Mirage Koas (ミラージュ・コースト, Mirāju Kōsuto) is one of the main characters of Star Ocean: Till the End of Time. She's a long-time friend of Cliff and his partner in Quark. Quiet and mild-mannered, she is an excellent fighter, as befits the daughter of a dojo-owner. Cliff learned to fight at the same dojo club and throughout their youth had many matches.