Cid Highwind was originally an aspiring astronaut under the ShinRa Space Program, but his dream of going to space was crushed with the cancellation of the project as the ShinRa chose to delve into Mako energy instead. Cid, himself, pushed the abort button when Shera refused to leave the rocket before her repairs were done. Coarse and brash, Cid continued to live in Rocket Town until joining AVALANCHE to fight Sephiroth. The Highwind, his airship, was destroyed when the group escaped from the crumbling Northern Crater.
Cid returned two years later in his new ship, the Sierra (named after Shera) to assist Cloud and Tifa in protecting Edge from Bahamut Sin's attacks.