- "Only one... who renounces everything... possesses the strength... to transcend anything. Lady Yuna, you are the paragon of pastlessness!"
- —Trema to Yuna
In the two years after Sin's defeat, Trema, a former denizen of Yevon, wished to learn more about Spira's history, hidden all over the world in the form of Spheres. Thus he created Sphere Hunting, which soon became a popular craze amongst young people, and began searching Spira for lost spheres. Trema then founded New Yevon in an attempt to bring some stability back to Bevelle and those people who had fallen out of touch; however, he then decided that Spira should not be looking to the past but to the future, and stole all the spheres that had been discovered and descended into the depths of Via Infinito deep below the city, where he destroyed them. However, he never resurfaced, and New Yevon elected a Chairman who continued the good work that Trema began, unaware that their founder was still in the Via Infinito, where had turned into an Unsent and a very powerful foe. Trema can easily be noted as the most difficult boss in Final Fantasy X-2.
The Gullwings soon ventured into the Via Infinito and upon reaching the final Cloister, found Trema waiting. Because Trema had the ability to control Fiends, Trema may had already been dead prior to entering the Via Infinito.
- Bài viết chính: Trema (Boss)
Trema is fought in the depths of the cloisters in Via Infinito. He is regarded as the superboss in the game.
- It is assumed that Trema was also seen asking Yuna if he could look into her eyes and "show him the long road she has traveled", thus letting Yuna and her guardians enter the Zanarkand Dome. He is also shown after completing the Cloister of Trials in Zanarkand and gives the group a history lesson about the Final Summoning, telling them to go to Lady Yunalesca for the Final Aeon instead of relying on what they thought would be a Final Aeon already waiting for them.
- Although it is never heard during the game, Trema recites lyrics from the Hymn of the Fayth before casting Meteor.