On Planet Prime, one individual dedicates themself to one discipline and masters it. They are then designated with the number one to signify their status. As Warrior One, he would be the ultimate warrior of the planet.
When the Silver Surfer arrived on the planet, Banker One accused the Surfer of devaluing their currency and called Warrior One to the scene. After a brief battle, the Surfer transmuted his badge, which caused him to be replaced by Warrior Two. With no precedent for such an event, he designated himself Warrior Zero and became a sworn enemy of the Silver Surfer.