A character with the "soul of chivalry," according to Andrew Rilstone's alt.books.cslewis FAQ, Reepicheep is a Talking Mouse in three books of the Chronicles of Narnia series by C.S. Lewis. Much taller than an ordinary mouse, Reepicheep and his soldiers fought in the battle at Aslan's How in the book Prince Caspian. Gravely wounded, he was healed of everything but the loss of his tail by Lucy Pevensie's healing cordial. When his fellow Talking Mice drew their swords, preparing to share in Reepicheep's dishonor, Aslan joyfully restored his tail.
Reepicheep accompanied Caspian on The Voyage of the Dawn Treader to the World's End. He formed a "special" relationship with Eustace Scrubb, who boarded a spoiled child but made a remarkable improvement.
Reepicheep was last seen greeting the Friends of Narnia as they were welcomed into Paradise after The Last Battle.