Bonosos was a Videssian mage attached to the army of General Kypros Zigabenos, and present at the siege of Sotevag. Bonosos detected Halogai mage Kolskegg Cheese-Curd's attempt to use necromancy to falsify Ulror Raska's son's death. Bonosos shared this with Zigabenos. Zigabenos was skeptical that the Halogai were using necromancy, which insulted Bonosos. Later, Bonosos confirmed, incorrectly, that Ulror was indeed dead.