Zero

''This article is for the character. For the series of the same name, see Zero (series).'' Zero is the titular main character of Zero, and a supporting character in the Zero: Origins series, serving as a guide to his predecessor, Aero.

Originally an AI that guided Aero, Zero was given a robotic body designed to look like a human by Dr. Murphy in order to ensure safety in the city. Armed with a variety of powers, Zero faces off against a wide variety of villains and vigilantes, while unknowingly trying to change destiny.

Zero's greater purpose is revealed by Xeno, Zero's nemesis from the future. He explains that Dr. Murphy came from the future and built Zero to stop the present Xeno from causing chaos that would lead to a dystopian future. In Timeline 2, where Xeno is from, Zero and Xeno are archenemies and have been for quite some time.

Origins and helping Aero
Zero was created by Dr. Murphy as an artificial intelligence to help him out in his lab, and during the creation of Aero. As Aero's helper, Zero would guide Aero and give him information about the subject in question. Never leaving Aero alone, Zero helped Aero in destroying Dr. Cyanide's doomsday device. But Aero was not able to defeat Xeno, and was killed in the following explosion.

Fearing that Xeno could not be stopped now, Dr. Murphy took Zero and blueprints for Aero with him to the past, where Xeno had not yet attacked. After three years, Dr. Murphy finally finished his ultimate project. He had given Zero his own robot body and the ability to think for himself, albeit Zero did not have any malevolent intentions against humanity and dedicated himself to protecting the city and the world.