Friday was a second generation Genetic Infantryman created by the Clavell Corporation to fight a war on the world he knew as Nu-Earth. The sole survivor of a massacre which wiped out the rest of the G.I's at Hill 392, Friday sought vengeance, discovering that he and his comrades had been manipulated all along by their creators and by the Artificial Intelligence known as Highside, which controlled the satellite where they had been 'born'. Heading off into the galaxy to make a new life for himself, Friday discovered the existence of the Bio-Chips, AI's containing the brain patterns of his deceased former comrades Top, Lucky and Eightball , which he slotted into his equipment (giving Eightball control of his rifle, Lucky his electronically augmented backpack and Top the surveillance equipment in his helmet). He also discovered the existence of a previous generation of G.I's created on a second Nu-earth halfway across the galaxy and met the survivors of that unit; Rogue, Gunnar, Helm, Bagman and Venus Bluegenes. Following the deaths of Rogue, Helm and Bagman, Friday appropriated Gunnar (who had been biochipped and placed in Rogue's rifle) and gave the mentally unstable Eightball over into the custody of Venus (who Eightball believed was his mother).

Friday and his comrades eventually drifted into mercenary work and became mixed up in a galactic war with a religious sect called the Karvanu. Eightball was 'killed', the remaining Biochips captured by the enemy, and Friday was last seen apparently falling into a black hole. His final fate remains unclear.