Gestahl

Previously the court magician of Emperor Gestahl, Kefka would later overthrow him while pursuing his own schemes for god-like power.

Gestahl: I've lost my will to fight..

Ramuh: Gestahl's method is incorrect.

Soon after, Gestahl takes advantage of this and attacks the espers' land, capturing several of them.

Soon, they find the espers and Terra convinces them to accept a truce with Gestahl.

The Returners attempt to stop them from causing further damage, but despite their efforts, they are unable to prevent Kefka and Gestahl from gaining the power of the statues.

The Returners reunite, now aware that the peace was a ploy for Gestahl to obtain magicite and the stone statue remains of the Warring Triad within the espers' now-unsealed land.

Using the espers as a power source, Gestahl initiated a research program to combine magic with machinery and infuse humans with magical powers, the result being a craft known as "Magitek".

When the Returners arrive in the capital, they find Emperor Gestahl claiming to no longer have the will to fight, inviting the Returners to a banquet to negotiate peace.