Percy has two magical pets and companions. The first is Blackjack, a Pegasus that Percy liberated in The Sea of Monsters. Since then, Blackjack has become his personal steed and the two can speak to each other, Blackjack repeatedly has to save Percy's life. Blackjack is quite fond of sugar cubes and doughnuts. The second is Mrs. O'Leary, a pet hellhound that he received from Daedalus (Quintus in the first chapters) before the inventor died in The Battle of the Labyrinth. He refers to Mrs. O'Leary as his "dog". The mist somehow causes her to appear as a poodle to mortals.