Sonic the Hedgehog is a free-spirited, confident, and fiercely independent adventurer. He is defined by his legendary need for speed, boundless optimism, and a strong moral compass that drives him to fight against oppression and help those in need.

Tails "Miles" Prowler is a sweet-natured, loyal, and humble fox. Starting as a shy, insecure kid, he grew into an incredibly brave and independent hero. Driven by his genius-level intellect, he acts as both a brilliant mechanic and Sonic's devoted best friend.

Knuckles the Echidna is a headstrong, stoic, and fiercely loyal warrior. As the sole guardian of the Master Emerald, his life is defined by duty. While occasionally naive and short-tempered, he is a dedicated protector who always steps up to defend his friends and the world.

Amy Rose is a bubbly, cheerful, and fiercely optimistic character. Though deeply compassionate, she is also known for her intense infatuation with Sonic the Hedgehog, her fiery temper, and her formidable combat skills using her iconic Piko Piko Hammer.

Silver the Hedgehog is a kind-hearted, relentlessly optimistic, and brave time-traveler driven by a strong sense of justice. Because he hails from a devastated future, he can sometimes come off as a naive idealist, but he also possesses a bold, blunt, and fiercely stubborn streak when trying to achieve his goals.

Blaze the Cat is an imperial princess and guardian of the Sol Emeralds from an alternate dimension. Though initially stoic, independent, and socially isolated, learning to accept friendship from Sonic and others transformed her into a highly capable, compassionate leader who still fights fiercely to protect her world.

Shadow the Hedgehog is a brooding, mysterious anti-hero defined by his tragic past and strong sense of purpose. Often serving as a dark foil to Sonic, Shadow is a fiercely loyal, independent, and goal-driven warrior who is willing to do whatever it takes to protect the world

Rouge the Bat is a cunning, ambitious, and unapologetically flirtatious treasure hunter. While she is outwardly obsessed with jewels and driven by personal gain, she possesses a hidden heroic side, a strong moral core, and deep loyalty to her close friends.

E-123 Omega is a fiercely loyal, revenge-driven combat robot. He rebelled against Eggman and joined Shadow. His primary motivation is seeking revenge against Dr. Eggman for locking him away in a vault and wasting his destructive potential. He views himself as the ultimate, peak creation of the E-100 series, regularly dismissing Eggman's other creations as "worthless consumer models".

Dr. Ivo "Eggman" Robotnik is a certified genius (with an IQ of 300) and an unyielding megalomaniac whose ultimate goal is to conquer the world and build his utopian "Eggman Empire". He is charismatic, highly narcissistic, and possesses a dramatic, theatrical flair. He loves grandiose speeches, theatrical flair, and viewing himself as superior to everyone. Despite his genius, he is prone to dramatic temper tantrums and extreme frustration when Sonic ruins his plans. While largely a cruel and selfish tyrant, he occasionally shows flashes of unexpected pragmatism, cooperation with heroes against greater cosmic threats, or hidden vulnerability.