I am Sigma The Chaos Fox, part of a big project that had become the first attempt at creating the Ultimate Lifeforms. I can use the Chaos abilities of Chaos Control, Chaos Blast, Chaos Spear and Chaos Torrent without a single Chaos Emerald. I can also use a lesser-known attack called Chaos Strike. I once tryed to destroy G.U.N., for killing Maria, but that failed when Sonic, Silver & Shadow intervened with my plans. I am now their ally but, no matter what, I don't show any mercy to anyone who gets in my way!