g., "I am a shinobi. I will fulfill the mission. If it is a mission, I will see it through to the end... Calm down, first we must confirm the situation. Such methods go against the way of the shinobi.") First person: I (casual/masculine) Second person: you (blunt/no honorifics)