An insane harlequin who lacks self control as a result of experiments infusing him with Magitek power. He finds no greater joy than destruction.
—Dissidia 012 description
A mage who finds no greater joy than in destruction.
—Dissidia Final Fantasy description
Kefka is one of Emperor Gestahl’s top Imperial Generals. He begins the game as a simply court mage but later transforms into a powerful, high ranking military official. As the first experimental Magitek Knight of the Empire, his mind warped in the process. We don’t know what he was like beforehand, be he became a sadistic sociopath afterward.
Much like in Final Fantasy VI, Kefka desires nothing but destruction. His personality doesn’t change from worlds he’s in. Unlike most of the other warriors of Chaos, he simply battles for the fun of it. He has no real motive other than to cause as much harm as possible. At times, he’ll even manipulate his teammates.
When does Chaos summon Kefka to World B? Most likely when he becomes a god. On the Floating Continent, Kefka moves the Warring Triad out of alignment. Somehow he drains the Triad of their powers, becoming a “god” in the process. He builds a Tower to Nothingness, and
He’s able to change into his godlike form in World B. This suggests Chaos summoned him during the World of Ruin. However, he realizes his folly during his battle with Terra:
Kefka: “It’s not enough… Destroy more… Have got to destroy more!”
Terra: “Just stop! None of this makes any sense!”
Kefka: [laughs] “Destruction isn’t supposed to make sense! It’s only fun when it’s senseless! Why create, when it will only be destroyed? Why cling to life, knowing that you have to die? None of it will have meant anything once you do!”
Terra: “We live to protect what we hold dear. As long as you have that, you can find the meaning on your own.”
Kefka: “Meaning schmeaning! The whole world’s going bye-bye! You included! Life… Dreams… Hope… Where do they come from? And where do they go? None of that junk is enough to fulfill your hearts! Destruction… Destruction is what makes life worth living!”
He then stays at his monument to nothingness, waiting for the Returners to face him. By now, he already knows his fate and looks back on his ambitions as meaningless. He loses the final battle. It doesn’t matter to him anyway. He destroyed all he could. In the end, it didn’t matter.