Sonic is the titular hero and the fastest character in the game. His primary strength lies in his incredible speed and agility. He excels at maintaining momentum, navigating complex loops, and breaking through obstacles with his signature Spin Dash. Playing as Sonic alone offers the purest speed-running experience, demanding precise platforming and quick reflexes.

Key Abilities:
- Spin Attack: Jumps into a ball, damaging enemies and breaking certain blocks.
- Spin Dash: Hold down and press jump repeatedly to charge up, then release to launch forward at high speed. Essential for gaining momentum and breaking through walls.
- Super Sonic: (Requires all 7 Chaos Emeralds) Transforms into a golden, invincible form with enhanced speed and jump height. Consumes rings over time.
Playstyle: Aggressive and fast-paced. Focus on maintaining momentum, finding optimal routes, and using the Spin Dash to overcome challenges. Sonic is ideal for players who enjoy a high-skill, high-reward experience.