Guido

Guido is a Pegasus and a friend of Blackjack.

The Titan's Curse
He appears with Blackjack and Porkpie to take Percy, Annabeth and Thalia to Olympus.

The Last Olympian
Guido helps Percy in the Battle of Manhattan. He also is a friend of Blackjack. Guido is one of the three pegasi that help Percy, Annabeth and Rachel. Guido always refers to Percy as his boss and he would transport anyone for him. Guido usually appears with Blackjack and his other friend, Porkpie, to give a ride to Percy and his friends.