Crumtail was a tall, sly ferret under the command of Syzran in Syzran's Horde. He was good friends with Grimeye and Niptongue. He stayed back at the camp during Voskriss and Gritsnout's siege over Redwall Abbey. The ferret was not a big fan of Syzran's leadership, especially after the fox killed Niptongue.