Percy Jackson and the Olympians: Legends

Blackjack is Percy Jackson's friendly, pure black pegasus. He often serves as Percy's main option of transportation. Blackjack and other Pegasi often go to Percy, who helps them with their, or other creatures' problems.

Blackjack has a highly informal personality. Although he is willing to serve Percy, he calls Percy "boss" rather than "Lord," as well as once calling Dionysus "the wine dude", much to the latter's annoyance. Blackjack has two best friends, Guido and Porkpie, who are also pegasi. Blackjack is extremely loyal to Percy, and shows a personality as being able to be loyal to anyone who proves their worth. He is seen as a friend for Percy when Annabeth is lost and is said to, "probably run himself into the ground before saying he's tired" when he's carrying Percy. Blackjack is also quite compassionate, comforting Reyna when things seemed hopeless to her which she greatly appreciated.

Blackjack was at one point taken prisoner by the Titan Army and held on the Princess Andromeda. until Percy released him indirectly. Percy mentions that he does not let anyone ride Blackjack except himself. Ever since Percy indirectly freed him, he thought of Percy as a hero. So much so, that he woke Percy up to help any creatures that he could not help himself.