Wirga was an old female sea rat member of Raga Bol's crew. She was a seer and a healer, and she replaced Bol's paw with a hook. Wirga had three sons who used blowpipes with poisoned darts. They were sent with Jibsnout to ambush Lonna Bowstripe, but Lonna killed two of them and Figalok killed the other. Wirga didn't seem to ever miss them. However, this could be because Raga Bol hid news of their deaths from his crew and slew the messenger.
She was killed by Toran Widegirth near Redwall Abbey when she was trying to ambush Lonna.