Piknim was a young female mouse of Redwall Abbey. She was the best friend of the squirrel Craklyn and also good friends with the hedgehog Tansy. She assisted Rollo and the others in solving the riddles attached to the Tears of all Oceans. Piknim and Craklyn were very active and agile and loved to race each other. They would often use the search for the pearls as an opportunity to challenge each other up or down the stairs and throughout the Abbey.