Kefka Palazzo is a character who is originally from Final Fantasy VI and is also the main antagonist of the animated movie.
In KH: ITHOTCR, Kefka Palazzo is the stauchest supporter of Master Xehanort and close friend of Maleficent. He plans to have Claude Frollo accuse Yeul of being a Gypsy, also Esmeralda. Once Frollo dies by falling, Kefka takes revenge and lets Garland abduct Yeul instead. He, Master Xehanort and Emperor Mateus are the co-leaders of The Warriors Of Chaotic Darkness.