Ferris O'Carrick was the King of Clonmel and the younger twin bother of Halt. He tried to kill Halt at least three times when they were younger, by way of poisoned shrimp, falling roof slates, and drowning. Halt's parents turned a blind eye to his behavior, possibly because they felt bad that he would not be king. Only Caitlyn, Ferris' and Halt's sister, saw his treachery. He assumed the throne of Clonmel after Halt left the kingdom.