Freyja

Freyja is the daughter of the sea god Njord and an unnamed mother, possibly the earth goddess Nerthus or a sister of Njord from the Vanir. She came to Asgard as a hostage after the Aesir-Vanir War, along with her father and twin brother Freyr. In exchange, the Aesir sent Hoenir and Mimir to the Vanir. The Vanir, feeling cheated, beheaded Mimir, but the exchange brought lasting peace. Freyja taught the Aesir the magic of seidr, a form of shamanic sorcery previously unknown to them. She became so beloved among the gods that she was granted her own hall, Sessrumnir, in the field of Folkvangr.