Onimusha Blade Warriors is a fighting video game developed and published by Capcom for the PlayStation 2. A spin-off of the Onimusha series, Blade Warriors is a 2D fighter game featuring many of the characters of the Onimusha franchise.

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.