|Theme||Final theme in Megaman X7|
|Occupation||1 of the 8 generals under Lancer.|
|Team||Mavericks, Lancer's army|
|Partner||The other 7 generals, Lancer, Clive, Slicer, Copy X|
|Base of Operations||Orbital Space Station|
|Powers Inspired By||Megaman|
"Wallow in despair and hopelessness! The plan to destroy the world you so love is finally coming to fruition! I shed no tears for you and your kind! Ha ha ha ha ha! It will all be over soon!"
Sigma is one of the 8 generals under Lancer, leading the Maverick Division.
As the former leader of the Maverick Hunters, Sigma was originally the most advanced Reploid of his time. However, after his fight with Zero, he became infected by the Maverick Virus. Ever since then, he has plotted world domination numerous times, but X, Zero, and Yoshi stopped him. He joined Lancer, and became stronger after training and absorbing Dark Phazon.