Harry Creighton, a former Special Service of Crime detective, vanished after his girlfriend Eve Palmer collapsed from sudden heart failure. His disappearance coincided with defecting to LIVE Corporation as a mercenary, driven by their offer to sustain Eve’s comatose state through advanced medical care. The corporation manipulated her condition to force his cooperation, tasking him with tracking targets tied to their experimental bio-mask projects.

Once calm and adaptable, Harry’s psyche unraveled as Eve’s condition worsened, his physical deterioration mirroring her decline. His loyalty remained solely with Eve, rejecting allegiance to any faction or person beyond her. Though positioned as an antagonist, he intermittently allied with SSC detective James Blood, his ex-colleague, when mutual adversaries like the assassin Grimm demanded temporary truces.

Harry spearheaded assaults on SSC safe houses to capture Tina Herst, a pivotal bio-mask engineer. In one operation, he breached a fortified site, extracted Tina, and clashed with James before withdrawing. Combat tactics showcased expertise in firearms, blades, and hand-to-hand engagements, marked by a preference for devastating kicks to overpower opponents.

Eve’s death became a pivotal juncture, with evidence suggesting Harry took his own life, stripped of his sole purpose. His dynamic with James oscillated between hostility and uneasy collaboration, echoing unresolved bonds from their SSC history.

The manga spin-off *Hero Mask: A Lost Memory* does not expand on his involvement, leaving his presence in extended media undefined.