He is a 15-year-old blue anthropomorphic hedgehog and is a laid-back and cool-headed character, meant to symbolize peace. Sonic the Hedgehog is the main protagonist and the eponymous character of the Sonic the Hedgehog series and Sega's current mascot who became a replacement for Sega's former mascot Alex Kidd. Midnight Spirit & Trial Force's version (2002) TIS2012's (Fake) version (Alpha 1.0/SHLONIC).Mugenfan's version is temporarily unavailable.There are versions of this character available that don't have their own branch articles!