Corrosis is a hostile world whose surface is covered by an acidic ocean beneath toxic atmosphere. No one would attempt to colonize it, were it not for the mineral-rich resources buried beneath the ocean floor. So, corporations have established networks of submarine domes at the bottom of the ocean, home to mining operations. This is where Cyan was born. He spent his childhood here, in an underwater company town, never laying eyes on skies, stars, or sunlight.

At a young age, tragedy struck when Cyan's dome experienced a critical breach, and acid poured into the mining facility. All the workers, including Cyan's family, perished in the disaster. Only Cyan miraculously survived, though only barely; the acid burned away two of his limbs and severely scarred the rest of his body below the neck. When Republic forces arrived to provide relief, a Jedi identified the reason for Cyan's survival. The young man was saved, apparently, by the Force.

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