Also known as: シグマ, シグマ(ロックマン), Sigma
Former commander of the Maverick Hunters in Mega Man X (Series) before turning maverick himself. His appearance differs between games greatly due to constant resurrection between each installment. The basic appearance can be considered very tall, Bald, possessing a vertical scar across each eye, a red Forehead Jewel, Robot Ears, and a Cleft Chin. His body isn't always complete, but it largely resembles the first iteration's anatomy.
- Appearance in X-DiVE, same as he was in X1.