Fourdun was an older male squirrel hermit that resided in Mossflower Woods. He was captured by Rapmark Gaduss of the Rapscallion army. Damug Warfang expected Fourdun to give him information regarding Redwall Abbey; however, Fourdun was unable to tell him anything, as he lived too far away to bother with the Abbey.
He was rescued from the Rapscallion camp by Midge Manycoats and Tammo.