Idun is a goddess from Norse mythology, known for her role as the keeper of the golden apples of youth. These magical apples grant immortality to the gods, ensuring they remain youthful and vibrant. Idun is often depicted as a beautiful woman who is essential to the well-being of the other deities in the Aesir pantheon. In the myths, Idun is kidnapped by the giant Thjazi, which leads to a crisis among the gods as they begin to age without her apples. The hero Loki eventually rescues her, restoring the gods' youth and vitality. Idun's story highlights themes of renewal and the importance of balance in nature.