"From the stars and the crescent moon, a queen of light, ruled this rambling place. Each night she walked the palace alone, her luminosity dawn's own face."
The Queen of Light was the ruler of Lemuria before she suddenly disappears one day, allowing the Black Queen and her two daughters to conquer Lemuria with dark creatures.
The Queen of Light , in Aurora's Flashback, She is fine, then feels "Sick" and Dies
But that is not true because, She is with Aurora before she fights Umbra