|Allegiance||initially the Night's Watch|
A Storm of Swords|
A Feast for Crows
The Night's King is a legendary commander of the Night's Watch.
Some claimed him to have been a Bolton, a Magnar, an Umber, a Flint, Norrey or Woodfoot. The only real information we have on the Night's King comes from one of Old Nan's stories which Bran recalls on reaching the Nightfort, in which she identifies him as a Stark of Winterfell and hints his name too was Bran. He was the thirteenth Lord Commander of the Night's Watch and a fearless warrior, he fell in love with a woman "with skin as white as the moon and eyes like blue stars...her skin was cold as ice." The description matches that of the Others.
Having brought her back to the Nightfort, he proclaimed her Queen and there they ruled for thirteen years, before his own brother, the King in the North, and Joramun of the Wildlings (Free Folk), the King-Beyond-the-Wall, brought him down. Afterwards it was discovered he had been sacrificing to the Others, presumably by giving up children to become White Walkers as Craster was later to do and supposedly all records of his name were obliterated.