Gala never speaks in his true form, acting in accordance with the task given to him. When he possesses Cid, he speaks in an arrogant and condescending way, treating humans, especially Class Zero, as being beneath him.
Gala is a servant of the deity Lindzei who, alongside Arecia Al-Rashia, oversees the experiment to find Etro's Gate in which the land of Orience plays a vital part. His role is to arrive when Orience has become imbalanced as the result of one nation dominating the other three: Sending his Lulusath Warriors on the population in an effort to create a flood of souls and force Etro's Gate to open. At this time, Gala also chooses a host to become the l'Cie Arbiter of Lulusath who would instigate Finis before preparing for the next repeat of the cycle. This cycle of war, destruction and resurrection has been repeated 600,104,971 times. Each preceding time, a group of Peristylium Suzaku students, Arecia's chosen instruments for opening Etro's Gate, became l'Cie and died fighting the Lulusath Army. The l'Cie Arbiter absorbs their phantoma, the world resets and events repeat themselves.
At the time of Final Fantasy Type-0, the 600,104,972nd repeat of the experiment, Gala reappears with his Lulusath warriors when the Dominion of Rubrum ends up dominating the whole of Orience in the aftermath of the unleashing of the Grand Eidolon Alexander. He is later convinced into calling the Lulusath off by Arecia after Class Zero, her chosen instruments, choose not to become l'Cie, changing the course of events that had repeated in previous cycles.
When Cid arrives in the Palace of All Magic with the intention of becoming Agito, Gala meets with him and tells Cid his fate to become the l'Cie Arbiter. Cid kills himself in a vain attempt to prevent this and his body is then possessed by Gala. Gala then guides Class Zero through the Palace, setting them tasks to test their metal, although they are seriously weakened in the final test. During the final battle with Class Zero, the l'Cie Arbiter is destroyed, with the twelve members absorbing his phantoma at the cost of their lives and saving Orience. Gala descends into slumber after this.
- Like Barthandelus he is a servant of Lindzei who sets out to open Etro's Door by means of killing most of humanity.