Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
This deity owns Hildesvini, the "battle boar," which is actually the human Ottar in disguise. Other possessions include the eternally loyal chamberbaid Fulla; falcon skin that allows one to take the form of a bird; and the palace of Folkvang, where love songs are always played in the hall of Sessrumir. Depicted as riding into battle in a chariot drawn by two cats, she is always found wearing the necklace of the Brisings, though it was once stolen by Loki. FTP, name this daughter of Niord, the foremost goddess of the Vanir and sister of Frey.
A:
Social Science