The Superjail Soldiers were the servants of the future Warden. It is not known if they were cyborgs or humans. They were cold-blooded and ruthless killing anyone that defied the Warden's regime. It is likely that these Soliders are the past prisoners of the Warden as the gay couple and Gary are seen dressed in their uniforms. They were all eradicated from history when the future Soliders were a part of never happened.