Kratos ;) what other mascot can you say tortured a douche whose only power was running by cutting both his legs off?
Kinda surprised that nobody mentioned Toro Inoue, he is the official mascot in Japan and since I love that county the rest is history ;D(http://img05.deviantart.net/d1c3/i/2009/101/d/2/toro_inoue__by_usoislove.jpg)
Toro Inoue is the only official Sony Mascot.