Ai, or as the scientific team that helps maintain her call her, Unit-i, is a sixteen year-old-girl who also happens to be the rumored new weapon, Yuugi's salvation. Armed with mysterious psychokinetic powers, Ai quickly displays her value as an emergency precaution - if not an outright solution - protecting against the extraterrestrial viral threat. <br /> <br /> (Source: Animefringe) <br /><br />