Leon Burgundy

Leon Burgundy is the brother of Kurt, and like the rest of the Burgundy family, is a Temple Knight. His time in the Temple's depths turns him insane, causing him to seek Kurt's Gauntlet, thinking it will grant him power. This causes Leon to instigate some of the Events in Kurt's story. (Such as the attempted assassination of his father.) If you activate the final quest before defeating Agares, (A high-level monster in the Gauntlet) he will be the game's semi-final boss, going insane with power and challenging Kurt atop the Arcanian Mech. If Agares is defeated and the player plays the quest, he will not be present, the player fighting the Mech instead. Kurt's ending, and in turn Leon's fate, is the same, regardless.

Battle Quotes
For all the lines of the character, go here: http://www.youtube.com/watch?v=gG1ywWRXjv8#t=7m38s