Please note, the following Character Profile does contain spoilers from both the Percy Jackson and the Heroes of Olympus series by Rick Riordan.

Name: Percy Jackson
Father: Poseidon (Neptune)
Mother: Sally Jackson
Step-Father: Paul Blofis
Fatal Flaw: Loyalty. In the books, it is often repeated that Percy’s downfall will be his unwavering loyalty to his friends and loved ones.
First met: Percy Jackson and the Lightning Thief

Character Overview: Percy is the initially unwilling hero of Olympus both in the fight with the Titans and again, in the fight against Gaia and the Giants. He is a natural born leader, who usually leads by running into the middle of the fight. He is loyal to a fault, literally, as his loyalty has been used against him by his many enemies. He is stubborn yet lovable. While he may not be incredibly intelligent, he has a charisma that draws others to him and an ability to lead that even Romans cannot help but admire.

Having the blood of the sea-god running through him, Percy is able to accomplish extraordinary feats, with near inexhaustible stamina while in or over water, which has allowed him to duel with beings like Ares, the god of war. He knows his exact location and bearing while over salt water and can even summon water at will, though this tends to leave him drained.