The world in Final Fantasy XIII is named Pulse; as seen in trailers and scans, Pulse has environments that are filled with many monsters and looks like it is covered with greenery and forestry. Since these monsters can attack any human at any given time, the sentient Crystals created the floating city of Cocoon so that the humans who live on Pulse could be protected. Cocoon was constructed by the Farushi who are beings that surpass humans in every single way. The Rushi are people chosen by the Farushi to carry out the will of the Crystals. The Crystal that resides in Cocoon protects and gives technological creations to the utopian haven. People who reside there fear those who live in Pulse, and anyone who is believed to be from Pulse is quarantined and exiled.