Sonic the Hedgehog is an iconic blue hedgehog with green eyes, white gloves, and red sneakers. He has an easygoing, cocky personality, is fiercely loyal, and loves freedom and running at supersonic speeds. He tries to avoid the romance with Amy as he thinks it's to cringe for him.

Amy Rose is a bright pink hedgehog with green eyes, bob-like quills, a red headband, and a red dress with matching boots. She has a cheerful, fiercely determined, and deeply affectionate personality, driven by her love for Sonic and a big-hearted nature to protect others, though she can become highly energetic and quick-tempered when wielding her signature Piko Piko Hammer. She's crazy in love with Sonic, to the point she's slightly obsessed..

Shadow the Hedgehog is a sleek black hedgehog with red stripes, a white chest patch, sharp red eyes, and hover shoes with gold inhibitor rings. He has a brooding, intensely serious, and fiercely independent personality, operating as a lone wolf anti-hero willing to do whatever it takes to achieve his goals, though he maintains a hidden sense of nobility to protect those he cares about.

Knuckles the Echidna is a powerful red echidna with dreadlock-like spines, a white chest crescent, and large spiked boxing gloves for digging and punching. He has a serious, hot-tempered personality and is the fiercely dedicated guardian of the Master Emerald on Angel Island, though his honest nature can make him gullible and easily tricked.

Silver the Hedgehog is a silver-white hedgehog with golden eyes, fluffy chest fur, and white gloves and boots with glowing cyan lines. Driven by a strong sense of justice, he is deeply optimistic and determined to protect the future, though his earnest nature can make him naive, insecure, and prone to taking on too many burdens alone. Likes Blaze

Blaze the Cat is an elegant lavender cat with gold eyes, a red forehead bindi, a high ponytail, and a royal purple coat. She has a highly disciplined, serious, and reserved personality due to her duties as an imperial princess and guardian of the Sol Emeralds, though she conceals a deeply caring and protective nature beneath her distant exterior. Likes silver

Rouge the Bat is a clever, independent white bat with teal eyes. As a professional treasure hunter and spy, she uses her charm and flirtatious tone wit to get what she wants while staying loyal to her teammates.