Arcade Dissidia Final Fantasy Arcade ‘Onion Knight’ battle trailer He may not be an actual onion, but he can still make you cry. The next in Square Enix‘s series of Dissidia Final Fantasy character battle trailers introduces Final Fantasy III‘s Onion Knight. If you missed it, previous character battle trailers introduced Firion and the Warrior of Light.Dissidia Final Fantasy is due out in Japanese arcades on November 26. If you missed it, catch the launch trailer here. Watch the Onion Knight battle trailer below.