Lieth was a descendant of the people of the Valley of Gold and a former prisoner in the Land of the Zebak. He was one of the Zebak warrior slaves who rebelled against their masters during the Zebak's first invasion of the island of Maris 300 years ago and went on to settle on the island. Lieth became the Chooser on the day of the invasion, after the Mirril clan was eradicated. His bloodline, which includes Jiller, Rowan and Timon, have been the Choosers for the last 300 years.
Lieth originated in the Rin compound within the Zebak city, enslaved like all of his people. He, like his people, were descendants of the people heralding from the Valley of Gold on the island of Maris, who had been captured and taken across the sea by the Zebak to their land.
Lieth was one of the warrior slaves chosen by the Zebak to fight against the Maris and Travellers in their attempt to invade and take control of the island of Maris. His memories were completely wiped away by the Zebak, to ensure that he, and the other warrior slaves, forgot that their ancestors were people of the land they were invading and focused entirely on the war. This plan went awry when the slaves rose up against their masters, following them witnessing the Zebak killing every adult and child of the Mirril Chooser clan by throwing an exploding fire into their meeting house whilst laughing about it. The horror of the moment roused the slaves, they broke their chains and joined forces with the Maris and Travellers to repel the invaders. The warrior slaves then settled in a valley inhabited by bukshah which eventually became the village of Rin.
During the invasion, the Keeper of the Crystal of that time lay dying. The Mirril Chooser clan had been eradicated by the Zebak on the morning of the invasion, however the Crystal, though dim, still had a bit of power left and the Keeper was as cunning as Orin the Wise. The Keeper, with the help of the Crystal, selected Lieth and offered him to act as a Chooser during the Choosing of the new Keeper. Lieth went to the Island in the Maris harbour and completed the Choosing. The newly appointed Keeper then used the power of the Crystal to banish the Zebak from Maris, finally ending the conflict. Following that day, Lieth's descendants became the new Chooser bloodline and acted as Choosers during subsequent Choosings.