Lugworm was a sly male stoat soldier of the Rapscallions. He rigged the fight between Damug Warfang and his brother Byral Fleetclaw, ensuring Damug's victory. Lugworm also knew a trick to rig the ceremonial throwing of the Rapscallion sword, by attaching a brass clip to it so it always fell the same side up. Lugworm served as Damug's aide and advisor for a short while. He was nearly strangled by Damug for mentioning Lady Cregga Rose Eyes, causing him to turn over to Borumm and Vendace, two Rapscour officers who were traitors to Damug. He did not know that he was being watched by Gribble.
During an assassination attempt against Damug, Lugworm was captured along with Borumm and Vendace. They were sentenced to life in chains, but escaped with a file and headed towards a nearby river, in which 30 scouts had been sentenced to stand after an unfortunate incident involving shrews. Borumm, Lugworm, and Vendace freed these prisoners as well, and escaped across the river with them. However, Borumm and Vendace had already decided that they could not trust a backstabber before the escape attempt, so Borumm slew Lugworm with the chains that had previously held them captive, and left his body in the river.