Zero is a video game character present throughout much of Capcom's Mega Man franchise, who debuted in the Mega Man X series. He is an android and an elite member of the Maverick Hunters, an organization dedicated to defending humanity from rogue Reploids known as Mavericks. Zero also acts as a mentor and longtime friend to X, the main protagonist of the X series. He is also the titular main protagonist of the Mega Man Zero series, and has a supporting role in other series in the franchise, such as the Mega Man ZX series. He has also appeared in crossover video games as a guest character.

Mega Man is a Japanese science fiction video game franchise created by Capcom, starring a character named "Mega Man". The original game was released for the Nintendo Entertainment System in 1987, and spawned a franchise that expanded to over 50 games on multiple systems. As of October 2023, the series has sold 41 million units worldwide.