Osha is spearwife and raider of the Free Folk from north of the Wall. She is described as hardly looking like a woman, having a hard face, and being lean and tall, a head taller than Robb Stark. She is also described as tough and uncomplaining.

She has shaggy brown hair. She worships the Old Gods of the Forest and is knowledgeable about the old gods, the north and its inhabitants.