Zero
Zero is a reploid who has been assigned to the group that is trying to wipe out the mavericks, the Maverick Hunters. He is a powerful reploid and is an effective fighter against the mavericks. Zero and X became fast friends and they now fight together against evil.

Zero was made by doctor Albert Wily , but it has been rumored that Zero used to be a maverick and was defeated by Sigma when he lead the Maverick Hunters. Zero was then repaired and reprogrammed to fight for good instead of evil. After some speculation and rumors, it is believed that Zero was created by Dr Wily and that Mega Man X was the original Mega Man that was enhanced by Dr Light and sealed away for thirty years. Dr Wily's purpose for Zero could have been to destroy X, but little is known at this point.