Paygan, dubbed the "Bloody Reaper," fights in the underground AT gambling circuit, governed by a conviction that combat is a lethal crucible where only the victor earns survival. His ruthless brutality—executing defeated foes despite protests—stems from military conditioning, cementing his belief that triumph justifies any extremity.

After defeating Irvine Lester in a rigged match, Paygan’s discovery of the deception fuels a vengeful obsession. He augments his AT, the Bloody Dog, with impractical heavy armaments: long-range cannons, missile clusters, and over-engineered systems prioritizing raw destruction. His vendetta escalates beyond the arena; he dismantles Irvine’s repair shop and orchestrates events to force a lethal confrontation.

Fixated on military hierarchy, Paygan unearths Irvine’s wartime identity as "Bishop One," who survived an ambush by slaughtering allies and enemies alike. Framing their final clash as a duel to crown the "ultimate soldier," he weaponizes Irvine’s trauma to provoke an unfiltered battle, rejecting staged combat as hollow spectacle.

Paygan’s competitive fervor spirals into self-immolating fixation, his rigid battlefield ethos clashing with Irvine’s survival-driven pragmatism. The conflict culminates in Paygan demanding a life-or-death reckoning, unable to adapt his militaristic dogma to a world no longer at war.