Zero
Following the events of the Mega Man X games, Zero is once more sealed away in suspended animation, this time in a new body, only to be revived a century later by Ciel. Assisted by Ciel and the Cyber-elves, Zero sets out to aid the Resistance in their battle against Copy X and the forces of Neo Arcadia. At the end of Mega Man Zero 4, Zero ultimately sacrifices himself to destroy a colossal space cannon, saving the entire planet as his final act.
Ciel
Ciel is a kindhearted, technologically altered human prodigy manufactured by Neo Arcadia and specializing in Reploid research and development. Upon the disappearance of Mega Man X, Ciel created Copy X to take his place. Once Copy X turned on the Reploids, Ciel’s guilt led her to form the Resistance.
Cyber-elf X
Mega Man X is revealed to have severed from his original body and transformed into a Cyber-elf. Cyber-elf X gives Zero his Z-Saber back at the beginning of the series, after holding on to it for a century. He continues to assists Zero in this form until his canonical destruction in Mega Man Zero 3.
Cyber-elves
Cyber-elves are a varied race of sentient computer programs constructed from pure energy. Zero can obtain and equip numerous Cyber-elves that provide unique abilities or gameplay benefits. Cyber-elves typically fall into one of four types: Animal, Hacker, Nurse, and Rare. Mega Man Zero 3 and Mega Man Zero 4 introduced additional Cyber-elf classes.
