The Symbionts are cybernetic lifeforms created by Dr. Gustaf Brackman within the Earth Empire.
The symbionts are humans that have merged with artificial intelligence mostly from replacement of the nervous systems with cybernetic enhancements. Symbionts can integrate and process data at superhuman speed and interface with computerised technology.
The Symbionts were the creations of Dr. Gustaf Brackman, and used by humanity to accelerate their technology and expand their empire.
When the Symbionts attempted to demand equal rights, the Earth Empire reacted by installing Loyalty programs within their programming, virtually enslaving the symbionts. Dr. Brackman disgusted by the action of the Empire over his children escaped with a handful of his loyal symbionts to a distant planet and created the Cybran Nation.