Reepicheep is a character of several novels by C. S. Lewis.
Reepicheep was one of the Talking Mice of Narnia, and was their leader. He was also one of Caspian's most loyal and bravest knights. His second-in-command was Peepiceek. Reepicheep lived before and during the reign of Caspian X, and was completely loyal and faithful to Aslan. He took part in the Narnian Revolution, nearly getting killed in the process, and also sailed with Caspian on the Dawn Treader to the End of the World.