Square Enix has released only small portions of Final Fantasy XIII's plot since its announcement at E3 2006. Pulse is the name of the world in Final Fantasy XIII, a lush, natural environment inhabited by many monsters, resulting in humans living constantly in fear of an attack. The Crystals decided to create the floating city of Cocoon to protect the humans from this threat.[12] The Crystals of Final Fantasy XIII are sapient beings, able to create life forms and objects.[13]

Cocoon is a futuristic, utopian haven constructed by the fal'Cie, a mysterious race of beings that are beyond humans, when the Crystals decided Pulse was too dangerous for humans and instructed the fal'Cie in creating the Cocoon.[14][15] The Crystal of Cocoon protects and advances Cocoon through technological creations and the l'Cie, destined people chosen by the fal'Cie to carry out the will of the Crystals.[14][15] The citizens of Cocoon fear Pulse and its people, whom they believe are trying to destroy the city. The Holy Government of Cocoon has therefore quarantined anyone they believe to be linked to Pulse, and they are exiled from the city.[

main character in final fantasy 13