Rumbol was a male otter, a member of Skipper's crew. He was the brother of Churk, the nephew of Skipper, and a descendant of Deyna I, Rillflag, Filorn, and Deyna. Rumbol helped to defend Redwall Abbey against the vermin attack. Later, he recruited ten other otters to hold Redwall safe, when Triss with her friends went to free slaves from Riftgard.