Nayru (Oracle)

The human Nayru is best known as the Oracle of Ages. Due to their identical names, and similar personalities and symbolism, it has been theorized that she is an incarnation of the goddess Nayru herself.

Oracle of Ages
She first appears in the game, Oracle of Ages, which is, of course, named after her title. She is a singer with one of the finest voices ever heard in Labrynna. However, her true identity as the Oracle of Ages is exposed when Veran possesses her in order to take control of Naryu's ability to control the flow of time. (See: Possessed Nayru)

Ralph, her protector whom she has known since they were both children, is a close friend of hers. Nayru also possesses a mystical instrument known as the Harp of Ages, which allows Link (and presumably whoever holds it) to shift through the folds of time, when the right songs are played.

The Minish Cap
Nayru also appears in The Minish Cap, where it is mentioned that she descends from a long line of priestesses in Labrynna. She is one of the sisters in the inn (along with Din and Farore).

Quote from The Minish Cap Nayru figurine: "She's looking for a house in Hyrule to move into. She is a descended from a line of priestesses in the land of Labrynna."