The party of playable characters is accompanied by Fon Master Ion, the leader of the Order of Lorelei, a neutral theocracy trying to calm the power struggle between Malkuth and Kimlasca-Lanvaldear. Though he is not a playable character, he accompanies Luke's party for most of the game. He is calm in most situations, and can utilize Daathic fonic artes, break Daathic seals, and read the Score from fonstones, all of which can easily tire him out.
Text from wikipedia
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