Percy Jackson - the demigod

Perseus "Percy" Jackson is the title character and narrator of Rick Riordan's Percy Jackson & the Olympians series.Percy Jackson is a demigod, the son of the mortal Sally Jackson and god Poseidon. He has ADHD and dyslexia, and has been expelled from almost every school he has ever attended. He is 12 years old in The Lightning Thief and 16 in The Last Olympian. Like other half-human demigods, he is expected to act as the Olympian gods' agent in the mortal world, taking action where ancient laws forbid direct godly intervention, usually in the form of quests. His personality is described as "changeable" and hard to predict with the exception that he is very loyal to his friends. His powers, which start small and develop as the books proceed, include controlling water, making hurricanes, breathing underwater, and talking to horses. He also becomes an accomplished swordfighter and leader.

Percy Jackson's fatal flaw is loyalty, which he at first questions how it can be a weakness, but then seems to accept it and try to not let it control him. Throughout the rest of Percy Jackson & The Olympians, Percy grows more confident and courageous. He overcomes several obstacles that have been thrown at him to keep him from saving the world.The Blood of Olympus ends with Percy and Annabeth planning to finish senior year in New York before heading to the college in New Rome.