Rutee was born 18 years before the story begins to Hugo Gilchrist, President of Oberon Corporation, and Chris Katrea. Two years after, she was followed by her younger brother, Emilio Katrea. Their family was happy until one day when her father discovered what he believed to be the Swordian, Karell Bersellis. In truth, however, though its body was that of Berselius, the soul contained within was that of Kronos, King of the Aetharians.