 After Le Mu (Ra Mu in the Japanese version) is defeated, it is revealed that her primary reason for reviving Mu is so that she could use its power to bring her dead lover Altair (the only person whom she ever formed a BrotherBand with), back to life.Altair, who sometimes referred to her by the pet name of "Vegalita", had to leave her in order to fight in a war.He died fighting in the war, and as a result, Vega became bitter, and ultimately blamed the world for his death, leading her to become a scientist, and after discovering Mu, she vowed to unleashed her vengeance leading to the events in the game.