The main villain of the season, Cain was once an acquaintance of Iris who was presumed dead in a failed stealth mission several years before the season begins. Having survived, he returns out for blood, blaming Iris for his near-fatal mishap all those years ago. As a character he is relentless and manipulative, convincing Bryce Rae-Turner and Lukasz-16 into his service, and is also a gifted fighter, frequently squaring off against and besting the protagonists. He speaks fairly quickly, with a snide, hissing tone that frequently turns low and menacing.

Cain will return for Season 4 of Infinity, so his voice actor will need to be committed to that season as well.