Idunn

Idunn is the goddess of the golden apples/apples and youth. She grants eternal youthfulness. She is very important to the gods, since in Norse Mythology, they aren't immortal, so Idunn harvests the apples from the world tree. Her apples gives eternal youthfulness.

Marvel's Idunn
She was appointed by Odin to guard the golden apples from the world tree.

Families and relations
Husband: Bragi