Idun, wife of Bragi, is the power in charge of making sure the Aesir remain young. She does this by keeping charge over the Apples of Youth, which she feeds to them once every year come spring. Obviously, the apples make Idun a prized commodity among the near-immortals of the planes, and they've tried to kidnap her several times. Each time, the other Norse gods have rescued her before the villains could eat of the apples, but surely one of these times they'll slip - and the giants will be waiting.
Idun shares a home with Bragi in Asgard, and though she visits her husband in HarpHearth from time to time, prefers to remain among her fellow powers. The Aesir, naturally, value her because she's the only one who can pluck the apples from the Tree of Youth, but Idun's earned the friendship of deities outside the pantheon as well, including Lathander of Toril.