Osha

Osha is a wildling spearwife, one of the "Free Folk" who live north of the Wall. Like other wildlings, she worships the Old Gods of the Forest. Due to the rising threat of the White Walkers and their undead wights, Osha fled south of the Wall with a group of other wildlings, hoping to go "as far south as south goes". They bypass the wall by taking a boat across the Bay of Seals, to the east of the Wall.

Osha works as a servant of Winterfell.

Background
Osha joins Stiv and Wallen to form a band of wildlings. They fled south and abandoned their service to Mance Rayder. The group cross the Wall and travel into the Wolfswood north of Winterfell. They chance upon Bran Stark and try to steal his horse. Robb Stark intervenes, killing Wallen and taking Osha prisoner. Stiv holds Bran at knifepoint, but is shot in the back by Theon Greyjoy. Osha surrenders to Robb and is taken to Winterfell.

Osha is put to work as a servant. Theon is irritated when she refused to call him "My lord," especially when she correctly pointed out that his father is still alive so he is not entitled to the honorific title yet. Maester Luwin sends Theon away and asks Osha why she was south of the Wall. She replies that there were things sleeping under the ice which are not sleeping any more. Luwin is skeptical of her claims.

Osha goes to Winterfell's godswood to pray to the Old Gods of the Forest, and finds Bran there. She tells him that north of the Wall, the old gods are the only gods. She also says that Robb is leading his army in the wrong direction. The true enemy lay to the north, beyond the Wall, not the south. When Hodor passed by naked, Osha remarks he must have giants' blood in him, and tells Bran that giants - and worse - exist north of the Wall.

After Bran dreams that he saw his father Ned in the catacombs of Winterfell. Osha accompanies Bran into the tombs to check. Once inside, they are surprised by Shaggydog and find Rickon there too: having experienced the same dream as his elder brother. When they emerge from the tomb Luwin tells the boys that their father has been killed.