What is a gerund?

[rayheinrich]

“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!”
—Gerund to Princess Ashe

Gerund (ゲルン-王, Gerund-Ō?) is the leader of the Occuria in
Final Fantasy XII. The one who has been manipulating Ashe into
seeking power, Gerund leads the Occuria in their control over
Ivalice history.