The mysterious Zippo is a flamethrower robot, originally part of an elite special forces unit under the direct command of Colonel Lash. He has a long, only recently revealed, history with each of the surviving members of the original ABC Warriors, and was the only survivor of the massacre of the Robo-Paratrooper regiment other than Mongrol. He developed a habit of inscribing messages on the weapons of his comrades. While the Warriors are generally grateful to Zippo for his past assistance, his history is a murky one, and he has in the past performed ethically dubious acts when ordered to.
Centuries after the war with the Volgans, Zippo turned up in Marineris City on Mars, and became a revolutionary and outlaw. He was captured and condemned to death by the authorities, but saved by the ABC Warriors, joining them as a replacement for the traitor Blackblood.