Xyveau joined SOS after her father died in the alien attack of 2574. A born leader, Xyveau helped protect Earth from several major alien attacks since. Her brother joined later and serves at SOS Command. Though they hardly talk with one another, they are very close. Xyveau has been studying command tactics for the eight years she has been in SOS Alpha Squad, and has been mentored by Captain Konan on occasion. Xyveau doesn't much like Konan, but she admits that she can learn a lot from the "old guy." Always liking to be the first in a fight, Xyveau jumps at any chance to prove that she is worthy of leading a squad herself someday.