She's the first humanoid from the alien race of Coralians, sent as a blank slate in order to better observe and understand the human race as a whole, as well as to better emulate herself as a human. She is, unfortunately, found first by the government and trained to both pilot large mechs with organic innards called LFOs, as well as a soldier to purge rebels of the state.
She is completely devoid of emotion and completely obedient, until she finds three young orphans and decided to raise them as their mother. She escapes the military and with the aid of other defected members, decides to lead a resistance against the military.
It is later revealed that she holds a special connection with the Coralian "master brain" and that she alone must decide whether the human race and Earth are worth saving; a choice that is made clearly with the aid of Renton, a boy she makes a connection with and discovers true human emotions with.
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