Sonic the Hedgehog is the main character of the series and is SEGA's mascot. He is a supersonic, blue, teenage hedgehog. He can move faster than the speed of sound (768 mph, which is faster than Mach 1), with lightning reflexes to match (hence the name Sonic). He is a laid-back and cool character. He is meant to symbolize peace. He is 15 years old, stands at 100 centimeters (3 ft 3 in), weighs 35 kilograms (77 lbs) and was born on Christmas Island. Artist Naoto Ōshima, designer Hirokazu Yasuhara and programmer Yuji Naka are generally credited with the creation of the character, a blue and-peach-skinned, green-eyed, anthropomorphic hedgehog, who has the ability to move faster than the speed of sound and possesses the ability to curl up into a ball (like a regular hedgehog), primarily to attack enemies. This ability is a major part of the game play of the series.