The Mountain "prince," son of Eyod and older brother of Kettricken. He works with King-in-Waiting Chivalry during the negotiation of the border treaties between the Mountain Kingdom and the Six Duchies.

Rurisk was wounded in the lungs by an arrow in his early adulthood, but has recovered well.

He favors the alliance with the Six Duchies and supports the marriage between Verity and Kettricken.

Rurisk dies of drinking poisoned wine, despite Fitz's best efforts to save his life. The wine had been a gift from Regal. This leaves Kettricken the sole heir of the Mountain Kingdom.

There is also a warship that Verity named after him.