Bagg, the twin brother of Runn, was a mischievous young otter Dibbun in the time of Abbot Bernard at Redwall Abbey. Bagg, Runn, and their mole friend Grubb, saved the Abbey from searats by using Friar Alder's best chopping knives to cut the rats' grappling hooks on the north wall of the Abbey and stopped a siege. It was Bagg and Runn who brought Aubretia and Bultip to Redwall.