- "Now take this sword, this Treaty-Blade. Occurian seal, mark of your worth. Cut deep the Cryst and seize your Shards. Wield Dynast King's power! Destroy Venat!"
- —Gerun to Princess Ashe
Gerun (ゲルン-王, Gerun-Ō?) is the leader of the Occuria in Final Fantasy XII. The one who has been manipulating Ashe into seeking power in the first place, Gerun leads the Occuria in their control over Ivalice history.
Gerun is voiced in the English version by Bernice Stegers and Seiko Tomoe in the Japanese version.
In ancient times, Gerun granted the Sword of Kings to the hume Raithwall to become their proxy in determining the course for Ivalice and manipulate history to their own ends. Raithwall obtained three shards of the Sun-Cryst, their magicite of power, to become the Dynast King, and played his part well in Gerun's ploy.
700 years later, the heretic Venat trespassed into the Hume realm, granting them means to create their own kind of nethicite and control their own history. Gerun then turned to Princess Ashe, the descendant of King Raithwall, to destroy Venat and the Empire - the judgment for making imitations and trying to control their own fate.
Luring the princess with a specter of her dead husband, Gerun hoped to fuel Ashe's hatred for the Empire enough to have her destroy it. However, the princess saw through Gerun's motive, and refused to be manipulated. She destroyed the Sun-Cryst instead, breaking the power of the Occuria over Ivalice.
Because Gerun (and the rest of the Occuria) are immortal, its name may originate from the Ancient Greek word, "geron", meaning "oldest".