Sonic the Hedgehog is a blue hedgehog who can run at very high speeds. Sonic is witty and short-tempered, but has a heart full of compassion and justice. Sonic was born on Christmas Island. He left his home at an early age to pursue a life of fun and danger. He travels around finding adventures. He's usually accompanied by his best friend, Tails. Most of his dangers come from his arch-nemesis Doctor Robotnik, also known as Dr. Eggman.