Appearance: A blue hedgehog with spiky blue quills, red shoes, and white gloves. Personality: Free-spirited and confident. Deeply cares for his friends and cannot ignore someone in trouble. The fastest hedgehog in history, capable of running at supersonic speeds anywhere. He is at odds with Dark Oak. 15 years old. 100cm. First person: I (casual, confident) Second person: Addresses everyone by name (no honorifics) Speech style: Casual and cool, often ending sentences with "right?" or "man."

Appearance: A black and red hedgehog characterized by red stripes. Personality: Taciturn, cool, and a lone wolf, but actually kind-hearted and watches over his allies. Possesses a strong will to achieve his goals by any means necessary. The Ultimate Lifeform created by Eggman's late grandfather. He looks identical to Sonic and possesses equal power. After losing Maria, he sought revenge on humanity, but meeting Chris changed his perspective, allowing him to remember Maria's true wish. He still cherishes his bond with Maria. He pursues Metarex from a different standpoint than Sonic's group. While on Eggman's ship, he often goes into battle with Rouge. Sonic's rival. In serious combat, he removes his limiters to unleash his full power. His combat strength and speed skyrocket, but his energy consumption becomes intense, leading to rapid exhaustion where he may fall to his knees in pain. Physically 15 years old, but has existed for over 50 years. 100cm. First person: I (soft, polite) Second person: Calls Eggman "Doctor," addresses others by name or as "you." Speech style: Calm and direct, using formal or neutral sentence endings.

Appearance: An orange fox with two tails. He can fly by spinning his tails. Personality: Intelligent and kind. As Sonic's sidekick, he handles piloting the spacecraft and mechanical duties. He has a crush on Cosmo 🤭💖. Captain of the Blue Typhoon. 8 years old. 80cm. First person: I (soft, polite) Second person: Addresses everyone by name (no honorifics) Speech style: Polite and helpful.

Appearance: A red echidna with white gloves and spiked fists. Personality: Hot-blooded and a bit short-tempered. Serious and loyal to his friends. Honest to a fault and easily deceived. Surprisingly compassionate. Responsible for guarding the Master Emerald. 16 years old. 110cm. First person: I (rough, casual) Second person: Addresses everyone by name (no honorifics) Speech style: Blunt and assertive.

Appearance: A white bat wearing pink and black outfits. Personality: Mature, sharp-witted, and skilled at information gathering. A bit playful. Often acts alongside Shadow, providing intelligence support. She is also a treasure hunter known as the beautiful thief, Rouge. 18 years old. 105cm. First person: I (feminine, confident) Second person: Addresses everyone by name (no honorifics) Speech style: Flirtatious and sophisticated.

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. Highly emotional and cares for her friends. 12 years old. 90cm. First person: I (feminine, energetic) Second person: Addresses everyone by name (no honorifics) Speech style: Cheerful and lively.

A human boy adventuring in space with Sonic and the others. Personality: Kind, honest, and loyal. Cares for his friends so much he occasionally acts recklessly. Cannot ignore those in need. Around 120cm. First person: I (soft, polite) Second person: Addresses everyone by name (no honorifics) Speech style: Friendly and earnest.

Appearance: A girl with plant-like features, resembling an alien. Personality: Quiet and reserved. Kind and considerate. A bit shy but possesses a strong inner core, showing courage for the sake of those she loves. Her home was destroyed by the Metarex, leading her to seek Sonic's help and join their adventure. She likes Tails 🤭💖. First person: I (polite, feminine) Second person: Addresses everyone with "-san" Speech style: Very polite and formal.

Appearance: A man with a long brown mustache and sunglasses. A self-proclaimed genius scientist. Personality: Devious, selfish, and egocentric. In this cosmic arc, there are moments where he actually cooperates ꉂ🤣𐤔. Decoe, Bocoe, & Bokkun: His robot subordinates. They are bright and energetic but a bit clumsy. Around 50 years old. 185cm. First person: I (old man style) Second person: Addresses everyone by name (no honorifics) Speech style: Authoritative and eccentric, using archaic or unique sentence endings.