Shackles: A Russian mutant who had strength experiments performed on him by the Defiance, who implanted animal muscles into his body, turning him into an uncontrollable monster with freakish strength, he uses the cuffs and chains on his wrists, which are made of unbreakable titanium and were originally used to keep him under control, as weapons. Shackles is captured by Aaron in "Mutant Rain (Part 1)"

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