Iðunn (or Idunn) is the vital Norse goddess of youth, spring, and rejuvenation, known as the keeper of golden apples that grant the Æsir gods their immortality and eternal youth, symbolized by apples, long golden hair, and sometimes an eagle, famously linked to Bragi and her abduction by the giant Þjazi orchestrated by Loki.

Key Aspects & Description:
Role: She guards the magical apples of immortality, ensuring the gods stay young and strong, a crucial function for Asgard's survival.
Appearance: Often depicted with long, golden hair, symbolizing vitality, and associated with apples and nature.
Spouse: Married to Bragi, the god of poetry, who introduces her story in myths.
Key Myth: Her abduction by the giant Þjazi (with Loki's trickery) causes the gods to age rapidly, highlighting her indispensable role, and Loki is forced to rescue her.
Symbolism: Eternal youth, renewal, life, and the life-giving power of nature, often linked to orchards and spring.
Family: Her father is sometimes named as the dwarf Ivaldi, but sources are sparse on other family.
Attributes: Carries a casket (eski) of golden apples and is sometimes associated with the eagle, the creature that brought her to Þjazi.

In Popular Culture: She appears in the TV series Vikings, where she interacts with Hvitserk, offering him apple mead and comfort. The video game God of War (2018) features collectibles called "Apples of Idun" that boost health, referencing her life-giving power.