Zero (ゼロ) is the deuteragonist of the Mega Man X series, the main protagonist of the Mega Man Zero series, and also an important supporting character in the Mega Man ZX series as the Biometal Model Z. He is the successor of Bass and the greatest creation of Doctor Albert W. Wily. A high ranking Maverick Hunter in the X series, and a legendary freedom fighter in the Zero series, he’s a die-hard warrior who doesn’t hesitate to take action. However, behind his cold and emotionless attitude lies a wounded soul.

In Zero’s first appearance, his armor’s design had a distinct red color with white highlights along his knees, toes, abdomen, and shoulders. One of his shoulders was emblazoned with a stylized “Z” insignia, and his helmet had extended face guards around his cheeks and curved ridges on top that resembled horns. His forehead was white with a deep blue lens on the front. He possessed two green lenses on his chest, arm guards on his wrists, and a flowing blond head of hair that extended from the back of his helmet. He also stood slightly taller than X. This version of Zero was apparently an incomplete prototype, since his upgraded design is shown in his blueprints in Mega Man 2: The Power Fighters.