Blackjack

Blackjack is a friendly black pegasus who was saved by Percy Jackson from Luke on the Princess Andromeda in the The Sea of Monsters. In The Titan's Curse, Blackjack gave Percy a ride from Camp Half-Blood all the way to New Jersey trying to catch up with Thalia, Grover, Bianca di Angelo, and Zoe Nightshade. In The Battle of The Labyrinth, Blackjack and some other pegasi come at Percy's call to take them back to Camp Half-Blood. In The Last Olympian, he lands on Paul Blofis' car, with Charles Beckendorf on his back. Blackjack carried Percy to the Princess Andromeda,he also brings Rachel Elizabeth Dare to Camp Half-Blood

Blackjack is featured along with Percy on the cover of The Last Olympian, and The Titan's Curse.

In The Titan's Curse, Aphrodite said she was the one who sent Blackjack to help Percy from Camp Half-Blood.

Blackjack has a highly informal personality-- just as willing to serve Percy but he always calls Percy 'boss' rather than the more formal titles the other pegasi use.

Blackjack is different from the other pegusi at camp. He is the only Black pegusi there.

Trivia

His gender is somewhat inconsistent as in The Sea of Monsters he is referred to as a mare but from The Titan's Curse onward, Percy refers to him as "he".