Her name is Princess Triennia, she was the princess of North Earth while Endymion was the prince of South Earth. To stop the war between their two people the two were engaged to be married and spent every summer living in a special palace that had been built right on the border. The night before the wedding she overhears Serenity, her best friend, and Endymion talking. They had fallen in love. Triennia sacrifices her own feelings and cancels the engagment letting Serenity and Endymion live happily. She leaves Earth forever and goes with them to the Moon. she renounces her original senshi name, Sailor Earth and the colors blue and green. She becomes Sailor Rose wearing green and red. She and Endymion had always had a love for roses, he promised that he would always love her liek a sister as long as roses exist in the world.