Listed are the major characters in the series.
Percy Jackson: age 12–16, demigod son of Poseidon; he is the protagonist of the series.
Grover Underwood: age 28–32, equivalent to 14–16 in human development, Satyr, best friend of Percy.
Annabeth Chase: age 12–16, demigod daughter of Athena, strong friend, and later, the girlfriend of Percy. Very intelligent, skilled in architecture and strategy.
Luke Castellan: age 19–23, demigod son of Hermes who is revealed to be working for Kronos.
Thalia Grace: age 15 and one day from 16 (permanently), demigod daughter of Zeus, first appears at the end of The Sea of Monsters and becomes lieutenant of Artemis in The Titan's Curse, making her immortal with the exception of death in battle or breaking her vow to never date.
Nico di Angelo: age 10–12 (75) , demigod son of Hades, holds a grudge against Percy temporarily, because he thinks his older sister Bianca died because of Percy, commands the dead and always wears …show more content…
(born June 5, 1964)[1] is an American author best known for writing the Percy Jackson & the Olympians series. He also wrote the Tres Navarre mystery series for adults[2] and helped to edit Demigods and Monsters, a collection of essays on the topic of his Percy Jackson series. He helped develop the 10 books in The 39 Clues series, published by Scholastic Corporation, and wrote the first book in the series, The Maze of Bones.[3] He is currently working on the third books of two new series: The Kane Chronicles, which focuses on Egyptian mythology; and The Heroes of Olympus, which is the sequel to the Percy Jackson series and which focuses on Greek and Roman