Sacker is the general of the Ninth Legion of Terror (Cognomen Regicides). Sacker is a female goblin and a former Matron of a goblin tribe in the Grey Eyries.
Sacker is under five feet tall, with heavy wrinkles on her face and visibly appears to be old. She has yellow eyes that are described as calculating with a burning intensity. Sacker is currently missing one of her eyes as a result of an exploding sharper. By Book 7, her missing eyes has been replaced with a fake eye.