Olus was a Roknari prince, best known for his habit of burying his enemies in excrement and burning them alive. Five years before the start of Curse of Chalion, he was involved in a border war with Chalion. Cazaril and Dondo dy Jironal were sent to parlay with him. Olus decided he only needed one messenger to return, so gave Cazaril and Dondo a choice. Whichever one would cut off the head of the other would be allowed to return back to the Chalionese lines. Given first choice, Cazaril refused the offer. When Dondo took it up, Olus blocked the sword thrust and sent both back, knowing there would be bad blood between the two.
Olus was murdered about a year later by his own bodyguards.