Sigma Megaman

Sigma was created by Dr. Cain as his magnum opus, considered the most advanced Reploid of his time.He was put in charge of the Maverick Hunters after their formation, making Sigma the first Reploid to lead worldwide peacekeeping efforts. He specifically commanded the 17th Elite Unit, leading them for at least four months with no defects (or two years according to the Japanese version of The Journal of Dr. Cain). One day, the Maverick Hunters received reports of an overwhelmingly powerful "Red Maverick" that had destroyed an entire unit of Hunters. Sigma and his unit tracked the Maverick down to an abandoned laboratory; Sigma chose to face it alone, so as to not endanger his colleagues. It is here that Sigma encountered Zero, the last product of Dr. Wily. Zero, having suffered a programming flaw from his creation, was an uncontrollable berserker. Sigma was caught off-guard by Zero's strength and suffered heavy damage. Fortunately, Sigma was saved when a 'W' appeared on Zero's forehead, causing him great pain and allowing Sigma to knock him out by punching his head. In the process, however, the Maverick Virus lingering in the laboratory was transferred to Sigma, infecting him. Following the battle, Sigma ordered the rest of his unit to retrieve Zero's body and contact Dr. Cain for study, limping away. He was later repaired and reassumed control of the Maverick Hunters as usual. However, the Maverick Virus festered in his mind - while Sigma's highly-advanced circuitry kept him sane for a while, his thoughts became more Maverick over time. The Maverick Virus gradually fused with his mind, mutating into an even more dangerous virus called the Sigma Virus which he held complete control over. Without moral inhibitions, Sigma considered the role of Reploids in the world; for example, he noticed the rookie X and his dedication to justice, and began wondering how Reploids could change the world.

As the former commander of the Maverick Hunters, Sigma is a capable military leader, described as possessing overwhelming combat power and strategic intelligence. His circuitry is the most advanced of its time, which allowed him to maintain a semblance of sanity even while mutating with the Maverick Virus. When he finally gave in and turned Maverick, Sigma remained a charismatic leader. If his wiles are not enough to sway one's mind, he is also able to infect them with the Sigma Virus to force them into madness and loyalty. Due to his affinity with said virus, Sigma's "spirit" can also survive seemingly any physical damage that would be lethal to other Reploids. It is undetectable by conventional scanners, and can only be sensed by Reploids.[4] Its intangibility also allows it to ignore physical assaults and energy attacks, except for those tuned with a Virus Buster or Dr. Doppler's vaccine. His Sigma Virus was only deleted by the Mother Elf.

When not in his viral form, Sigma always has the most physically advanced and variable Reploid bodies available at the time. It is frequently stated that he was said to be the most powerful Reploid of all time.[5] He possesses incredible strength and speed, is often able to move faster than the Maverick Hunters can follow, and is usually capable of teleportation. In his first body, during a conflict with the Maverick Zero, he was able to effortlessly break through Zero's defenses with a round kick, as well as easily toss him through the ceiling with a single arm. He is also fond of incorporating himself into a variety of battle bodies, each possessing widely different arsenals. He is a capable warrior regardless of whatever weapon he wields, whether it be a beam saber, beam claws, or a shield. In nearly every appearance, Sigma is capable of discharging enormous destructive blasts or waves of power capable of covering entire battle areas, and he is a skilled marksman.

He possesses a bald human head with a gem in his forehead and a cleft chin. His eyes are light blue or white, possessing no irises or pupils, and with a scar torn over each eye (sometimes the scars are merely cosmetic, such as in Mega Man X8 where they are lines running down his entire face). His tall and bulky frame resembles a muscular human body, and his color scheme always includes green and/or purple.

The former legendary leader of the Elite Seekers, now the charismatic and ruthless ruler of the Maverick. He possesses a brilliant tactical mind and an unwavering faith in his cause. He sees humanity as the most important thing. He is practically impossible to destroy—his consciousness, like a virus, migrates from one powerful body to another. A majestic, powerful, and, in his own way, principled tyrant. Sigma sincerely believes he is the savior of the world. He views humanity as a weak, corrupt, and destructive race that is dooming the planet. His goal is not simply destruction, but the creation of a "new world of order" where repliroids, as superior beings, will rule. This makes him not just a madman, but a dangerous ideologist with, in his opinion, "high goal".