Arven was a male squirrel of Redwall Abbey. As a Dibbun, he was a very good friend of Tansy and had a special nickname for her, "Tansy Pansy". When out searching for herbs with Tansy, he accidentally fell into a hole containing the skeleton of the weasel Graylunk, which spurred the search for the Tears of all Oceans. As an adult, he became the Abbey Warrior and fought in the Battle of the Ridge of a Thousand. Near the end of his life he became the Abbot of Redwall for three seasons. He passed away after surviving a harsh winter; Abbess Songbreeze Swifteye was his successor.