Princess Kakyuu
She wanted the 3 Lights and the Sailor senshi to join together to defeat Sailorgalaxia, but Sailorstarhealer, and Sailorstarmaker didn't like that idea. Eternal Sailormoon wanted sooo badly to talk to her, but Super Sailoruranus, and Super Sailorneptune, wouldn't allow it.
However, Princess Kakyuu didn't live long. Sailorgalaxia attacked Princess Kakyuu, and eventually stole her beautiful star seed. Sailorchibichibimoon tried her very best to save Kakyuu, and as she held her hand, Kakyuu said, "A warm feeling." Then Princess Kakyuu died instantly.
She came back to life when Sailormoon turned Galaxia good and Galaxia returned all the star seeds. Princess Kakyuu left the Earth with the Starlights. Hoping to return peace and tranquility to her planet.