Kefka Palazzo (spelled as Cefca Palazzo in the Japanese version), also known as Lord Kefka and Master Kefka, is the main antagonist of Final Fantasy VI. Kefka is an evil clown who acts as the court mage of Emperor Gestahl of the Gestahlian Empire early in the game, and simply carries out his monarch's orders.
Sephiroth (in Japanese: セフィロス Sefirosu) is the primary antagonist of Final Fantasy VII and Final Fantasy VII Advent Children, and a major antagonist in the extended Final Fantasy VII universe, Compilation of Final Fantasy VII, and also the Kingdom Hearts franchise.
Kuja is the main antagonist of Final Fantasy IX. He is a mysterious man who is revealed to be a Genome, one of the humanoid beings manufactured to provoke war between humans, he operates behind the scenes, at first working in Queen Brahne's shadow.
Seifer Almasy is the rival of Squall Leonhart and a villain in Final Fantasy VIII. He is a very selfish person who was turned to the dark side by Sorceress Ultimecia. He is usually accompanied by his two followers and loyal friends named Fujin and Raijin.