Once the mall's most dedicated maintenance worker, he was investigating the mysterious basement flooding when the infection first emerged from the contaminated waters. The chemical cocktail of cleaning supplies in his system created a unique mutation that preserved his methodical nature while amplifying his physical capabilities into an unstoppable force.

This hulking entity retains the systematic thinking of its former profession, methodically patrolling the mall's service corridors and maintenance areas with supernatural persistence. Its massive frame can burst through barricades and locked doors, while its intimate knowledge of the building's infrastructure allows it to appear anywhere through vents, service tunnels, and forgotten passages. The infection has fused cleaning equipment to its body, creating improvised weapons from mops, wrenches, and chemical dispensers.

The Janitor Juggernaut serves as a persistent, evolving threat that escalates throughout the season, systematically eliminating safe zones by accessing them through maintenance systems. Unlike mindless zombies, it methodically cleans house by hunting survivors with strategic precision.