Diamondback, otherwise known as Diamond or Dia, is a wild bay mare with a badger face and a curved dorsal stripe that gives the impression of a string of diamonds down her back. She has round, golden eyes with slit pupils and is also very good at kicking with all four feet. She, Tess, Jacki and Candlesmoke were sent to Redwall Abbey to defend it against Zanog Gonza and his horde.