One of the Oceanus class ship' AIs. She mainly supports transferring the Zegapain, but is also responsible of monitoring interior sensors onboard Oceanus. She is destroyed when Sin infiltrates the Oceanus and reinstalled as Fosetta II. Her personality is markedly different after her installation; Fosetta II is unusually cold compared to Fosetta. She is also capable of controlling the Caladrius as a Wizard.  (Source: Wikipedia)

Kyo, an avid swimmer tries his best to keep the high school swimming club going, which is pretty hard when he's the only member. Facing the prospect of the club being closed by the student council, he tries to enlist beautiful Misaki to act in a promo video, shot by his good friend Ryoko, in a bid to start a recruitment drive. She agrees but only if he pilots a mecha under the wing of Celebrum, a resistance organisation fighting to destroy Deutera Areas formed on Earth by the aliens Gards-orm. He agrees but finds it all strangely familiar as if he's done it before...
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(Source: Anime News Network)

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The prequel movie to the Zegapain TV series explores the events during the initial server resets experienced by Kyo. These events ultimately lead to the moon mission.

Fosseta