High Quality Content by WIKIPEDIA articles! Prince Rabadash is a human character and the main antagonist in C. S. Lewis`s fantasy novel The Horse and His Boy. Rabadash is the heir to the throne of Calormen, being the eldest son of the Tisroc. In The Horse and His Boy, he attempts to conquer Archenland, the neighbouring country of Narnia, but is thwarted by King Edmund and Queen Lucy of Narnia, with help from a boy named Shasta.