Professor Gary Evans is a scientist central to the Mask project, collaborating with fellow researchers to create advanced technology granting users supernatural abilities. He sports a bald head and a long white beard. His expertise places him at the heart of a conspiracy involving these masks, technology pivotal to criminal investigations by the high-tech police organization, the Special Service for Crime Prevention (SSC).

Evans acts as a close ally and mentor to the primary protagonist, James Blood. He equips Blood with vital intelligence and guidance, aiding him in unraveling complex conspiracies and navigating institutional corruption. Their alliance focuses on exposing truths behind mysterious deaths and the masks' distribution, revealing links to powerful corporations and government entities. Despite his intellectual contributions, Evans bears significant emotional burdens from past mistakes, exhibiting guilt and internal conflict over the masks' development and their destructive consequences.

His work directly fuels the series' core conflict, as the masks enable users to commit violent acts with enhanced strength, regeneration, or other powers. Evans' knowledge proves essential for understanding and countering these threats. However, his involvement ultimately results in his demise, with official records confirming his status as deceased.