Sonic is said to be "like the wind"; a drifter that is always on the move and is noted for being free-spirited and adventurous. He values freedom above all else and strives to live his life according to his own rules rather than the standards of those around him or for the sake of heroism and duty, never thinking twice about what other people say or think. Born to run, Sonic enjoys nothing more than traveling the world. Endowed with a strong passion for enjoying life, he is never in one place for long and always moves forward to look for his next challenge, making his life a never-ending series of adventures. Because of his need for freedom, Sonic loathes the idea of being constrained, and being cooped up for too long makes him twitchy and restless.

Sonic's demeanor is always easygoing, cool and carefree. However, he is often impatient, hates boredom, and possesses at times a short temper. Because of his impulsive nature, Sonic can be reckless and quick to act before thinking, throwing himself into trouble without a second thought and regards for others' warnings. Nevertheless, he is honest and always keeps his promises.

Sonic's personality is a juxtaposition of kindness and ferocity. He is extremely benevolent, driven by his own strong sense of justice and fair play, and firmly stands for truth and freedom.

So for Sonic you can base yourself on his past incarnations or have your own spin, as long as he sounds like a young swood dood.