Aurnith was the elder of a pair of twins born to the ranger Anunir and his wife, Gwenneth, who died giving birth to the younger, a boy named Aurhanar. Though Aurnith was a healthy child, her brother was sickly and sadly did not survive his first month. Bitter at the loss of his wife and son, Anunir eventually accepted that Aurnith would be his only heir and decided to train her; however, he never quite stopped resenting her, and his methods were highly questionable.

As a child, Aurnith was often left out in the woods with nothing but a knife and the simple instruction, "survive." At age six, she fought her way out of a den of wolves, and by her twelfth birthday, she had killed her first orc. This brutal training eventually estranged her from her father, and when she came of age, she left Anunir, and began roaming the countryside on her own.

Eventually, Aurnith came to Bree-land, where she worked as a mercenary for the town guard, routing bandits and brigands. Though she did discover her talent for military leadership this way, she never fully fit in among the men of Bree, and was eager to leave when the opportunity presented itself. Recently, she received a letter informing her of her father's death at the hands of orcs. Though she had no love for Anunir, she has the vague idea that tracking down his killers might give her some kind of closure, somehow.

Besides her desire to avenge her father, Aurnith would very much like to seek out the Dunedain and become a Ranger in truth. Anunir never formally introduced her to his brethren, and Aurnith hopes that perhaps in finding her own people she will finally find a group with whom she seems to belong.