Nayru, Oracle of Ages
From Zelda Legends Wiki
Nayru is the Oracle of Ages, someone who has power over time. The Harp of Ages is hers, and she teaches you two of the songs played on it. At the beginning of the game, she is singing in a protected forest. She is possessed by Veran, the Sorceress of Shadows, and forced to do her bidding in the past. She is rescued from Veran's grasp halfway through the game, but is powerless to stop her.