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Flay, the daughter of Atlantic Federation Vice Foreign Minister George Allster, is a pretty, popular, and to some extent spoiled, Heliopolis technical college student. Her fiancé is Sai Argyle, which was arranged by their parents. She has received a love letter from Sai, which was mentioned in episode 1 of Gundam SEED. The only one of his friends she seems familiar with is Miriallia Haw, who she shares idle gossip with shortly before ZAFT attacks Heliopolis.

Source from Wikipeida