Idun and the Apples, illustration from 'Teutonic Myths and Legends' by Donald A. Makenzie, Idunn/Iðunn - In Norse mythology the keeper of the apples of youth, she is known only through the myth “Idunn and the Golden Apples”
Wikipedia: In Norse mythology, Huginn (from Old Norse "thought") and Muninn (Old Norse "memory" or "mind") are a pair of ravens that fly all over the wo. Huginn and Muninn Classic Mythology Sketch Card
In Norse mythology, a Valkyrie is one of a host of female figures who decide who will die in battle. Selecting among those who die in battle, the Valkyries bring their chosen to the afterlife hall of the slain, Valhalla, ruled over by the God Odin.