Omega (オメガ, Omega?) was a monk of Yevon 700 years prior to the events of Final Fantasy X. The Maesters of Yevon branded Omega a traitor after he rebelled and exiled him off Spira's mainlands onto some small island ruins. Omega's hatred for Yevon grew so great and intense that when he died, he transformed into the fearsome fiend known as "Omega Weapon", as well as spawning the lesser beast known as "Ultima Weapon".
The islands on which he was sent to die were titled the Omega Ruins.
- For the battle information, see: Omega Weapon (Final Fantasy X)
- For the battle information, see: Omega Weapon (Final Fantasy X-2)
The Gullwings encountered the Weapons several times again in Final Fantasy X-2. The Sphere Hunters Yuna, Rikku, and Paine encounter Ultima Weapon in the Ruin Depths and Omega Weapon at the Farplane like normal encounters.