Reepicheep is a major protagonist in the The Chronicles of Narnia novels Prince Caspian and Voyage of the Dawn Treader. He is a mouse and warrior who was descended from the same mice who freed Aslan from his bonds after the White Witch killed him.
Reepicheep is loyal to Aslan, the Pevensie children and Caspian X, joining them in their revolution to fight the telmarines. He later joined Caspian, Lucy and Edmund Pevensie on a voyage to Aslan's Country.